African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12218

AJB Articles

March 2018

Impact of clarification process on the nutritional, mineral and vitamin composition of cashew (Anacardium occidentale) apple juice

This study investigates the impact of clarification process on the nutritional, mineral and vitamin composition of the cashew apple juice. The proximate composition in percentage for moisture, dry matter, ash, crude fibre, ether extract, crude protein and carbohydrate were determined in line with the recommended methods of Association of Official Analytical Chemist (AOAC), and vitamin profile was analysed using Gas...

Author(s): Ukonze J. A., Ogu E., Onu F. M., Dimelu I., Ifeanyieze F. O. and Ejiofor T. E.

February 2018

Extraction of high quality RNA from hard tissues of adult coconut palms

An experimental protocol originally designed to isolate plant DNA was modified to obtain high quality total RNA from organs of adult coconut palms collected in situ. With this protocol, high quality RNA was extracted from leaves, inflorescences, primary and secondary roots, zygotic embryos and solid endosperm, with no carbohydrate or protein contamination. Reverse transcription-polymerase chain reaction (RT-PCR)...

Author(s): Ramón Souza-Perera, Nelson Torres-Hernández and José Juan Zúñiga-Aguilar

February 2018

Shell morphology and the radula structures of two closely related bulinid snails intermediate host of Schistosoma haematobium in Nigeria

Bulinid snails act as intermediate host of schistosomes and the presence of the snail gives schistosomiasis an expansive characteristics. Schistosomiasis is of medical and veterinary importance in the tropical and subtropical regions. The shell shape and structure of radula teeth of bulinids are often specific to a species or genus, and are widely used for gastropod species identification. Bulinid species collected from...

Author(s): Opeyemi Gbenga Oso and Alexander Bababunmi Odaibo

February 2018

Effect of water deficit at different stages of development on the yield components of cowpea (Vigna unguiculata L. Walp) genotypes

Cowpea cultivation is widespread in West Africa where it is an important source of protein. This study is aimed at determining the effects of water deficit applied at different stages of cowpea development on yield and its components (pod number, seed number, seed yield, aerial biomass yield, harvest index and root biomass of the plant). The experiments were carried out in pots during the rainy season of 2016 under...

Author(s): TOUDOU DAOUDA Abdoul Karim, ATTA Sanoussi, INOUSSA Maman Maârouhi, HAMIDOU Falalou and BAKASSO Yacoubou  

February 2018

Maximizing L-glutaminase production from marine Bacillus subtilis JK-79 under solid state fermentation

L-Glutaminase is majorly produced by microorganism including bacteria, yeast and fungi. It mainly catalyzes the hydrolysis of gamma-amido bond of L-glutamine. In the present investigation, the potent marine isolate, Bacillus subtilis JK-79 producing L-glutaminase was evaluated for the maximum L-glutaminase production by solid state fermentation (SSF). In this context, different agro-industrial residues reported in...

Author(s): Jambulingam Kiruthika, Nachimuthu Saraswathy and Saranya Murugesan

February 2018

Antioxidant and antibacterial activities of essential oil of Lippia sidoides against drug-resistant Staphylococcus aureus from food

Chemical composition, in vitro antioxidant and antibacterial activities of essential oil of Lippia sidoides (EOLS) and its major constituent was investigated. Chemical composition was analyzed in a gas chromatograph coupled to a mass spectrometer (GC/MS). Antioxidant activity (AA) was obtained using 2,2-diphenylpicrylhydrazyl (DPPH) radical scavenging assay. Antimicrobial activity was tested using disk-diffusion test...

Author(s): Renata Albuquerque Costa, Theodora Thays Arruda Cavalcante, Carla Thiciane Vasconcelos de Melo, Domingos Lucas Araújo Barroso, Hider Machado Melo, Mário Geraldo de Carvalho and Francisco Eduardo Aragão Catunda Júnior,

February 2018

Chlorella vulgaris DPSF 01: A unique tool for removal of toxic chemicals from tannery wastewater

The present study investigated the removal of toxic pollutants and reduction of heavy metals from tannery wastewater using Chlorella vulgaris. The physiochemical parameters like pH, electrical conductivity (EC), biological oxygen demand (BOD), chemical oxygen demand (COD), total solids (TS), total dissolved solids (TDS), chloride, total hardness (TH), bicarbonate, magnesium, ammoniacal nitrogen, phosphate and heavy...

Author(s): P. S. Subashini and P. Rajiv

February 2018

Efficacy of lantana (Lantana camara) extract application against aphids (Brevicoryne brassicae) in rape (Brassica napus) over varied periods of time

Contact bioefficacy of lantana (Lantana camara L.) leaf extract (LLE) against rape aphids (Brevicoryne brassicae L.) in three rape (Brassica napus L.) seed brands at given time (hours) periods was explored. Samples of pounded young leaves mixed with distilled water (3 kg l-1, 2 kg l-1 and 1 kg l-1) were prepared. Dimethoate (7.5 ml 10 l-1) and distilled water were the positive and negative controls, respectively....

Author(s): Culver Mvumi and Precious R. Maunga

February 2018

The antibacterial activity of bacterial endophytes isolated from Combretum molle

Although intense research has gone into the exploration of various Combretaceae species towards the discovery of therapeutic relevant compounds, their endophytes have never been explored as potential repositories of alternative sources of novel and medically beneficial equivalents. In the present study, five bacterial endophytes (Lysinibacillus, Staphylococcus, Enterobacter, Pseudomonas and Bacillus species) were...

Author(s): Mamonokane O. Diale, Eunice Ubomba-Jaswa, and Mahloro H. Serepa-Dlamini

February 2018

Isolation, purification and partial characterization of thermostable serine alkaline protease from a newly isolated Bacillus thuringinsis-SH-II-1A

In the present study, the isolation, purification and partial characterization of thermostable serine alkaline protease produced from Bacillus thuringinsis SH-II-1A was reported. The culture was isolated from soil of slaughter house waste and identified further from ribosomal sequence. The crude enzyme was purified by ammonium sulfate precipitation, dialysis and Sephadex G-200 gel permeation chromatography up to 17.04...

Author(s): Sunil L. Harer, Manish S. Bhatia and Neela M. Bhatia

February 2018

Cucurbit yellow stunting disorder virus and watermelon chlorotic stunt virus induced gene silencing in tobacco plants

Cucurbit yellow stunting disorder virus (CYSDV) and Watermelon chlorotic stunt virus (WmCSV) are the most widespread and damaging viruses to cucurbits in the Middle East. CYSDV and WmCSV are cucurbit-infecting bipartite whitefly-transmitted viruses. Post-transcriptional gene silencing (PTGS) is a universal mechanism by which plants are able to systemically switch off the expression of targeted genes via the reduction of...

Author(s): Ahmed Mohamed Soliman, Adel Abdelsabour Rezk, and Khalid Abdallah Alhudaib

February 2018

Tomato yellow leaf curl virus: Diagnosis and metabolites

The existence of Tomato yellow leaf curl virus (TYLCV) was figured out in different locations in Al-Ahsaa of Saudi Arabia. Polymerase chain reaction (PCR) results of samples collected showed that TYLCV existed in all locations. Using AVcore and ACcore primers, begomoviruses family were detected in symptomatic tomato plants and by using TYv2664 and TYc138 (specific primers for the detection of TYLCV), the results proved...

Author(s): Ahmed Mohamed Soliman, and Maged Elsayed Mohamed,

February 2018

Polymerase chain reaction amplification of 16S rDNA from three nosocomial bacterial isolates in Kaduna State, Northern Nigeria

A wide variety of opportunistic pathogens has been detected in hospital surfaces. Medical center surfaces can serve as reservoirs of pathogenic bacteria. Among this pathogens, Pseudomonas species are one of the leading causes of nosocomial infections, frequently found in hospital environments. Polymerase chain amplification system remains one of the best methods for the rapid detection of low numbers of pathogenic...

Author(s): Richard, R., Denwe, S. D.., Yerima, M. B. and Olatunde, S. K.

February 2018

The nitrogen-fixing Frankia significantly increases growth, uprooting resistance and root tensile strength of Alnus formosana

Restoration of Alnus formosana (Burk.) Makino on landslide areas is important for agroforestry, forestry and soil erosion control in Taiwan. To ensure successful reforestation, A. formosana seedlings have to develop strong root system for nutrient and water acquisition as well as anchorage. Inoculating of A. formosana with symbiotic nitrogen-fixing actinobacteria Frankia may help mitigate drought and nutrient...

Author(s): Jung-Tai Lee and Sung-Ming Tsai

February 2018

Characterization of biodiesel obtained from atemoya (Annona squamosa × A. cherimola) seed oil

Biodiesel is derived from renewable sources, such as vegetable oils, by means of a transesterification process in which triacylglycerols are transformed into smaller molecules of esters of fatty acids and glycerol. The transesterification reactions of ‘Gefner’ atemoya (Annona squamosa × A. cherimola) seed oil extracted by pressing (physical) and solvent (chemical) processes were studied, with analysis...

Author(s): Luciana Soares Da Cruz, Bárbara Lemes Outeiro Araújo, Luiz Roberto Marques Albuquerque, Pedro Castro Neto, Angelita Duarte Corrêa and Luciana de Matos  Alves Pinto

February 2018

Toxicological and safety assessment of tartrazine as a synthetic food additive on health biomarkers: A review

Recently, progressive use of synthetic food additives increase the attention paid on their benefit and toxicity in food, especially for the young. One of these additives is artificial azo dyes tartrazine. This study aimed to provide an outline of the existing evidence on the beneficial and side effect of food additive with special reference to tartrazine on different organ health. The methods include updated search for...

Author(s): Kamal A. Amin, and Fawzia S. Al-Shehri  

February 2018

Development and improved selected markers to biosurfactant and bioemulsifier production by Rhizopus strains isolated from Caatinga soil

This study screened four Rhizopus species as biosurfactant producers using different markers. First of all, Rhizopus spp. UCP 1607 was identified as Rhizopus arrhizus by morphological and molecular methods. The production of biosurfactant/bioemulsifier was investigated by submerged fermentation using soybean post-frying oil (5% v/v) and sodium glutamate (1% w/v) medium. The primary markers’ hemolysis and parafilm...

Author(s): Milagre A. Pele, Dayana Montero-Rodriguez, Daylin Rubio-Ribeaux, Adriana F. Souza, Marcos A. C. Luna, Michele F. Santiago, Rosileide F. S. Andrade, Thayse A. Lima e Silva, André L. C. M. A. Santiago and Galba M. Campos-Takaki  

February 2018

A comparative study on bacterial conversion of selected agricultural biomass to ethanol

The aim of the study was to investigate the bioethanol production potentials by indigenous bacterial isolates screened for amylolytic and cellulolytic activities. Cassava peels were obtained from local ‘garri’ producers, while corn grains and corn cobs were gotten from retailers within the Erinfun farm settlement along Afe Babalola University Road, Ado-Ekiti, Ekiti State, Nigeria on June 4, 2015. The...

Author(s): Oso B. A., Ogunnusi T. A. and Oyetunji O. A.  

February 2018

Morphophysiological diversity of rhizobia nodulating pigeon pea (Cajanus cajan L. Millsp.) growing in Ethiopia

Pigeon pea (Cajanus cajan (L.) Millsp.) is an important protein source grown in several tropical and sub-tropical countries, and is considered a multi-purpose plant that is resistant to the conditions where drought and salinity is a common phenomenon. The aim of this study was to evaluate the diversity of rhizobial isolates obtained from root nodules of pigeon pea plants grown in central and southern Ethiopia. A total...

Author(s): Tulu Degefu, Endalkachew Wolde-meskel, Makka Adem, Asnake Fikre, Tilahun Amede and Chris Ojiewo  

January 2018

Controlled fermentation of the zoom-koom dough using two isolates of lactic acid bacteria (LAB 1 and LAB 5) as starter cultures: Effect on hygienic, rheological, nutritional and sensorial characteristics of the final product

Zoom-koom is a popular non-alcoholic beverage in Burkina Faso, which is based on cereals and mainly produced by women with important socio-economic implications. This study aimed to evaluate the effect of controlled fermentation using two selected isolates of lactic acid bacteria (LAB) as starter cultures, on the rheological and hygienic quality of zoom-koom. The starter cultures were used singly in monoculture and both...

Author(s): Tapsoba Fidèle Wend-bénédo, Sawadogo-Lingani Hagrétou, Kaboré Donatien, Zongo Sandrine, Compaoré-Sérémé Diarra, and Dicko Mamoudou Hama

January 2018

Identification and major technological characteristics of Lactococcus and Lactobacillus strains isolated from "hamoum", an Algerian fermented wheat

Twenty-eight strains of lactic bacteria were isolated from fermented wheat "hamoum" and phenotypically attributed to the following species: seven strains of Lactococcus lactis subsp. lactis, six strains of Lactobacillus brevis and 15 strains of Lactobacillus plantarum. The acidifying behavior of the strains is considerably variably demanding on considered strain. The amounts of lactic acid produced reached 9.7...

Author(s): Khadidja KALBAZA, Halima ZADI-KARAM and Nour-Eddine KARAM

January 2018

Bio-preservation of Nigerian soft-white cheese in submerged consortium of bacteriocinogenic lactic acid bacteria culture

Bio-preservation of Nigerian soft-white cheese (wara) in submerged consortium of bacteriocinogenic lactic acid bacteria (LAB) culture was investigated. Lactobacillus acidophilus PIT17 and Lactococcus lactis PIT30 were isolated from pito using the pour plate technique on MRS medium. The selection of L. acidophilus PIT17 and L. lactis PIT30 for the bio-preservation studies were based on their ability to produce...

Author(s): Mohammed S. S. D., Wartu J. R., Aminu A. H., David A. A. D. and Musa B. J.  

January 2018

Evaluation of genetic diversity of okra accessions [Abelmoschus esculentus (L. Moench)] cultivated in Burkina Faso using microsatellite markers

Okra is a traditional vegetable grown throughout Burkina Faso. Despite a food and non-food valorization of all parts of the plant, its genetic diversity is still little known. Thus, 50 accessions of okra from Burkina Faso were characterized using 19 microsatellite markers in order to determine the level and structure of genetic diversity. The results reveal a total of 34 alleles including 3 rare alleles and a number...

Author(s): Mahamadi Hamed OUEDRAOGO, Nerbéwendé SAWADOGO, Téyouré Bénoît Joseph BATIENO, Wend-Pagnangdé Marie Serge Félicien ZIDA, Ali Lardia BOUGMA, Antoine BARRO, Zakaria KIEBRE and Mahamadou SAWADOGO

January 2018

Antibacterial effect of Thymus sp. and Boswellia sp. extracts on Streptococcus pneumoniae and Klebsiella pneumoniae isolates

The antimicrobial activity of essential oils of Boswellia and thyme (Boswellia sp., and Thyme sp.) was evaluated against 20 clinical isolates of Streptococcus pneumoniae and 5 isolates of Klebsiella pneumoniae. Essential oils were prepared using methanol and water (1:1) with HPLC technique. Antimicrobial activity and minimum inhibitory concentration (MIC) were measured using disk diffusion method against 20 isolates of...

Author(s): Sahar K. Al-Dosary

January 2018

Effect of antioxidants (taurine, cysteine, α-tocopherol) on liquid preserved Kolbroek boar semen characteristics

Successful artificial insemination depends on maintaining longevity of semen in the reproductive tract, and semen characteristics among others. The study compared efficacy of Androhep extender supplemented with 75 mM taurine, 5 m M-cysteine, or 200 mg/l alpha-tocophero on liquid preservation of Kolbroek boar semen characteristics over 24 and 48 h after storage at 17°C. Total motility was evaluated using computer...

Author(s): Chatiza, F., Mokwena, P. W., Nedambale, T. L., and Pilane, C.

January 2018

Antioxidant and antikindling effect of Tapinanthus globiferus growing on Ficus glumosa in pentylenetetrazole induced kindled rats

Tapinanthus globiferus growing on Ficus glumosa is a plant used locally for the treatment of epilepsy. It is found in West Africa on many tree crops. The present study aims to investigate the anti-kindling and antioxidant activity of the aqueous extract of T. globiferus. A total of 40 rats were divided into 4 groups (n=10). Groups 1 to 3 received 100, 200 and 400 mg/kg, respectively, of the extract orally, followed by...

Author(s): Abubakar, K., Yunus, A. T., Abubakar, M. R., Ugwah-Oguejiofor, J. C. and Muhammad, A. A.

January 2018

Optimized production of phytase by solid-state fermentation using triticale as substrate and source of inducer

This study was carried out to evaluate the process of phytase production by Aspergillus niger in solid-state fermentation (SSF) using triticale waste. A waste that currently has no use was reported for this biotechnological process, and is of high impact due to the null use. The process was carried out using an additive free medium, supplemented with only one nitrogen source. Under these conditions, phytase activity of...

Author(s): Alberto A. Neira-Vielma, Cristóbal N. Aguilar, Anna Ilyina, Juan C. Contreras-Esquivel, María das G. Carneiro-da-Cunha, Georgina Michelena-Álvarez and José L. Martínez-Hernández

January 2018

Dormancy breaking and germination of cat thyme Teucrium marum (Labiatae)

Cat thyme is an important medicinal plant used for treating many diseases. With renewed interest as arthropod deterrent and repellents, there is immediate need to cultivate cat thyme on large scale in the laboratory. To improve cat thyme seed germination, obstacles involved in its seed dormancy must be investigated. To address such challenges, mechanical abrasion and chemical treatments were used to enhance the rate of...

Author(s): Chauhan K. R., Natarajan S., and Webb M.

January 2018

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Bioenergy production from biomass and agricultural wastes has gained significant interest due to rising fossil fuel prices and their decrease in air pollutant emissions. This review paper evaluates the state-of-art for the several applications from cassava harvest residues and their use in bioenergy industry, using different thermochemical and biochemical processes. Regarding the great available literature for this...

Author(s): Alyson L. P. Rodrigues, Glauber Cruz, Maria E. P. Souza and Wolia C. Gomes

January 2018

Effect of Moringa oleifera leaves extract on the oxidative stress and gastric mucosal ulcer induced by indomethacin in rats

Indomethacin is commonly used as an anti-inflammatory and pain relieving medication; however, it has the side effect of gastric ulcer formation which is an actual common gastrointestinal illness that may result in dangerous complications and even death. Various diseases have been treated widely by the use of oriental herbal medicines, this study aims to evaluate the antiulcerative and antioxidative effect of two doses...

Author(s): Hessah Mohammed Almuzafar

January 2018

Biodegradation of phenol by free and immobilized Candida tropicalis NPD1401

The present research aimed to evaluate the free and immobilized cell of Candida tropicalis NPD1401 for phenol degradation. Immobilized cell of C. tropicalis degraded efficiently up to 98% at a concentration of 1000 mg/l of phenol whereas free cells degraded up to 63% of the same concentration under 9 days of incubation. Stored immobilized beads were reused after 15 days and found to have successfully degraded 62.1% of...

Author(s): Satish Kumar, Neeraj, Viraj Krishna Mishra and Santosh Kr. Karn

January 2018

Semen quality characteristics and testosterone levels of rabbit bucks fed Costus afer leaf

Previous studies have shown Costus afer to possess ethno-medical and ethno-veterinary properties, however, the link between C. afer and reproductive activities are not clear. The aim of this research was to assess the impact of C. afer leaf on semen quality characteristics and testosterone levels of adult buck rabbits. Eighteen adult crossbred New Zealand and Chinchilla breeds were divided into three treatments (A, B...

Author(s): P. K. Ajuogu, , U. Herbert, P. C. Ibeh, M. B. Nodu, U. H. Ukpabio, C. G. Onyegbule and A. O. Akintola

January 2018

Influence of spacing and application of biofertilizer on growth and yield of okra (Abelmoschus esculentus (L.) Moench)

The adequate spacing in okra (Abelmoschus esculentus) influences its growth and fruit production. The objective of this study was to evaluate the growth, the leaf composition and okra production in different spacing with and without biofertilizer. This research was carried out from October, 2012 to March, 2013, at the Federal University of Paraiba, Areia county, Paraiba State, Brazil. The experimental design was a...

Author(s): Juliete Araújo da Silva Nunes, Járisson Cavalcante Nunes, Jandiê Araújo da Silva, Ademar Pereira de Oliveira, Lourival Ferreira Cavalcante, Denizard Oresca and Ovídio Paulo Rodrigues da Silva

January 2018

Isolation, characterization and antibiotics susceptibility of β-glucuronidase producing Escherichia coli and other enteric bacteria from ground beef

The current work aimed to determine the prevalence of Escherichia coli in fresh ground beef purchased from butchers' shops in Suez Governorate, Egypt, and the antibiotics susceptibility pattern of the isolated bacteria. E. coli was isolated and detected on tryptone bile glucuronide agar (TBGA) plates as chromogenic selective medium for this species. The sensitivity and resistance of the isolated bacteria to...

Author(s): Abdel-Hamied M. Rasmey, Salha G. Desoki and Mohamed Deabes

January 2018

Inflorescence developmental polymorphism and its horticultural significance in plantain (Musa spp. AAB)

Inflorescence developmental polymorphism and its horticultural significance in plantain (Musa spp. AAB) was investigated in this study. The study was designed to evaluate the consistency of inflorescence dichotomy as well as the horticultural significance of the double and triple bunching plantain phenotypes during several production cycles. Four plantain accessions with different types of multiple bunches or...

Author(s): Norah Godwin Ekanem, and Ebiamadon Andi Brisibe,

January 2018

Response of four cultivars of cassava (Manihot esculenta Crantz) plantlets free of cassava mosaic virus to micropropagation in different media

The aim of this study was to identify the best medium for the micropropagation of four cultivars (Six-mois, M61/061, Yalipe and Rendre) of cassava (Manihot esculenta, Crantz) plantlets free of mosaic virus. The effect of media on the morphogenesis in vitro was studied using different growth regulators combinations, added to MS medium, M0: MS without growth regulator; M1: MS+NAA (0.02 mg/l) ; M2 : MS+BAP (0.05 mg/l); M3:...

Author(s): Simplice Prosper Yandia, Christophe Bernard Gandonou, Semballa Silla, Innocent Zinga and Fatiou Toukourou

December 2017

Plant cell suspension culture of Thevetia peruviana (Pers.) K. Schum. in shake flask and stirred tank reactor scale: A comparative study

The aim of this work was to evaluate the effect of changing the shake flask for a stirred-tank bench bioreactor on the performance of Thevetia peruviana cultures. Maximum cell growth of 18.59 and 8.46 g DW/L for shake flask and bench bioreactor at day 14 was obtained, respectively. The end of the exponential growth phase in shake flask was correlated with total sugar consumption, while this behavior was not observed in...

Author(s): Juan Pablo Arias, Karol Zapata, Benjamín Rojano, Mariana Peñuela and Mario Arias

December 2017

Chemical composition of neem and lavender essential oils and their antifungal activity against pathogenic fungi causing ginseng root rot

The aim of this study was to assess in vitro, the antifungal activity and characterize the chemical constituents of the essential oils of Azadirachta indica (neem) and Lavandula angustifolia (lavender).  The essential oils of A. indica and L. angustifolia plants were tested against several isolates of pathogenic fungal genera causing root rot disease of ginseng. Agar plate assay indicated that lavender oil at 10%...

Author(s): Khalid Abdallah Hussein, and Jin Ho Joo,

December 2017

Effects of Salaha-A (herbomineral drug) on blood parameters of rats and in silico inhibition of P-glycoprotein by it bioactive compounds

The drug under study is a herbomineral drug containing tortoise shell ash and ground seeds of Piper nigrum used in the treatment of cancer. Salaha-A was found to contain essential minerals that could have medicinal importance to human. Calcium was found to be the major element in the tortoise shell ash and piperine is the pioneer alkaloid found in Piper nigrum. This work evaluates the effects of Salaha-A at different...

Author(s): Rahma M. Adamu, Magaji G. Taura and Balwant K. Malik

December 2017

Changes observed in Pritchardia pacifica palms affected by a lethal yellowing-type disease in Mexico

Lethal yellowing (LY) is a devastating disease, affecting more than 35 palm species. One of them, Pritchardia pacifica, was found to be very susceptible in Florida and it is affected by a LY-type syndrome in Yucatan, Mexico. In this study, plants of P. pacifica were exposed naturally to feral insects in an area affected by LY in Mexico. All the plants exposed died showing symptoms of leaf decay with death occurring...

Author(s): María Narváez, Elizabeth Ortíz, Carmen Silverio, Jorge M. Santamaría, Francisco Espadas and Carlos Oropeza

December 2017

Trichoderma as biological control weapon against soil borne plant pathogens

The genus of Trichoderma is widely applied for the biocontrol of phytopathogenic fungi in agriculture sector. Moreover, Trichoderma species are also excessively exploited in different industrial purposes due to their production of important lytic enzymes such as chitinases, glucanases and proteases. Several genetic improvement trials are carried out for maximizing the role of Trichoderma as biological control agents via...

Author(s): Khalid S. Abdel-lateif,

December 2017

Overexpression of key enzymes of the 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway for improving squalene production in Escherichia coli

2-C-Methyl-D-erythritol-4-phosphate (MEP) pathway has been extensively employed for terpenoids biosynthesis in Escherichia coli. In this study, to obtain key-enzymes of MEP pathway for squalene production, overexpression of different combination of MEP pathway genes were compared. Squalene production in strain YSS12 with overexpressed dxs, idi and ispA of MEP pathway from E. coli was improved by 71-fold when compared...

Author(s): Haiyuan Liu, Shu Han, Liping Xie, Jie Pan, Wei Zhang, Guihua Gong and Youjia Hu

December 2017

Genetic and population diversity of bacuri (Platonia insignis Mart.) in Chapada Limpa extractive reserve, Maranhão State, Brazil

Landscape studies illustrate how the structure and configuration of ecological/agroecological zones influence the genetic diversity of a species. Thus, the aim of the present study is to assess how landscape structure and conservation influence the genetic diversity indices of Platonia insignis Mart. (bacuri) in Chapada Limpa Extractive Reserve, Chapadinha County, Maranhão State, Brazil. The study was carried out...

Author(s): Edyane Moraes dos SANTOS, Carlos Alberto de Sampaio MONTEIRO NETO, Claudio Adriano de Jesus NASCIMENTO, Francisca Helena MUNIZ and José de Ribamar Silva BARROS

December 2017

Evaluation of serum sialic acid and other risk factors in diabetes mellitus

The main cause of diabetes mellitus type 2 (DM2) is disturbed carbohydrate metabolism indicated by hyperglycemia. Insulin secretion is disturbed by inflammatory process in the body due to imbalanced diet, hormonal disturbance and genetics. The serum sialic acid has been investigated as a parameter to evaluate intensity of DM2. 200 individuals of both genders were included and were divided into four groups (50 each)...

Author(s): Saghir Ahmed Jafri, Khaleeq Ur Rehman, Nazia Ilyas, Abu Bakar Imran, Muhammad Qasim and Shazia Zahra,

December 2017

Anaerobic decomposition of submerged macrophytes in semiarid aquatic systems under different trophic states, Paraíba State, Brazil

The macrophytes play an important role in the regulation of biological and chemical processes in aquatic ecosystems, particularly in shallow lakes. They also play an important role in storage and nutrient cycling, serving as a source of organic matter to native environments. The aim of this study was to describe the kinetic aspects of the nutrients released during the anaerobic decomposition process of Egeria densa...

Author(s): Vanessa Virginia Barbosa, José Etham De Lucena Barbosa, Luiz Ubiratan Hepp, Marcela Bianchessi Cunha Santino and Janiele França Nery

December 2017

The impact of over-expression of NPK1 gene on growth and yield of sorghum under drought stress

Sorghum bicolor L. is an important crop in many tropical regions, yet it has received little attention in applying modern biotechnologies for improvement due to transformation difficulties. Drought is among the most important factors limiting sorghum productivity. The Nicotina Protein Kinase 1 (NPK1) gene confers tolerance to adverse environmental conditions. The present work was conducted to determine the amenability...

Author(s): Shireen K. Assem, Mohamed M. Zamzam, Mohamed E. Saad, Basita A. Hussein and Ebtissam H. A. Hussein

December 2017

Peroxidase and polyphenol oxidase activities associated to somatic embryogenesis potential in an elite hybrid genotype of Theobroma cacao L.

Cross-fertilization and somatic embryogenesis stand as potential useful tools for genetic improvement and vulgarization of agronomical interesting cocoa planting material for sustainable cocoa culture. Manual cross-fertilization (♀SNK13×♂UPA143) was conducted. ♀SNK13×♂UPA143 derived hybrid genotypes were tested for their susceptibility to black pods disease (BPD). The most tolerant hybrid genotype (KHACa12)...

Author(s): Minyaka Emile, Niemenak Nicolas, Ngangue Latta Tanguy Armand, Madina Banen  Colette Vanessa,  Bahoya Joseph Aime and Omokolo Ndoumou  Denis

December 2017

Evaluation of productivity of sweet potato genotypes for first and second generation bioethanol production

The increased supply of ethanol fuel and its spread as an alternative to fossil fuels depend on the exploration of biomasses that can be regarded as alternatives to sugarcane and maize. In this study, the agricultural productivity and the potential for production of ethanol from roots and the aerial portion of twenty sweet potato genotypes were evaluated. The roots and branches were harvested 180 days after planting....

Author(s): Daniel José Silva Viana, Silvânia Saldanha da Silva Pinto, Karen Paola Fróes Dias, David Lee Nelson, Lílian de Araújo Pantoja, Nísia Andrade Villela Dessimoni Pinto, Valter Carvalho de Andrade Junior and Alexandre Soares dos Santos

November 2017

Comparative biosorption of Pb2+ ions from aqueous solution using Moringa oleifera plant parts: Equilibrium, kinetics and thermodynamic studies

This research article presents a comparative study of the adsorption properties of Moringa oleifera biomass using Pb2+ ions as test analyte. The investigated parameters which affected the adsorption process were the effect of pH, initial concentration, adsorbent dose, contact time, and temperature. The comparison of adsorption process was evaluated in the pH range of 3 to 8, concentration range from 5 to 20 ppm,...

Author(s): Stephen Nyoni, Edmore Satiya, Netai Mukaratirwa-Muchanyereyi and Munyaradzi Shumba

November 2017

Variability of seed oil content and fatty acid composition in Shantung maple (Acer truncatum Bunge) germplasm for optimal biodiesel production

Shantung maple seed oil methyl esters have emerged as the potential feedstock for producing biodiesel. The goal of this work was to assess variations in seed oil content and fatty acid compositions for optimal biodiesel production among 138 Shantung maple accessions native to 14 regions of China. Dramatic differences in seed oil content were observed among trees grown in the various regions tested; seeds of trees grown...

Author(s): Qian Qiao#, Mei-Jing Ye#, Fen-Fen Si, Hong-Jian Ren, Kai An, Zhen Feng, Lin Zhang and Zhong-Kui Sun

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