January 2008
Impact of vesicular arbuscular mycorrhiza on root anatomy in Zea mays and Lycopersicon esculentum
The absorption of water and nutrient ions from the soil solution is among the primary roles of roots. To reach the xylem for axial transport, the water and minerals must circumvent the exodermis and (or) endodermis, both of which act as barriers to radial apoplastic diffusion. To do this, the water and minerals must enter the symplast of cells located outside of the outermost apoplastic barrier. Mycorrhiza are...
January 2008
Influence of malting time on α and β Amylases secretions in Nigerian Amylolytic maize Cultivars
Screening for alpha and beta Amylases were carried out in one hundred malted Nigerian maize cultivars. The trend of secretions of alpha and beta amylases was observed for eleven day germination period. Results obtained showed that third to fifth day germination periods could be taken as optimum periods for Amylolytic activities. Hence overall malt from 9071 and TZE COMP4C2 varieties were the most α Amylolytic...
January 2008
Manure placement effects on root and shoot growth and nutrient uptake of ‘PITA 14’ Plantain hybrid (Musa sp. AAAB)
Low soil organic matter and associated poor soil fertility cause yield decline in Musaspecies, necessitating external nutrient input to maintain yield. Best fertilization practices include applying the correct fertilizer at the correct rate, time and place. In this regard, manure placement effects on growth, root system development and nutrient uptake of a plantain hybrid were evaluated in a screen-house. Three...
January 2008
Highly client-oriented breeding with farmer participation in the Ethiopian cereal tef [Eragrostis tef (Zucc.) Trotter]
This paper describes a highly client-oriented breeding applied to enhance the development and release of a tef (Eragrostis tef) variety with farmer participation in Ethiopia. The main features include; clear objective, target cross, early-stage researcher selection, multi-location yield trial, farmer on-station selection, judicious selection of few candidate varieties based on farmers' and researchers'...
January 2008
Effects of light colour and oscillator frequency on earthworm bioactivity
An experiment was conducted at the Zoology Laboratory of the Olabisi Onabanjo University, Nigeria to evaluate the suitability of different light colours. Being generated from 15-watt, low-heat, or frequency-generated flourescent tubes as stimulants to enhance, major cast productivity of the earthworm species Hyperiodrilus africanus. The aim was to determine if exposure to the different light colours would improve...
January 2008
Effect of rotation of cowpea (Vigna unguiculata) with fonio (Digitaria exilis) and millet (Pennisetum glaucum) on Macrophomina phaseolina densities and cowpea yield
Macrophomina phaseolina, the causal agent of charcoal rot, causes great damage to cowpea in the Sahel. One of the few options to manage the disease is by cropping nonhosts that may reduce the soil inoculum below a damage threshold level. To test this, fonio (Digitaria exilis) and millet (Pennisetum glaucum) were cropped continuously for 3 years in plots with a natural infestation of 24 - 53...
January 2008
Response of some lowland growing sorghum (Sorghum bicolor L. Moench) accessions to salt stress during germination and seedling growth
This research aimed to investigate the response of some lowland growing sorghum (Sorghum bicolor L. Moench) accessions to salt stress during germination and seedling growth. Twenty lowland sorghum (S. bicolor L. Moench.) accessions were tested during germination and seedling stage at 0, 2, 4, 8 and 16 dS/m salinity levels. Data analysis was carried out using jmp5 (version 5.0) statistical software. Final germination...
January 2008
Cassava production and processing characteristics in southern Cameroon: An analysis of factors causing variations in practices between farmers using Principal Component Analysis (PCA)
A questionnaire-based survey study was carried out during a 3 month period, from January to April 1998, in 45 villages belonging to three locations (Yaoundé, Mbalmayo, and Ebolowa) of southern Cameroon. The survey was aimed at collecting constraints and processing practices related information from farmers growing cassava and transforming it into chips. Information in the questionnaire contained some...
January 2008
Life history of the Potato Psyllid Bactericera cockerelli (Homoptera: Psyllidae) in Controlled Environment agriculture in Arizona
The life history parameters were studied for a western isolate of Bactericera cockerelli(Sulc) from a southern Arizona commercial tomato greenhouse (AZ - 06) during 2006. Life history parameters were determined at 26 - 27°C and 60 - 70% humidity, with a 12:12 day/night cycle. The mean pre-mating period was 4.2 days, with a range of 3.8 – 5 days, and the mean pre-oviposition period was...
January 2008
Evaluation of slow-release nitrogen and potassium fertilizers for cotton production
Current nitrogen (N) and potassium (K) fertilization involves the use of conventional fertilizer materials with little information on the use of slow release materials. The objectives of this research were to evaluate new programmed slow-release N and K fertilizers for cotton production. Field experiments were conducted in 1997 and 1998 in Tennessee and Arkansas in the USA. The applied nutrient rates were a percentage...
January 2008
Conservation studies on Telfairia occidentalis Hook .F. A. indigenous plant used in enthnomedicinal treatment of anemia in Nigeria
Optimum ways of conserving Telfairia occidentalis due to its usefulness to mankind was the basis of this study. Its seed viability potential, seed germination, seedling growth, mean number of seeds per fruit and effect of fruit extract on seed germination were investigated. One hundred percent seed viability was observed inside the fruit, the mean number of seeds per fruit was 71.5. The effect of fruit extract...
January 2008
Molecular identification of MIP genes expressed in the roots of an arbuscular mycorrhizal Trifolium alexandrium L. under water stress
Arbuscular mycorrhizal fungi which develop a mutualistic symbiotic relationship with most land plants can improve plant resistance under water stress conditions. Moreover, it is known that the water channel proteins (MIP genes) act as water transporting systems in plants. In order to determine the effect of these fungi on the expression these MIP genes under drought stress, expressed MIP in both mycorrhizal and...
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