November 2012
Understanding epigenetic effects in crop species
Epigenetics, which generally refers to beyond genetics, began to attract the attention of plant geneticits principally due to many biological phenomena that deviate from basic evolutionary rules and trends. Several studies past and present have attributed gene expression including both qualitative and environmentally influenced morphological changes in plants and crop species to epigenetic related activities such as DNA...
November 2012
Effect of pre-treatments on the germination and early seedlings growth of Acacia auriculiformis Cunn. Ex. Benth
Acacia auriculiformis Cunn. Ex. Benth is a multipurpose wattle tree with diverse environmental and ecological significance. However, seeds dormancy and low germination percentage are problems for its use in agro-forestry practices. Investigations were carried out on the effect of pre - treatment on the germination and early seedlings growth of A. auriculiformis. Germination were observed in seeds pre-treated...
November 2012
Tissue culture regeneration of three Nigerian cultivars of tomatoes
The in-vitro response of three Nigerian cultivars of tomato - Ibadan local (IbL), Ife and JM94/46 (JM) - were tested using cotyledons as explants for direct shoot regeneration. The cultivars showed variable responses in the two media used. In the medium consisting of an initial culture on pre-culture medium made up of Murashige and Skoog (MS) with 1.0 mg L-1 naphthaleneacetic acid...
November 2012
Role of nitric oxide in saline stress: Implications on nitrogen metabolism
The present work is focused on the possible relationship between nitric oxide and the induction of nitrogen metabolism in response to salt stress. The plants were subjected to 100 mM NaCl and sodium nitrite (NaNO2) or sodium nitroprusside (SNP) as the NO donor. On one hand, plants showed lower Na+ and Cl- accumulation after application of SNP or NaNO2 together with the NaCl treatment in leaves and roots...
November 2012
Influence of nutritional media and photoperiods on in vitro asymbiotic seed germination and seedling development of Dendrobium aqueum Lindley
Dendrobium aqueum Lindley is an epiphytic orchid decreasing in nature owing to environmental disturbance and inherent lower germination rates of mature seeds. To conserve this species, in vitro asymbiotic media and photoperiod screening were experimented. Twenty asymbiotic orchid seed germination media were examined to get the optimal medium for germination and seedling development under 16/8 hrs...
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