Mesquite (Prosopis juliflora DC.) has stimulatory effect on nitrate reductase activity in rice seedlings
Journal Title: Journal of Experimental Biology and Agricultural Sciences - Year 2016, Vol 4, Issue 0
Abstract
Prosopis juliflora is an invasive and allelopathic plant widespread in most parts of the world. P. juliflora is known to influence the growth of plants growing in its vicinity by the release of the allelochemicals during the decomposition of its litter. The negative effect is manifested by inhibition of the various physiological processes of the target plants. In the present study the effect of aqueous leaf extract of P. juliflora on the nitrogen metabolism of rice seedlings was assessed through the means of estimation of nitrate reductase (NR) activity of rice seedlings. For the study, aqueous leaf extract of dry mature leaves was prepared. From this, three concentrations viz., 1%, 10%, and 25% of the leaf extract were prepared by diluting with distilled water, while distilled water served as control. Rice seeds were incubated in different concentrations of extract for 10 days. Germination data was recorded and used for calculating the germination indices. After 10 days of exposure to the extract, seedlings were harvested and measurements for root and shoot length, fresh weights of root, shoot, and seed was taken and nitrate reductase activity of the seedlings was assayed. Germination and phenotypic results showed no negative affect by the extract. The activity of NR significantly increased with increase in the concentration of the extract. Our study revealed that the activity of NR was promoted by the extract addition.
Authors and Affiliations
Gowsiya Shaik, Santosh Kumar Mehar
Keywords
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