Role Of Bioregulator On Proline, Proteins And Soluble Sugar Accumulation In Organs Of Okra Under Salinity Stress

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Role Of Bioregulator On Proline, Proteins And Soluble Sugar Accumulation In Organs Of Okra Under Salinity Stress

Journal Title: IOSR Journal of Pharmacy and Biological Sciences (IOSR-JPBS) - Year 2016, Vol 11, Issue 3

Abstract

Okra is an important vegetable grown in tropical and sub-tropical regions. Here, we study its response to salinity stress. Seeds of 47-4 and LD88 genotypes were pre-soaked with indole acetic acid (0.4, 0.5 and 0.6mM) and control in distilled water. The seeds were grown in polyethylene bags under different levels of salinity (50, 100, 150 and 200 mMNaCl).Experiment was conducted to study the interactive effect of salinity and bioregulator on growth and accumulation of solutes (proline, salt stress proteins and soluble sugar). Salinity stress in all levels increased proline content in the two genotypes in increasing order in the absence of indole acetic acid.Values of soluble sugars and salt stress proteins were decreased by severe salt stress in the organs of the two genotypes whileinteractions of salinity with IAA treatments particularly at 0.4 and 0.5 mM modulate the negative effect on the plants and improved these values as compared to treated control group. However, in the two studied organs of stressed okra, fruit showed more soluble sugar accumulation than leaf in both genotypes. Thus, it is of noteworthy that indole acetic acid treatments at 0.4 and 0.5 mM serve as promising concentrations to alleviate the effects of salinity stress on okra plant, which may be due to reduction in reactive oxygen species at those concentrations. IAA could also be used to enhance plant growth as well as accumulation of non-toxic metabolites particularly under mild and moderate salinity levels.

Authors and Affiliations

Esan A. M, OlaiyaC. O1

Keywords

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EP ID EP384514
DOI 10.9790/3008-1103022634
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