Alleviation of salinity stress in chickpea byRhizobium inoculation or nitrate supply
Influence of inoculation with efficient rhizobia or nitrate fertilization in alleviating salinity (NaCl, CaCl2 and Na2SO4) stress was investigated in sand culture experiments. Shoot dry mass declined beyond salinity level corresponding to electrical conductivity (EC) 5.6 dS m−1 in control or in inoculated plants and after EC 7.4 dS m−1 in nitrate fed ones. Root growth was more sensitive and decreased at EC 3.3 dS m−1. Nitrate reductase activity in leaves reduced at EC 3.3 dS m−1 but in inoculated and nitrate fed plants it reduced at EC 5.6 dS m−1. Na+ accumulation increased at EC 5.6 and 7.4 dS m−1 in roots and, shoots, respectively. In inoculated and nitrate fed plants Na+ content in roots increased at EC 7.4 dS m−1. Content of Ca2+ increased slightly only in shoots and content of K+ was unaffected. Besides inoculation, application of small doses of nitrogen should prove beneficial for legume cultivation in saline soils.
Key wordsCicer arietinum ion accumulation nitrate reductase activity
days after seeding
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