Evelin, Heikham , Kapoor, Rupam , Giri, Bhoopander .
Mitigation of salinity stress in Trigonella foenum-graecum L. plants colonized by arbuscular mycorrhizal fungus, Glomus intraradices Schenck and Smith.
Arbuscular mycorrhizal (AM) fungi are widely distributed in nature. These fungi are commonly prevailing in the salt-affected soils. They develop symbiotic relationship with the roots of their host plants. AM fungi play a vital role in maintaining plant water relations, mineral nutrient acquisition, soil quality and the productivity of plant under saline conditions. An experiment was conducted to understand the effect of Glomus intraradices Schenck and Smith on Trigonella foenum-graecum under salt stress condition imposed by using 0, 50, 100 and 200 mM of NaCl. Present study revealed that greater nutrient acquisition in mycorrhizal plants resulted in improved growth and biomass production as compared to nonmycorrhizal plants. In mycorrhizal plants, the concentrations of Cu, Fe and Zn2+ decreased as the levels of salinity increased, however, at each salinity level, mycorrhizal plants had higher concentration of Cu, Fe,Mn2+ and Zn2+ as compared to nonmycorrhizal plants. AM fungal inoculation of fenugreek showed higher accumulation of chlorophyll a, b and carotenoids than that of the uninoculated plants. Mycorrhizal plants maintained favorable K+: Na+, Ca2+: Na+and Ca2+: Mg2+ ratios in the plant tissues. Glomus intraradices prevented excess uptake of Na+ in root or shoot tissues as the levels of salinity increase in soil. In the present study, higher accumulation of osmoprotectants and lower accumulation of MDA in the leaves of mycorrhizal plants suggested that AM fungi reduced adverse effects of salt stress on fenugreek plants under saline condition. Further, maintenance of membrane integrity and osmotic adjustment, and prevention of oxidative damage in mycorrhizal plants substantiate the potential of AMF in alleviation of salt stress.
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1 - University of Delhi, Department of Botany, Delhi, Delhi, New Delhi, 110007, India
2 - Swami Shraddhanad College, University of Delhi, Department of Botany, Alipur, Delhi, Delhi, Delhi, 110036, India
Presentation Type: Oral Paper:Papers for Sections
Location: Union C/Hyatt
Date: Monday, July 9th, 2012
Time: 1:45 PM