Metal uptake, oxidative metabolism, and mycorrhization in pigeonpea and pea under arsenic and cadmium stress

Authors : Neera GARG, Priyanka SINGLA, Purnima BHANDARI

Pages : 234-250

Doi:10.3906/tar-1406-121

View : 14 | Download : 9

Publication Date : 2015-04-01

Article Type : Research Paper

Abstract :Presence of arsenic insert ignore into journalissuearticles values(As); and cadmium insert ignore into journalissuearticles values(Cd); at elevated levels in the soils is threatening agricultural productivity. Arbuscular mycorrhizae insert ignore into journalissuearticles values(AM); enhance plant resistance to metalinsert ignore into journalissuearticles values(loid);s by sequestering them into roots, thus restricting their translocation into leaves. The present study evaluated differential responses of AM-colonized Cajanus cajan and Pisum sativum plants to As and Cd uptake and oxidative metabolism under As and Cd stress insert ignore into journalissuearticles values(0, 30, and 60 mg kg-1);. Arsenic uptake was significantly higher than Cd uptake, which caused greater growth inhibitions and induced oxidative stress. Pea was more sensitive, with higher toxicity symptoms in roots than leaves. Mycorrhizae were tolerant to metal toxicity and formed stronger association with the roots of pigeonpea than pea. However, mycorrhization arrested metalinsert ignore into journalissuearticles values(loid); uptake, reduced oxidative stress, and strengthened antioxidant enzyme activities. Stronger antioxidant enzyme activity and mycorrhizal symbiosis in pigeonpea when compared with pea could explain the differences in their metalinsert ignore into journalissuearticles values(loid); tolerance.
Keywords : Arsenic, cadmium, Cajanus cajan, mycorrhizal frequency, Pisum sativum