Record ID No. |
3744 |
Author(s) |
Garg, N., Singla, P. , 2012 |
Affiliation |
Department of Botany, Panjab University, Chandigarh 160014, India |
Title |
The role of Glomus mosseae on key physiological and biochemical parameters of pea plants grown in arsenic contaminated soil |
Source. Vol.(no):Page |
Scientia Horticulturae, 143(August): 92-101p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Pollution |
Sub-subjects |
Soil pollution |
Host |
Pisum sativum |
Organism |
Glomus mosseae |
Country |
India, South Asia |
Abstracts |
Arbuscular mycorrhiza (AM) constitutes a key functional group of soil biota that can greatly contribute to ecosystem sustainability by playing a critical role in stress tolerance. The effects of arsenic (As) stress on physiological and biochemical mechanisms and the role of Glomus mosseae (AM) in reducing As accumulation was investigated in Pisum sativum L. (pea). As uptake and accumulation increased with an increase in external As concentration, increment being higher in roots than in shoots. Sodium arsenate significantly affected shoot and root dry matter yield, damaged chlorophyll pigments and induced oxidative stress by decreasing membrane stability and increasing H2O2 production in a concentration dependent manner. The phytotoxicity of arsenate (AsV) led to an increase in superoxide dismutase, catalase and peroxidase activities and synthesis of osmolytes such as soluble sugars, proline, glycine betaine and total proteins. Establishment of association with G. mosseae reduced As(V) uptake and increased N, P, K+ as well as plant growth. AM inoculations alleviated As(V) toxicity by reducing oxidative stress and modulating antioxidative mechanisms in pea plants.Arsenate (AsV) affected plant biomass, shoots being more affected than roots. Arsenic contents were higher in roots than shoots. Arsenate induced oxidative stress, membrane instability and increased H2O2 production. SOD, CAT, POD activities and synthesis of osmolytes increased under As(V) stress. AM alleviated As(V) stress by arresting its uptake by roots and modulating antioxidants.
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