Articles liés à Arsenic Tolerance and Susceptibility Mechanism in Rice...

Arsenic Tolerance and Susceptibility Mechanism in Rice Plants - Couverture souple

Tripathi, Preeti; Singh, Rana Pratap; Tripathi, Rudra Deo

 
9783659471827: Arsenic Tolerance and Susceptibility Mechanism in Rice Plants
Couverture souple
ISBN 10 : 3659471828 ISBN 13 : 9783659471827
Editeur : LAP LAMBERT Academic Publishing, 2015

Synopsis

Arsenic (As) contamination of paddy rice in South and South-East Asia has raised much concern as rice is the subsidence diet for millions. The mechanism of As tolerance was investigated on contrasting rice genotypes, selected for As tolerance and accumulation. The rice genotypes responded differentially under arsenate [As(V)] and arsenite [As(III)] stress in terms of gene expression, antioxidant defence and thiol metabolic pathway. Arsenic induced oxidative stress was more pronounced in sensitive rice, while most of antioxidant enzymes, amino acids, thiolic content and their biosynthesis enzymes, related gene expressions increased significantly in tolerant rice in contrast to sensitive rice. Silicon supplementation significantly ameliorates As induced oxidative stress in tolerant rice by lowering the As level and improving antioxidant enzymes and their isozymes compared to sensitive rice. The study suggests that diminution of antioxidative defense system and thiol metabolic pathway leads As sensitivity, while coordinated response of thiolic ligands and stress responsive amino acids seems play role for As tolerance in rice to achieve the effective complexation of As.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

Arsenic (As) contamination of paddy rice in South and South-East Asia has raised much concern as rice is the subsidence diet for millions. The mechanism of As tolerance was investigated on contrasting rice genotypes, selected for As tolerance and accumulation. The rice genotypes responded differentially under arsenate [As(V)] and arsenite [As(III)] stress in terms of gene expression, antioxidant defence and thiol metabolic pathway. Arsenic induced oxidative stress was more pronounced in sensitive rice, while most of antioxidant enzymes, amino acids, thiolic content and their biosynthesis enzymes, related gene expressions increased significantly in tolerant rice in contrast to sensitive rice. Silicon supplementation significantly ameliorates As induced oxidative stress in tolerant rice by lowering the As level and improving antioxidant enzymes and their isozymes compared to sensitive rice. The study suggests that diminution of antioxidative defense system and thiol metabolic pathway leads As sensitivity, while coordinated response of thiolic ligands and stress responsive amino acids seems play role for As tolerance in rice to achieve the effective complexation of As.

Biographie de l'auteur

Dr. Preeti Tripathi (M.Sc., Ph.D., Environmental Science) is presently working as Dr D.S. Kothari Postdoctoral Fellow in Lucknow University, Lucknow, India. She has published her research findings in peer reviewed journals. Her research interests include arsenic tolerance & detoxification mechanism & bioremediation of heavy metals in soil & plant.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2015
Langue
anglais
ISBN 10 
3659471828
ISBN 13 
9783659471827
Reliure
Broché
Nombre de pages
256
Coordonnées du fabricant
non disponible
Personne responsable
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