NDLI: Evidences for suppression of cadmium induced oxidative stress in presence of sulphosalicylic acid in rice seedlings

Content Provider	Springer Nature Link
Author	Singh, Indra Shah, Kavita
Copyright Year	2015
Abstract	Role of salicylic acid in plants grown under metal contaminated soil is not yet understood. To investigate if signaling by Cd-induced H2O2 or SA, collide or integrate, rice cv. HUR3022, grown for 3, 7 and 10 day under 50 µM Cd/SA alone or in combination were studied. Dynamic distribution of Cd2+ and SA, cell viability, time-dependent changes in H2O2 levels, free proline, chlorophyll, ascorbate and glutathione pools and altered antioxidant enzymes in roots/shoots of rice were observed. Exogenous SA decelerated cell-death in Cd-stressed rice playing a positive role in protection against injury. Cd led to elevated activities of superoxide dismutase, ascorbate peroxidase, guaiacol peroxidase and phenylalanine ammonia lyase and lowered catalase and glutathione reductase activities in roots and shoots of rice seedlings. By contrast, SA + Cd2+ reversed the trend of enzyme activities, levels of non-enzymatic antioxidants and GSH in roots/shoots suggesting alleviation of Cd-induced oxidative damage in rice. Suppression of Cd-uptake in presence of SA suggest an epistatic effect of SA-signal over Cd-induced ROS-signal in rice roots. No additive effects of SA or H2O2 signals were noted in Cd-stressed rice. Results indicate integration of different signals and SA-enhanced Cd2+ tolerance due to SA-regulated Cd2+ uptake as well as the SA-elevated enzymatic and non-enzymatic antioxidant pool in rice.Role of salicylic acid in rice plants grown under Cd-contaminated soil was studied. Cd-induced H2O2 or SA, signals both collide and/or integrate. Dynamic distribution of Cd2+ and SA, cell viability, time-dependent changes in H2O2 levels, free proline, chlorophyll, ascorbate and glutathione pools appear. Suppression of Cd-uptake in presence of SA were noted. Integration of different signals, SA-induced Cd2+ tolerance and SA-elevated enzymatic and non-enzymatic antioxidant pool in rice was observed.
Starting Page	99
Ending Page	110
Page Count	12
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	76
Issue Number	1
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-01-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antioxidant Cadmium Oxidative stress Rice Salicylic acid Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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