Cadmium stress-induced oxidative stress and role of nitric oxide in rice (Oryza sativa L.)

Abstract

Cadmium (Cd) is a potential environmental phytotoxicant. The generation of reactive oxygen species (ROS) due to Cd stress is responsible for the induction of oxidative stress in plants. On the other hand, SNP, a NO donor is known to have effect on Cd-induced oxidative stress in plants. We evaluated the effect of NO on the regulation of Cd stress in the rice (Oryza sativa L.) variety MSE-9. Cd treatment was given in the form of 50, 100 and 200 lM, whereas for interaction study, 100 lM of Cd and 100 lM of SNP were used. The result showed that Cd-induced oxidative stress in MSE-9 by generating ROS. However, when SNP was given with Cd stress, it was seen that SNP treatment regulated the stress metabolism in rice seedlings under Cd toxicity by generating NO. It can be said that the SNP in combination with Cd treatment might possess the way to protect rice seedlings under Cd stress.

Interactive effects of nitric oxide and glutathione in mitigating copper toxicity of rice (Oryza sativaL.) seedlings

“…6 Similar to our findings, exogenous NO and GSH were also found to counteract a Cd-induced increase in GSH content in rice cultivars. 24,25 Reduced Pro content by SNP has also been reported in canola plants under Ni stress. 26 GSH-and SNPCGSH-supplemented seedlings showed greater reduction in Pro content than with SNP alone, indicating these seedlings suffered from less stress.…”

Study of interaction effect between triacontanol and nitric oxide on alleviating of oxidative stress arsenic toxicity in coriander seedlings

“…As an antioxidant, NO could directly quench the ROS and modulates various cellular physiological processes to limit oxidative injury . NO supplied exogenously provides resistance against stress induced by HMs like Cd in rice (Panda et al 2011) and As in fescue (Jin et al 2010). There is some evidence that the exogenous application of TRIA inhibited lipid peroxidation in spinach and peanut plants' (Ramanarayan et al 2000;Verma et al 2011) leaves and improved membrane integrity by differentially modulating membrane lipid composition (Swamy et al 2009).…”

“…Evidence has been obtained for the involvement of NO in plant growth and development, as well as in defense responses (Lamattina et al 2003;Yu et al 2005). Recently, an increasing number of articles have reported the effects of exogenous NO on alleviating HM toxicity in various plants (Jin et al 2010;Xiong et al 2010;Panda et al 2011). Evidence has been obtained for the relation of NO and plant growth regulators (Palavan-Unsal & Arisan 2009;Yadav et al 2011;Shen et al 2013).…”

Interaction effects of nitric oxideand salicylic acid in alleviating salt stress of Gossypium hirsutum L.

“…Its chemical properties make NO a versatile signal molecule that functions through the interactions with cellular targets via either redox or additive chemistry (Lamattina et al, 2003). Undoubtedly, there are many studies show that NO itself is the plant signaling molecule, and today it is known to play a crucial role in regulating many key physiological processes in different plants, such as in rice, cucumber, mung bean and so on (Panda et al, 2011). Various mechanisms contribute to NO-induced increase of salt tolerance.…”

“…First, NO might be involved in increasing the antioxidant content and antioxidant enzyme activity to scavenge ROS. Second, NO might increase risk element accumulation in root cell walls and decrease the risk element accumulation in the soluble cell fraction to maintain the cellular redox homeostasis and regulation of the leaves (Panda et al, 2011;Manai et al 2014). Finally, NO could function as a signaling molecule in the cascade of events leading to changes in gene expression under risk element stress (Xiong et al, 2009 (Panda et al, 2011) and also contents.…”