Effect of nitric oxide on concentration of intracellular free Ca2+ in transgenic Arabidopsis thalianaplants during oxidative stress

Abstract

In recent years exogenous NO was shown to (i) influence plant growth and development, (ii) take part in the response of plants to pathogens, light and ABA-induced stomatal closure, and (iii) reduce consequences of oxidative stress generated by treatment with herbicides [1-4]. It is also known that a number of chemical and physical stimuli, including oxidative stress, mediates their effects via transient increases in the concentration of intracellular free Ca2+([Ca2+]cyt). Therefore, the aim of our work was to study the influence of exogenous NO on the increase of [Ca2+]cyt induced by oxidative stress in plant cells with changes in [Ca2+]cyt during oxidative stress being measured in Arabidopsis thaliana seedlings transformed to express apoaequorin.