Institute of Molecular Biology and Biotechnologies, Azerbaijan National Academy of Sciences
Plants are quite tolerant to the effects of oxidative stress formed due to adverse environmental conditions. It is attributed to strong defense mechanisms of plant cells. The complex multi-component antioxidant defense system (AOS) consists of low-molecular weight nonenzymatic antioxidant substances and high-molecular weight nonenzymatic enzymes. Nonenzymatic system is more complex and multifaceted. These substances express direct or indirect antioxidant effects as membrane-protectors, chaperones, signal-regulating compounds.