chapter  12
36 Pages

Plant Growth and Development Regulators and their Effect on the Functional State of Mitochondria

WithIrina V. Zhigacheva, Elena B. Burlakova

This chapter discusses the problem of the protection of plant cells from oxidative stress and possible mechanisms to reduce the generation of reactive oxygen species by plant mitochondria in these conditions. Throughout the process of vegetation, the plants exposed to action not one but multiple stressful environmental factors. The plants, unlike animals, are not able to escape or hide themselves from the action of a stress factor. Cell protection of plants from excessive production of reactive oxygen species (ROS) often occurs owing to a change in the energetics of mitochondria: synthesis of cold shock proteins and HSPs, uncoupling of oxidative phosphorylation with fatty acids. Electrons transfer via path with alternative oxidase (AOX) does not involve the synthesis of ATP (adenosine triphosphate). The importance of this pathway is in competition with auto-oxidation of the carriers with the formation of ROS. The plant growth regulator is an extensive group of natural organic compounds that in small doses affect metabolism of higher plants.