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- Title
Enhanced Resistance of Pea Plants to Oxidative Stress Caused by Paraquat during Colonization by Aerobic Methylobacteria.
- Authors
Agafonova, N.; Doronina, N.; Trotsenko, Yu.
- Abstract
The influence of colonization of the pea ( Pisum sativum L.) by aerobic methylobacteria of five different species ( Methylophilus flavus Ship, Methylobacterium extorquens G10, Methylobacillus arboreus Iva, Methylopila musalis MUSA, Methylopila turkiensis Side1) on plant resistance to paraquat-induced stresses has been studied. The normal conditions of pea colonization by methylobacteria were characterized by a decrease in the activity of antioxidant enzymes (superoxide dismutase, catalase, and peroxidases) and in the concentrations of endogenous HO, proline, and malonic dialdehyde, which is a product of lipid peroxidation and indicator of damage to plant cell membranes, and an increase in the activity of the photosynthetic apparatus (the content of chlorophylls а, b and carotenoids). In the presence of paraquat, the colonized plants had higher activities of antioxidant enzymes, stable photosynthetic indices, and a less intensive accumulation of the products of lipid peroxidation as compared to noncolonized plants. Thus, colonization by methylobacteria considerably increased the adaptive protection of pea plants to the paraquat-induced oxidative stress.
- Subjects
ENDOPHYTES; OXIDATIVE stress; OXIDATION-reduction reaction; COLONIZATION; HERBICIDES
- Publication
Applied Biochemistry & Microbiology, 2016, Vol 52, Issue 2, p199
- ISSN
0003-6838
- Publication type
Article
- DOI
10.1134/S0003683816020022