Influence of Seed Treatment with Salicylic Acid on Growth, Antioxidant Enzyme Activity, and Proline Content in Wheat Leaves at Excessive Zinc Level in the External Environment
A. A. Ignatenko, I. A. Nilova, N. M. Kaznina, A. F. Titov
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引用次数: 0
Abstract
We studied the effect of seed treatment with salicylic acid (SA, 100 μM) on seed germination, growth, the level of lipid peroxidation (LPO), and the functioning of a number of components of the antioxidant system in wheat plants (Triticum aestivum L.) Zlata variety grown with optimal (2 μM) or excess (1500 µM) zinc content in the root environment. It has been shown that excess zinc has an inhibitory effect on root and shoot growth and also enhances the accumulation of one of the indicators of LPO development: malondialdehyde (MDA). At the same time, the structural integrity of the membranes was maintained, as indicated by the absence of changes in membrane permeability, recorded by the yield of electrolytes. The activity of antioxidant enzymes, superoxide dismutase (SOD) and catalase (CAT), did not change under these conditions, but the activity of guaiacol-specific peroxidase (GPO) decreased. Treatment of seeds with SA at a concentration of 100 μM, which stimulates their germination, enhanced the negative effect of excess zinc on growth performance and MDA accumulation in wheat leaves. However, in this case, the yield of electrolytes did not increase, which is presumably due to an increase in the activity of SOD and GPO. Based on the data presented in the work and previously obtained, as well as an analysis of the literature, it was concluded that the response of plants to excess zinc in the external environment, like the reaction to other abiotic stresses, is not only multicomponent and multiechelon but also variable, depending on many factors and circumstances: the dose of exposure (zinc concentration and duration of its action), biological characteristics of the plant species (variety), their age condition, etc. Treatment of seeds with SA can change the nature of the plant’s response to the action of excess zinc, and the direction of these changes will, in turn, depend on the concentration of SA, the duration of its action, and the method of treatment.
期刊介绍：
Russian Journal of Plant Physiology is a leading journal in phytophysiology. It embraces the full spectrum of plant physiology and brings together the related aspects of biophysics, biochemistry, cytology, anatomy, genetics, etc. The journal publishes experimental and theoretical articles, reviews, short communications, and descriptions of new methods. Some issues cover special problems of plant physiology, thus presenting collections of articles and providing information in rapidly growing fields. The editorial board is highly interested in publishing research from all countries and accepts manuscripts in English.
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