THE VARIABILITY OF METABOLIC PROCESSES IN THE WHEAT PLANTS UNDER STRESS CONDITIONS

Abstract

The purpose of research - to study the influence of negative factors (low and high temperature, salinity, chemical stress) on the content of amino acids and the enzyme peroxidase in wheat leaves. The object of investigation used a five-day seedlings of winter wheat varieties of basalt, which were exposed to the stress: low temperature (-3 ... -5 ° C); high temperature (33 ... 35 ° C); salinity (5% solution of NaCl); chemical stress (soil extract heavy metals). It is found that chemical stress response of plants caused maximal accumulation of amino acids: proline, isoleucine, serine, methionine, aspartic acid and lysine. At the same time, free amino acids such as alanine, phenylalanine, gistadin, valine, leucine and tyrosine active reaction to stress effects are not exhibited. Peroxidase enzyme also varies under the influence of all the species studied stress. Moreover, the most significant change in the overall activity recorded on a wheat plant chemical stress. Less than an active response to the stressful effects observed at low temperature and salinity using indicators accumulation of free amino acids and the enzyme peroxidase in vegetative organs can serve as an estimate depth of stress on the plant, which allows to estimate the frost, drought resistance, heat resistance, salt tolerance and resistance to the toxic effects of heavy metals.