full text (pdf)
DETERMINATION OF FRUIT PLANTS STABILITY TO ACID STRESS
Original title
ОПРЕДЕЛЕНИЕ УСТОЙЧИВОСТИ ПЛОДОВЫХ РАСТЕНИЙ К КИСЛОТНОМУ СТРЕССУ
Authors
O.E. Klimenko, N.I. Klimenko
Contact information
FSBIS "Orders of the Labor Red Banner Nikitsky Botanical Gardens - National Science Center of the Russian Academy of Sciences", Yalta, Russian Federation, Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.
Pages
414-417
DOI
10.31255/978-5-94797-319-8-414-417
Abstract
Oxides of sulfur and nitrogen cause air pollution and produce a significant oxidative effect. Plants are able to resist this phenomenon, which is due to the activity of the antioxidant system, which inhibits the process of free radical oxidation. Ascorbic acid and glutathione are important components of this system in the plant organism, since they are capable of redox reactions. But the roles of these substances and the degree of their change in the tissues of fruit plants under the condition of air pollution have not been sufficiently studied. In connection with this we investigated the changes in the content of ascorbic acid, glutathione and total redox activity in the leaves of peach and apricot plants under conditions of artificial acid stress. The acid effect is modeled by spraying a H2SO4 solution with pH = 2 on the tree branches. Previously we found that this concentration of H2SO4 is toxic to resistant varieties of peach. Negative effects are manifested in leaf damage, reduced growth and productivity up to 50% compared to pH = 6 (control). 11 varieties of peach (Prunus persica L. (Batsch) on almond rootstock (Prunus dulcis (Mill.) D.A. Webb.) and 9 apricot varieties (Prunus armeniaca L.) were included in the study.The varieties were selected for ascorbic acid content in fruits and for various reactions to acid stress on external symptoms. Significant changes in the elements of the antioxidant system under the influence of acid stress have been established. The different reaction of varieties under these conditions was found. The early maturing varieties were more sensitive to acid precipitation. Relative indicators of the state of the system of antioxidant protection of plants are calculated. The relative sensitivity of the studied varieties to acid stress was measured with the help of these indicators. We propose to use the index of the activity of leaf tissue as a test for the evaluation of various varieties of fruit plants of the Prunus L. genus to acid stress.