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Abstract
The features of accumulation of rutin and apigenin-7-O-glucoside and their distribution in the aboveground organs of Alyssum lenense Adams (Brassicaceae Burnett) were revealed. The content of photosynthetic pigments was investigated depending on the phytocenotic conditions of plant growth in the territory of Central Yakutia. The data obtained on the content of flavonoids are characterized by an uneven distribution over organs with respect to different phytocenotic conditions of the growth of cenopopulations. A. lenense was collected during flowering period in 8 cenopopulations and in the collection of the Yakutsk Botanical Garden. The distribution of rutin content over the aboveground organs of A. lenense was directed: flowers → leaves → stem and depended on the altitude of the population growth, shading, and phytocenosis. The distribution pattern of apigenin-7-O-glucoside corresponded to the scheme: flowers / = leaves → stem and depended on phytocenotic growing conditions. It was revealed that rutin in flowers is higher than apigenin-7-O-glucoside under the conditions of introduction and in the Veronica incana-Festuca lenensis-Stipa capillata grass steppe; in the plants of the other studied cenopopulations, the ratio was inverse. The same amount of flavonoids in flowers was observed in A. lenense, growing in Pulsatilla flavescens steppe and Artemisia commutata steppe. In most of the studied cenopopulations, the content of apigenin-7-O-glucoside in leaves and stems was higher than rutin, with the exception of populations growing in a dry pine forest, at the edge of a pine forest, and in leaves - only in plants on an artificial slope at the initial stage overgrowth. Phytocenotic growing conditions affect the amount of pigments in the leaves of A. lenense: the largest amount was recorded in the population growing in a dry pine forest, and the smallest in Artemisia frigida steppe and Artemisia commutata steppe.
Highlights
Экспериментальная частьМатериалом для исследований служила надземная биомасса генеративных особей Alyssum lenense
Работа выполнена в рамках государственного задания Министерства науки и высшего образования Российской Федерации по теме No0297-2021-0023 ЕГИСУ НИОКТР No АААА-А21-121012190038-0
Исследования, связанные с влиянием фитоценотических условий на фотосинтетический аппарат растений, также представляют научный интерес, так как содержание пигментов является важным и чувствительным показателем физиологического состояния растений и направленности адаптивных реакций [21]
Summary
Материалом для исследований служила надземная биомасса генеративных особей Alyssum lenense. ЦП 1 входит в состав верониково-типчаково-ковыльного сообщества, расположенного на южном склоне (40°) коренного берега р. ЦП 3 входит в состав типчаково-прострелового сообщества, расположенного на южном склоне (40°) коренного берега р. Якутска) на высоте 5–25 м от подножья. ОПП травостоя – 16%, ПП Alyssum lenense – 2%, почва плотная. ЦП 5 входит в состав замещающеполынного сообщества, расположенного на южном склоне (38о) коренного берега р. Антропогенное воздействие умеренное – на участке осуществляется нерегулярный выпас. ОПП травостоя – 10%, ПП Alyssum lenense – 8%.
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