Zhigzhitzhapova Svetlana V, Dylenova Elena P, Goncharova Danaya B, Zhigzhitzhapov Bato V, Emelyanova Elena A, Polonova Anastasiya V, Tykheev Zhargal A, Bazarsadueva Selmeg V, Taraskina Anna S, Pintaeva Evgeniya T, Taraskin Vasiliy V
Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, Ulan-Ude 670047, Russia.
Filippov Buryat State Agricultural Academy, Ulan-Ude 670024, Russia.
Plants (Basel). 2024 Sep 20;13(18):2630. doi: 10.3390/plants13182630.
Plants are sessile organisms and any changes in environmental factors activate various responses and defense mechanisms. plants widely inhabit harsh conditions of arid and semiarid ecosystems. Using two species-a subshrub, , and an annual-biennial herb, -the functioning of the antioxidant system of plants in semiarid territories have been examined. The activity of enzymatic antioxidants and the content of non-enzymatic antioxidants in both species as well as the antiradical activity of their extracts have been shown. Although the plants were collected in areas differing in moisture supply, the activity of enzymatic antioxidants and the content of non-enzymatic antioxidants corresponds to their physiological level, within the range of the norm of reaction, in wormwood. Consequently, conditions of differing moisture deficiency do not cause a specific biochemical response at the level of the antioxidant system in the studied species, which confirms their adaptability to these conditions. Meanwhile, plants show greater morphological and biochemical plasticity than under changing growth conditions. Both species contain tissue monoterpenoids and sesquiterpenoids, the emission of which provides additional protection against high temperatures and drought. Their composition and contents of phenolic components illustrates the differences in adaptation between perennial and annual plants.
植物是固着生物，环境因素的任何变化都会激活各种反应和防御机制。植物广泛分布于干旱和半干旱生态系统的恶劣环境中。利用两种植物——一种亚灌木和一种一年生至二年生草本植物，研究了半干旱地区植物抗氧化系统的功能。研究显示了这两种植物中酶促抗氧化剂的活性、非酶促抗氧化剂的含量以及它们提取物的抗自由基活性。尽管这些植物是在水分供应不同的地区采集的，但酶促抗氧化剂的活性和非酶促抗氧化剂的含量在艾草的反应正常范围内与其生理水平相对应。因此，不同程度的水分亏缺条件不会在所研究物种的抗氧化系统水平上引发特定的生化反应，这证实了它们对这些条件的适应性。同时，在不断变化的生长条件下，[此处原文两个物种名称缺失]植物比[此处原文两个物种名称缺失]表现出更大的形态和生化可塑性。这两个物种都含有组织单萜类化合物和倍半萜类化合物，其释放提供了针对高温和干旱的额外保护。它们酚类成分的组成和含量说明了多年生植物和一年生植物在适应性方面的差异。
