Yu Xiaofang, Liu Yujia, Cao Panpan, Zeng Xiaoxuan, Xu Bin, Luo Fuwen, Yang Xuan, Wang Xiantong, Wang Xiaoyu, Xiao Xue, Yang Lijuan, Lei Ting
College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China.
Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China.
Plants (Basel). 2023 Oct 30;12(21):3729. doi: 10.3390/plants12213729.
Drought is among the most important abiotic stresses on plants, so research on the physiological regulation mechanisms of plants under drought stress can critically increase the economic and ecological value of plants in arid regions. In this study, the effects of drought stress on the growth status and biochemical indicators of were explored. Under drought stress, the root system, leaves, rhizomes, and terrestrial stems of plants were sequentially affected; the root system was sparse and slender; and the leaves lost their luster and gradually wilted. Among the physiological changes, the increase in the proline and soluble protein content of enhanced the cellular osmotic pressure and reduced the water loss. In anatomical structures, chloroplasts were deformed after drought treatment, whereas the anatomical structures of roots did not substantially change. Plant antioxidant systems play an important role in maintaining cellular homeostasis; but, as drought stress intensified, the soluble sugar content of terrestrial stems was reduced by 55%, and the ascorbate peroxidase, glutathione reductase, and monodehydroascorbate reductase (MDHAR) activities of leaves and the MDHAR activity of roots were reduced by 29%, 40%, 22%, and 77%, respectively. Overall, was resistant to 63 days of severe drought stress and resisted drought through various physiological responses. These findings provide a basis for the application of in water-scarce areas.
干旱是对植物最重要的非生物胁迫之一，因此研究干旱胁迫下植物的生理调节机制对于提高干旱地区植物的经济和生态价值至关重要。在本研究中，探究了干旱胁迫对[植物名称]生长状况和生化指标的影响。在干旱胁迫下，植物的根系、叶片、根茎和地上茎依次受到影响；根系稀疏且纤细；叶片失去光泽并逐渐枯萎。在生理变化方面，[植物名称]脯氨酸和可溶性蛋白含量的增加增强了细胞渗透压并减少了水分流失。在解剖结构上，干旱处理后[植物名称]叶绿体变形，而根系的解剖结构没有实质性变化。植物抗氧化系统在维持细胞内稳态中起重要作用；但是，随着干旱胁迫加剧，地上茎可溶性糖含量降低了55%，叶片的抗坏血酸过氧化物酶、谷胱甘肽还原酶和单脱氢抗坏血酸还原酶（MDHAR）活性以及根系的MDHAR活性分别降低了29%、40%、22%和77%。总体而言，[植物名称]能耐受63天的重度干旱胁迫，并通过各种生理反应抵御干旱。这些研究结果为[植物名称]在缺水地区的应用提供了依据。
