Waheed Abdul, Haxim Yakupjan, Kahar Gulnaz, Islam Waqar, Ullah Abd, Khan Khalid Ali, Ghramh Hamed A, Ali Sajjad, Asghar Muhammad Ahsan, Zhao Qinghua, Zhang Daoyuan
Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Plants (Basel). 2022 Sep 22;11(19):2480. doi: 10.3390/plants11192480.
It has been shown that jasmonic acid (JA) can alleviate drought stress. Nevertheless, there are still many questions regarding the JA-induced physiological and biochemical mechanisms that underlie the adaptation of plants to drought stress. Hence, the aim of this study was to investigate whether JA application was beneficial for the antioxidant activity, plant performance, and growth of L. Therefore, a study was conducted on plants aged six months, exposing them to 100% and 60% of their field capacity. A JA application was only made when the plants were experiencing moderate drought stress (average stem water potential of 1.0 MPa, considered moderate drought stress), and physiological and biochemical measures were monitored throughout the 14-day period. In contrast to untreated plants, the JA-treated plants displayed an improvement in plant growth by 15.5% and increased CO assimilation (AN) by 43.9% as well as stomatal conductance (GS) by 42.7% on day 3. The ascorbate peroxidase (APX), glutathione peroxidase (GPX), and superoxide dismutase (SOD) activities of drought-stressed JA-treated plants increased by 87%, 78%, and 60%, respectively, on day 3. In addition, plants stressed by drought accumulated 34% more phenolics and 63% more antioxidants when exposed to JA. This study aimed to understand the mechanism by which survives in drought conditions by utilizing the JA system.
研究表明，茉莉酸（JA）可以缓解干旱胁迫。然而，关于JA诱导的植物适应干旱胁迫的生理生化机制仍有许多问题。因此，本研究的目的是调查施用JA是否有利于L.的抗氧化活性、植株性能和生长。因此，对六个月大的植株进行了研究，使其处于田间持水量的100%和60%条件下。仅在植株遭受中度干旱胁迫（平均茎水势为1.0 MPa，视为中度干旱胁迫）时施用JA，并在整个14天期间监测生理生化指标。与未处理的植株相比，经JA处理的植株在第3天植株生长提高了15.5%，CO2同化量（AN）增加了43.9%，气孔导度（GS）增加了42.7%。干旱胁迫下经JA处理的植株在第3天的抗坏血酸过氧化物酶（APX）、谷胱甘肽过氧化物酶（GPX）和超氧化物歧化酶（SOD）活性分别提高了87%、78%和60%。此外，干旱胁迫下的植株在施用JA后积累的酚类物质多34%，抗氧化剂多63%。本研究旨在了解利用JA系统在干旱条件下存活的机制。
