Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, College of Life Science, Guangxi Normal University, Ministry of Education, Guilin 541004, China.
City Management and Service Centre of Tiemenguan, Xinjiang, China.
Funct Plant Biol. 2023 Sep;50(9):701-711. doi: 10.1071/FP23049.
Suaeda salsa is an important salt- and drought-tolerant plant with important ecological restoration roles. However, little is known about its underlying molecular regulatory mechanisms. Therefore, understanding the response mechanisms of plants to salt and drought stress is of great importance. In this study, metabolomics analysis was performed to evaluate the effects of salt and drought stress on S. salsa . The experiment consisted of three treatments: (1) control (CK); (2) salt stress (Ps); and (3) drought stress (Pd). The results showed that compared with the control group, S. salsa showed significant differences in phenotypes under salt and drought stress conditions. First, a total of 207 and 292 differential metabolites were identified in the Ps/CK and Pd/CK groups, respectively. Second, some soluble sugars and amino acids, such as raffinose, maltopentoses, D -altro-beptulose, D -proline, valine-proline, proline, tryptophan and glycine-L -leucine, showed increased activity under salt and drought stress conditions, suggesting that these metabolites may be responsible for salt and drought resistance in S. salsa . Third, the flavonoid biosynthetic and phenylalanine metabolic pathways were significantly enriched under both salt and drought stress conditions, indicating that these two metabolic pathways play important roles in salt and drought stress resistance in S. salsa . The findings of this study provide new insights into the salt and drought tolerance mechanisms of S. salsa .
碱蓬是一种重要的耐盐耐旱植物，具有重要的生态修复作用。然而，人们对其潜在的分子调控机制知之甚少。因此，了解植物对盐胁迫和干旱胁迫的响应机制具有重要意义。本研究采用代谢组学分析方法，评估盐胁迫和干旱胁迫对碱蓬的影响。实验设置了 3 种处理：（1）对照（CK）；（2）盐胁迫（Ps）；（3）干旱胁迫（Pd）。结果表明，与对照组相比，盐胁迫和干旱胁迫条件下碱蓬的表型有显著差异。首先，在 Ps/CK 和 Pd/CK 组中分别鉴定出 207 种和 292 种差异代谢物。其次，一些可溶性糖和氨基酸，如棉子糖、麦芽糖、D-阿卓戊糖、D-脯氨酸、缬氨酸-脯氨酸、脯氨酸、色氨酸和甘氨酸-L-亮氨酸，在盐胁迫和干旱胁迫条件下活性增加，表明这些代谢物可能与碱蓬的耐盐耐旱性有关。第三，黄酮类生物合成和苯丙氨酸代谢途径在盐胁迫和干旱胁迫下均显著富集，表明这两个代谢途径在碱蓬的耐盐耐旱性中发挥重要作用。本研究为碱蓬的耐盐耐旱机制提供了新的见解。
