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Metabolomic analysis reveals key metabolites and metabolic pathways in Suaeda salsa under salt and drought stress

Functional plant biology : FPB(2023)

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摘要
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.
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关键词
abiotic,ecological restoration,enrichment,metabolic profiling,osmoregulation,pathways,stress response,tolerance
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