ArticleFrontiers in plant science2026
Morphological, physiological, and root metabolomic responses of
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Drought stress is a major environmental factor limiting plant growth and ecosystem stability in arid and semi-arid regions. Methods: In this study, a 12-week gradient drought stress experiment was conducted. An integrated multi-parameter approach was applied to systematically evaluate the responses of Results: Morphologically, drought stress induced changes such as root thickening, whereas severe and extreme drought significantly inhibited plant height, root growth, and adventitious root formation. Physiologically, plants under moderate drought maintained relatively stable leaf water content and some physiological traits, while severe drought caused pronounced membrane damage and oxidative stress responses. Metabolically, drought stress substantially remodeled root metabolic networks, with numerous differential metabolites detected across comparison groups, primarily involving amino acids, flavonoids, and coumarins. Among them, 23 differential metabolites were annotated to the isoflavonoid biosynthesis pathway. Correlation analysis indicated significant associations between root morphological traits, physiological indicators, and key metabolites: proline, malondialdehyde (MDA), and peroxidase (POD) activity were negatively correlated with certain growth parameters, whereas some isoflavone glycosides and isoflavonoid metabolites were positively correlated. Discussion: This study provides a comprehensive "morphology-physiology -metabolism" perspective on the responses of
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