ArticleFrontiers in plant science2024
Physiological and metabolomic analyses reveal the mechanism by which exogenous spermine improves drought resistance in alfalfa leaves (
Article in Frontiers in plant science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Integrated Transcriptomic and Metabolomic Analyses Reveal Adaptive Mechanisms ofPlants (Basel, Switzerland) · 2026Article
- Ectopic expression of safflower NAC transcription factorGM crops & food · 2025Article
- Widely targeted metabolic profiling reveals drought resistance mechanisms in alfalfa leaves.BMC plant biology · 2025Article
- Spermine treatment improves salinity tolerance in Plantago major by altering growth parameters, biochemical profiles and gene expression.Scientific reports · 2025Article
- Paraquat resistance mutations have differential effects on plant fitness in two rice cultivars.The Biochemical journal · 2025Article
- Exogenous putrescine enhances salt tolerance inFrontiers in plant science · 2025Article
- Grafting Onto a Tolerant Rootstock Enhances Grapevine Tolerance to Combined Salt and Drought Stress.Physiologia plantarumArticle
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Abstract
Introduction: Alfalfa ( Methods: In this study, we root applied 0.1, 0.5, and 1 mM Spm to Gannong No. 3 (G3) alfalfa under drought stress, and then determined their physiological and metabolic changes. Results: The results showed that exogenous Spm increased chlorophyll content, chlorophyll fluorescence parameters and gas exchange parameters, enhanced antioxidant enzymes activity, improved ascorbic acid-glutathione (AsA-GSH) cycle, increased osmoregulatory substances content, reduced hydrogen peroxide and superoxide anion levels, and inhibited malondialdehyde accumulation in alfalfa under drought stress, thereby increasing plant height and leaf relative water content and enhancing drought tolerance of alfalfa. The redundancy analysis of the above physiological indicators showed that the addition of the optimal Spm to improve drought tolerance of alfalfa under drought stress was mainly achieved by increasing catalase activity and improving the ASA-GSH cycle. In addition, metabolomics analysis revealed that exogenous Spm increased the content of oxobutanedioic acid, citric acid, fumaric acid and malic acid to enhance the tricarboxylic acid cycle. Meanwhile, exogenous Spm increased endogenous Spm and proline (Pro) content to resist drought stress by enhancing Spm and Pro metabolism. Moreover, exogenous Spm increased the accumulation of the signaling substance abscisic acid. Discussion: In conclusion, exogenous Spm enhanced drought resistance of alfalfa leaves under drought stress.
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