ArticleBMC plant biology2026
Exogenous spermidine (Spd) improves the tolerance to alkaline-salt stress in potato.
Article in BMC plant biology, 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
backgroundPotato (Solanum tuberosum L.) is the world's fourth most important staple crop, but its production is increasingly threatened by soil salinization, particularly alkaline-salt stress caused by excessive NaHCO
resultsThe results demonstrated that exogenous Spd enhances alkaline-salt tolerance in potato by increasing antioxidant enzyme activities and maintaining osmotic balance. RNA sequencing (RNA-seq) and weighted gene co-expression network analysis (WGCNA) revealed obvious tissue-specific transcriptional reprogramming in potato under Spd-combined alkaline-salt stress, with 5,968 differentially expressed genes (DEGs) identified in leaves and only 187 in roots. KEGG pathway analysis indicated that Spd mainly regulates plant hormone signal transduction, carbon metabolism and photosynthesis pathways in leaves, as well as ribosome and energy metabolism-related pathways in roots. Three candidate hub genes, StHK4, StbZIP27 and StERF106, were screened from key Spd-responsive modules. Among them, StHK4 exhibited the highest upregulation ( Log
conclusionsThis study demonstrates that exogenous Spd enhances alkaline-salt tolerance in potato by modulating multiple physiological processes and transcriptional networks. The screened candidate hub genes (StHK4, StbZIP27, and StERF106) serve as potential pivotal regulators responsible for Spd-induced stress tolerance, providing valuable gene resources and novel mechanistic insights for understanding polyamine-mediated stress adaptation in potato.
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