Physiological and transcriptomic analyses revealed the alleviating effects of exogenous Ca2+ and NO compound treatment on high salt stress in Reaumuria soongorica

作者：Zehua Liu, Hanghang Liu, Bingbing Tan, Xidui Wang, Peifang Chong · 发表于：BMC Genomics · 年份：2025 · DOI：10.1186/s12864-025-11355-w · 被引用次数：5 · 研究领域：Silicon Effects in Agriculture、Plant Stress Responses and Tolerance、Plant Micronutrient Interactions and Effects

Soil salinization represents the most prevalent abiotic stress, severely impacting a severe impact on plant growth and crop yield. Consequently, delving into the mechanism through which exogenous substances enhance plant salt tolerance holds significant importance for the stabilization and augmentation of crop yield. In this study, within the context of salt stress, the seedlings of R. soongorica were subjected to exogenous Ca 2+ and NO treatments. The aim was to comprehensively explore the alleviation effects of exogenous Ca 2+ and NO on the high salt stress endured by R. soongorica from the perspectives of physiology and transcriptomics. The experimental results demonstrated that the combined treatment of exogenous Ca 2+ and NO increased the relative water content and free water content of R. soongorica seedlings during salt stress conditions. Simultaneously, it induced a reduction in the leaf sap concentration, leaf water potential, water saturation deficit, and the ratio of bound water to free water. These modifications effectively regulated water metabolism and mitigated physiological drought induced by salt stress. In addition, the concurrent treatment of exogenous Ca 2+ and NO could diminish Na + and Cl − levels in R. soongorica seedlings under salt stress. At the same time, it was effective in elevating the contents of K + and Ca 2+ , thereby facilitating the adjustment of the ion equilibrium. As a result, this treatment served to relieve the ion toxicity precipitated...