The EkSLK2-EkAACT regulatory module enhances drought and salt stress resistance in Euphorbia kansui by promoting triterpene synthesis.

EkSLK2-EkAACT interaction boosts triterpene synthesis, significantly improving drought and salt stress resistance in Euphorbia kansui with enhanced tolerance observed in transgenic plants.

• Why it matters: Understanding how plants naturally adapt to drought and salt stress is crucial for developing resilient crops, especially as climate change intensifies these challenges. The complex regulatory mechanisms involving proteins like SEUSS and its homologs remain poorly understood, limiting potential applications in agriculture.
• What they did: Researchers isolated the EkSLK2 gene from Euphorbia kansui and demonstrated that its overexpression enhances stress tolerance in Arabidopsis. They identified EkAACT as an interacting partner, verified through yeast two-hybrid assays, which increases enzyme activity and promotes triterpenoid biosynthesis, further supported by gene expression analyses in E. kansui.
• The result: The study reveals that EkSLK2 enhances drought and salt resistance by upregulating the mevalonate pathway and boosting triterpenoid production, providing new molecular insights that differ from traditional SEUSS mechanisms and offering potential targets for crop improvement.