Growth and survival strategies of oilseed rape (Brassica napus L.) leaves under potassium deficiency stress: trade‐offs in potassium ion distribution between vacuoles and chloroplasts

• DOI: 10.1111/tpj.70009
• Publication Date: 2025-03-12T01:28:46Z
• Authors: Hehe Gu; Ziyao He; Zhifeng Lu; Shipeng Liao; Yangyang Zhang; Xiaokun Li; Rihuan Cong; Tao Ren; Jianwei Lu

SUMMARY Potassium (K) is a prevalent limiting factor in terrestrial ecosystems, with approximately one‐eighth of the world's soils undergoing K + deficiency stress. Upon encountering stress, leaf area (LA) declines before net photosynthetic rate ( A n ). The sequential alterations fundamentally represent adaptive trade‐off between survival and growth plants subjected to This hypothesized be linked differences subcellular distribution limited resources. Thus, apparent concentration compartments, along LA characteristics rapeseed leaves at various developmental stages supply conditions were quantified elucidate mechanisms by which regulates survival. results revealed that during early deficiency, actively downregulate sustain normal physiological functions. primarily accomplished lowering vacuoles, restricting expansion, enhancing chloroplasts ensure . Prolonged decreased below critical threshold (37.8 m ), disrupting chloroplast structure function, impairing , ultimately threatening rapeseed. Hence, sustaining an adequate within crucial for preserving efficiency ensuring under In conclusion, regulate trade‐offs vacuoles coordinate