期刊
NEW PHYTOLOGIST
卷 226, 期 1, 页码 142-155出版社
WILEY
DOI: 10.1111/nph.16330
关键词
Arabidopsis; phosphatidic acid (PA); SNX1; PIN2; phosphorus deficiency; vacuole
资金
- National Nature Science Foundation (NSFC) [91954206]
- National Key R&D Program of China [2018YFD0200600]
- State Key Laboratory of Wheat and Maize Crop Sciences
- Ten Thousand Talent Program
Root hair development is crucial for phosphate absorption, but how phosphorus deficiency affects root hair initiation and elongation remains unclear. We demonstrated the roles of auxin efflux carrier PIN-FORMED2 (PIN2) and phospholipase D (PLD)-derived phosphatidic acid (PA), a key signaling molecule, in promoting root hair development in Arabidopsis thaliana under a low phosphate (LP) condition. Root hair elongation under LP conditions was greatly suppressed in pin2 mutant or under treatment with a PLD zeta 2-specific inhibitor, revealing that PIN2 and polar auxin transport and PLD zeta 2-PA are crucial in LP responses. PIN2 was accumulated and degraded in the vacuole under a normal phosphate (NP) condition, whereas its vacuolar accumulation was suppressed under the LP or NP plus PA conditions. Vacuolar accumulation of PIN2 was increased in pld zeta 2 mutants under LP conditions. Increased or decreased PIN2 vacuolar accumulation is not observed in sorting nexin1 (snx1) mutant, indicating that vacuolar accumulation of PIN2 is mediated by SNX1 and the relevant trafficking process. PA binds to SNX1 and promotes its accumulation at the plasma membrane, especially under LP conditions, and hence promotes root hair development by suppressing the vacuolar degradation of PIN2. We uncovered a link between PLD-derived PA and SNX1-dependent vacuolar degradation of PIN2 in regulating root hair development under phosphorus deficiency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据