Phospholipase D‐derived phosphatidic acid promotes root hair development under phosphorus deficiency by suppressing vacuolar degradation of PIN‐FORMED2

What is it about?

Phosphate is one of the major nutrients limiting the crop production in agriculture. Illustration of the mechanism how plants response to phosphorus deficiency will help for crop improvement. Root hair development plays crucial roles in phosphate absorption, and we here demonstrate that polar auxin transport and auxin efflux carrier PIN2 are important for root hair development under phosphorus deficiency. The vacuolar degradation of PIN2 is suppressed by phosphorus deficiency or phosphatidic acid (PA), which is induced under low phosphate condition. PA binds to Sorting Nexin1 (SNX1) to promote its accumulation at plasma membrane, resulting in the suppressed endocytosis and vacuolar degradation of PIN2, and hence the stimulated root hair development and plant growth under low phosphate condition.

Featured Image