PnPMA1, an atypical plasma membrane H+-ATPase, is required for zoospore development in Phytophthora parasitica

► Zoospores are important agents for plant infection by most Phytophthora species. ► The topology of the plasma membrane H+-ATPase PnPMA1 of P. parasitica was determined. ► PnPMA1-silenced P. parasitica transformants were generated and analyzed. ► High levels of PnPMA1 silencing led to production of abnormal zoospores and cyst germination. ► PnPMA1 plays important roles in zoospore development in P. parasitica.