The secret motor protein that slams leaf pores shut—and saves crops

Scientists have discovered that a protein once thought to be just a cellular "courier" actually helps plants survive drought. This motor protein, myosin XI, plays a critical role in helping leaves close their pores to conserve water. When it's missing, plants lose water faster, respond poorly to drought, and activate fewer protective systems. The finding could open the door to hardier crops that can withstand a warming, drying world.