The present invention provides compositions and methods for increasing the level of mannosylglycerate in plants. Plants with increased levels of mannosylglycerate exhibit enhanced tolerance to stress, e.g., drought.
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
 The invention described and claimed herein was made using funds supplied by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The government has certain rights in this invention.