@article {1765, title = {Grasses of different C4 subtypes reveal leaf traits related to drought tolerance in their natural habitats: Changes in structure, water potential, and amino acid content}, journal = {American Journal of Botany}, volume = {96}, number = {7}, year = {2009}, pages = {1222-1235}, keywords = {Grasses, KEYS}, author = {Carmo-Silva, A.F. and Powers, S.J. and Keys, A.J. and Ascensao,L. and Parry, M.A.J. and Arrabaca, M.C.} }