Eremopyrum triticeum is a kind of ephemeral plants which belongs to the wild relative of wheat.It lives mainly on the edge of Zhungeer desert in Xinjiang,China.To survive in extreme environment,E.triticeum has developed the characteristics of drought tolerance,leanness-resistant and high photosynthesis efficiency etc.Study on molecular mechanism of E.triticeum drought-tolerance is very important for increasing crop stress tolerance via gene transfer.