Cold Stress Tolerance of the Filial Generations Produced by AtDREB1A Transgenic Ground Cover Chrysanthemum and a Conventional Variety Prokaryotic Expression of DREB1A Transcription Factor Analysis of drought tolerance and herbicide resistance in transgenic potato plants over-expressing DREB1A/Bar Physiological Responses to Water Deficit and Post-drought Recovery of DREB 1 A Transgenic Kentucky Bluegrass plant Cold Stress Tolerance of the Filial Generations Produced by AtDREB1A Transgenic Ground Cover Chrysanthemum and a Conventional Variety Construction of a bivalent plant expression vector of DREB1A and Bar genes and studies of genetic transformation of potato Cloning of transcription factor DREB1A gene and the construction of plant express vector Cloning of inducible promoter rd29A and the construction of plant express vector