Regulation of Plant Biomass and Stress Tolerance

摘要

The present invention relates to transgenic plants having greater tolerance to an abiotic stress, than a control plant for example cold or osmotic stress such as heat, desiccation, drought, freezing, and high salt stress, wherein said transgenic plant comprises a recombinant polynucleotide that encodes a polypeptide; wherein the polypeptide comprises a first domain comprising SEQ ID NO: 72, and a second domain that has at least 62% amino acid sequence identity to the second conserved domain of SEQ ID NO: 2 as set forth in Table 1 and the second domain comprises SEQ ID NO: 63 or SEQ ID NO: 64; wherein expression of the polypeptide in the transgenic plant is regulated by a non-constitutive promoter, and expression of the polypeptide in the transgenic plant confers to the transgenic plant said greater tolerance to the abiotic stress; wherein said control plant does not comprise the recombinant polynucleotide; and said transgenic plant has fewer undesirable developmental abnormalities or fewer adverse morphological effects than a second control plant that expresses the polypeptide under the regulatory control of a constitutive promoter. The invention also provides methods of making these and other types of plants resistant to abiotic stresses, and to seeds and other plant materials of said plants.