Transgenic sweetpotato plants with shade tolerance and process for producing the same

摘要

A transgenic sweet potato is provided to utilize light efficiently by decreasing or inhibiting competition in a plant or between plants due to short height and internode, increased number of leave, thick stem, and dark green leaves, promote the strong growth of the plant, and increase the resistance against biological and non-biological stress, thereby increasing the productivity of the sweet potato. A transgenic sweet potato(Ipomoea batatas) is redifferentiated from an embryogenic callus of a sweet potato transformed by a recombinant vector including a phytochrome A gene of mutated Avena sativa in which a number 598 amino acid serine codon(AGT) is substituted with an alanine codon(GCT) and the expression of the gene is under the control of a CaMV35S promoter or a microorganism transformed by the recombinant vector; and has the inhibited shade avoidance or the increased shade tolerance. A method for preparing the transgenic sweet potato comprises the steps of: (a) constructing the recombinant vector; (b) after transforming the embryogenic callus of the sweet potato with the recombinant vector through particle bombardment or Agrobacterium tumefaciens technique, selecting the transformed callus; and (c) after redifferentiating the transgenic potato having the inhibited shade avoidance or the increased shade tolerance from the transformed callus, selecting the transgenic sweet potato.