83. シロイヌナズナ花茎の組織癒合におけるジャスモン酸とAP2型転写制御因子の働き(口頭発表,植物化学調節学会第46回大会)

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Tissue reunion is one of the adaptive responses to injury which influence plant growth and development. While tissue reunion in the vascular tissue has been studied well, molecular mechanisms controlling tissue reunion in plant are not fully understood. To elucidate the mechanism of the tissue reunion, we have been analyzing the tissue reunion process of the Arabidopsis thaliana cut flowering stem tissue. Previous study showed one of the phytohormone auxin is necessary for the tissue reunion. Furthermore based on microarray data of tissue reunion, tissue reunion-specific genes were identified and the functions of some transcription factors were demonstrated in Arabidopsis cut flowering stem. NAC transcription factor ANAC071 was specifically expressed in the upper part of incision under the up-regulation by auxin and ethylene, and played important roles in tissue-reunion. On the other hand, AP2 transcription factor RAP2.6L was specifically expressed in the lower part of incision under the down regulation by auxin and up-regulation by JA. In order to understand the role of JA and RAP2.6L in reunion, JA-related mutants for biosynthesis and signaling, rap2.6L mutant and RAP2.6L-SRDX transgenic plant have been analyzed. Defect in RAP2.6L function caused reduction of cell division. JA-related mutants (biosynthesis and signaling) showed some dramatic phenotypes in tissue reunion. In conclusion, RAP2.6L and JA have significant implication in the molecular mechanism of tissue reunion.
2011-10-03

83. シロイヌナズナ花茎の組織癒合におけるジャスモン酸とAP2型転写制御因子の働き(口頭発表,植物化学調節学会第46回大会)

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