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Increased Abiotic Stress Tolerance by Over-expressing OsABF2 in Transgenic Arabidopsis thaliana

OsABF2를 과발현시킨 애기장대에서 비생물학적 스트레스에 대한 내성 증가

  • Park, Phun Bum (Department of Bioscience and Biotechnology, University of Suwon)
  • 박훤범 (수원대학교 생명공학과)
  • Received : 2012.09.18
  • Accepted : 2012.11.09
  • Published : 2012.11.30

Abstract

The phytohormone abscisic acid (ABA) plays an important role in the adaptive response of plants to abiotic stresses. ABA also regulates many important processes, including seed dormancy, germination, inhibition of cell division, and stomatal closure. OsABF2 (Oryza sativa ABRE binding factor2) is one of the bZIP type transcription factors, which are involved in abiotic stress response and ABA signaling in rice. Expression of OsABF2 is induced by ABA and various stress treatments. Findings show that survival rates of OsABF2 over-expressing Arabidopsis lines were increased under drought, salt, and heat stress conditions. The germination ratio of OsABF2 over-expressing Arabidopsis lines was decreased in the presence of ABA. Results indicate that OsABF2 over-expressing Arabidopsis lines have enhanced abiotic stress tolerance and have increased ABA sensitivity.

Acknowledgement

Supported by : 한국연구재단

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