현사시나무 Gibberellic Acid-Stimulated Arabidopsis (GASA) 유전자의 발현 특성 및 건조 스트레스 내성 구명

• 영문명: Characterization of Gibberellic Acid-Stimulated Arabidopsis (GASA) gene to drought stress response in Poplar (Populus alba × P. glandulosa)
• 발행기관: (사)한국식물생명공학회
• 저자명: 최현모(Hyunmo Choi) 배은경(Eun-kyung Bae) 최영임(Young-im Choi) 윤서경(Seo-kyung Yoon) 이효신(Hyoshin Lee)
• 간행물 정보: 『Journal of Plant Biotechnology』44권 1호, 61~68쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2017.03.31

영문 초록

Gibberellic Acid-Stimulated Arabidopsis (GASA) genes are involved in plant hormone signaling, cell division and elongation, as well as in responses to stress conditions in plants. In this study, we isolated a GASA gene from hybrid poplar (Populus alba × P. glandulosa) and analyzed its physiological phenotype and molecular functions in poplar. PagGASA cDNA encodes a putative protein composed of 95 amino acids containing an N-terminal signal peptide and a conservative cysteine-rich C-terminal domain. Southern blot analysis revealed that one or two copies of the PagGASA are present in the poplar genome. The PagGASA transcripts were highly detected in flowers and roots. Moreover, the expression of PagGASA was induced by growth hormone (gibberellic acid) and stress hormones (abscisic acid, jasmonic acid, and salicylic acid). By using transgenic analysis, we showed that the upregulation of PagGASA in poplar provides high tolerance to drought stress. Therefore, our results suggest that PagGASA plays an important role in drought stress tolerance via stress-related plant hormone signaling in poplar.

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키워드

Drought stress Gene expression PagGASA transgenic poplar