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Studies on the molecular mechanism of HOS1-mediated phytochrome B function during hypocotyl growth of Arabidopsis : 애기장대의 배축 길이 성장 과정에 있어서 HOS1을 통한 phytochrome B 기능 조절에 대한 분자적 메커니즘 연구
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- Authors
- Advisor
- 박충모
- Issue Date
- 2021-02
- Publisher
- 서울대학교 대학원
- Keywords
- hypocotyl growth ; phytochrome signaling ; HOS1 ; PIF4 ; phyB ; 배축 길이 성장 ; 파이토크롬 ; 광형태형성
- Description
- 학위논문 (석사) -- 서울대학교 대학원 : 자연과학대학 화학부, 2021. 2. 박충모.
- Abstract
- During seedling development, response to light induces inhibition of hypocotyl elongation, cotyledon opening, and leaf greening, and those are called photomorphogenesis. For hypocotyl elongation, photoreceptors, especially one of the red/far-red light-sensing phytochromes, phytochrome B, is regarded as a crucial regulator of it.
Although, it is not completely known how the phytochrome B regulates hypocotyl growth. Here, I showed that well known E3 ubiquitin ligase, HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENES 1, prevents the transcriptional activation activity of PHYTOCHROME INTERACTING FACTOR 4 which induces hypocotyl cell growth. Also, photoactivated phyB is needed for activation of HOS1 in inhibiting PIF4 activity. Consequently, I found a new molecular mechanism for the phyB-dependent prohibition of hypocotyl growth in Arabidopsis.
- Language
- eng
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