산-생장설에 대한 최근 연구 동향

• 영문명: Recent research progress on acid-growth theory
• 발행기관: (사)한국식물생명공학회
• 저자명: 이상호(Sang Ho Lee)
• 간행물 정보: 『Journal of Plant Biotechnology』43권 4호, 405~410쪽, 전체 6쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2016.12.31

영문 초록

Auxins are essential in plant growth and development. The auxin-stimulated elongation of plant cells has been explained by the “acid-growth theory”, which was proposed forty years ago. According to this theory, the auxin activates plasma membrane H+-ATPase to induce proton extrusion into the apoplast, promoting cell expansion through the activation of cell wall-loosening proteins such as expansins. Even though accepted as the classical theory of auxin-induced cell growth for decades, the major signaling components comprising this model were unknown, until publication of recent reports. The major gap in the acid growth theory is the signaling mechanism by which auxin activates the plasma membrane H+-ATPase. Recent genetic, molecular, and biochemical approaches reveal that several auxin-related molecules, such as TIR1/AFB AUX/IAA coreceptors and SMALL AUXIN UP RNA (SAUR), serve as important components of the acid-growth model, phosphorylating and subsequently activating the plasma membrane H+-ATPase. These researches reestablish the four-decade-old theory by providing us the detailed signaling mechanism of auxininduced cell growth. In this review, we discuss the recent research progress in auxin-induced cell elongation, and a set of possible future works based on the reestablished acid-growth model.

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키워드

Auxin Cell elongation H+-ATPase PP2C TIR1/AFB SAUR AUX/IAA