Functional analysis of brassinosteroid in gravity resistance of Arabidopsis inflorescence stem

2016 Fiscal Year Final Research Report

• Project/Area Number: 25514004
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: 宇宙生命学
• Research Institution: Yokohama City University
• Principal Investigator: Yamazaki Chiaki 横浜市立大学, 木原生物学研究所, 客員研究員 (30636189)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 重力応答 / シロイヌナズナ / ブラシノステロイド / 抗重力形態形成

Outline of Final Research Achievements

Gravitropism is a plant's gravity response, which enables plants to orient their photosynthetic organs upward and to the sunlight. The mechanisms in the gravitropism have been studied extensively, and revealed to be regulated by polar transport of auxin. On the other hand, mechanical resistance is another gravity response distinct from gravitropism. Under hypergravity stimuli, plants increase the rigidity against the gravitational force. We reported that brassinosteroid determines stem rigidity and length of elongation zone that have capability to respond to gravistimulation. In this study, we revealed that brassinosteroid-dependent cell wall regulation is important for mechanical resistance of Arabidopsis inflorescence stems.

Free Research Field

植物生理学