Molecular mechanisms of cell cycle control during the dormancy to growth transition in axillary buds

2016 Fiscal Year Final Research Report

• Project/Area Number: 26440135
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plant molecular biology/Plant physiology
• Research Institution: National Institute of Genetics (2016); Nagoya University (2014-2015)
• Principal Investigator: Shimizu-Sato Sae (志水佐江) 国立遺伝学研究所, 実験圃場, 特任研究員 (90397472)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 頂芽優勢

Outline of Final Research Achievements

In intact plants, the terminal bud grows predominantly, while the growth of the axillary buds is suppressed. This phenomenon is called apical dominance, which is a survival strategy in plants. This study is focused on the cell cycle regulation in comparison dormancy with growth in axillary buds. I identified the inhibitor of cyclin-dependent kinase (ICK) protein as a negative regulator in cell cycle control. Immunoprecipitation with anti-ICK antibody showed the protein complex in dormant axillary buds. After decapitation, ICK protein was degraded immediately in axillary buds. The levels of ICK protein were not affected with inhibitors of proteasome. These results suggested a part of molecular mechanisms of cell cycle regulation during the dormancy to growth transition in axillary buds.

Free Research Field

植物生理