Quality control for plant gametogenesis

2016 Fiscal Year Final Research Report

• Project/Area Number: 25440130
• 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: Nagoya University
• Principal Investigator: UEGUCHI CHIHARU 名古屋大学, 生物機能開発利用研究センター, 准教授 (20232738)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: plant senescence / ionic homeostasis / cation channel

Outline of Final Research Achievements

In monocarpic plants, it is observed that developing reproductive structures control whole-plant senescence, so-called global proliferative arrest (GPA). To identify genes involved in this process, we isolated and analyzed a mutant showing premature cessation of inflorescence growth in Arabidopsis. The mutant, named premature aging 1 (pma1), plants exhibited earlier cessation of floral bud formation and stem growth. In addition, pma1 showed premature cessation of leaf growth and earlier senescence. Map-based cloning revealed that pma1 is a missense allele of the CNGC20 gene encoding a cyclic nucleotide-gated cation channel. These results suggest that the maintenance of intracellular ionic homeostasis is important for the process of whole-plant senescence.

Free Research Field

Molecular Biology