Mechanism of temperature-dependent flower malformation in carnations

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K07285
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Horticultural science
• Research Institution: Utsunomiya University
• Principal Investigator: Yamane Kenji 宇都宮大学, 農学部, 教授 (60240066)
• Co-Investigator(Kenkyū-buntansha): 黒倉 健 宇都宮大学, 農学部, 講師 (10650898)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 奇形花 / 変異 / 温度依存 / 遺伝子発現 / 花芽分化

Outline of Final Research Achievements

Temperature regimes that cause malformed flowers were examined by using mutants of the potted carnation ‘Cherie’. Plants of normal (WT) and malformed (mlf) lines were grown under several temperature regimes. This flower malformation was reversible depending on the temperature regime. mlf plants produced 92.2% of malformed flowers under constant 15°C, whereas flower malformation was significantly lower under 20°C and 25/20°C. Morphological differences between WT and mlf after sepal formation. RNA-seq revealed that HSC70，Wushcel and LOG3 genes were upregulated in flower buds of mlf plants at 15°C. Mechanism of this malformation was discussed.

Free Research Field

園芸学