Physiological active substances and fruit affected by light quality

2012 Fiscal Year Final Research Report

• Project/Area Number: 22380020
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Horticulture/Landscape architecture
• Research Institution: Chiba University
• Principal Investigator: KONDO Satoru 千葉大学, 大学院・園芸学研究科, 教授 (70264918)
• Co-Investigator(Kenkyū-buntansha): HIRAI Nobuhiro 京都大学, 大学院・農学研究科, 教授 (00165151) ; SUGAYA Sumiko 筑波大学, 大学院・生命科学研究科, 准教授 (90302372)
• Project Period (FY): 2010 – 2012
• Keywords: 果樹

Research Abstract

Effects of shading on the expression of MdTFL1 and MdFT1 genes and the rate of flower bud formation were investigated. In shading treatment, the expression of MdTFL1 was higher than that in non-shading treatment throughout the measuring dates. The shading treatment significantly decreased the flower bud formation rate. We examined the effects of the irradiation of light-emitting diode (LED) of blue or red at night on abscisic acid (ABA) metabolism and anthocyanin formation in grapes. These results suggest that red LED application at night influences endogenous ABA concentrations but does not coincide with anthocyanin formation, and blue LED influences gene expression related to anthocyanin formation, but it does not influence endogenous ABA significantly.

Research Products

• [Journal Article] Application of an analog of 9,10-ketol-octadecadienoic acid (KODA), affected flower bud formation and MdTFL1 and MdFT1 gene expressions in apple buds under heavy-crop and shade conditions (2013)
  • Author(s): M. Kittikorn, M. Yokoyama, N. Watanabe, S. Kondo
  • Journal Title: J. Amer. Soc. Hort. Sci. Volume: 138 Pages: 102-107
  • Peer Reviewed
• [Journal Article] a-Ketol- octadecadienoic acid (KODA) and the expression of MdTFL1 and MdFT1 in apples (2012)
  • Author(s): Kondo, S., Kittikorn M., Okawa, K., Ohara, H., Kotoda, N., Wada M., Yokoyama M., Ifuku, O., Yoshida, S.
  • Journal Title: Acta Hort Volume: 932 Pages: 387-392
  • Peer Reviewed
• [Journal Article] Effects of fruit load, shading, and 9,10-ketol-octadecadienoic acid (KODA) application on MdTFL1 and MdFT1 genes in apple buds (2011)
  • Author(s): Kittikorn M., M. Yokoyama, S. Kondo
  • Journal Title: Plant Growth Regulation Volume: 64 Pages: 75-81
  • Peer Reviewed
• [Presentation] 光質の相違とブドウ果実の ABA代謝およびアントシアニン代謝関連遺伝子の反応 (2013)
  • Author(s): 富山博之・菅谷純子・寺原典彦・平井伸博・近藤 悟
  • Organizer: 園芸学研究
  • Place of Presentation: 東京農工大学
  • Year and Date: 20130323-24
• [Presentation] Effects of 9,10-ketol-octadecadienoic acid (KODA) onthe expression ofMDTFL1 and MdFT1 inflower bud formation of apples (2010)
  • Author(s): Kondo S., Kittikorn M., Kotoda N, Wada M., Yokoyama M.
  • Organizer: 28th International Horticultural Congress
  • Place of Presentation: Lisbon. Portugal
  • Year and Date: 20100822-27