Elucidation of regulation mechanism and ecological roles of rhizome enlargement in lotus with regard to phytochrome

• Project/Area Number: 19580036
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Horticulture/Landscape architecture
• Research Institution: Kyushu University
• Principal Investigator: OZAKI Yukio Kyushu University, 大学院・農学研究院, 准教授 (60253514)
• Co-Investigator(Kenkyū-buntansha): OKUBO Hiroshi 九州大学, 大学院・農学研究院, 教授 (80150506)
• Research Collaborator: MASUDA Jun-ichiro 九州大学, 熱帯農学研究センター, 講師(研究機関研究員) (60452744)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 野菜 / 遺伝子発現 / 休眠 / フィトクロム

Research Abstract

Rhizome enlargement occurred in the lotus plants that received the signal of short daylength with one or some of the leaves. Covering with low (red light / far red light) ratio films accelerated rhizome enlargement of the plants even in the long daylength. It was demonstrated that rhizome enlargement started two weeks after short daylength treatments, and it was suggested that gibberellins regulated the rhizome growth (elongation or enlargement). Enlarged rhizomes had dormancy and the dormancy could break by the low temperature treatments.

Research Products

• [Journal Article] 食用ハス(レンコン)の根茎肥大に関する研究 (2009)
  • Author(s): 増田順一郎, 尾崎行生, 大久保敬
  • Journal Title: 農業および園芸 84巻 Pages: 334-340
• [Journal Article] 食用ハス(レンコン)の根茎肥大に関する研究 (2009)
  • Author(s): 増田順一郎, 尾崎行生, 大久保敬
  • Journal Title: 農業および園芸 84 Pages: 334-340
• [Journal Article] Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera) (2007)
  • Author(s): Masuda, J., Y. Ozaki, H. Okubo
  • Journal Title: Planta 226巻 Pages: 909-915
  • Peer Reviewed
• [Journal Article] Rhizome transition to storage organ is under phytochrome control in lotus(Nelumbo nucifera) (2007)
  • Author(s): Masuda, ら
  • Journal Title: Planta 226 Pages: 909-915
  • Peer Reviewed
• [Presentation] 短日処理開始時期が食用ハスの根茎肥大に及ぼす影響 (2008)
  • Author(s): 増田順一郎・尾崎行生・宮島郁夫・大久保敬
  • Organizer: 平成20年度園芸学会秋季大会
  • Place of Presentation: 三重大学
  • Year and Date: 2008-09-27
• [Presentation] Possibility of phytochrome-dependent abscisic acid regulation in rhizome transition to storage organ in lotus (Nelumbo nucifera) (2008)
  • Author(s): Masuda, J., Y. Ozaki, H. Okubo
  • Organizer: Xth International Symposium of Flower Bulbs
  • Place of Presentation: オランダ
  • Year and Date: 2008-04-21
• [Presentation] Possibility of phytochrome-dependent abscisic acid regulation in rhizome transition to organ in lotus (Nelumbo nucifera) (2008)
  • Author(s): Masuda, J., Y. Ozaki, H. Okubo
  • Organizer: Xth Intl. Symp. Flower Bulbs
  • Place of Presentation: オランダ