• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Studies on sexuality and its regulation in Japanese persimmon.

Research Project

Project/Area Number 01480046
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 園芸・造園学
Research InstitutionKyoto University

Principal Investigator

SUGIURA Akira  Kyoto Univ., Fac. of Agric., Professor, 農学部, 教授 (00026379)

Co-Investigator(Kenkyū-buntansha) YONEMORI Keizo  Kyoto Univ., Fac. of Agric., Assoc. Prof., 農学部, 助教授 (10111949)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1989: ¥5,000,000 (Direct Cost: ¥5,000,000)
KeywordsSexuality / Flowering habit / Cytokinin / Inhibitor / Floral ontogeny / Diospyros kaki / 花性 / 雌雄混株 / 休眠芽
Research Abstract

We tried to clarify the patterns of sex expression and their regulation in monoecious-type persimmons, and the following results were obtained.
1. The pistillate and staminate floral primordium differentiated in early June and progressed until August when the sepal primordial in pistillate flowers and petal primordial of staminate flowers had become evident. The buds then entered the quiescent, overwintering state. Thus, flower sex of monoecious-type persimmons is determined at a relatively early stage of floral development.
2. The flower type on the current shoots is somehow strongly related to the determination of the flower type, being initiated within the buds on the same shoot. That is, shoots that bore pistillate flowers were differentiating pistillate buds at significantly high rates, while shoots that bore staminate flowers were producing more staminate buds. The bud position on the shoot also corresponded with sex expression, i. e. pistillate flowers emerge from distal mixed bud … More s, whereas staminate flowers arise predominantly from basal nodes.
3. Cytokinin spray to flower buds immediately after budbreak was successful in converting male flowers, into hermaphroditic ones. Moreover, cytokinin was also effective at flower differentiating stages to convert sex expression. In this chse, shoots of 'Taiwan- syoshi' were sprayed with BA at 1000 ppm in June, and they produced shoots bearing hermaphroditic flowers when they had second sprouts in the same year, being compared that control 1-year shoots produced only male-bearing shoots in second sprouts.
4. Endogenous cytokinin and inhibitor activity of male- and female-bearing shoots was examined at flower differentiation time. Methanolic extracts were purified with partitions to organic solvents, and injected into HPLC. The fractions from HPLC were bioassayed with Amaranthus test for cytokinins and rice seedling test for inhibitors, respectively. Several active fractions were obtained for both cytokinins and inhibitors, but they had no differences between male- or female-bearing shoots. Less

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 米森 敬三,亀田 克巳,田尾 龍太郎,杉浦 明: "カキの雌雄性に関する研究(第1報)雄花の着花特性とその分化時期について" 園芸学会雑誌. 58(別1). 46-47 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 米森 敬三,四方 康範,杉浦 明: "カキの雌雄性に関する研究(第2報)サイトカイニンによる雌性化の誘導" 園芸学会雑誌. 59(別2). 230-231 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K.Yonemori,A.Sugiura,K.Kameda,Y.Yomo: "Regalarity and noditication of sex expression in monoecious persimmon." Hort Science. 26(6). 777-777 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 米森 敬三,亀田 克巳,杉浦 明: "カキの雌花,雄花の着花特性について" 園芸学会雑誌. 61. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K.Yonemori,A.Sugiura,K.Tanaka,K.Kameda: "Floral ontogeny and sex determination in monoecious-type persimmons."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yonemori, K. Kameda, R. Tao, and A. Sugiura: "Sexuality in Japanese persimmons. 1. Tendency to differentiation of male flower in male bearing shoots and timing of its differentiation." J. Japan. Soc. Hort. Sci.58 (Suppl. 1). 46-47 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yonemori, Y. Yomo, and A. Sugiura: "Sexuality in Japanese persimmons. 2. Induction of sex conversion in male flower by cytokinin treatment." J. Japan. Soc. Hort. Sci.59 (Suppl. 2). 230-231 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yonemori, A. Sugiura, K. Kameda, and Y. Yomo: "Regularity and modification of sex expression in monoecious persimmon." Hort Science. 26(6). 777 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yonemori, K. Kameda, and A. Sugiura: "Characteristics of sex expression in monoecious persimmons." J. Japan. Soc. Hort. Sci.61. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yonemori, A. Sugiura, K. Tanaka, and K. Kameda: "Floral ontogeny and sex determination in monoecious-type persimmons." J. Amer. Soc. Hort. Sci.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K.Yonemori.,A.Sugiura.,K.Kameda.,Y.Yomo: "Regularity and moditication of sex expression in monoecious persimmon." Hort Science. 26(6). 777-777 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 米森 敬三,亀田 克巳,杉浦 明: "カキの雌花,雄花の着花特性について" 園芸学会雑誌. 61. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] K.Yonemori.,A.Sugiura.,K.Tanaka.,K.Kameda: "Floral ontogeny and sex determination in monoeciousーtype persimmons."

    • Related Report
      1991 Annual Research Report
  • [Publications] 米森 敬三・四方 康範・杉浦 明: "カキの雌雄性に関する研究 (第2報)サイトカイニンによる雌性化の誘導" 園芸学会雑誌. 59別冊2. 230-231 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 米森敬三: "カキの雌雄性に関する研究(第1報)雄花の着花特性とその分化時期について" 園芸学会雑誌. 58別冊1. 46-47 (1989)

    • Related Report
      1989 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi