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Control of cell expansion and cortical microtubule arrangement by plant hormones

Research Project

Project/Area Number 03640575
Research Category

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

Allocation TypeSingle-year Grants
Research Field 植物生理学
Research InstitutionInternational Christian University

Principal Investigator

KATSUMI Masayuki  International Christian University, College of Liberal Arts, Professor, 教養学部, 教授 (10052242)

Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1991: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsABA / brassinolide / cell elongation / cortical microtubule / gibberellin / uniconazole / dwarfism / アブシジン酸 / ウニコナゾ-ル / キュウリ胚軸 / 微小管の配向 / 矮性トウモロコシ / 幼葉鞘
Research Abstract

1 Relationship between gibberellin (GA)-induced stimulation and ABA-induced inhibition of hypocotyl elongation and changes in the pattern of cortical microtubule (MT) arrangement was examined using light-grown cucumber seedlings. In the tangential surface of epidermal cells, the predominant pattern of MT arrangement was oblique, while in the radial surface of epidermal cells and cortex cells, MT arrangement was mostly transverse. GA increased and ABA decreased cells with transversely arranged MT. GA and ABA counteracted to each other. The frequency of the occurrence of cells with trasversely arranged MT in the tangential surface of the epidermis was found to be highly correlated to the growth rate of the hypocotyl, suggesting that the epidermis is an essential tissue for hypocotyl elongation.
2 Relationship between the growth and the pattern of MT arrangement in the tangential surface of epidermal cells of the coleoptile was examined using D_8, a putative GA-receptor dwarf mutant of maize, and its normal sib. The length of the coleoptile as well as the cell length in D_8 seedlings was shorter than those in normal seedlings. In D_8, cells with obliquely and longitudinally arranged MT are dominant, while in normal those with transversely arranged MT are dominant. Treatment with uniconazole, a GA biosynthesis inhibitor, inhibited the growth of the coleoptile and increased cells with obliquely and longitudinally arranged MT in both D_8 and normal. The growth of the coleoptile seems to be controlled by endogenous GA through its control of MT arrangement.
3 Brassinolide, a new plant hormone, also had an effect on MT arrangement similar to that of GA in the epidermal cells of light-grown cucumber hypocotyls.
4 The in vitro formation of microtubules from tubulins extracted from etiolated pea seedlings was stimulated by GA and brassinolide.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Ishida,K.& Katsumi,M.: "Effects of gibberellin and abscisic acid on the cortical microtubule orientation in hypocotyl cells of light-grown cucumber seedlings" International Journal of Plant Science. 153. 155-163 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Katsumi,M.& Tanaka,S.: "Expression of dwarfism in the coleoptile of a putative GA-receptor mutant of maize,D8-Cortical microtubule arrangement and cell size" Plant Physiology. 99(suppl). 52- (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Katsumi,M.& Tanaka,S.: "Effect of uniconazole on the growth and cortical microtubule arrangement in the coleoptile of normal and D8(a putative GA-receptor mutant)maize" Proc.Plant Growth Regulator Society of America. 181-182 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishida,K and Katsumi,M: "Effects of gibberellin and abscisic acid on the cortical microtubule orientation in hypocotyl cells of light-grown cucumber seedlings" International Journal of Plant Science. 153. 155-163 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Katsumi,M. and Tanaka,S: "Expression of dwarfism in the coleoptile of a putative GA-receptor mutant of maize, D8 --Cortical microtubule arrangement and cell size" Plant Physiology. 99(suppl). 52 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Katsumi,M. and Tanaka,S: "Effect of uniconazole on the growth and cortical microtubule arrangement in the coleoptile of normal and D_8(a putative GA-receptor mutant)maize" Proc.Plant Growth Regulator Society of America. 181-182 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishida,K.& Katsumi,M.: "Effects of gibberellin and abscisic acid on the cortical microtubule orientation in hypocotyl cells of light-grown cucumber seedlings" International Journal of Plant Science. 153. 155-163 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Katsumi,M.& Tanaka,S.: "Expression of dwarfism in the coleoptile of a putative GA-receptor mutant of maize,D8-Cortical microtubule arrangement and cell size" Plant Physiology. 99(suppl). 52- (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ishida,Kyoko: "Effects of gibberellin and absusic acid on the cortical microtubule orientation in hypocotyl cells of lightーgrown cucumber seedlings" International Journal of Plant Science. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Katsumi,Masayuki: "Expression of dwarfism in the coleoptile of a putative GAーreceptor mutan of zea mays L.ーCortical Microtubule arrange ment and cell size"

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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