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Studies of reproductive characters in Laurales as a tool for oriqin of monocots

Research Project

Project/Area Number 06454031
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 系統・分類
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TOBE Hiroshi  Kyoto University, Faculty of Integrated Human Studies, Professor, 総合人間学部, 教授 (60089604)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Masamichi  Kagawa University, Faculty of Education, Professor, 教育学部, 教授 (00154865)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1996: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1995: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1994: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordspollen / Laurales / Gomortegaceae / Monimiaceae / Embryology / fossil / palynology / Lauraceae / pollen / クシノキ目 / ハスノハギリ科 / Hortonia / ハスノハギリ属 / Gyrocarpus / Ocotea
Research Abstract

Tobe investigated embryology of Monimiaceae and Gomortegaceae and observed anatomical development of anthers, ovules, and seeds. Takahshi worked with Lauraceae a tectate pollen and additionally worked with fossil pollen from Cretaceous of Fukushima Pref.in order to contribute to understanding of the geographic depth of origin of monocotyledons.
Concerning embryology of lauralean families, four of the five subfamilies of monimiaceae (Hortonioideae, Atherspermoideae, Siparunoideae, and Mollinedioideae) were studied. As a result, Monimiaceae were found to have an outer integument shorter than an inner integument, non-pachychalazal ovules or seeds. In addition, as incompletely reported previously, the family, for instance, Atherospermoideae, have a glandular, rather than amoeboid, anther tapetum. Gomortegaceae also were found to have non-pachychalazal ovules or seeds in agreement with Monimiaceae, but, unlike Monimiaceae, were clarified to have an outer integument as long as an inner integument for the first time.
As regards pollen of Lauraceae, it was discussed that it is classified as a non-aperturate pollen destitute of tectum but has an extremely thin sporopollenin wall with micropapillae dispersed on surface. Intine is thick, in which tuberous structures are characteristically radially interspersed. Fossil pollen from late Cretaceous of Fukushima Pref.is likely to be one of monocots, suggesting that monots were already diversified early in evolution of angiosperms.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] Takahashi, M.: "Stellicalyx capilatus gen et sp, nov, a new fossil angiosperm flower from the Futaba group of northeastern Japan." Journal of Plant Research. 108(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takahashi, M.: "Fossil spores and pollen grains of Cretaceous from Sakhalin, Russia" Journal of Plant Research. 108(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takahashi, M.: "Stellicalyx capillatus gen.et sp.nov. ; a new fossil angiosperm flower from the Futaba group (Upper Cretaceous) of northeastern Japan" J.Plant Res.(accepted). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takahashi, M.: "Fossil spores and pollen grains of Cretaceous (Upper Campanian) from Sakhalin, Russia" J.Plant Res.(accepted). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Heo, K. & H. Tobe: "Embryology and relationships of Gyrocarpus and Hernandia(Hernandiaceas)." Journal of Plant Research. 108. 327-341 (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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