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

Research on biosynthesis of UV absorbing substances in epidermis of plant leaves and their function to protect the plants from injury by UV radiation.

Research Project

Project/Area Number 63540543
Research Category

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

Allocation TypeSingle-year Grants
Research Field 植物生理学
Research InstitutionThe National Institute for Environmental Studies

Principal Investigator

KONDO Noriaki  The National Institute for Environmental Studies, Environmental Biology Div., Head of Physiology & Biochemistry Section, 生物環境部, 室長 (60124343)

Co-Investigator(Kenkyū-buntansha) 島崎 研一郎  国立公害研究所, 生物環境部, 主任研究員 (00124347)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1989: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1988: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsPea / Cucumber / Chlorosis / Glutathione reductase / UV absorbing substances / Growth retardation / UV-A / UVーB / 紫外線感受性 / ス-パ-オキシドジスムタ-ゼ / Argenteum / クロロフィルa__-蛍光 / 紫外線防御 / ソラマメ / フラボノイド / UV-C
Research Abstract

Radiation of ultraviolet-B (UV-B) region (280-320nm) causes growth retardation of plants and visible injury such as chlorosis on leaf surface. These damages seem to be under the control of the environmental conditions during plant growth. The extent of damage is thought to depend on the differences of content of ultraviolet (UV) absorbing substances in the epidermis of plant leaves. In the present studies, the content of UV absorbing substances in leaf epidermis of pea mutant and broad bean was compared with resistance of these plants to ultraviolet-C (UV-C). In the next experiments, effects of UV-B radiation on first leaves of cucumber plants and effects of environmental conditions on the sensitivity of plant to UV-B were examined. Effects of UV-B radiation on enzymic properties of glutathione reductase (GR), rate-limiting enzyme in metabolic pathway to detoxify hydrogen peroxide, were also examined. Outline of the results obtained are as follows.
(1)Epidermis of pea leaves has flavono … More id-like substances, which have absorbance peaks at 260 and 320 ns and little absorbance in visible region. The content of these substances showed a parallelism with resistance to UV-B radiation.
(2)UV-B irradiation caused the growth retardation of cotyledons and first leaves of cucumber seedlings and chlorosis on first leaves at 20゚C. But, the growth retardation could not be found on the irradiation at 25゚C, though chlorosis was observed.
(3)high intensity of ultraviolet-A (UV-A) restored the retardation of growth of first leaves when it was given together with UV-B. But, chlorosis caused by UV-B was not restored by UV-A radiation.
(4)UV-B radiation lowered the affinity of GR in cotyledons to substrates. It was clarified in the present work that the sensitivity of cucumber plants to UV-B was dependent on temperature and light condition at the time of UV-B radiation. Mechanism of plant damage caused by UV-B radiation, defense mechanism to UV-B and, in addition, effects of environmental conditions on biosynthesis of UV absorbing substances must be more investigated. Less

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Noriaki Kondo,Kazuhiko Kawaguchi: "Effects of ultraviolet-Aradiation on plant damage caused by ultraviolet-B radiation" Plant Cell Physiol.(1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Noriaki Kondo and Kazuhiko Kawaguchi: "Effects of ultraviolet-A radiation on plant damage caused by ultraviolet-B radiation." Plant Cell Physiol.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Ken-ichiro Shimazaki: Physiologia Plantarum. 74. 34-38 (1988)

    • Related Report
      1988 Annual Research Report

URL: 

Published: 1988-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi