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cje ›› 2005, Vol. ›› Issue (3): 315-320.

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Research advances in response of seed plants to enhanced ultraviolet-B radiation

REN Jian1,2,3, LI Chunyang 1   

  1. 1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
    2. Graduate Shool of Chinese Academy of Sciences, Beijing 100039, China;
    3. Yunnan Agricultural University, Kunming 650201, China
  • Received:2004-04-19 Revised:2004-08-26 Online:2005-03-10

Abstract: Depletion of ozone leads to the increase of Ultraviolet-B radiation on the surface of the Earth.Enhanced UV-B would affect the growth of plants at different extent.This review summarized the research advances in response of seed plants to enhanced Ultraviolet-B radiation in recent years.According to previous studies,higher plants sensitive to UV-B decreased in plant height,leaf area and stem length,with the integrity of chloroplast structure damaged.Photosynthetic organs,genetic material,and proteins etc.are the main targets of UV-B.In order to alleviate the harmful effects of UV-B,plants developed a range of protective mechanisms,including the dispersion and reflectance of UV-B by epicuticular structure and leaf thickening,accumulation of UV-absorbing compounds,reparation of DNA damage and elimination of active radicals.In addition,UV-B significantly interacted with drought and elevated CO2.Research on response of woody plant and ecosystem to enhanced UV-B radiation should be emphasized in the future.

Key words: Rice, Genotype, Dry matter accumulation, Crop growth rate (CGR), Leaf area index (LAI), Spikelet/ leaf area ratio

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