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

Abstract

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

CLC Number:

Q948

REN Jian, LI Chunyang . Research advances in response of seed plants to enhanced ultraviolet-B radiation[J]. cje, 2005, (3): 315-320.

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