Mode of Action of Herbicides Affecting Carotenogenesis(Agrochemistry and Biology Series)

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概要

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• Carotenoids (carotenes and xanthophylls) are obligate pigments in the photosynthetic apparatus. They transfer absorbed light to chlorophylls and quench singlet oxygen which otherwise may degrade chlorophyll. Absence of colored carotenoids will lead to bleaching of leaves and death of the plants. Carotenoids have a C_<40> isoprenoid structure with conjugated double bonds. These are formed by processing phytoene via lycopene into beta-carotene. Inhibition of H-abstraction along this pathway produces non-functional, non-colored precursors. Many of such inhibitors have been developed as herbicides, like norflurazon, diflufenican or sulcotrione. Research on the genetic and molecular level has been addressed to phytoene desaturase. The plant-type gene has been sequenced and mutagenized to produce a herbicide-resistant enzyme. A Japanese group has isolated a gene from the bacterium Erwinia uredovora whose enzyme exhibits a striking resistance to many bleaching herbicides. Transgenic resistant tobacco lines have been engineered.

• 日本農薬学会の論文
• 1996-11-20

著者

• Boger Peter

  Department Of Plant Physiology And Biochemistry University Of Konstanz

関連論文

• S-2 Carotenoid biosynthesis : inhibition and how to measure it
• Carotenoid biosynthesis : inhibition and how to measure it
• Mode of Action of Herbicides Affecting Carotenogenesis(Agrochemistry and Biology Series)
• Finding the Target Site of Chloroacetamides:A Thorny Subject(〔日本農薬〕学会賞受賞論文)

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