Evidence of Chlorophyll Synthesis Pathway Alteration in Desiccated Barley Leaves

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概要

• 論文の詳細を見る

• In etiolated leaves, saturating flash of 200 ms induces phototransformation of protochlorophyllide (Pchlide) F655 into chlorophyllide (Chlide), then into Chl through reactions which do not need light sensibilisation. The synthesis of Chl is known to be slowed down in etiolated leaves exposed to desiccation stress. In order to analyse the intensity and time-course of Chlide transformation into Chl, we used the fluorescence emission of etiolated leaves previously exposed to a 200 ms saturating flash. We used lowtemperature fluorescence spectroscopy to reveal the inhibition site of Chl synthesis in etiolated barley leaves exposed to water stress. Shibata shift appears as the main target point of the water deficit. It was found that water deficit inhibits partially active Pchlide F655 regeneration. Also, esterification of Chilide into Chl is impaired. It appears that these inhibitory effects alter the appearance of PSII active reaction centres.

• 日本植物生理学会の論文

著者

• Popovic R

  Department Of Chemistry Toxen University Of Quebec In Montreal

• Le Lay

  Department of Chemistry, TOXEN, University of Quebec in Montreal

• Eullaffroy Philippe

  Department of Chemistry, TOXEN, University of Quebec in Montreal

• Juneau Philippe

  Department of Chemistry, TOXEN, University of Quebec in Montreal

• Popovic Radovan

  Department of Chemistry, TOXEN, University of Quebec in Montreal

• Le Lay

  Department Of Chemistry Toxen University Of Quebec In Montreal

• Juneau Philippe

  Department Of Chemistry Toxen University Of Quebec In Montreal

• Eullaffroy Philippe

  Department Of Chemistry Toxen University Of Quebec In Montreal

• Juneau Philippe

  Department Of Biological Sciences Toxen Ecotoxicology Of Aquatic Microorganisms Laboratory Universite Du Quebec A Montreal Succursale Centre-ville

関連論文

• Evidence of Chlorophyll Synthesis Pathway Alteration in Desiccated Barley Leaves
• Effects of iron on the growth and minimal fluorescence yield of three marine Synechococcus strains (Cyanophyceae)

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