Effect of Heat Stress on Photosynthetic Activity and Chloroplast Ultrastructure in Correlation with Endogenous Cytokinin Concentration in Maize Seedlings

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概要

• 論文の詳細を見る

• The effect of heat stress (47.5℃ for 2 min given to the roots) on photosynthetic activity and chloroplast ultrastructure was studied in correlation with the endogenous cytokinin concentration in maize (Zea mays L. "Fronica") seedlings. Shoot and root growth were visibly inhibited by the heat treatment. In etiolated leaf segments there was a clear-cut inhibition of photosynthetic activity, chlorophyll accumulation and chloroplast development. This inhibition was reversible by benzyladenine. In green tissue heat stress only affected photosynthetic activity and chlorophyll accumulation. Again this inhibition could be reversed by benzyladenine. In the primary leaves of green seedlings heat stress lowered cytokinin concentration severely; in etiolated leaves no effect of heat stress could be observed, since the cytokinin concentration was below the detectable level. Our results provide an indication for a correlation between hormonal control and chloroplast biogenesis.

• 日本植物生理学会の論文

著者

• Onckelen Henri

  Department Of Biology Uia Universiteitsplein

• Rudelsheim Patrick

  Department of Biology

• Horemans Stefaan

  Department of Biology

• Caers Marleen

  Laboratorium voor Plantenfysiologie van K.U. Leuven

• Rudelsheim Patrick

  Department Of Biology University Of Antwerpen

• Horemans S

  Department Of Biology Uia

• Onckelen Henri

  Department Of Biology University Of Antwerpen Uia Universiteitsplein

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• Effect of Heat Stress on Photosynthetic Activity and Chloroplast Ultrastructure in Correlation with Endogenous Cytokinin Concentration in Maize Seedlings
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