Protochlorophyllide phototransformation in the bundle sheath cells of Zea mays

Journal of Photochemistry and Photobiology. B, Biology
Mathieu MarchandRadovan Popovic

Abstract

The protochlorophyllide transformation process was investigated by using comparative analysis of 77 K fluorescence spectral changes occurring in isolated bundle sheath (BS) cells of etiolated Zea mays leaves after being exposed to a 200 ms saturating flash. Deconvolution analysis of the fluorescence spectra showed essential differences in the ratio of protochlorophyll(ides) and chlorophyll(ides) spectral forms indicating for BS cells to have a characteristic pathway of protochlorophyllide transformation. Bundle sheath cells showed a high ratio between non-photoactive protochlorophyll(ide)-F632 and photoactive protochlorophyllide-F655. In those cells, the 200 ms flash triggered a preferential formation of chlorophyll(ide)-F675 which remained stable in the dark for at least 90 min. Isolated BS cells showed an accumulation of chlorophyll(ide)-F675 resulting in the formation of inactive photosystem II. However for mesophyll cells of intact leaves, it was found to have a high ratio between photoactive and non-photoactive protochlorophyll(ide), showing the succession of chlorophyll(ide) forms usually known in C(3) plants. Protochlorophyllide phototransformation pathway in BS cells related to early stages of plastid differentiation tr...Continue Reading

References

Oct 18, 2005·Photosynthesis Research·V P Domanskii, W Rüdiger
Oct 28, 2005·Photosynthesis Research·B Schoefs
Jan 1, 1973·Plant Physiology·P Mathis, K Sauer
Oct 1, 1982·Plant Physiology·R P Oliver, W T Griffiths

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Citations

Nov 11, 2010·Pakistan Journal of Biological Sciences : PJBS·Mohammad Reza Amirjani

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