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Journal of Cell Science, Vol 7, 587-621, Copyright © 1970 by Company of Biologists

Submitted on January 31, 1970
Revised on June 15, 1970

Macromolecular Physiology of Plastids

VI. Changes in Membrane Structure Associated with Shifts in the Absorption Maxima of the Chlorophyllous Pigments

K. W. HENNINGSEN 1

1 Institute of Genetics, University of Copenhagen, Øster Farimagsgade 2A, DK-1353 Copenhagen K., Denmark

Dispersal of the prolamellar body tubules into primary lamellar layers has been studied in leaves of dark-grown bean seedlings (Phaseolus vulgaris L.). Following complete photoconversion of protochlorophyllide the dispersal process can proceed in either light or darkness. The dispersal is reversibly inhibited in leaves at o °C. Above o °C the time course for the dispersal is temperature dependent. The spectral shift of the in vivo absorption maximum of newly formed chlorophyllide from 684 to 672 nm is also inhibited at o °C and the time course is temperature-dependent in a manner similar to that of the membrane dispersal. A causal connexion between the 2 phenomena can thus be suggested. Derangement of the tubular membranes produced by heat treatment or by freezing and thawing in darkness causes the appearance of photoactive protochlorophyllide absorbing at 635 nm. Photoconversion of protochlorophyllide 635 nm results in chlorophyllide absorbing at 672 nm and further dissociation of the membranes. Denaturation of the prolamellar body membranes by heating or by slow thawing results in the formation of photoinactive protochlorophyllide absorbing at 632 nm.

Submitted on January 31, 1970
Revised on June 15, 1970




This article has been cited by other articles:


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A. F. Abdelkader, H. Aronsson, K. Solymosi, B. Boddi, and C. Sundqvist
High salt stress induces swollen prothylakoids in dark-grown wheat and alters both prolamellar body transformation and reformation after irradiation
J. Exp. Bot., July 1, 2007; 58(10): 2553 - 2564.
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© The Company of Biologists Ltd 1970