Photoinduced changes in the chlorophyll a to chlorophyll b ratio in young bean plants.
TLDR
Transfer of the etiolated tissue to continuous illumination after a number of such light exposures results in a dramatic drop of the chlorophyll a:chlorophyll b ratio to values normally found in green plants.Abstract:
An alternating light-dark system is described under which etiolated bean (Phaseolus vulgaris) leaves form selectively chlorophyll a.This system consists of cycles of 2 minutes of white light alternating with 98-minute dark periods.Etiolated tissue exposed to a series of such light-dark cycles accumulates chlorophyll a predominantly, with no lag phase in its biosynthesis. A very high ratio of chlorophyll a:chlorophyll b is thus established. The ratio increases with the number of light exposures up to about 45 such exposures and then it declines. Transfer of the etiolated tissue to continuous illumination after a number of such light exposures results in a dramatic drop of the chlorophyll a:chlorophyll b ratio to values normally found in green plants.read more
Citations
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Formulae for Determination of Chlorophyllous Pigments Extracted with N,N-Dimethylformamide
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Dynamics of photosynthetic membrane composition and function
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Physiological and Molecular Studies of Light-Regulated Nuclear Genes in Higher Plants
TL;DR: Comparing Transcription and mRNA Abundance and In Vitro Experiments, and the Ferredoxin System, are compared.
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Differentiation of chloroplast lamellae. Light harvesting efficiency and grana development
TL;DR: Incomplete development of chloroplast lamellae occurred when etiolated pea plants were greened under cycles of 2 min light, 118 min dark, and a biphasic decrease in quantum requirement for whole chain electron transport correlated directly with the appearance of grana during the final steps of membrane assembly.
References
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Journal ArticleDOI
Protochlorophyllide Resynthesis in Dark-Grown Bean Leaves
TL;DR: The resynthesis of protochlorophyllide following a single irradiation and the rate of the 685 to 673 mmu shift of the newly formed chlorophyll was examined.
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Effects of Intermittent and Continuous Light on the Chlorophyll Formation in Etiolated Plants at Various Ages
TL;DR: The effect of the tissue age of dark-grown bean plants on the chlorphyll formation under continuous illumination or short impulses of white light has been studied and it was found that the protochlorophyllide present in the tissue is age-dependent and reaches a plateau at about 10 days of age.