Circular dichroism spectra of granal and agranal chloroplasts of maize

Granum-containing chloroplasts from mesophyll cells of maize (Zea mays L. var. MV 861) leaves exhibited circular dichroism spectra with a large double signal; peaks at 696 nm (+) and 680 nm (-). In the circular dichroism spectra obtained with agranal chloroplasts of bundle sheath cells, this large d...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1973-07, Vol.52 (1), p.54-56
Main Authors: Faludi-Daniel, A, Demeter, A, Garay, A.S
Format: Article
Language:English
Subjects:
Absorption spectra
Chlorophylls
Chloroplasts
Corn
Dichroism
field crops
Grana
Mesophyll
Pigments
plant biochemistry
plant physiology
Plants
Salts
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Summary:Granum-containing chloroplasts from mesophyll cells of maize (Zea mays L. var. MV 861) leaves exhibited circular dichroism spectra with a large double signal; peaks at 696 nm (+) and 680 nm (-). In the circular dichroism spectra obtained with agranal chloroplasts of bundle sheath cells, this large double signal is absent. Separation of grana lamellae, in a medium of low salt concentration and in KSCN solution, resulted only in a slight decrease of the amplitude, while upon treatment with digitonin the large double signal disappeared. A negative signal of the chlorophyll b peak at 654 nm was observed in the case of both granal and agranal chloroplasts, and it was not affected either by low salt or by digitonin treatment. A positive peak at about 515 nm was higher in granal than in agranal chloroplasts.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.52.1.54