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PMID: 16658114 Published · ppublish English Journal Article

Biochemical and Biophysical Characteristics of a Photosynthetic Mutant of Euglena gracilis Blocked in Photosystem II.

Plant physiology ·Vol. 50 ·No. 1 ·1972-07-00 ·Pages 161-5

Schwelitz FD, Dilley RA, Crane FL

Abstract

A photosynthetic mutant of Euglena gracilis, Z strain, thought to be blocked in the electron transport chain between the two photosystems and to have a missing or nonfunctional primary acceptor for photosystem II, was further studied and characterized. The data from low temperature fluorescence spectra, delayed light emission, and electron paramagnetic resonance support the previous work.The mutant was shown to lack plastoquinone A and possibly cytochrome b(559) but to possess plastoquinone B and a higher complement of carotenoids, especially xanthophylls, than the wild type.The results are consistent with the postulated role of plastoquinone as the primary electron acceptor for photosystem II and as responsible for the electron paramagnetic resonance signal II. The abundance of xanthophylls in the mutant can be explained by the protective role of carotenoids against photosensitized reactions.

Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Schwelitz F D
Charles F. Kettering Research Laboratory, Yellow Springs, Ohio 45387.
Dilley R A
Crane F L
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21 references, click to expand
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.50.1.161
Published
1972-07-00
Pages
161-5
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC367334
External Links
PubMed source DOI: 10.1104/pp.50.1.161 PMC Full Text View journal details
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