Photosynthetic Properties of ac-31, a Mutant Strain of Chlamydomonas reinhardi Devoid of Chloroplast Membrane Stacking 1
AUTOR(ES)
Goodenough, Ursula W.
RESUMO
A pale-green mutant strain of Chlamydomonas reinhardi, ac-31, is characterized by the absence of any stacking of its chloroplast membranes. The capacity for photosynthetic electron transport, phosphorylation, and CO2 fixation in ac-31 is substantial, and it is concluded that these photosynthetic activities occur within the single membrane. The photosynthetic capacities of wild type and ac-31 as a function of increasing light intensity are compared. Saturation is attained at higher light intensities in ac-31, and the kinetics of the 2 sets of curves are distinctly different. The possibility that energy transfer is enhanced by membrane stacking is suggested by these results. The repeatedly-observed correlation between reduced stacking and disfunctional Photosystem II activities is discussed in view of the observation that ac-31 has no stacking but retains a functional Photosystem II.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=396204Documentos Relacionados
- Characterization of a Photosynthetic Mutant Strain of Chlamydomonas reinhardi Deficient in Phosphoribulokinase Activity 1
- Morphological and Photosynthetic Properties of Digitonin-treated Chloroplast Membranes from the Wild-type and ac-5 Strains of Chlamydomonas reinhardi1
- Chloroplast Ultrastructure in Mutant Strains of Chlamydomonas reinhardi Lacking Components of the Photosynthetic Apparatus 1
- Photosynthetic Reactions by Chloroplast Fragments of Chlamydomonas reinhardi12
- The Effect of Manganese on Chloroplast Structure and Photosynthetic Ability of Chlamydomonas reinhardi1