Inhibition by Cyanide of the Photochemical Activity of Isolated Chloroplasts

Nature ◽  
1955 ◽  
Vol 176 (4476) ◽  
pp. 307-308 ◽  
Author(s):  
NORMAN I. BISHOP ◽  
JOHN D. SPIKES
Keyword(s):  
Photochemical Activity ◽  
Isolated Chloroplasts

Effects of aging on chlorophyll fluorescence and photosystem II electron transport in isolated chloroplasts

1975 ◽  
Vol 53 (23) ◽  
pp. 2842-2845 ◽  
Author(s):  
M. Fragata
Keyword(s):  
Fatty Acids ◽  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Conformational Changes ◽  
Photochemical Activity ◽  
Photosynthetic Membrane ◽  
Fluorescence Characteristics ◽  
Protein Molecules ◽  
Effects Of Aging ◽  
Isolated Chloroplasts

The correlation between emission of energy and photochemical activity in isolated chloroplasts during aging was investigated. It was shown that aging hinders the intensity of chlorophyll-a fluorescence with a concomitant decrease of the photosystem II activity. In view of the parallelism between the action of exogenous fatty acids, especially C18-unsaturated acids, and the effects of aging, it is suggested that the thylakoid transformation during aging could result partly from conformational changes of the membrane polypeptides due to the presence of free fatty acids in the neighborhood of the protein molecules. It is possible that such a mechanism of fatty acid action may alter the fluorescence characteristics of chlorophyll as well as the tunneling of electrons in the photosynthetic membrane.

Inhibition of Photochemical Activity of Isolated Chloroplasts by Acylanilides

Weeds ◽  
1963 ◽  
Vol 11 (1) ◽  
pp. 55 ◽  
Author(s):  
D. E. Moreland ◽  
K. L. Hill
Keyword(s):  
Photochemical Activity ◽  
Isolated Chloroplasts

Development of Photochemical Activity in Chloroplast Membranes. II. Studies With a Mutant of Barley Grown Under Different Environments

1977 ◽  
Vol 4 (3) ◽  
pp. 439 ◽  
Author(s):  
RM Smillie ◽  
NC Nielsen ◽  
KW Henningsen ◽  
DV Wettstein
Keyword(s):  
Light Intensity ◽  
Developmental Stages ◽  
Chloroplast Development ◽  
Nuclear Gene ◽  
Photochemical Activity ◽  
Hordeum Vulgare L ◽  
Chloroplast Membranes ◽  
Photochemical Activities ◽  
Gene Mutant ◽  
Isolated Chloroplasts

Chloroplast development in the barley mutant xantha-b12, a nuclear gene mutant derived from Hordeum vulgare L. cv. Sval�fs Bonus, was profoundly influenced by the temperature and light intensity to which the plants were subjected during growth. Low temperatures and high light intensities retarded chloroplast development. By growing this mutant under different combinations of temperature and light intensity, seedlings were produced containing chloroplasts at different developmental stages. Measurements of photochemical activities of the isolated chloroplasts indicated a sequence for development of photochemical competence in chloroplast membranes very similar to that adduced from a study of several different barley mutants grown under a single environment. A photoreductive capacity is initially acquired but energy conservation sites only become fully functional at an advanced stage of membrane development.

Inhibition of the photochemical activity of isolated chloroplasts. I. Salts

1955 ◽  
Vol 55 (1) ◽  
pp. 25-37 ◽  
Author(s):  
John D. Spikes ◽  
Rufus Lumry ◽  
John S. Rieske
Keyword(s):  
Photochemical Activity ◽  
Isolated Chloroplasts
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