chlorophyll-a and fluridone

chlorophyll-a has been researched along with fluridone* in 2 studies

Other Studies

2 other study(ies) available for chlorophyll-a and fluridone

Article	Year
Relationship between the degree of carotenoid depletion and function of the photosynthetic apparatus. Journal of photochemistry and photobiology. B, Biology, 2009, Jul-17, Volume: 96, Issue:1 Fluridone, an inhibitor of the carotenoid biosynthesis, was used to study the relationship between the degree of carotenoid depletion and the function of the photosynthetic apparatus. The data reveal that, at a small reduction of the carotenoid content (25% decrease of the total carotenoids), the PSII and PSI (oxidation of P700 by far-red light) photochemistry is not influenced, while the oxygen evolution is strongly inhibited. Further reduction of the total carotenoid content (more than 40%) leads to decrease of the chlorophyll content and inhibition of the functions of both photosystems as the effect on the photosynthetic oxygen evolution and primary photochemistry is stronger than the effect on P700 oxidation. The analysis of the oxygen production under continuous illumination and flash oxygen yields suggests that the inhibition of the oxygen evolution is caused mainly by the damage of PSIIalpha centers. Topics: Carotenoids; Chlorophyll; Fluorescent Dyes; Herbicides; Oxidation-Reduction; Oxygen; Photosynthesis; Photosystem I Protein Complex; Photosystem II Protein Complex; Pisum sativum; Pyridones; Spectrometry, Fluorescence; Temperature	2009
Role of carotene in the rapid turnover and assembly of photosystem II in Chlamydomonas reinhardtii. FEBS letters, 1997, Jan-06, Volume: 400, Issue:3 Inhibitors of the phytoene desaturase in carotene biosynthesis were tested in the enhanced rapid turnover of the D1 protein of photosystem II in high light exposure of Chlamydomonas reinhardtii cells. After 1 h high light on heterotrophically grown cells in the presence of norflurazon or fluridone, photosynthesis activity in vivo and PS II activity in vitro is lost. The D1 protein has disappeared. PS I activity is not affected, nor is the D2 protein. It is concluded that beta-carotene is essential for the assembly of the D1 protein into functional photosystem II. It is suspected that bleaching of beta-carotene in the reaction center of PS II by high light destabilizes the structure and triggers the degradation of the D1 protein. Topics: Animals; beta Carotene; Chlamydomonas reinhardtii; Chlorophyll; Light; Light-Harvesting Protein Complexes; Oxidoreductases; Photosynthesis; Photosynthetic Reaction Center Complex Proteins; Photosystem II Protein Complex; Pyridazines; Pyridones	1997

Article

Year

Relationship between the degree of carotenoid depletion and function of the photosynthetic apparatus.

Journal of photochemistry and photobiology. B, Biology, 2009, Jul-17, Volume: 96, Issue:1

Fluridone, an inhibitor of the carotenoid biosynthesis, was used to study the relationship between the degree of carotenoid depletion and the function of the photosynthetic apparatus. The data reveal that, at a small reduction of the carotenoid content (25% decrease of the total carotenoids), the PSII and PSI (oxidation of P700 by far-red light) photochemistry is not influenced, while the oxygen evolution is strongly inhibited. Further reduction of the total carotenoid content (more than 40%) leads to decrease of the chlorophyll content and inhibition of the functions of both photosystems as the effect on the photosynthetic oxygen evolution and primary photochemistry is stronger than the effect on P700 oxidation. The analysis of the oxygen production under continuous illumination and flash oxygen yields suggests that the inhibition of the oxygen evolution is caused mainly by the damage of PSIIalpha centers.

Topics: Carotenoids; Chlorophyll; Fluorescent Dyes; Herbicides; Oxidation-Reduction; Oxygen; Photosynthesis; Photosystem I Protein Complex; Photosystem II Protein Complex; Pisum sativum; Pyridones; Spectrometry, Fluorescence; Temperature

2009

Role of carotene in the rapid turnover and assembly of photosystem II in Chlamydomonas reinhardtii.

FEBS letters, 1997, Jan-06, Volume: 400, Issue:3

Inhibitors of the phytoene desaturase in carotene biosynthesis were tested in the enhanced rapid turnover of the D1 protein of photosystem II in high light exposure of Chlamydomonas reinhardtii cells. After 1 h high light on heterotrophically grown cells in the presence of norflurazon or fluridone, photosynthesis activity in vivo and PS II activity in vitro is lost. The D1 protein has disappeared. PS I activity is not affected, nor is the D2 protein. It is concluded that beta-carotene is essential for the assembly of the D1 protein into functional photosystem II. It is suspected that bleaching of beta-carotene in the reaction center of PS II by high light destabilizes the structure and triggers the degradation of the D1 protein.

Topics: Animals; beta Carotene; Chlamydomonas reinhardtii; Chlorophyll; Light; Light-Harvesting Protein Complexes; Oxidoreductases; Photosynthesis; Photosynthetic Reaction Center Complex Proteins; Photosystem II Protein Complex; Pyridazines; Pyridones

1997