Journal
NITRIC OXIDE-BIOLOGY AND CHEMISTRY
Volume 24, Issue 2, Pages 84-90Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.niox.2010.12.003
Keywords
NO donor sodium nitroprusside; Thylakoid membrane; Electron transport rate; Flash oxygen evolution; PAM
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Funding
- National Science Fund and International collaborative research [01/07, INT/BULGARIA/B70/06]
- Department of Science & Technology, Govt. of India, New Delhi
- UGC-MRP [36-302/2008]
- European Union
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The nitric oxide (NO) donor sodium nitroprusside (SNP) is frequently used in plant science in vivo. The present in vitro study reveals its effects on the photosynthetic oxygen evolution and the chlorophyll fluorescence directly on isolated pea thylakoid membranes. It was found that even at very low amounts of SNP (chlorophyll/SNP molar ratio similar to 67:1), the SNP-donated NO stimulates with more than 50% the overall photosystem II electron transport rate and diminishes the evolution of molecular oxygen. It was also found that the target site for SNP-donated NO is the donor side of photosystem II. Compared with other NO-donors used in plant science, SNP seems to be the only one exhibiting stimulation of electron transport through photosystem II. (C) 2010 Elsevier Inc. All rights reserved.
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