Publication Date:
2016-01-09
Description:
Solar radiation absorbed by marine phytoplankton can follow three possible paths. By simultaneously measuring the quantum yields of photochemistry and chlorophyll fluorescence in situ, we calculate that, on average, ~60% of absorbed photons are converted to heat, only 35% are directed toward photochemical water splitting, and the rest are reemitted as fluorescence. The spatial pattern of fluorescence yields and lifetimes strongly suggests that photochemical energy conversion is physiologically limited by nutrients. Comparison of in situ fluorescence lifetimes with satellite retrievals of solar-induced fluorescence yields suggests that the mean values of the latter are generally representative of the photophysiological state of phytoplankton; however, the signal-to-noise ratio is unacceptably low in extremely oligotrophic regions, which constitute 30% of the open ocean.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Hanzhi -- Kuzminov, Fedor I -- Park, Jisoo -- Lee, SangHoon -- Falkowski, Paul G -- Gorbunov, Maxim Y -- New York, N.Y. -- Science. 2016 Jan 15;351(6270):264-7. doi: 10.1126/science.aab2213. Epub 2016 Jan 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Environmental Biophysics and Molecular Ecology Program, Department of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, 71 Dudley Road, New Brunswick, NJ, USA. ; Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-Gu, Incheon, Republic of Korea. ; Environmental Biophysics and Molecular Ecology Program, Department of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, 71 Dudley Road, New Brunswick, NJ, USA. Department of Earth and Planetary Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26743625" target="_blank"〉PubMed〈/a〉
Keywords:
Chlorophyll/chemistry/*metabolism
;
Energy Metabolism
;
*Fluorescence
;
Oceans and Seas
;
*Photons
;
*Photosynthesis
;
Phytoplankton/chemistry/*metabolism
;
Signal-To-Noise Ratio
;
*Solar Energy
;
Water/chemistry
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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