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DIATOM GROWTH RESPONSES TO PHOTOPERIOD AND LIGHT ARE PREDICTABLE FROM DIEL REDUCTANT GENERATION
Li, G; Talmy, D; Campbell, DA; dcampbell@mta.ca
2017
Source PublicationJOURNAL OF PHYCOLOGY
Volume53Issue:1Pages:95-107
AbstractLight drives phytoplankton productivity, so phytoplankton must exploit variable intensities and durations of light exposure, depending upon season, latitude, and depth. We analyzed the growth, photophysiology and composition of small, Thalassiosira pseudonana, and large, Thalassiosira punctigera, centric diatoms from temperate, coastal marine habitats, responding to a matrix of photoperiods and growth light intensities. T. pseudonana showed fastest growth rates under long photoperiods and low to moderate light intensities, while the larger T. punctigera showed fastest growth rates under short photoperiods and higher light intensities. Photosystem II function and content responded primarily to instantaneous growth light intensities during the photoperiod, while diel carbon fixation and RUBISCO content responded more to photoperiod duration than to instantaneous light intensity. Changing photoperiods caused species-specific changes in the responses of photochemical yield(e(-)/photon) to growth light intensity. These photophysiological variables showed complex responses to photoperiod and to growth light intensity. Growth rate also showed complex responses to photoperiod and growth light intensity. But these complex responses resolved into a close relation between growth rate and the cumulative daily generation of reductant, across the matrix of photoperiods and light intensities.
Department[Li, Gang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou, Guangdong, Peoples R China; [Talmy, David] MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; [Campbell, Douglas A.] Mt Allison Univ, Dept Biol, 63B York St, Sackville, NB, Canada
KeywordCell Size Diatom Electron Transport Growth Photoperiod Photosystem Ii Rubisco Thalassiosira
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16236
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authordcampbell@mta.ca
Recommended Citation
GB/T 7714
Li, G,Talmy, D,Campbell, DA,et al. DIATOM GROWTH RESPONSES TO PHOTOPERIOD AND LIGHT ARE PREDICTABLE FROM DIEL REDUCTANT GENERATION[J]. JOURNAL OF PHYCOLOGY,2017,53(1):95-107.
APA Li, G,Talmy, D,Campbell, DA,&dcampbell@mta.ca.(2017).DIATOM GROWTH RESPONSES TO PHOTOPERIOD AND LIGHT ARE PREDICTABLE FROM DIEL REDUCTANT GENERATION.JOURNAL OF PHYCOLOGY,53(1),95-107.
MLA Li, G,et al."DIATOM GROWTH RESPONSES TO PHOTOPERIOD AND LIGHT ARE PREDICTABLE FROM DIEL REDUCTANT GENERATION".JOURNAL OF PHYCOLOGY 53.1(2017):95-107.
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