Dynamic response of the transcriptome of a psychrophilic diatom, Chaetoceros neogracile, to high irradiance.

Planta
Seunghye ParkEonSeon Jin

Abstract

Large-scale RNA profiling revealed that high irradiance differentially regulated 577 out of 1,439 non-redundant genes of the Antarctic marine diatom Chaetoceros neogracile, represented on a custom cDNA chip, during 6 h of treatment. Among genes that were up- or down-regulated more than twofold within 30 min of treatment (310/1,439), about half displayed an acclimatory response during 6 h under high light. Expression of the remaining non-acclimatory genes also rapidly returned to initial levels within 30 min following a shift to low irradiance. High light altered expression of most of the photosynthesis genes (48/70), in contrast to genes in other functional categories. In addition, opposite response patterns were provoked in genes encoding fucoxanthin chlorophyll a/c binding protein (FCP), the main component of the diatom light-harvesting complex; high irradiance caused a decrease in expression of most FCP genes, but drove the rapid and specific up-regulation of ten others. C. neogracile responded very promptly to a change in light intensity by rapidly adjusting the transcript levels of FCP genes up-regulated by high light, and these dynamic adjustments coincided well with diatoxanthin (Dtx) levels formed by the xanthophyll cyc...Continue Reading

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Citations

Oct 6, 2010·Proceedings of the National Academy of Sciences of the United States of America·Benjamin BailleulGiovanni Finazzi
Feb 14, 2012·Journal of Experimental Botany·Frauke Angelique DepauwAngela Falciatore
May 28, 2011·Plant Physiology·Hongyan WuDouglas A Campbell
Jul 3, 2010·Photosynthesis Research·Jonathan A D Neilson, Dion G Durnford
Aug 25, 2010·Photosynthesis Research·Martine Bertrand
Feb 18, 2011·Photosynthesis Research·Bernard LepetitChristian Wilhelm
May 24, 2014·Journal of Plant Physiology·Reimund Goss, Bernard Lepetit
Jul 29, 2018·The Journal of Eukaryotic Microbiology·Pattarasiri Rangsrikitphoti, Dion G Durnford
Aug 30, 2018·Biochemical Society Transactions·Vasco Giovagnetti, Alexander V Ruban

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