Transcriptome analysis of acclimatory responses to thermal stress in Antarctic algae

Biochemical and Biophysical Research Communications
Yong-Sic HwangEonSeon Jin

Abstract

A customized cDNA chip analysis provided the relative expression profiling of 1439 ESTs of Chaetoceros neogracile in culture environments maintained between 4 and 10 degrees C. Among the 1439 probes, 21.5% were differentially regulated (2-fold) by the temperature upshift within three days. Up-regulation was more prominent among cytoprotective genes, whereas down-regulation was featured in photosynthetic genes. A third of the differentially expressed genes had an unknown function or no similarity to known genes, highlighting their potential importance as a resource to identify key players in the acclimation response of polar algae under thermal stress. Our transcriptome analysis also revealed novel aspects of temperature-responsive, coordinated changes in the abundance of specific mRNAs, along with the rapid establishment of molecular homeostasis in polar algae. Unexpectedly, a small set of genes encoding fucoxanthin chlorophyll a/c-binding proteins were rapidly up-regulated by thermal stress, implying that they have different roles other than light harvesting.

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Citations

Apr 8, 2010·Extremophiles : Life Under Extreme Conditions·Shenghao LiuXiaohang Huang
Aug 25, 2010·Photosynthesis Research·Martine Bertrand
Jan 14, 2011·BMC Molecular Biology·Simon M DittamiThierry Tonon
Dec 22, 2009·Marine Biotechnology·In Gyu GwakEonSeon Jin
May 24, 2014·Journal of Plant Physiology·Reimund Goss, Bernard Lepetit
May 11, 2016·Extremophiles : Life Under Extreme Conditions·Chenlin LiuChengjun Sun
Aug 24, 2017·Environmental Microbiology·Isabelle Raymond-BouchardLyle G Whyte
Aug 13, 2014·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Yunho GwakEonSeon Jin
Aug 16, 2018·Frontiers in Microbiology·Isabelle Raymond-BouchardLyle G Whyte
Jan 15, 2020·BMC Genomics·Luca RugiuVeijo Jormalainen
Aug 5, 2017·Frontiers in Microbiology·Matthew J HarkeSonya T Dyhrman

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