Transcriptomic analysis of Gracilaria changii (Rhodophyta) in response to hyper- and hypo-osmotic stresses

Teo, Swee Sen and Ho, Chai Ling and Teoh, Seddon and Abdul Rahim, Raha and Phang, Siew Moi (2009) Transcriptomic analysis of Gracilaria changii (Rhodophyta) in response to hyper- and hypo-osmotic stresses. Journal of Phycology, 45 (5). pp. 1093-1099. ISSN 0022-3646

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Abstract

Osmotic stress is one of the most significant natural abiotic stresses that occur in the intertidal zones. Seaweeds may physiologically acclimate to changing osmolarity by altering their transcriptome. Here, we investigated the transcriptomic changes of Gracilaria changii (B. M. Xia et I. A. Abbott) I. A. Abbott, J. Zhang et B. M. Xia in response to hyper- and hypoosmotic stresses using a cDNA microarray approach. Microarray analysis revealed that 199 and 200 genes from 3,300 genes examined were up-and down-regulated by >2-fold in seaweed samples treated at 50 parts per thousand (ppt) artificial sea-water (ASW) compared with those at 30 ppt ASW,respectively. The number of genes that were up-and down-regulated by >2-fold in seaweed samples treated at 10 ppt ASW compared with those at 30 ppt ASW were 154 and 187, respectively. A majority of these genes were only differentially expressed under hyper- or hypoosmotic conditions, whereas 67 transcripts were affected by both stresses. The findings of this study have shed light on the expression profiles of many transcripts during the acclimation of G. changii to hyperosmotic and hypoosmotic conditions. This information may assist in the prioritization of genes to be examined in future studies.

Item Type:Article
Keyword:cDNA microarray; Gracilaria changii; osmotic stresses; real-time PCR; seaweed
Subject:DNA microarrays
Subject:Gracilaria
Subject:Marine algae - Biotechnology
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Publisher:Phycological Society of America
DOI Number:10.1111/j.1529-8817.2009.00724.x
ID Code:17470
Deposited By: Nida Hidayati Ghazali
Deposited On:23 Apr 2012 08:28
Last Modified:17 Dec 2012 03:18

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