Identification of hypo-osmotically induced genes in Kappaphycus alvarezii (Solieriaceae, Rhodophyta) through expressed sequence tag analysis

  • Liu C
  • Wang X
  • Huang X
 et al. 
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Abstract

AbstractHypo-osmotic conditions are among the most stressful environmental factors that affect seaweed physiology and productivity. To improve understanding of hypo-osmotic adaptation and to find genes involved in low salinity stress, we conducted an analysis of expressed sequence tags (ESTs) on the κ-carrageenan-producing red algae, Kappaphycus alvarezii. Of 454 tentatively unique genes (TUGs), 281 matched protein sequences by BlastX analysis (e value≤10-3), 112 TUGs matched ESTs from other agar- or carrageenan-producing red algae, and 98 TUGs were annotated. The transcriptional profiles of six functional genes from K. alvarezii ESTs were examined. An ATP-binding cassette transporter gene and a sodium phosphate symporter gene were significantly up-regulated, indicating the importance of membrane transport proteins in coping with hypo-osmotic stress conditions.

Author-supplied keywords

  • ATP-binding cassette transporter
  • Kappaphycus alvarezii
  • expressed sequence tag
  • hypo-osmotic stress
  • sodium phosphate symporter

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Authors

  • Chenlin Liu

  • Xiuliang Wang

  • Xiaohang Huang

  • Jianguo Liu

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