Identification of salt and drought inducible glutathione S-transferase genes of hybrid poplar

Soon Ho Kwon, Hye Kyoung Kwon, Wook Kim, Eun Woon Noh, Mi Kwon, Young Im Choi

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Abstract

Recent genome annotation revealed that Populus trichocarpa contains 81 glutathione S-transferase (GST) genes. GST genes play important and varying roles in plants, including conferring tolerance to various abiotic stresses. Little information is available on the relationship - if any - between drought/salt stresses and GSTs in woody plants. In this study, we screened the PatgGST genes in hybrid poplar (Populus alba × Populus tremula var. glandulosa) that were predicted to confer drought tolerance based on our expression analysis of all members of the poplar GST superfamily following exposure to salt (NaCl) and drought (PEG) stresses, respectively. Exposure to the salt stress resulted in the induction of eight PatgGST genes and down-regulation of one PatgGST gene, and the level of induction/repression was different in leaf and stem tissues. In contrast, 16 PatgGST genes were induced following exposure to the drought (PEG) stress, and two were down-regulated. Taken together, we identified seven PatgGSTs (PatgGSTU15, PatgGSTU18, PatgGSTU22, PatgGSTU27, PatgGSTU46, PatgGSTU51 and PatgGSTU52) as putative drought tolerance genes based on their induction by both salt and drought stresses.

Original languageEnglish
Pages (from-to)26-32
Number of pages7
JournalJournal of Plant Biotechnology
Volume41
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

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Keywords

  • Drought stress
  • Glutathione S-transferases
  • Populus alba × Populus tremula var. glandulosa
  • Salt stress

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Plant Science

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