Journal Article

Sequence analysis of Expressed Sequence Tags from an ABA-Treated cDNA Library Identifies Stress Response Genes in the Moss <i>Physcomitrella patens</i>

Jesse Machuka, Stavros Bashiardes, Eliza Ruben, Kate Spooner, Andrew Cuming, Celia Knight and David Cove

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 40, issue 4, pages 378-387
Published in print January 1999 | ISSN: 0032-0781
Published online January 1999 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029553
Sequence analysis of Expressed Sequence Tags from an ABA-Treated cDNA Library Identifies Stress Response Genes in the Moss Physcomitrella patens

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Partial cDNA sequencing was used to obtain 169 expressed sequence tags (ESTs) in the moss, Physcomitrella patens. The source of ESTs was a random cDNA library constructed from 7 day-old protonemata following treatment with 10−4 M abscisic acid (ABA). Analysis of the ESTs identified 69% with homology to known sequences, 61% of which had significant homology to sequences of plant origin. More importantly, at least 11 ESTs had significant similarities to genes which are implicated in plant stress-responses, including responses which may involve ABA. These included a cDNA associated with desiccation tolerance, two heat shock protein genes, one cold acclimation protein cDNA and five others that may be involved in either oxidative or chemical stress or both, i.e., Zn/Cu-superoxide dismutase, NADPH protochlorophyllide oxidoreductase (PorB), selenium binding protein, glutathione peroxidase and glutathione S transferase. Analysis of codon usage between P. patens and seed plants indicated that although mosses and higher plants are to a large extent similar, minor variations also exist that may represent the distinctiveness of each group.

Keywords: ABA; Codon usage; ESTs; Moss; Physcomitrella patens; Stress

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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