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Plant Physiol. 2002 Oct;130(2):904-17.

Mass spectrometric identification of isoforms of PR proteins in xylem sap of fungus-infected tomato.

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  • 1Plant Pathology, Swammerdam Institute for Life Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands. rep@science.uva.nl

Abstract

The protein content of tomato (Lycopersicon esculentum) xylem sap was found to change dramatically upon infection with the vascular wilt fungus Fusarium oxysporum. Peptide mass fingerprinting and mass spectrometric sequencing were used to identify the most abundant proteins appearing during compatible or incompatible interactions. A new member of the PR-5 family was identified that accumulated early in both types of interaction. Other pathogenesis-related proteins appeared in compatible interactions only, concomitantly with disease development. This study demonstrates the feasibility of using proteomics for the identification of known and novel proteins in xylem sap, and provides insights into plant-pathogen interactions in vascular wilt diseases.

PMID:
12376655
PMCID:
PMC166617
DOI:
10.1104/pp.007427
[PubMed - indexed for MEDLINE]
Free PMC Article
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