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Cited by 288

The DOI matches its Crossref record; 53 of the 53 references it cites were found in a registry or an index.

The Timing of Senescence and Response to Pathogens Is Altered in the Ascorbate-Deficient Arabidopsis Mutant vitamin c-1

Open access
Barth, Carina, Moeder, Wolfgang, Klessig, Daniel F., Conklin, Patricia L.·2004·Plant Physiology
DOI 10.1104/pp.103.032185
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Abstract

The ozone-sensitive Arabidopsis mutant vitamin c-1 (vtc1) is deficient in l-ascorbic acid (AsA) due to a mutation in GDP-Man pyrophosphorylase (Conklin et al., 1999), an enzyme involved in the AsA biosynthetic pathway (Smirnoff et al., 2001). In this study, the physiology of this AsA deficiency was initially investigated in response to biotic (virulent pathogens) stress and subsequently with regards to the onset of senescence. Infection with either virulent Pseudomonas syringae or Peronospora parasitica resulted in largely reduced bacterial and hyphal growth in the vtc1 mutant in comparison to the wild type. When vitamin c-2 (vtc2), another AsA-deficient mutant, was challenged with P. parasitica, growth of the fungus was also reduced, indicating that the two AsA-deficient mutants are more resistant to these pathogens. Induction of pathogenesis-related proteins PR-1 and PR-5 is significantly higher in vtc1 than in the wild type when challenged with virulent P. syringae. In addition, the vtc1 mutant exhibits elevated levels of some senescence-associated gene (SAG) transcripts as well as heightened salicylic acid levels. Presumably, therefore, low AsA is causing vtc1 to enter at least some stage(s) of senescence prematurely with an accompanying increase in salicylic acid levels that results in a faster induction of defense responses.

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Metadata

Authors
Barth, C., Moeder, W., Klessig, D. F., & Conklin, P. L.
Venue
Plant Physiology
Publisher
Oxford University Press (OUP)
Published
2004-04-01
Volume
134
Issue
4
Pages
1784-1792
ISSN
  • 0032-0889 (ISSN-L)
  • 1532-2548
DOI
10.1104/pp.103.032185
OpenAlex
W2057146784
Cited by
288
References
53
FWCI
17.62
Type
journal article
Language
en
Open access
green

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