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Fitness benefits of systemic acquired resistance during Hyaloperonospora parasitica infection in Arabidopsis thaliana.

Publication ,  Journal Article
Heidel, AJ; Dong, X
Published in: Genetics
July 2006

We investigated the fitness benefits of systemic acquired resistance (SAR) in Arabidopsis thaliana using a mutational and transformational genetic approach. Genetic lines were designed to differ in the genes determining resistance signaling in a common genetic background. Two mutant lines (cpr1 and cpr5) constitutively activate SAR at different points in SAR signaling, and one mutant line (npr1) has impaired SAR. The transgenic line (NPR1-H) has enhanced resistance when SAR is activated, but SAR is still inducible similarly to wild type. The fitness benefits were also investigated under two nutrient levels to test theories that preventing pathogen damage and realized resistance benefits may be affected by nutrient availability. Under low-nutrient conditions and treatment with the pathogenic oomycete, Hyaloperonospora parasitica, wild type had a higher fitness than the mutant that could not activate SAR, demonstrating that normal inducible SAR is beneficial in these conditions; this result, however, was not found under high-nutrient conditions. The mutants with constitutive SAR all failed to show a fitness benefit in comparison to wild type under a H. parasitica pathogen treatment, suggesting that SAR is induced to prevent an excessive fitness cost.

Duke Scholars

Published In

Genetics

DOI

EISSN

1943-2631

ISSN

0016-6731

Publication Date

July 2006

Volume

173

Issue

3

Start / End Page

1621 / 1628

Related Subject Headings

  • Seeds
  • Plants, Genetically Modified
  • Plant Leaves
  • Plant Diseases
  • Oomycetes
  • Nuclear Proteins
  • Mutation
  • Immunity, Innate
  • Gene Expression Regulation, Plant
  • Developmental Biology
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Heidel, A. J., & Dong, X. (2006). Fitness benefits of systemic acquired resistance during Hyaloperonospora parasitica infection in Arabidopsis thaliana. Genetics, 173(3), 1621–1628. https://doi.org/10.1534/genetics.106.059022
Heidel, Andrew J., and Xinnian Dong. “Fitness benefits of systemic acquired resistance during Hyaloperonospora parasitica infection in Arabidopsis thaliana.Genetics 173, no. 3 (July 2006): 1621–28. https://doi.org/10.1534/genetics.106.059022.
Heidel, Andrew J., and Xinnian Dong. “Fitness benefits of systemic acquired resistance during Hyaloperonospora parasitica infection in Arabidopsis thaliana.Genetics, vol. 173, no. 3, July 2006, pp. 1621–28. Epmc, doi:10.1534/genetics.106.059022.

Published In

Genetics

DOI

EISSN

1943-2631

ISSN

0016-6731

Publication Date

July 2006

Volume

173

Issue

3

Start / End Page

1621 / 1628

Related Subject Headings

  • Seeds
  • Plants, Genetically Modified
  • Plant Leaves
  • Plant Diseases
  • Oomycetes
  • Nuclear Proteins
  • Mutation
  • Immunity, Innate
  • Gene Expression Regulation, Plant
  • Developmental Biology