Planta

, Volume 234, Issue 4, pp 671–684

Quantitative genetic analysis of salicylic acid perception in Arabidopsis

  • Albor Dobón
  • Juan Vicente Canet
  • Lorena Perales
  • Pablo Tornero
Original Article

Abstract

Salicylic acid (SA) is a phytohormone required for a full resistance against some pathogens in Arabidopsis, and NPR1 (Non-Expressor of Pathogenesis Related Genes 1) is the only gene with a strong effect on resistance induced by SA which has been described. There can be additional components of SA perception that escape the traditional approach of mutagenesis. An alternative to that approach is searching in the natural variation of Arabidopsis. Different methods of analyzing the variation between ecotypes have been tried and it has been found that measuring the growth of a virulent isolate of Pseudomonas syringae after the exogenous application of SA is the most effective one. Two ecotypes, Edi-0 and Stw-0, have been crossed, and their F2 has been studied. There are two significant quantitative trait loci (QTLs) in this population, and there is one QTL in each one of the existing mapping populations Col-4 × Laer-0 and Laer-0 × No-0. They have different characteristics: while one QTL is only detectable at low concentrations of SA, the other acts after the point of crosstalk with methyl jasmonate signalling. Three of the QTLs have candidates described in SA perception as NPR1, its interactors, and a calmodulin binding protein.

Keywords

Arabidopsis Defence Natural variation Salicylic acid 

Abbreviations

BTH

Benzothiadiazole

MeJA

Methyl jasmonate

NIL

Near isogenic lines

NPR1

Non-Expressor of Pathogenesis Related Genes 1

QTL

Quantitative trait loci

RIL

Recombinant inbreed lines

SA

Salicylic acid

Supplementary material

425_2011_1436_MOESM1_ESM.pdf (322 kb)
Supplemental Figures (PDF 322 kb)

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Albor Dobón
    • 1
  • Juan Vicente Canet
    • 1
  • Lorena Perales
    • 1
    • 2
  • Pablo Tornero
    • 1
    • 3
  1. 1.Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia (UPV)-Consejo Superior de Investigaciones Científicas (CSIC); Ciudad Politécnica de la Innovación (CPI)ValenciaSpain
  2. 2.Instituto de Agroquímica y Tecnología de Alimentos (CSIC)Paterna (Valencia)Spain
  3. 3.IBMCP (UPV-CSIC)ValenciaSpain

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