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PMID: 19517001 Published · ppublish English Journal Article

The Arabidopsis thaliana Transcription Factor AtMYB102 Functions in Defense Against the Insect Herbivore Pieris rapae.

Plant signaling & behavior ·Vol. 1 ·No. 6 ·2006-11-00 ·Pages 305-11

De Vos M, Denekamp M, Dicke M, Vuylsteke M, Van Loon L, Smeekens SC, Pieterse CM

Abstract

In Arabidopsis thaliana the R2R3-MYB transcription factor family consists of over 100 members and is implicated in many biological processes, such as plant development, metabolism, senescence, and defense. The R2R3-MYB transcription factor gene AtMYB102 has been shown to respond to salt stress, ABA, JA, and wounding, suggesting that AtMYB102 plays a role in the response of plants to dehydration after wounding. Here, we studied the role of AtMYB102 in the response of A. thaliana to feeding by larvae of the white cabbage butterfly Pieris rapae. A. thaliana reporter lines expressing GUS under control of the AtMYB102 promoter revealed that AtMYB102 is expressed locally at the feeding sites of herbivore-damaged leaves, but not systemically in uninfested plant parts. Knockout AtMYB102 transposon-insertion mutant plants (myb102) allowed a faster development of P. rapae caterpillars than wild-type Col-0 plants. Moreover, the number of caterpillars that had developed into pupae within 14 days was significantly higher on myb102, indicating that in wild-type plants AtMYB102 contributes to basal resistance against P. rapae feeding. Microarray analysis of wild-type Col-0 and AtMYB102 overexpressing 35S::MYB102 plants revealed a large number of differentially expressed genes. Besides several defense-related genes, a relatively large number of genes is associated with cell wall modifications.

Keywords
Arabidopsis AtMYB102 MYB transcription factor Pieris rapae insect resistance jasmonic acid
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
De Vos Martin
Graduate School Experimental Plant Sciences; Section Phytopathology; Institute of Environmental Biology; Faculty of Science; Utrecht University; Utrecht, The Netherlands.
Denekamp Marten
Dicke Marcel
Vuylsteke Marnik
Van Loon Lc
Smeekens Sjef Cm
Pieterse Corné Mj
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Article Info
Journal
Plant signaling & behavior
Abbr.
Plant Signal Behav
ISSN
1559-2316
DOI
10.4161/psb.1.6.3512
Published
2006-11-00
Pages
305-11
Language
English
Region
United States
NLM ID
101291431
PMCID
PMC2634245
External Links
PubMed source DOI: 10.4161/psb.1.6.3512 PMC Full Text View journal details
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