MelampsoraV2, Main, Exploration, bibRecord, 000C16

Of PAMPs and Effectors: The Blurred PTI-ETI Dichotomy[OA]

Identifieur interne : 000C16 ( Main/Exploration ); précédent : 000C15; suivant : 000C17

Of PAMPs and Effectors: The Blurred PTI-ETI Dichotomy[OA]

Auteurs : Bart P. H. J. Thomma [Pays-Bas] ; Thorsten Nürnberger [Allemagne] ; Matthieu H. A. J. Joosten [Pays-Bas]

Source :

The Plant Cell [ 1040-4651 ] ; 2011.

RBID : PMC:3051239

Abstract

Typically, pathogen-associated molecular patterns (PAMPs) are considered to be conserved throughout classes of microbes and to contribute to general microbial fitness, whereas effectors are species, race, or strain specific and contribute to pathogen virulence. Both types of molecule can trigger plant immunity, designated PAMP-triggered and effector-triggered immunity (PTI and ETI, respectively). However, not all microbial defense activators conform to the common distinction between PAMPs and effectors. For example, some effectors display wide distribution, while some PAMPs are rather narrowly conserved or contribute to pathogen virulence. As effectors may elicit defense responses and PAMPs may be required for virulence, single components cannot exclusively be referred to by one of the two terms. Therefore, we put forward that the distinction between PAMPs and effectors, between PAMP receptors and resistance proteins, and, therefore, also between PTI and ETI, cannot strictly be maintained. Rather, as illustrated by examples provided here, there is a continuum between PTI and ETI. We argue that plant resistance is determined by immune receptors that recognize appropriate ligands to activate defense, the amplitude of which is likely determined by the level required for effective immunity.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3051239

DOI: 10.1105/tpc.110.082602
PubMed: 21278123
PubMed Central: 3051239

Affiliations:

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<front><div type="abstract" xml:lang="en"><p>Typically, pathogen-associated molecular patterns (PAMPs) are considered to be conserved throughout classes of microbes and to contribute to general microbial fitness, whereas effectors are species, race, or strain specific and contribute to pathogen virulence. Both types of molecule can trigger plant immunity, designated PAMP-triggered and effector-triggered immunity (PTI and ETI, respectively). However, not all microbial defense activators conform to the common distinction between PAMPs and effectors. For example, some effectors display wide distribution, while some PAMPs are rather narrowly conserved or contribute to pathogen virulence. As effectors may elicit defense responses and PAMPs may be required for virulence, single components cannot exclusively be referred to by one of the two terms. Therefore, we put forward that the distinction between PAMPs and effectors, between PAMP receptors and resistance proteins, and, therefore, also between PTI and ETI, cannot strictly be maintained. Rather, as illustrated by examples provided here, there is a continuum between PTI and ETI. We argue that plant resistance is determined by immune receptors that recognize appropriate ligands to activate defense, the amplitude of which is likely determined by the level required for effective immunity.</p>
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Of PAMPs and Effectors: The Blurred PTI-ETI Dichotomy[OA]

Of PAMPs and Effectors: The Blurred PTI-ETI Dichotomy[OA]

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Abstract

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