Journal of Plant Pathology, ( ISI ), Volume (93), No (3), Year (2011-1) , Pages (701-706)

Title : ( Differential expression of TIR-like genes embeded in the Mi-1 Gene cluster in nematode-resistant and -susceptible tomato roots )

Authors: Alireza Seifi , Visser RGF , Bai Y ,

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Transport inhibitor 1 (TIR1) is an auxin receptor that plays a pivotal role in auxin signaling. It has been reported that TIR-like genes are present in a gene cluster carrying the Mi-1 gene which confers resistance to nematodes, aphids and whiteflies. Since auxin is involved in the pathogenicity of tumor-inducing pathogens like nematodes, the co-localization of TIR-like genes with the Mi-1 gene may imply a role for TIR-like genes in the resistance conferred by the Mi-1 gene. In this study, we monitored the TIR-like transcript abundance (TTA) in both roots and leaves of nematode-resistant and –susceptible tomato lines. Our results demonstrate that TTA in roots, but not in leaves, was lower in nematode-resistant tomatoes than that in nematode-susceptible ones. In order to test whether the TIR-like genes are involved in nematode resistance mediated by the Mi-1 gene, we transiently silenced the Mi-1 gene homologues in a nematode-resistant tomato line and then measured TTA. Results showed that knocking down the expression of the Mi-1 gene homologues had no effect on TTA, therefore, we concluded that involvement of TIR-like genes in the response of tomato roots to nematodes is probably independent of the Mi-1 gene homologues. Further, we propose a possible explanation for the association between TTA and resistance to root-knot nematodes in tomato.

Keywords

, Auxin signaling, TIR-like genes, nematode resistance, tomato, Mi-1
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@article{paperid:1044791,
author = {Seifi, Alireza and Visser RGF and Bai Y},
title = {Differential expression of TIR-like genes embeded in the Mi-1 Gene cluster in nematode-resistant and -susceptible tomato roots},
journal = {Journal of Plant Pathology},
year = {2011},
volume = {93},
number = {3},
month = {January},
issn = {1125-4653},
pages = {701--706},
numpages = {5},
keywords = {Auxin signaling; TIR-like genes; nematode resistance; tomato; Mi-1 gene},
}

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%0 Journal Article
%T Differential expression of TIR-like genes embeded in the Mi-1 Gene cluster in nematode-resistant and -susceptible tomato roots
%A Seifi, Alireza
%A Visser RGF
%A Bai Y
%J Journal of Plant Pathology
%@ 1125-4653
%D 2011

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