The Sw-5 Gene Cluster: Tomato Breeding and Research Toward Orthotospovirus Disease Control

The gene cluster encodes protein receptors that are potentially able to recognize microbial products and activate signaling pathways that lead to plant cell immunity. Although there are several homologs in the tomato genome, only one of them, named , has been extensively studied due to its functiona...

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Published inFrontiers in plant science Vol. 9; p. 1055
Main Authors de Oliveira, Athos S, Boiteux, Leonardo S, Kormelink, Richard, Resende, Renato O
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 19.07.2018
Subjects
NB-LRR
NLR
Orthotospovirus
Plant Science
Resistance
Sw-5
Sw-5b
Tomato
NB-LRR
NLR
orthotospovirus
Sw-5
tomato
Sw-5b
resistance
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Summary:The gene cluster encodes protein receptors that are potentially able to recognize microbial products and activate signaling pathways that lead to plant cell immunity. Although there are several homologs in the tomato genome, only one of them, named , has been extensively studied due to its functionality against a wide range of (thrips-transmitted) orthotospoviruses. The gene is a dominant resistance gene originally from a wild Peruvian tomato that has been used in tomato breeding programs aiming to develop cultivars with resistance to these viruses. Here, we provide an overview starting from the first reports of Sw-5 resistance, positional cloning and the sequencing of the gene cluster from resistant tomatoes and the validation of Sw-5b as the functional protein that triggers resistance against orthotospoviruses. Moreover, molecular details of this plant-virus interaction are also described, especially concerning the roles of Sw-5b domains in the sensing of orthotospoviruses and in the signaling cascade leading to resistance and hypersensitive response.
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Reviewed by: Gian Paolo Accotto, Istituto per la Protezione Sostenibile delle Piante (IPSP), Italy; Denis Michael Persley, Queensland Government, Australia
This article was submitted to Virology, a section of the journal Frontiers in Plant Science
Edited by: Ralf Georg Dietzgen, The University of Queensland, Australia
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2018.01055