Wounding induces tomato Ve1 R-gene expression

Nazar, Ross N.; Castroverde, Christian Danve M.; Xu, Xin; Kurosky, Alexander; Robb, Jane

doi:10.1007/s00425-019-03121-6

Cited by 10 publications

(11 citation statements)

References 37 publications

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“…Most cloned disease resistance genes are expressed constitutively 60,61 . Constitutive expression was observed in genes conferring resistance to various pathogens, including bacteria [62][63][64] and fungi [65][66][67][68] . However, expression of some resistance genes is induced by an external factor, and this group can be divided into two subgroups.…”

Section: Discussionmentioning

confidence: 99%

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The barley leaf rust resistance gene Rph3 encodes a putative executor protein

Dinh

Singh

Cruz

et al. 2021

Preprint

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Host resistance is considered the most effective means to control plant diseases; however, individually deployed resistance genes are often rapidly overcome by pathogen adaptation. Combining multiple effective resistance genes is the optimal approach to durable resistance, but the lack of functional markers for resistance genes has hampered implementation. Leaf rust, caused by Puccinia hordei, is an economically significant disease of barley, but only a few major Resistance genes to P. hordei (Rph) have been cloned. In this study, gene Rph3 was isolated by positional cloning and confirmed by mutational analysis and transgenic complementation. The Rph3 gene, which originated from wild barley and was first introgressed into cultivated Egyptian germplasm, encodes a unique transmembrane resistance protein that differs from all known plant disease resistance proteins at the amino acid sequence level. Genetic profiles of diverse accessions indicated limited genetic diversity in Rph3 in domesticated germplasm, and higher diversity in wild barley from the Eastern Mediterranean region. Expression profiling using P. hordei isolates with contrasting pathogenicity for the Rph3 host locus showed that the Rph3 gene was expressed only in interactions with Rph3-avirulent isolates, a phenomenon also observed for transcription activator-like effector-dependent genes known as executors conferring resistance to Xanthomonas spp. Like the known transmembrane executors such as Bs3 and Xa7 heterologous expression of Rph3 in N. benthamiana induced a cell death response. Given that Rph3 shares several features with executor genes, it seems likely that P. hordei contains effectors similar to the transcription activator-like effectors that target host executor genes. The isolation of Rph3 highlights convergent evolutionary processes in diverse plant-pathogen interaction systems, where similar defence mechanisms evolved independently in monocots and dicots and provide evidence for executor genes in the Triticeae tribe.

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Section: Discussionmentioning

confidence: 99%

“…Two examples of this are Xa1, which confers resistance to Xanthomonas oryzae in rice and Ve1, which confers resistance to Verticillium dahlia strain Vd1 in tomato. These two genes are induced upon pathogen infection irrespective of pathogenicity, as well as by physical damage 65,69 .…”

Section: Discussionmentioning

confidence: 99%

The barley leaf rust resistance gene Rph3 encodes a putative executor protein

Dinh

Singh

Cruz

et al. 2021

Preprint

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“…Defense-related gene expression responses are activated by various abiotic and biotic stresses in plants. In tomatoes, physical wounding induces defense-related genes, including the Ve1 gene, in both susceptible and resistance lines [115]. During the compatible interaction between tomatoes and V. dahliae, compared to non-inoculated control plants, 1953 significantly differentially expressed genes (DEGs) were identified in the root samples two days after inoculation.…”

Section: Genome-wide Analysis Of Host-pathogen Interactions With Vertmentioning

confidence: 99%

Opportunities and Challenges in Studies of Host-Pathogen Interactions and Management of Verticillium dahliae in Tomatoes

Acharya

Ingram

et al. 2020

Plants

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Tomatoes (Solanum lycopersicum L.) are a valuable horticultural crop that are grown and consumed worldwide. Optimal production is hindered by several factors, among which Verticillium dahliae, the cause of Verticillium wilt, is considered a major biological constraint in temperate production regions. V. dahliae is difficult to mitigate because it is a vascular pathogen, has a broad host range and worldwide distribution, and can persist in soil for years. Understanding pathogen virulence and genetic diversity, host resistance, and plant-pathogen interactions could ultimately inform the development of integrated strategies to manage the disease. In recent years, considerable research has focused on providing new insights into these processes, as well as the development and integration of environment-friendly management approaches. Here, we discuss the current knowledge on the race and population structure of V. dahliae, including pathogenicity factors, host genes, proteins, enzymes involved in defense, and the emergent management strategies and future research directions for managing Verticillium wilt in tomatoes.

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“…At the transcriptional level, tomato immune receptors have been found to be induced by ergosterol and squalene from the fungal symbiont Trichoderma [34]. In solanaceous plants, examples of RLP/RLK and NLR genes can be induced by wounding [35,36], hormone treatments [10,35,37], pathogen infection [10,[37][38][39][40] and effector gene expression [37,41]. In Arabidopsis, both RLP and NLR genes can be induced by a range of environmental stresses and different hormones [42,43].…”

Section: Expression and Regulationmentioning

confidence: 99%

Diversity, Function and Regulation of Cell Surface and Intracellular Immune Receptors in Solanaceae

Kim

Castroverde

2020

Plants

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The first layer of the plant immune system comprises plasma membrane-localized receptor proteins and intracellular receptors of the nucleotide-binding leucine-rich repeat protein superfamily. Together, these immune receptors act as a network of surveillance machines in recognizing extracellular and intracellular pathogen invasion-derived molecules, ranging from conserved structural epitopes to virulence-promoting effectors. Successful pathogen recognition leads to physiological and molecular changes in the host plants, which are critical for counteracting and defending against biotic attack. A breadth of significant insights and conceptual advances have been derived from decades of research in various model plant species regarding the structural complexity, functional diversity, and regulatory mechanisms of these plant immune receptors. In this article, we review the current state-of-the-art of how these host surveillance proteins function and how they are regulated. We will focus on the latest progress made in plant species belonging to the Solanaceae family, because of their tremendous importance as model organisms and agriculturally valuable crops.

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Wounding induces tomato Ve1 R-gene expression

Cited by 10 publications

References 37 publications

The barley leaf rust resistance gene Rph3 encodes a putative executor protein

The barley leaf rust resistance gene Rph3 encodes a putative executor protein

Opportunities and Challenges in Studies of Host-Pathogen Interactions and Management of Verticillium dahliae in Tomatoes

Diversity, Function and Regulation of Cell Surface and Intracellular Immune Receptors in Solanaceae

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