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Plant disease resistance

About: Plant disease resistance is a research topic. Over the lifetime, 12952 publications have been published within this topic receiving 381820 citations. The topic is also known as: plant innate immunity.


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Journal ArticleDOI
TL;DR: Transgenic grapevines obtained showed enhanced resistance against powdery mildew caused by Uncinula necator and exhibited slight resistance against Elisinoe ampelina inducing anthracnose, resulting in a reduction in disease lesions.
Abstract: The rice chitinase gene (RCC2), classified as class I chitinase, was introduced into the somatic embryos of grapevine (Vitis vinifera L. cv. Neo Muscut) by Agrobacterium infection. After co-cultivation with Agrobacterium, somatic embryos were transferred onto Murashige and Skoog hormone-free medium supplemented with 50 mg/l kanamycin. Transformed secondary or tertiary embryos were selected, and then more than 20 transgenic plantlets were recovered. Two transformants showed enhanced resistance against powdery mildew caused by Uncinula necator. Few disease symptoms were observed on leaves of these transformants compared with those of the non-transformant, although browning and necrotic symptoms, which seemed to constitute a hypersensitive reaction, were observed. Scanning electron microscopic observation revealed that conidial germination, mycelial growth and conidial formation were suppressed on the leaf surface of the transformant. The transgenic grapevines obtained also exhibited slight resistance against Elisinoe ampelina inducing anthracnose, resulting in a reduction in disease lesions. The relationship between the expression of the foreign chitinase gene and the disease resistance is discussed.

241 citations

Journal ArticleDOI
TL;DR: This work reports the map-based cloning of Fhb1 from a Chinese wheat cultivar Sumai 3, and identifies a new type of durable plant resistance gene conferring quantitative disease resistance to plants against Fusarium species.
Abstract: Fusarium head blight (FHB), caused by Fusarium graminearum, is a devastating disease of wheat and barley that leads to reduced yield and mycotoxin contamination of grain, making it unfit for human consumption. FHB is a global problem, with outbreaks in the United States, Canada, Europe, Asia and South America. In the United States alone, total direct and secondary economic losses from 1993 to 2001 owing to FHB were estimated at $7.67 billion. Fhb1 is the most consistently reported quantitative trait locus (QTL) for FHB resistance breeding. Here we report the map-based cloning of Fhb1 from a Chinese wheat cultivar Sumai 3. By mutation analysis, gene silencing and transgenic overexpression, we show that a pore-forming toxin-like (PFT) gene at Fhb1 confers FHB resistance. PFT is predicted to encode a chimeric lectin with two agglutinin domains and an ETX/MTX2 toxin domain. Our discovery identifies a new type of durable plant resistance gene conferring quantitative disease resistance to plants against Fusarium species.

240 citations

Journal ArticleDOI
TL;DR: In this article, a recessive mutation, designated mos3 (for modifier of snc 1,3 ), was found to suppress the constitutive pathogenesis-related gene expression and resistance to virulent Pseudomonas syringae maculicola ES4326 and Peronospora parasitica Noco2 in snc1.
Abstract: The Arabidopsis thaliana suppressor of npr1-1 , constitutive 1 ( snc1 ) mutant contains a gain-of-function mutation in a Toll Interleukin1 receptor-nucleotide binding-Leu-rich repeat–type resistance gene ( R -gene), which leads to constitutive activation of disease resistance response against pathogens. In a screen for suppressors of snc1 , a recessive mutation, designated mos3 (for modifier of snc1,3 ), was found to suppress the constitutive pathogenesis-related gene expression and resistance to virulent Pseudomonas syringae maculicola ES4326 and Peronospora parasitica Noco2 in snc1 . In addition, mos3 is also compromised in resistance mediated by Resistance to Peronospora parasitica 4 ( RPP4 ), Resistance to Pseudomonas syringae pv maculicola ( RPM1 ), and Resistance to Pseudomonas syringae 4 ( RPS4 ). Single mutant mos3 plants exhibited enhanced disease susceptibility to P. s. pv maculicola ES4326, suggesting that MOS3 is required for basal resistance to pathogens as well. mos3-1 was identified by map-based cloning, and it encodes a protein with high sequence similarity to human nucleoporin 96. Localization of the MOS3-green fluorescent protein fusion to the nuclear envelope further indicates that MOS3 may encode a nucleoporin, suggesting that nuclear and cytoplasmic trafficking plays an important role in both R -gene–mediated and basal disease resistance.

240 citations

Book ChapterDOI
01 Jan 1992
TL;DR: Unlike chordate animals, plants have not evolved a single primary mechanism for dealing with a broad spectrum of pathogens, so they have resorted to a variety of structural and biochemical defense mechanisms more or less tailored to individual pathogens.
Abstract: Unlike chordate animals, plants have not evolved a single primary mechanism for dealing with a broad spectrum of pathogens. Instead, plants have resorted to a variety of structural and biochemical defense mechanisms more or less tailored to individual pathogens. Many of the structures and compounds associated with the resistance of plants to pathogenic infection have been identified and studied for decades by plant pathologists, physiologists and biochemists. Similarly, genetic variation has been noted between plant lines in resistance to particular plant pathogens or pathogen races for most of the plant::pathogen interactions that have been studied. And, in over 200 cases, the differential susceptibility has been attributed to allelic variation at major resistance (or “R”) genes. Surprisingly, in only two cases have inherited resistances been clearly associated with the presence or absence of an identified biochemical resistance activity, and neither of these seem to be a common mechanism of resistance (1,2).

238 citations

Journal ArticleDOI
TL;DR: Results indicate that WRKY46, WRKY70, and WRKY53 positively regulate basal resistance to P. syringae; and that they play overlapping and synergetic roles in plant basal defense.

237 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023377
2022756
2021410
2020438
2019526
2018640