Histopathology of Susceptible and Resistant Capsicum annuum Cultivars Infected with Ralstonia solanacearum

Rahman, MM; Abdullah, Hiryati; Vanhaecke, Mieke

doi:10.1111/j.1439-0434.1999.tb03819.x

Cited by 33 publications

(21 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ponderosa (Ishihara et al, 2012). Histopathological studies of resistant and susceptible tomato found that R. solanacearum colonized fewer xylem vessels in wilt-resistant varieties (Grimault et al, 1994; Rahman et al, 1999). It is therefore possible that physical barriers to pathogen spread may be a component of tomato resistance to bacterial wilt.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Hydroxycinnamic Acid Degradation, a Broadly Conserved Trait, ProtectsRalstonia solanacearumfrom Chemical Plant Defenses and Contributes to Root Colonization and Virulence

Lowe¹,

Ailloud²,

Allen³

2015

MPMI

View full text Add to dashboard Cite

Plants produce hydroxycinnamic acid defense compounds (HCAs) to combat pathogens, such as the bacterium Ralstonia solanacearum. We showed that an HCA degradation pathway is genetically and functionally conserved across diverse R. solanacearum strains. Further, a Δfcs (feruloyl-CoA synthetase) mutant that cannot degrade HCAs was less virulent on tomato plants. To understand the role of HCA degradation in bacterial wilt disease, we tested the following hypotheses: HCA degradation helps the pathogen (1) grow, as a carbon source; (2) spread, by reducing physical barriers HCA-derived; and (3) survive plant antimicrobial compounds. Although HCA degradation enabled R. solanacearum growth on HCAs in vitro, HCA degradation was dispensable for growth in xylem sap and root exudate, suggesting that HCAs are not significant carbon sources in planta. Acetyl-bromide quantification of lignin demonstrated that R. solanacearum infections did not affect the gross quantity or distribution of stem lignin. However, the Δfcs mutant was significantly more susceptible to inhibition by two HCAs: caffeate and p-coumarate. Finally, plant colonization assays suggested that HCA degradation facilitates early stages of infection and root colonization. Together, these results indicated that ability to degrade HCAs contributes to bacterial wilt virulence by facilitating root entry and by protecting the pathogen from HCA toxicity.

show abstract

Section: Discussionmentioning

confidence: 99%

“…lycopersici , leads to increased accumulation of the HCAs ferulate and p -coumarate (Mandal and Mitra, 2008). Ultrastructure studies of xylem infected with the vascular pathogen Ralstonia solanacearum show phenomena consistent with phenolic release (Mueller and Beckman, 1984; Grimault et al, 1994; Rahman et al, 1999; Nakaho et al, 2000). …”

Section: Introductionmentioning

confidence: 96%

Hydroxycinnamic Acid Degradation, a Broadly Conserved Trait, ProtectsRalstonia solanacearumfrom Chemical Plant Defenses and Contributes to Root Colonization and Virulence

Lowe¹,

Ailloud²,

Allen³

2015

MPMI

View full text Add to dashboard Cite

show abstract

“…For decades and in several countries, breeders of solanaceous crops have identified and used intra-or interspecific sources of resistance for creating bacterial wilt resistant cultivars of tomato, eggplant, and pepper (TEP) (2,3,14,27,31,45,50,51,62,67,69,74,75). However, significant interactions of cultivar-location highlighted the importance of both site environmental conditions and pathogen population variability for the three species (3,32,39,(50)(51)(52)57,74).…”

mentioning

confidence: 99%

Bacterial Wilt Resistance in Tomato, Pepper, and Eggplant: Genetic Resources Respond to Diverse Strains in the Ralstonia solanacearum Species Complex

Lebeau¹,

Daunay²,

Frary³

et al. 2011

Phytopathology®

182

154

View full text Add to dashboard Cite

Bacterial wilt, caused by strains belonging to the Ralstonia solanacearum species complex, inflicts severe economic losses in many crops worldwide. Host resistance remains the most effective control strategy against this disease. However, wilt resistance is often overcome due to the considerable variation among pathogen strains. To help breeders circumvent this problem, we assembled a worldwide collection of 30 accessions of tomato, eggplant and pepper (Core-TEP), most of which are commonly used as sources of resistance to R. solanacearum or for mapping quantitative trait loci. The Core-TEP lines were challenged with a core collection of 12 pathogen strains (Core-Rs2) representing the phylogenetic diversity of R. solanacearum. We observed six interaction phenotypes, from highly susceptible to highly resistant. Intermediate phenotypes resulted from the plants' ability to tolerate latent infections (i.e., bacterial colonization of vascular elements with limited or no wilting). The Core-Rs2 strains partitioned into three pathotypes on pepper accessions, five on tomato, and six on eggplant. A “pathoprofile” concept was developed to characterize the strain clusters, which displayed six virulence patterns on the whole set of Core-TEP host accessions. Neither pathotypes nor pathoprofiles were phylotype specific. Pathoprofiles with high aggressiveness were mainly found in strains from phylotypes I, IIB, and III. One pathoprofile included a strain that overcame almost all resistance sources.

show abstract

“…Although a hypersensitive type of response to R. solanacearum has been reported in some species (Arlat et al, 1994;Carney and Denny, 1990), none of these Capsicum pepper accessions was found hypersensitive or immune. Rahman et al (1999) found that restriction of the spread of the pathogen was associated with resistance to bacterial wilt in C. annuum and was mainly attributed to some induced, morphological and physical barriers. In addition, KC995, KC1006, and KC1027 of them were also resistant to bacterial spot caused by Xanthomonas euvesicatoria (Tran and Kim, 2007).…”

mentioning

confidence: 99%

Sources of Resistance to Bacterial Wilt Found in Vietnam Collections of Pepper (Capsicum annuum) and Their Nuclear Fertility Restorer Genotypes for Cytoplasmic Male Sterility

Tran¹,

Kim²

2012

The Plant Pathology Journal

View full text Add to dashboard Cite

Histopathology of Susceptible and Resistant Capsicum annuum Cultivars Infected with Ralstonia solanacearum

Cited by 33 publications

References 25 publications

Hydroxycinnamic Acid Degradation, a Broadly Conserved Trait, ProtectsRalstonia solanacearumfrom Chemical Plant Defenses and Contributes to Root Colonization and Virulence

Hydroxycinnamic Acid Degradation, a Broadly Conserved Trait, ProtectsRalstonia solanacearumfrom Chemical Plant Defenses and Contributes to Root Colonization and Virulence

Bacterial Wilt Resistance in Tomato, Pepper, and Eggplant: Genetic Resources Respond to Diverse Strains in the Ralstonia solanacearum Species Complex

Sources of Resistance to Bacterial Wilt Found in Vietnam Collections of Pepper (Capsicum annuum) and Their Nuclear Fertility Restorer Genotypes for Cytoplasmic Male Sterility

Contact Info

Product

Resources

About