Morphogenetic effects induced by pathogenic and non pathogenic<i>Rhizoctonia solani</i>Kühn strains on tomato roots

Sampò, S.; Avidano, Lorena; Berta, Graziella

doi:10.1080/00087114.2007.10589563

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…In an evaluation of virulence of Pythium debaryanum and Pythium ultimum (causal agents of root rot) on T. aestivum , plants with high root length had less fungal infection ( Higginbotham et al, 2004 ). In contrast, infection of Rhizoctonia solani (causal agent of root rot) on S. lycopersicum caused reduction in total root length, number of root tips, and magnitude of root branching, which compromised water exploration from deep soil layers and consequently the shoot growth ( Berta et al, 2005 ; Simonetta et al, 2007 ). Thus there seems to be a correlation between RLD and the extent of pathogen infection by root infecting fungi.…”

Section: Potential Traits For Screening Genotypes For Tolerance To Comentioning

confidence: 99%

Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits

et al. 2017

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Global warming leads to the concurrence of a number of abiotic and biotic stresses, thus affecting agricultural productivity. Occurrence of abiotic stresses can alter plant–pest interactions by enhancing host plant susceptibility to pathogenic organisms, insects, and by reducing competitive ability with weeds. On the contrary, some pests may alter plant response to abiotic stress factors. Therefore, systematic studies are pivotal to understand the effect of concurrent abiotic and biotic stress conditions on crop productivity. However, to date, a collective database on the occurrence of various stress combinations in agriculturally prominent areas is not available. This review attempts to assemble published information on this topic, with a particular focus on the impact of combined drought and pathogen stresses on crop productivity. In doing so, this review highlights some agriculturally important morpho-physiological traits that can be utilized to identify genotypes with combined stress tolerance. In addition, this review outlines potential role of recent genomic tools in deciphering combined stress tolerance in plants. This review will, therefore, be helpful for agronomists and field pathologists in assessing the impact of the interactions between drought and plant-pathogens on crop performance. Further, the review will be helpful for physiologists and molecular biologists to design agronomically relevant strategies for the development of broad spectrum stress tolerant crops.

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Section: Potential Traits For Screening Genotypes For Tolerance To Comentioning

confidence: 99%

Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits

et al. 2017

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“…Such impacts can be either direct (higher density of susceptible tissue in dense canopies) or mediated by altered microclimate gradients within canopies [3]. Conversely, architectural traits can Genes 2023, 14, 1399 2 of 26 be modified by the development of epidemics as evidenced for the root architecture of tomato [4,5], pea [6], or Medicago truncatula [7]. Similar effects are noted in aerial diseases, leading to partial or complete defoliation of the host.…”

Section: Introductionmentioning

confidence: 98%

Five Regions of the Pea Genome Co-Control Partial Resistance to D. pinodes, Tolerance to Frost, and Some Architectural or Phenological Traits

Boutet

Lavaud

Lesné

et al. 2023

Genes

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Evidence for reciprocal links between plant responses to biotic or abiotic stresses and architectural and developmental traits has been raised using approaches based on epidemiology, physiology, or genetics. Winter pea has been selected for years for many agronomic traits contributing to yield, taking into account architectural or phenological traits such as height or flowering date. It remains nevertheless particularly susceptible to biotic and abiotic stresses, among which Didymella pinodes and frost are leading examples. The purpose of this study was to identify and resize QTL localizations that control partial resistance to D. pinodes, tolerance to frost, and architectural or phenological traits on pea dense genetic maps, considering how QTL colocalizations may impact future winter pea breeding. QTL analysis revealed five metaQTLs distributed over three linkage groups contributing to both D. pinodes disease severity and frost tolerance. At these loci, the haplotypes of alleles increasing both partial resistance to D. pinodes and frost tolerance also delayed the flowering date, increased the number of branches, and/or decreased the stipule length. These results question both the underlying mechanisms of the joint control of biotic stress resistance, abiotic stress tolerance, and plant architecture and phenology and the methods of marker-assisted selection optimizing stress control and productivity in winter pea breeding.

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“…It causes very serious diseases of wide varieties of plants ranging from damping-off till stem canker led to dramatic effects on plant nutrition and its physiology (Baker, 1970;Hanounik, 1978;Anderson, 1982;Salt, 1982;Ogoshi, 1987, Wallwork, 1996Hsiang et al, 2006, Simonetta et al, 2007Kammerer and Harmon, 2008). Infection structure of this fungus was studied either under light microscopy or by using scanning electron microscopy (SEM).…”

Section: Introductionmentioning

confidence: 99%

Behavior of fungus Rhizoctonia solani under faba bean cotyledons when away from host and the effect of its starvation on aggressiveness

Mohamed¹,

M²,

H³

et al. 2014

J. Yeast Fungal Res.

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Behavior of Rhizoctonia solani on their hosts was carried out-in many studies when the pathogen was in close proximity with its host. The purpose of this study was focused on the behavior of this fungus on faba bean cotyledons when it was away from the host and the effect of nutritional status on its pathogenicity was also taken into consideration. Observations led to speculation that R. solani feels its host even when it was away from it and begins to assemble its strength to grow toward the host then start to form its pathogenic structures when it reach it. Scanning electron microscopic (SEM) observations which was carried out after 24, 48 and 72 h from exposing the pathogen to the host when the fungus was away from it revealed that when the hyphal pathogen feel the host, they swell and some hyphae begin to differentiate and appear very thick, forming likelihood mycelial strands and such hyphae grow vigorously and vertically toward the host. Starvation of the pathogen was found to be vital factor in R. solani pathogencity. Growing of the fungus on water ager led to dramatic increase in the pathogen. This strength was confirmed by visual determination of disease severity and by determination of polyphenol oxidase activity in infected cotyledons. These results exclude the role of host exudates in the attraction of the R. solani toward its host.

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Morphogenetic effects induced by pathogenic and non pathogenicRhizoctonia solaniKühn strains on tomato roots

Cited by 10 publications

References 10 publications

Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits

Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits

Five Regions of the Pea Genome Co-Control Partial Resistance to D. pinodes, Tolerance to Frost, and Some Architectural or Phenological Traits

Behavior of fungus Rhizoctonia solani under faba bean cotyledons when away from host and the effect of its starvation on aggressiveness

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