Interactions between a fluorescent pseudomonad, an arbuscular mycorrhizal fungus and a hypovirulent isolate of<i>Rhizoctonia solani</i>affect plant growth and root architecture of tomato plants

Gamalero, Elisa; Pivato, Barbara; Bona, Elisa; Copetta, Andrea; Avidano, Lorena; Lingua, Graziano; Berta, Graziella

doi:10.1080/11263504.2010.489315

Cited by 14 publications

(9 citation statements)

References 51 publications

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“…For non-mycorrhizal root systems infection was indeed higher on the more highly branched roots, but this was not observed in mycorrhizal root systems. Similar findings in different AMF-pathosystems were also reported later ( Fusconi et al, 1999 ; Gange, 2000 ; Vigo et al, 2000 ; Gamalero et al, 2010 ), pointing toward other mechanisms involved in the AMF-mediated biocontrol. Although such experiments have not been performed specifically with PPN, similar mechanisms can be expected to play a role as well.…”

Section: Enhanced Plant Tolerancesupporting

confidence: 87%

“…Apart from an increased nutrient status, mycorrhizal plants often show increased root growth and branching ( Gamalero et al, 2010 ; Orfanoudakis et al, 2010 ; Gutjahr and Paszkowski, 2013 ). The root morphology responses resulting from AMF colonization seem to depend on plant characteristics, with tap roots for example appearing to profit more from AMF than fibrous roots in terms of gained biomass and nutrient acquisition ( Yang et al, 2014 ).…”

Section: Enhanced Plant Tolerancementioning

confidence: 99%

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Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant-Parasitic Nematodes: A Review of the Mechanisms Involved

Schouteden

Waele

Panis³

et al. 2015

Front. Microbiol.

233

135

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Arbuscular mycorrhizal fungi (AMF) are obligate root symbionts that can protect their host plant against biotic stress factors such as plant-parasitic nematode (PPN) infection. PPN consist of a wide range of species with different life styles that can cause major damage in many important crops worldwide. Various mechanisms have been proposed to play a role in the biocontrol effect of AMF against PPN. This review presents an overview of the different mechanisms that have been proposed, and discusses into more detail the plausibility of their involvement in the biocontrol against PPN specifically. The proposed mechanisms include enhanced plant tolerance, direct competition for nutrients and space, induced systemic resistance (ISR) and altered rhizosphere interactions. Recent studies have emphasized the importance of ISR in biocontrol and are increasingly placing rhizosphere effects on the foreground as well, both of which will be the focal point of this review. Though AMF are not yet widely used in conventional agriculture, recent data help to develop a better insight into the modes of action, which will eventually lead toward future field applications of AMF against PPN. The scientific community has entered an exciting era that provides the tools to actually unravel the underlying molecular mechanisms, making this a timely opportunity for a review of our current knowledge and the challenges ahead.

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Section: Enhanced Plant Tolerancesupporting

confidence: 87%

Section: Enhanced Plant Tolerancementioning

confidence: 99%

Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant-Parasitic Nematodes: A Review of the Mechanisms Involved

Schouteden

Waele

Panis³

et al. 2015

Front. Microbiol.

233

135

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“…, 1996), Rhizoctonia solani (Berta et al. , 2005; Gamalero et al. , 2010c) and phytoplasmas (Lingua et al.…”

Section: Methodsmentioning

confidence: 99%

Increased plant tolerance against chrysanthemum yellows phytoplasma (‘Candidatus Phytoplasma asteris’) following double inoculation with Glomus mosseae BEG12 and Pseudomonas putida S1Pf1Rif

D’Amelio¹,

Berta²,

Gamalero³

et al. 2011

Plant Pathology

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The aim of this work was to assess the effects of a combined inoculum of a rhizobacterium and an arbuscular mycorrhizal (AM) fungus on plant responses to phytoplasma infection, and on phytoplasma multiplication and viability in Chrysanthemum carinatum plants infected by chrysanthemum yellows phytoplasma (CY). Combined inoculation with Glomus mosseae BEG12 and Pseudomonas putida S1Pf1Rif resulted in some resistance to phytoplasma infection (about 30%), delayed symptom expression in nonresistant plants, improved growth of the aerial part of the infected plants (+68AE1%), and altered root morphology (root tip number: +49AE9%; branching degree: +82AE8%). Combined inoculation with the two beneficial microorganisms did not alter CY multiplication and viability. In inoculated and infected plants, phytoplasma morphology was typical of senescent cells. A more active and efficient root system in double-inoculated plants probably mediated the effects of the two rhizospheric microorganisms in the infected plants. The practical application of rhizospheric microorganisms for mitigating phytoplasma damage, following evaluation under field conditions, represents an additional tool for the integrated management of phytoplasmosis.

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“…It does not allow the evaluation of inter-and intra-specific variations. Other studies investigated, on a very limited number of cultivars, the effects of various environmental or cultural factors on particular root characteristics, such as total mass, length, or number (e.g., Gamalero et al 2004Gamalero et al , 2010Nakano 2007;Gautam et al 2012;Tracy et al 2012), or their depth distribution in the field (e.g., Thomas 1999;Gough 2001;Ibarra-Jimenez et al 2011). The genetic diversity of some root morphological attributes was addressed recently on peppers by Kulkarni and Phalke (2009) and by Peláez-Anderica et al (2011).…”

Section: Introductionmentioning

confidence: 97%

Root system development and architecture in various genotypes of the Solanaceae family

Bui

Serra

Pagès

2015

Botany

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We present an extensive, dynamic, and quantitative study of the root system architecture of Solanaceae based on 29 genotypes from three important groups (aubergines, capsicums, and tomatoes). Quantitative traits were essentially obtained from measurements made on high resolution images of different plant parts at several stages. The developmental schema was common to all genotypes. Several traits showed significant genetic variations: root apical diameter (reflecting meristem size), interbranch distances, slopes of the regression lines of elongation rate versus apical diameter, and ratios of diameters of laterals to mother roots. On all genotypes, the initial root system was complemented by a strong adventitious system emerging near the plant collar, made up of a set of fast growing roots with large apical diameters. Correlations between traits were evidenced within the root systems on one hand (e.g., interbranch distance and diameter ratio of laterals to their mother) and between shoot and root on the other hand (e.g., leaf area growth rate and root elongation rate). They revealed both trade-offs in developmental processes and coordination between plant parts. Beyond these results, we demonstrated the importance of characterizing phenotypes through multiple criteria, considering the whole plant and including late stages.Résumé : Nous présentons une étude dynamique et quantitative de l'architecture racinaire des Solanaceae conduite sur 29 génotypes parmi trois groupes (aubergines, piments et tomates). Les traits quantitatifs ont été obtenus essentiellement à partir de mesures faites sur des images haute-résolution de différentes parties de la plante. Le schéma de développement est commun à tous les génotypes. Plusieurs traits présentent des variations génétiques significatives : diamètres apicaux des racines (reflétant la taille des méristèmes), ratio des diamètres entre racines latérales et racines mères, distances inter-ramification et pentes des régressions entre diamètre apical et vitesse d'élongation. Sur l'ensemble des génotypes, le système racinaire initial est complété par un système adventif puissant composé de multiples racines ayant de gros méristèmes apicaux. Des corrélations existent entre traits racinaires d'une part (p. ex. entre distance inter-ramification et ratio de diamètres des latérales sur leur mère) et entre traits aérien et racinaire d'autre part (p. ex. vitesse relative de croissance des feuilles et vitesse d'élongation de racines individuelles). Ces corrélations révèlent des compromis de développement et des coordinations entre parties de la plante. Au-delà des résultats, nous avons démontré l'intérêt de caractériser les phénotypes racinaires à travers de multiples critères, en considérant aussi la plante entière et en intégrant des stades avancés.

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Interactions between a fluorescent pseudomonad, an arbuscular mycorrhizal fungus and a hypovirulent isolate ofRhizoctonia solaniaffect plant growth and root architecture of tomato plants

Cited by 14 publications

References 51 publications

Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant-Parasitic Nematodes: A Review of the Mechanisms Involved

Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant-Parasitic Nematodes: A Review of the Mechanisms Involved

Increased plant tolerance against chrysanthemum yellows phytoplasma (‘Candidatus Phytoplasma asteris’) following double inoculation with Glomus mosseae BEG12 and Pseudomonas putida S1Pf1Rif

Root system development and architecture in various genotypes of the Solanaceae family

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