Biocontrol of the pathogen <i>Phytophthora parasitica</i> by arbuscular mycorrhizal fungi is a consequence of effects on infection loci

Vigo, C.L.S.; Norman, J. R.; Hooker, J. E.

doi:10.1046/j.1365-3059.2000.00473.x

Cited by 139 publications

(68 citation statements)

References 21 publications

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“…As mudas micropropagadas no sistema atual podem ir a campo com diversos porcentuais de colonização micorrízica, eventualmente até sem a presença do fungo. O estabelecimento do FMA antes do ataque do patógeno pode induzir aumento da resistência da planta (Mark & Cassels, 1996;Vigo et al, 2000).…”

Section: Introductionunclassified

Redução do mal-do-panamá em bananeira-maçã por inoculação de fungo micorrízico arbuscular

Borges

Trindade²,

Matos³

et al. 2007

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da densidade de inóculo de fungo micorrízico arbuscular (FMA) na incidência e severidade do Fusarium oxysporum f. sp. cubense (FOC) na bananeira, variedade 'Maçã', em fase inicial de desenvolvimento vegetativo. O trabalho foi realizado em três etapas, em condições de casa de vegetação, na Embrapa Mandioca e Fruticultura Tropical, Cruz das Almas, BA. Foi realizado um teste de ajuste para determinação das densidades de inóculo do FMA a serem utilizadas. Em seguida, o FMA, Gigaspora margarita, foi inoculado nas mudas de banana e, depois de 60 dias foi inoculado o FOC. G. margarita apresentou eficiência simbiótica no crescimento das mudas de bananeira, variedade Maçã, dependendo da densidade de inóculo. A inoculação prévia com o FMA promoveu redução no índice de infecção causado pelo FOC. A pré-colonização das plantas de bananeira pelo FMA resultou em efeito de bioproteção, modulado pela taxa de colonização micorrízica e pela concentração de inóculo do FOC no solo.Termos para indexação: Musa sp., Gigaspora margarita, murcha-de-fusário, biocontrole, fusariose. Reduction of fusarium wilt of "banana-maçã" by inoculation of arbuscular mycorrhizal fungiAbstract -This work aimed to evaluate inoculum density of arbuscular mycorrhizal fungi (AMF) on incidence and effects of Fusarium oxysporum f. sp. cubense (FOC) on Maçã variety of banana (Musa sp.) during its initial growth. An experiment was conducted at Embrapa Mandioca e Fruticultura Tropical, under greenhouse conditions, comprising three stages: a test to adjust levels of inoculum of AMF to be set on the experiment was carried out; therefore, plantlets of banana were inoculated with Gigaspora margarita and, after 60 days, they were inoculated with FOC. G. margarita was efficient for growth of banana plantlets; previous inoculation of AMF reduced disease index caused by FOC, depending on level of inoculum of AMF; previous inoculation of AMF on banana plantlets resulted in bioprotection to FOC, related to level of colonization and level of inoculum of FOC in soil.

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Section: Introductionunclassified

Redução do mal-do-panamá em bananeira-maçã por inoculação de fungo micorrízico arbuscular

Borges

Trindade²,

Matos³

et al. 2007

Pesq. agropec. bras.

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“…Indeed, co-culture of the non-mycorrhizal species Dianthus caryophyllus with the mycorrhizal species Tagetes patula in presence of G. intraradices clearly reduced the disease caused by F. o. dianthi in D. caryophyllus in a manner clearly unrelated to plant nutrition which suggests a reduction in the pathogen development within the mycorrhizosphere (St-Arnaud et al, 1997). Moreover, a reduction in the number of infection loci of tomato roots pre-colonized with G. mosseae and inoculated with P. nicotianae zoospores infers that the pathogen may be affected prior to root penetration in the mycorrhizosphere (Vigo et al, 2000).…”

Section: The Mycorrhizosphere: a Zone Unfavorable To Pathogen Developmentioning

confidence: 94%

The role of the arbuscular mycorrhiza-associated rhizobacteria in the biocontrol of soilborne phytopathogens: a review

Lioussanne

2013

Span. j. agric. res.

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The mutualistic symbiosis of most land plants with arbuscular mycorrhizal (AM) fungi has been shown to favor mineral and water nutrition and to increase resistance to abiotic and biotic stresses. This review reports the main mechanisms involved in the control of the disease symptoms and of the intraradical proliferation of soilborne phytopathogens by root colonization with AM fungi, with a special emphasis on the role of the rhizobacteria shown to be specifically associated with the AM extraradical network and the mycorrhizosphere (the soil zone with particular characteristics under the influence of the root/AM association). The mycorrhizosphere would constitute an environment conducive to microorganisms antagonistic to pathogen proliferation. Moreover, attempts to identify rhizobacteria from AM structures and/or the mycorrhizosphere often lead to the isolation of organisms showing strong properties of antagonism on various soilborne pathogens. The ability of AM fungi to control soilborne diseases would be strongly related to their capacity to specifically stimulate the establishment of rhizobacteria unfavorable to pathogen development within the mycorrhizosphere before root infection. Current knowledge concerning the mechanisms involved in AM/rhizobacteria interactions are also described in this review.Additional key words: AM-associated bacteria (AMB), arbuscular mycorrhizal fungi, biocontrol, mycorrhizosphere, Paenibacillus, soilborne pathogens. ResumenRevisión. El papel de las rizobacterias asociadas a micorrizas arbusculares en el control biológico de fitopatógenos del suelo La simbiosis micorriza arbuscular (MA), presente en la mayoría de las plantas terrestres, favorece la nutrición mineral, la captación de agua e incrementa la resistencia a estreses abióticos y bióticos. En esta revisión se recogen los principales mecanismos, ligados a la colonización de las raíces por hongos MA, implicados en el control de síntomas ligados a enfermedades y en el control de la proliferación intraradical de fitopatógenos del suelo. Se hace un énfasis especial en el papel de las rizobacterias asociadas específicamente a la red de micelio extraradical de los hongos MA y a la micorrizosfera (zona de suelo con características especiales debidas a la influencia de la asociación hongo/planta). La micorrizosfera constituiría un entorno propicio para el desarrollo de microorganismos antagónicos a la proliferación de patógenos. Los estudios realizados sobre rizobacterias asociadas a estructuras de hongos MA o de la micorrizosfera han conducido en muchas ocasiones al aislamiento de organismos con características antagonistas frente a patógenos del suelo. La capacidad de los hongos MA para controlar enfermedades de suelo estaría fuertemente relacionada con su capacidad para estimular específicamente el establecimiento de rizobacterias en la micorrizosfera desfavorables para el desarrollo de patógenos antes de que estos puedan infectar la raíz. En esta revisión también se describen los conocimientos actuales sobre los mecanis...

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“…It has been found that the chemical treatments are not efficient in controlling these diseases and pests. AMF has been demonstrated to have high biocontrol potential of plants against many pests (Quarles, 1999), especially for plant diseases caused by Phytophtora and Fusarium pathogens (Vigo et al, 2000). These observations suggest that AMF may affect plant and soil microbial activities by stimulating the production of root exudates, phytoalexins, and phenolic compounds (Morandi, 1996;Jaiti et al, 2007).…”

Section: Mycorrhizal Fungi As Bioprotectants In Date Palmsmentioning

confidence: 99%

Application of mycorrhizae in sustainable date palm cultivation

Al‐Karaki¹

2013

Emir. J. Food Agric

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Date palm (Phoenix dactylifera) is a significant and developing crop especially in the Arabian Peninsula, the Middle East and North Africa regions. The area under cultivation of this tree is increasing annually. Date palms usually grown under harsh and unfavorable growing conditions with low rainfall and high rates of evaporation as well as in soils with low organic matter and nutrient deficiencies. Hence, date palm cultivation becomes dependent on application of high levels of fertilizers as well as on irrigation. This may lead to salinization of soil and leaching of nutrients to deep soils that might affect ground water. Therefore, it is important that date palm plantations are managed in a sustainable way to reduce the impact of date palm cultivation on ecosystems while maximizing dates yield through using such practices as mycorrhizal fungi technology. The application of mycorrhizal fungi technology is an option that can benefit both agronomic plant health and ecosystems. Mycorrhizae confer numerous benefits to host plants including improved plant growth and mineral nutrition, water uptake, tolerance to diseases and stresses such as drought, temperature fluctuation, metal toxicity and salinity. Mycorrhizae may also play a role in the formation of stable soil aggregates, building up a macro porous structure of soil that allows penetration of water and air and prevents erosion. All of these beneficial effects on plant health and soil fitness mean that mycorrhizae have the potential to increase agricultural productivity and are crucial for the sustainable functioning of agricultural ecosystems. This study provides an insight into the application of mycorrhizae in date palm cultivation.

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Biocontrol of the pathogen Phytophthora parasitica by arbuscular mycorrhizal fungi is a consequence of effects on infection loci

Cited by 139 publications

References 21 publications

Redução do mal-do-panamá em bananeira-maçã por inoculação de fungo micorrízico arbuscular

Redução do mal-do-panamá em bananeira-maçã por inoculação de fungo micorrízico arbuscular

The role of the arbuscular mycorrhiza-associated rhizobacteria in the biocontrol of soilborne phytopathogens: a review

Application of mycorrhizae in sustainable date palm cultivation

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