Resistência de genótipos de araçazeiros a Meloidogyne enterolobii

Biazatti, Marlon Altoé; Souza, Ricardo Moreira; Marinho, Cláudia Sales; Guilherme, Denílson de Oliveira; Campos, Graziella Siqueira; Gomes, Vicente Martins; Bremenkamp, Cintia Aparecida

doi:10.1590/0103-8478cr20140488

Cited by 15 publications

(8 citation statements)

References 6 publications

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“…enterolobii did not multiply in the species yellowaraçá (Psidium cattleyanum) and Costa Rican guava (P. friedrichsthalianum), which were classified as resistant, with RF < 1 (Table 1), corroborating results in the literature (Freitas et al, 2014;Biazatti et al, 2016). Freitas et al (2014) observed that the roots of yellow-araçá (Psidium cattleyanum) and Costa Rican guava (P. friedrichsthalianum) were infected by M. enterolobii and the J2 induced formation of feeding sites, but, about 30 days after inoculation, the giant cells deteriorated and most of the specimens of M. enterolobii did not reach maturity.…”

Section: Resultssupporting

confidence: 88%

“…Some studies evaluated the reaction of araçá and guava trees to M. enterolobii and found sources of resistance (Almeida et al, 2009;Freitas et al, 2014;Biazatti et al, 2016). However, most of the evaluated species are susceptible to M. enterolobii and results diverge for some araçá species as in Psidium cattleyanum and P. friedrichsthalianum (Almeida et al, 2009;Freitas et al, 2014).…”

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confidence: 99%

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Reaction of potential guava rootstocks to Meloidogyne enterolobii

Chiamolera¹,

Martins

Soares

et al. 2018

Rev. Ceres

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Reação de possíveis porta-enxertos de goiabeira a Meloidogyne enterolobiiO nematoide das galhas, Meloidogyne enterolobii, é o principal problema fitossanitário para o cultivo da goiabeira. Entre as estratégias para o manejo deste nematoide, as melhores perspectivas estão na identificação ou no desenvolvimento de cultivares ou porta-enxertos resistentes. Buscando elucidar quais plantas poderão ser testadas como portaenxertos de goiabeira, um experimento foi conduzido em casa de vegetação com o objetivo de avaliar a reação de araçazeiros frente a M. enterolobii. Sete espécies de araçazeiros foram avaliadas (Eugenia stipitata, Psidium acutangulum, P. cattleyanum 'amarelo', P. friedrichsthalianum, P. guajava var. minor, P. guineense e Psidium sp.), as quais foram inoculadas com uma suspensão de 3.000 ovos de M. enterolobii, sendo utilizadas plantas de berinjela como tratamento controle. Durante as avaliações, foram determinados a massa fresca de raízes, o número de ovos e juvenis de segundo estádio (J2) por sistema radicular, o fator de reprodução [FR = Pf/Pi] e a reação dos araçazeiros. Os araçazeiros, E. stipitata, P. cattleyanum 'amarelo' e P. friedrichsthalianum tiveram fator de reprodução menor que um (FR<1), sendo, portanto, resistentes a M. enterolobii. Nesses araçazeiros houve bom desenvolvimento do sistema radicular e nas plantas suscetíveis (FR>1) foram observadas muitas galhas, elevado número de ovos e J2 e necroses nas raízes, com a presença de Fusarium solani e Rhizoctonia solani. Os araçazeiros, P. cattleyanum 'amarelo', P. friedrichsthalianum e E. stipitata são resistentes ao M. enterolobii e podem ser testados como possíveis porta-enxertos de goiabeira.Palavras-chave: Psidium guajava; araçazeiros; nematoide das galhas; resistência genética. ABSTRACT RESUMO Reaction of potential guava rootstocks to Meloidogyne enterolobiiRoot-knot nematode Meloidogyne enterolobii is the main phytosanitary problem of guava cultivation in Brazil. Among the strategies to manage the problem, the best prospects are in identifying or developing cultivars or rootstocks that are resistant to this nematode. To identify plants with potential as rootstocks for guava, the reaction of araçá (wild guava) to M. enterolobii was assessed in a greenhouse experiment. Seven araçá species were evaluated (Eugenia stipitata, Psidium acutangulum, P. cattleyanum 'yellow', P. friedrichsthalianum, P. guajava var. minor, P. guineense, and Psidium sp.). The plants were inoculated with a suspension of 3,000 eggs of M. enterolobii, using eggplant as control treatment. The parameters fresh root mass, number of eggs and second stage juveniles (J2) per root system, the reproduction factor (RF = Pf/Pi), and araçá reaction were determined during the experiment. RF of the araçá species E. stipitata, P. cattleyanum 'yellow', and P. friedrichsthalianum was less than one (RP<1), therefore resistant to M. enterolobii. The araçá trees had good root system development and the susceptible plants showed many root galls, high number of eggs and J2, and Fusarium s...

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Section: Resultssupporting

confidence: 88%

mentioning

confidence: 99%

Reaction of potential guava rootstocks to Meloidogyne enterolobii

Chiamolera¹,

Martins

Soares

et al. 2018

Rev. Ceres

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“…After the infestation period and root extraction each genotype was evaluate to measure their reaction to the parasite. The cultivar Paluma chosen as a control genotype, which was previously reported to be susceptible to M. enterolobii [12][13][14][15]22] exhibited the highest value of galls index (GI=2.57).…”

Section: Resultsmentioning

confidence: 99%

“…To this date, several studies have been carried out to ind genotypes of guava resistant to the infection of root-knot nematodes. Psidium species, such as P. guineense and P. cattleyanum can be a source of resistance, which makes them important for the control of the damages caused by the nematode in question [12][13][14]. In the various studies aiming at the analysis of M. enterolobii infection on fruit plants, the period between inoculation and root extraction ranged from 60 to 135 days, with 120 days being the most common interval used for this stage [11][12][13]15], which makes the process of evaluation quite long and costly due to the crop handling costs of the plants.…”

Section: Introductionmentioning

confidence: 99%

Reaction of Psidium guineense and Psidium guajava genotypes to infection of Meloidogyne enterolobii

Filho¹,

Cavalcanti²,

Rossiter³

et al. 2018

J Plant Sci Phytopathol

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Psidium guajava (guava) is an important crop and economic resource in many tropical countries and Brazil stands out as one of its major commercial producers. The guava crop has been severely attacked by the plant parasitic nematode Meloidogyne enterolobii which has caused drastic reduction of productivity and, in some cases, even total loss of cultivated areas. The use of resistant rootstocks that are tolerant to these soil pathogens can be a low-cost solution to this pathogen, which has established itself as one of the major constraints for the cultivation of guava in Northeast Brazil. The objective of this work was to evaluate the reaction of P. guajava and P. guineense to M. enterolobii infection under greenhouse conditions, with an infection period of 60 days. 12 P. guineense, and 4 P. guajava were evaluated. The host response to the nematode infection was evaluated according to the following parameters: gill index (GI), reproductive factor (RF), and reduction of reproductive factor (RRF). Considering the RRF criteria, the P. guineense genotypes, AR1, AR3, AR4 and AR10 were considered resistant. The RF index was considered inadequate to evaluate resistance in the 60 days period, due the slow development of the parasite in P.guineense.

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“…The confirmation that these fruits possess beneficial substances (Hister et al, 2017) has generated a demand for consumption and the establishment of orchards, which has stimulated interest in the propagation of these plants. Research has also found that some cattley guava genotypes show promise for improving rootstocks or commercial canopies of guavas, since some genotypes of P. cattleyanum, P. friedrichsthalianun and P. guineense were identified as resistant to the galling nematode Meloidogyne enterolobii, which causes a disease with serious impacts on guava culture (Almeida et al, 2009;Miranda et al, 2012;Costa et al, 2012;Bizatti et al, 2016).…”

Section: Introductionmentioning

confidence: 99%