Produção de compostos fenólicos durante a infecção ectomicorrízica por dois isolados de Pisolithus tinctorius em Eucalyptus urophylla in vitro

Baptista, Mírian Josefina; Glória, Beatriz Appezzato da; Pascholati, Sérgio Florentino; Krügner, Tasso Léo

doi:10.1590/s0100-84041999000500013

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…However, roots in contact with the Pinus isolates frequently had a brown color, indicating an increased synthesis of phenolics due to isolate incompatibility (Baptista et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Compatibility and ectomycorrhiza formation among Pisolithus Isolates and Eucalyptus spp

Pereira¹,

Costa

Borges

et al. 2005

Rev. Bras. Ciênc. Solo

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SUMMARYTwenty-nine isolates of the ectomycorrhiza fungus Pisolithus sp. from different geographical and host origins were tested for their ability to form ectomycorrhizae on Eucalyptus grandis and E. urophylla seedlings under greenhouse conditions. The ectomycorrhiza-forming capacity of isolates varied greatly from one eucalypt species to the other. All isolates from Eucalyptus, nine from Pinus spp. and two isolates from unknown hosts formed mycorrhizae with E. grandis and E. urophylla. Root colonization rates varied from 0 to 5.2 % for all Pinus isolates and those from unknown hosts. Colonization rates for these isolates were lower than those observed for Eucalyptus isolates (0.8 to 89.4 %). Three isolates from unknown hosts formed mycorrhizae with neither Eucalyptus species. The main characteristic for distinguishing Pinus from Eucalyptus isolates was mantle color. These data corroborate previous results obtained in our laboratory indicating that the isolates tested represent at least two distinct different species within the genus Pisolithus. Index terms: ectomycorrhiza colonization, Eucalyptus grandis, Eucalyptusurophylla, morphological characterization, sclerotia. RESUMO: COMPATIBILIDADE E FORMAÇÃO DE ECTOMICORRIZAS ENTRE ISOLADOS DE Pisolithus E Eucalyptus SPP

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“…However, roots in contact with the Pinus isolates frequently had a brown color, indicating an increased synthesis of phenolics due to isolate incompatibility (Baptista et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Compatibility and ectomycorrhiza formation among Pisolithus Isolates and Eucalyptus spp

Pereira¹,

Costa

Borges

et al. 2005

Rev. Bras. Ciênc. Solo

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“…Esse comportamento resulta do fato de que muitas espécies, ou mesmo isolados de fECM, apresentam seletividade em relação a determinadas espécies vegetais (CARRERA-NIEVA e LÓPEZ-RÍOS, 2004;SMITH e READ, 2008), permitindo a dependência do fungo na presença de sinais bioquímicos específicos, produzidos pela planta hospedeira (MOREIRA e SIQUEIRA, 2006). Essa relação ocorre em associações compatíveis (SOUZA et al, 2006), onde o sistema radicular das plantas sintetiza e disponibiliza metabólitos secundários preferenciais do fungo que atuam como sinais bioquímicos favoráveis ao quimiotropismo (BAPTISTA et al, 1999;FEUGEY et al, 1999). Assim, a utilização dos metabólitos produzidos por plantas simbiontes, como o eucalipto, pode ser uma alternativa tecnológica para estimular o estabelecimento dessa associação nas espécies florestais nativas do Brasil.…”

Section: Introductionunclassified

Óleo essencial de <i>Eucalyptus grandis</i> Hill ex Maiden no estímulo à micorrização de mudas de sibipiruna (<i>Caesalpinia peltophoroides </i>Benth.)

Steffen¹,

Antoniolli²,

Steffen³

et al. 2012

Ciênc. Florest.

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RESUMOOs metabólitos secundários extraídos de espécies florestais formadoras de ectomicorrizas podem estimular a simbiose entre fungos ectomicorrízicos e espécies florestais nativas do Rio Grande do Sul. O objetivo deste trabalho foi determinar o efeito do óleo essencial de eucalipto na formação de associação ectomicorrízica e no crescimento de mudas de sibipiruna, em condições de casa de vegetação. Plântulas de sibipiruna foram submetidas a quatro tratamentos constituídos pela presença e ausência do inóculo ectomicorrízico Pisolithus microcarpus (Cooke & Massee) e aplicação ou não do óleo essencial de eucalipto. O óleo essencial foi solubilizado e aplicado com pulverizador manual nos períodos de 0, 7 e 14 dias a contar da data de transplante das plântulas. Utilizou-se o delineamento inteiramente casualizado com sete repetições. Decorridos 90 dias de crescimento, as mudas foram coletadas e avaliou-se altura, diâmetro do colo, comprimento de raízes, massa seca da parte aérea e porcentagem de colonização micorrízica. A aplicação do óleo essencial de eucalipto favoreceu a ocorrência de associação ectomicorrízica, com Pisolithus microcarpus em mudas de sibipiruna, proporcionando aumento significativo no desenvolvimento da parte aérea das mudas. Palavras-chave: plantas nativas; Pisolithus microcarpus; metabólitos secundários. ABSTRACTThe secondary metabolites extracted from forest species forming ectomycorrhizal could stimulate the symbiosis between ectomycorrhizal fungi and natives forest species of Rio Grande do Sul state. The aim of this work was to evaluate ectomycorrhizal association and the seedlings growth of inoculated and non-inoculated Sibipiruna with Pisolithus microcarpus (Cooke & Massee) ectomycorrhizal fungus and submitted and not submitted to the application of the essential oil of Eucalyptus grandis, in greenhouse conditions. The essential oil was solubilized and applied with manual spray during periods of 0, 7 and 14 days from the date of seedlings transplanting. A randomized design with seven repetitions was used. After 90 days of plant growth, it was evaluated the seedling colonization degree, the height, the stem diameter, the root length and the dry mass of shoots. The eucalyptus essential oil stimulates the occurrence of ectomycorrhizal on Sibipiruna seedlings, thus providing high seedling development when inoculated with Pisolithus microcarpus.

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“…37 Baptista and coworkers have inoculated Eucalyptus urophylla plants in vitro with two Pisolithus tinctorius ectomycorrhizal isolates and they found that the roots had a significantly higher chlorogenic acid level 96 hours after inoculation as compared to a control. 38 On the other hand, the UV spectrum of compound 2 displayed absorption bands at 197, 255, and 354 nm, typical of flavonoids. The 1 H and 13 C NMR spectra exhibited the characteristic signals of a flavonoid skeleton, whose ring B coupling pattern suggested a quercetin core.…”

Section: Resultsmentioning

confidence: 99%

Metabolic response induced by endophytic fungi and bacteria in H. marrubioides Epling in vitro microplants

Vitorino¹,

Silva²,

Lima³

et al. 2013

Quím. Nova

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Hyptis marrubioides Epling is a native plant from Brazilian Cerrado. In this paper, the response of in vitro microplants of this species to inoculation with bacterial and fungal endophytic isolates is evaluated. HPLC-DAD analysis showed the presence of 3,4-O-(Z)-dicaffeoylquinic acid and quercetin-7-O-glucoside as the main components. GC/MS analysis demonstrated that the sesquiterpenes t-cadinol and caryophyllene oxide were only produced in microplants inoculated with endophytic bacteria, while methyl hexadecanoate, methyl heptadecanoate and methyl (Z,Z,Z) 9,12,15-octadecatrienoate and the triterpene methyl 3β-hydroxyurs-12-en-28-oate were overexpressed only when the microplant was treated with endophytic fungi.

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Produção de compostos fenólicos durante a infecção ectomicorrízica por dois isolados de Pisolithus tinctorius em Eucalyptus urophylla in vitro

Cited by 7 publications

References 12 publications

Compatibility and ectomycorrhiza formation among Pisolithus Isolates and Eucalyptus spp

Compatibility and ectomycorrhiza formation among Pisolithus Isolates and Eucalyptus spp

Óleo essencial de <i>Eucalyptus grandis</i> Hill ex Maiden no estímulo à micorrização de mudas de sibipiruna (<i>Caesalpinia peltophoroides </i>Benth.)

Metabolic response induced by endophytic fungi and bacteria in H. marrubioides Epling in vitro microplants

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