Presence of Phytophthora cinnamomi Rands. in avocado orchards in Azapa and Codpa valleys, Chile

Sepúlveda-Chavera, Germán; Salvatierra‐Martínez, Ricardo; Bilbao-Apata, Cristián; Sepúlveda-Ramírez, Paulina; Allende-Castro, Marjorie; Alache-González, Jorge

doi:10.4067/s0718-34292013000200006

Cited by 4 publications

(4 citation statements)

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“…21 Chalcone derivatives with -OH and -OCH 3 in the rings A and B have demonstrated potential antileishmanial and anti-trypanosomal activities by acting on a number of molecular targets. 23 Fungal plant pathogens such as Botrytis cinerea (B. cinerea), 24 Gibberella fujikuroi (G. fujikuroi) 25 and Phytophthora cinnamomi (P. cinnamomi) 26,27 attack a wide range of agriculturally and ornamentally important plants 28 and significantly affect the economy of developing countries causing large economic losses in agriculture. 29 Numerous fungicides such as carboxin, captan, thiram, tebuconazole and metalaxyl have been used to control fungal phytopathogens, but all of them possess secondary effects in other non-target microorganisms and living beings.…”

Section: Introductionmentioning

confidence: 99%

“…Percentage of growth inhibition of phytopathogenic fungiCompoundMycelial growth inhibition of fungal plant pathogens / % 26. 66.67 ± 1.26 68.84 ± 1.26 56.65 ± 0.97 66.28 ± 0.63 55.96 ± 0.0 77.11 ± 1.45 83.28 ± 1.21 85.30 ± 2.35 12 64.13 ± 1.09 67.75 ± 1.66 73.55 ± 0.63 51.83 ± 1.95 69.27 ± 0.79 50.46 ± 0.0 79.54 ± 1.37 81.09 ± 0.65 83.29 ± 0.61 13 61.23 ± 0.63 64.13 ± 1.09 69.20 ± 2.26 60.09 ± 1.95 67.66 ± 0.97 71.56 ± 0.79 78.36 ± 0.69 81.39 ± 2.91 83.89 ± 3.23 .79 72.02 ± 0.79 76.15 ± 0.79 85.02 ± 0.57 86.97 ± 0.54 88.20 ± 0.52 16 65.58 ± 1.66 74.64 ± 0.63 81.16 ± 1.26 60.09 ± 1.95 53.26 ± 0.07 73.39 ± 1.59 77.11 ± 1.45 82.21 ± 0.63 84.34 ± 0.59 17 63.77 ± 1.26 73.55 ± 0.63 75.36 ± 1.26 57.34 ± 1.95 74.77 ± 0.79 74.77 ± 5.55 89.06 ± 0.98 91.38 ± 0.54 82.44 ± 3.65…”

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confidence: 99%

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Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones

Vásquez-Martínez¹,

Osorio²,

D³

et al. 2018

J. Braz. Chem. Soc.

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It was synthesized nine polyoxygenated chalcones with a potential and safe use as antioxidant, antimicrobial and anti-inflammatory therapies. Chalcones obtained by Claisen-Schmidt condensation were studied as antioxidant, inhibitors of human 5-lipoxygenase, antifungal, antibacterial and antibiotic resistance modifiers. Two chalcones with catecholic moieties were able to strongly decrease the minimum inhibitory concentration (MIC) of methicillin against methicillin-resistant Staphylococcus aureus, increase the antiradical activity and significantly inhibit the human 5-lipoxygenase. Only one of these chalcones was active synergistically with methicillin. Chalcones with methoxyl substituents at different positions displayed the best activities against Cryptococcus neoformans. Only one chalcone showed good activity against the plant pathogenic bacteria Pseudomonas syringae whose half maximal inhibitory concentration (IC 50) value (2.5 µg mL-1) was similar to that observed with the antibiotic streptomycin (2.9 µg mL-1). These simple chalcones have safe potential uses in antioxidant, antimicrobial and anti-inflammatory therapies.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones

Vásquez-Martínez¹,

Osorio²,

D³

et al. 2018

J. Braz. Chem. Soc.

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“…Gibberella fujikuroi is a filamentous fungus that causes the disease called "bakanae" in rice and other grasses; it is characterized by excessive growth of the plant and a reduction in the size and quality of the fruit, caused by the excessive production of the plant growth hormone, Gibberellin GA3 8 . Phytophthora cinnamomi is a phytopathogenic fungus that causes the disease "avocado root rot" and is the main phytosanitary problem of this fruit in Chile 9 . Excess moisture in the soil and root wounds create favorable conditions for this fungus 10 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Anti-Phytopathogenic and DPPH Radical Scavenging Activities of C-Prenylated Acetophenones and Benzaldehydes

Osorio

Quiroz

Carvajal

et al. 2016

J. Chil. Chem. Soc.

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The syntheses of six prenylated acetophenone and benzaldehyde derivatives and their anti-phytopathogenic and antioxidant activities are reported. These compounds were obtained by electrophilic aromatic substitution (S E Ar) of the corresponding arenes and 3-methyl-2-buten-1-ol using ZnCl 2 as a Lewis acid catalyst in ethyl acetate. Reasonable to good yields were obtained based on unrecovered aromatic starting material (45-73%). All the synthesized compounds were evaluated against phytopathogenic gram-negative bacteria Agrobacterium tumefaciens, Pseudomonas syringae and Erwinia carotovora and plant fungal pathogens Botrytis cinerea, Phytophthora cinnamomi and Gibberella fujikuroi. The antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity assay and expressed as half maximal inhibitory concentration (IC 50 ) values in µM concentrations. The antioxidant activity went from 27.20 µM to >100 µM. Compound 11 showed statistically significant inhibition of the growth of Botrytis cinerea, and compounds 13 and 15 showed statistically significant inhibition of the growth of Phytophthora cinnamomi, with respect to negative control fungal growth. All six compounds showed bacteriostatic effects against gram-negative plant pathogenic bacteria with IC 50 values between 250 and <3.9 µM.

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“…As hifas apresentaram-se não septadas havendo a formação abundante de dilatações nas hifas e também a formação de clamidósporos globosos. Estas características correspondem às descritas por vários autores para a espécie P. cinnamomi Rands (8,11,12,23,26) e corroboram com as características definidas por Waterhouse (27) para P. cinnamomi…”

Section: Discussionunclassified

Morte de árvores de plátano causada por Phytophthora cinnamomi

Santos

2019

Summa phytopathol.

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RESUMO Em 2016, em isolamentos provenientes de amostras de árvores de plátano (Platanus acerifolia) na região de Curitiba, estado do Paraná (Brasil), foram obtidos quatro isolados do oomiceto Phytophthora. Os isolados obtidos foram caracterizados a partir de análises morfológica e molecular visando sua identificação específica. Avaliou-se o crescimento micelial dos isolados em oito temperaturas, formação e dimensões de estruturas sexuadas e assexuadas e foi realizada a análise molecular com base na região ITS do DNA. Realizou-se, também, teste de patogenicidade em mudas de araucária, plátano e frutos de abacate. Os isolados apresentaram crescimento ótimo na faixa de 20 - 28°C e não foi verificado crescimento micelial a 8 e 36°C. As colônias dos quatro isolados apresentaram-se cotonosas com micélio pouco denso. Os quatro isolados produziram esporângios persistentes, predominantemente elipsoides, sem papilas com média de 32,5 x 24,2 µm. Observou-se a formação de clamidósporos globosos e terminais com diâmetro médio de 38,4 µm. Todos os isolados apresentaram-se heterotálicos do tipo de compatibilidade A2, com oósporos de anterídio anfígeno medindo em média 30 µm. A análise molecular realizada demonstrou 99% de similaridade de um dos isolados de plátano com as sequências disponíveis no GenBank e Phytophthora-ID para Phytophthora cinnamomi. Com base nestes caracteres os isolados foram identificados como Phytophthora cinnamomi Rands. Este é o primeiro relato desta espécie causando morte de árvores de plátano no Brasil.

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Presence of Phytophthora cinnamomi Rands. in avocado orchards in Azapa and Codpa valleys, Chile

Cited by 4 publications

References 3 publications

Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones

Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones

Synthesis, Anti-Phytopathogenic and DPPH Radical Scavenging Activities of C-Prenylated Acetophenones and Benzaldehydes

Morte de árvores de plátano causada por Phytophthora cinnamomi

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