Ação de indutores de resistência em cacaueiro infectados com Ceratocystis cacaofunesta.

Antonio, Gabriel Leonardi; Donato, Roberto de Lima; Iossi, Matheus Rodrigo; Firmino, Ana Carolina

doi:10.1590/0100-5405/181211

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…This study contributes to the chemistry of P. pesaresanum through the isolation and identification of three benzoic acid derivatives (1-3), a dihydrochalcone (4) and a mixture of sterols (5-7), of which 2 to 4 are reported for the first time in the species. Additionally, seven derivatives (8)(9)(10)(11)(12)(13)(14) were synthesized from natural compounds, four of them being reported for the first time (9, 10, 12 and 14). Finally, the preliminary structure-activity study derived from benzoic acid and dihydrochalcones contributes to research focused on the control of phytopathogenic fungi.…”

Section: Discussionmentioning

confidence: 99%

“…Species of the genus Phytophthora cause the disease known as "black ear" [11]. Ceratocystis fimbriata causes the disease known as "machete disease", which affects various vegetative organs and can cause plant death [12]. Additionally, endophytic fungi such as Fusarium solani have been reported as phytopathogens when they negatively affect the plant.…”

Section: Introductionmentioning

confidence: 99%

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Antifungal Activity of Chemical Constituents from Piper pesaresanum C. DC. and Derivatives against Phytopathogen Fungi of Cocoa

et al. 2021

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In this study, the antifungal potential of chemical constituents from Piper pesaresanum and some synthesized derivatives was determined against three phytopathogenic fungi associated with the cocoa crop. The methodology included the phytochemical study on the aerial part of P. pesaresanum, the synthesis of some derivatives and the evaluation of the antifungal activity against the fungi Moniliophthora roreri, Fusarium solani and Phytophthora sp. The chemical study allowed the isolation of three benzoic acid derivatives (1–3), one dihydrochalcone (4) and a mixture of sterols (5–7). Seven derivatives (8–14) were synthesized from the main constituents, of which compounds 9, 10, 12 and 14 are reported for the first time. Benzoic acid derivatives showed strong antifungal activity against M. roreri, of which 11 (3.0 ± 0.8 µM) was the most active compound with an IC50 lower compared with positive control Mancozeb® (4.9 ± 0.4 µM). Dihydrochalcones and acid derivatives were active against F. solani and Phytophthora sp., of which 3 (32.5 ± 3.3 µM) and 4 (26.7 ± 5.3 µM) were the most active compounds, respectively. The preliminary structure–activity relationship allowed us to establish that prenylated chains and the carboxyl group are important in the antifungal activity of benzoic acid derivatives. Likewise, a positive influence of the carbonyl group on the antifungal activity for dihydrochalcones was deduced.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antifungal Activity of Chemical Constituents from Piper pesaresanum C. DC. and Derivatives against Phytopathogen Fungi of Cocoa

et al. 2021

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Induction of systemic resistance in Theobroma cacao L. for the management of “witches’ broom” caused by Moniliophthora perniciosa

Morato

González

Cardona

2023

Trop. plant pathol.

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The pathogen Moliniophthora perniciosa can cause losses in the cocoa crop of more than 90% when integrated disease management is not carried out in the crop. In the present study, the effect of sucrose as a resistance inducer in cocoa trees (Theobroma cacao L.), was evaluated for the management of the “witches’ broom” disease caused by Moniliophthora perniciosa. The experiment was developed in the municipality of Chaparral, Tolima, Colombia (854 m.a.s.l.). The treatments corresponded to 0.9 M sucrose: injected (T1), foliar spray (T2) and without sucrose (T3). A completely randomized block design with three treatments was established. The results showed that the incidence and severity of the disease in the trees treated with sucrose were lower. The polyphenol oxidase enzyme presented its highest activity in T3, while peroxidase and superoxide dismutase in T2. It was observed that sucrose as an inducer, can alter metabolic pathways involved in the defense mechanisms of cocoa trees, reducing the incidence and severity, thus establishing an alternative for the management of “witches' broom” disease in producing countries.

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Ação de indutores de resistência em cacaueiro infectados com Ceratocystis cacaofunesta.

Cited by 2 publications

References 2 publications

Antifungal Activity of Chemical Constituents from Piper pesaresanum C. DC. and Derivatives against Phytopathogen Fungi of Cocoa

Antifungal Activity of Chemical Constituents from Piper pesaresanum C. DC. and Derivatives against Phytopathogen Fungi of Cocoa

Induction of systemic resistance in Theobroma cacao L. for the management of “witches’ broom” caused by Moniliophthora perniciosa

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