Details der Publikation - Direct and cross-pathogenicity of Phytophthora palmivora against cacao, papaya, and peach palm

Direct and cross-pathogenicity of Phytophthora palmivora against cacao, papaya, and peach palm

Abstract Phytophthora palmivora is a plant pathogen that affects cacao, papaya and peach palm, which are often intercropped in Bahia, in the Northeast of Brazil. The objectives of this study were to find answers to the following questions: Is there variability in the aggressiveness of pathogen isolates to their respective hosts? Can isolates derived from one host infect another? A total of 150 P. palmivora isolates derived from cacao (85), papaya (36), and peach palm (29) were inoculated on leaf discs of their respective hosts to study pathogenicity. For cacao, two clones were used. Inoculum was applied to leaf discs of cacao, peach palm, and papaya at a concentration of 3 × $ 10^{5} $ zoospores/mL, and evaluations were performed, respectively, 7, 5, and 4 days later. Twelve, seven, and five isolates taken from cacao, papaya, and peach palm, respectively, were inoculated on leaf discs of the three hosts to determine cross-pathogenicity. The aggressiveness of the isolates against their respective hosts was variable and all 24 isolates caused lesions on the leaf discs of the three hosts. Isolates from one host were observed to infect others as well. Isolates from cacao, papaya, and peach palm were highly aggressive against their own host, although a few isolates from other hosts were among the most aggressive against these three hosts..

Medienart:	E-Artikel

Erscheinungsjahr:	2021
Erschienen:	2021

Enthalten in:	Zur Gesamtaufnahme - volume:46
Enthalten in:	Tropical plant pathology - 46(2021), 6 vom: 08. Sept., Seite 664-673

Sprache:	Englisch

Beteiligte Personen:	Tocafundo, Francis [VerfasserIn] Rodrigues, Giselle de Souza [VerfasserIn] dos Santos, Elisângela [VerfasserIn] de Melo, Clausio Antônio Ferreira [VerfasserIn] Magalhães, Dilze Maria Argolo [VerfasserIn] Pires, José Luís [VerfasserIn] dos Santos, Álvaro Figueredo [VerfasserIn] Luz, Edna Dora Martins Newman [VerfasserIn]

Links:	Volltext [lizenzpflichtig]

Anmerkungen:	© Sociedade Brasileira de Fitopatologia 2021

doi:	10.1007/s40858-021-00464-y

funding:
Förderinstitution / Projekttitel:

PPN (Katalog-ID):	OLC2128449715

Internformat


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520			\|a Abstract Phytophthora palmivora is a plant pathogen that affects cacao, papaya and peach palm, which are often intercropped in Bahia, in the Northeast of Brazil. The objectives of this study were to find answers to the following questions: Is there variability in the aggressiveness of pathogen isolates to their respective hosts? Can isolates derived from one host infect another? A total of 150 P. palmivora isolates derived from cacao (85), papaya (36), and peach palm (29) were inoculated on leaf discs of their respective hosts to study pathogenicity. For cacao, two clones were used. Inoculum was applied to leaf discs of cacao, peach palm, and papaya at a concentration of 3 × $ 10^{5} $ zoospores/mL, and evaluations were performed, respectively, 7, 5, and 4 days later. Twelve, seven, and five isolates taken from cacao, papaya, and peach palm, respectively, were inoculated on leaf discs of the three hosts to determine cross-pathogenicity. The aggressiveness of the isolates against their respective hosts was variable and all 24 isolates caused lesions on the leaf discs of the three hosts. Isolates from one host were observed to infect others as well. Isolates from cacao, papaya, and peach palm were highly aggressive against their own host, although a few isolates from other hosts were among the most aggressive against these three hosts.
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912			\|a GBV_ILN_2064
912			\|a GBV_ILN_2065
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Direct and cross-pathogenicity of Phytophthora palmivora against cacao, papaya, and peach palm

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