Abstract
Abstract: In June 2022, anthracnose was detected on the leaves of Annona muricata L. (soursop) in Ibirapitanga, Bahia, Brazil. To identify the pathogens, diseased leaves were surface sterilized and cultured on potato dextrose agar, resulting in the selection of two isolates, IBIRA-P5R2 and IBIRA-P2F1R2, which were used for further analysis. IBIRA-P5R2 exhibited gray to white mycelium with dark conidiomata, cylindrical conidia, and dark appressoria. In contrast, IBIRA-P2F1R2 exhibited dense, pale gray mycelium with distinct conidial and ascospore characteristics. Genetic analysis involved sequencing three regions: Internal Transcribed Spacer (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and actin (ACT), with results deposited in GenBank. BLAST analysis revealed that IBIRA-P5R2’s sequences were 95.45% similar to Colletotrichum karstii, while IBIRA-P2F1R2’s sequences were 99.06% identical to . Colletotrichum fructicolaPathogenicity tests confirmed that both isolates caused anthracnose symptoms in soursop seedlings, with dark spots developing on leaves after three days. The pathogens were reisolated from infected leaves, confirming the same cultural and morphological traits as the original isolates. This study marks the firstrecorded occurrence of C. karstii and C. fructicola causing anthracnose on soursop in Bahia, Brazil. The findings aim to inform soursop farmers about this emerging disease, highlighting the need for tailored integrated management strategies to address different plant pathogens effectively.
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Claims 9
Claim · model-written summary
Anthracnose was detected on soursop leaves in June 2022 in Ibirapitanga.
- Taxon
- Annona muricata L.
Annona muricatae0 - Organ / stage
- leavese0
- Outcome
- anthracnosee0
- Qualifier
- June 2022e0
- Setting
- Ibirapitanga, Bahia, Brazile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In June 2022, anthracnose was detected on the leaves of Annona muricata L. (soursop) in Ibirapitanga, Bahia, Brazil”
Claim · model-written summary
IBIRA-P5R2 showed gray to white mycelium, dark conidiomata and cylindrical conidia with dark appressoria.
Verbatim
e0“IBIRA-P5R2 exhibited gray to white mycelium with dark conidiomata, cylindrical conidia, and dark appressoria”
t0“Colletotrichum karstii”
Claim · model-written summary
IBIRA-P2F1R2 showed dense pale gray mycelium and distinct conidial and ascospore characteristics.
- Taxon
- C. fructicola
_Figure_8.jpg?width=60)
Colletotrichum fructicolat0 - Material
- IBIRA-P2F1R2e0
- Outcome
- dense, pale gray mycelium with distinct conidial and ascospore characteristicse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_8.jpg?width=500)
Verbatim
e0“IBIRA-P2F1R2 exhibited dense, pale gray mycelium with distinct conidial and ascospore characteristics”
t0“C. fructicola”
Claim · model-written summary
IBIRA-P5R2 sequences were 95.45% similar to Colletotrichum karstii.
Not reportedDirection
Verbatim
e0“IBIRA-P5R2’s sequences were 95.45% similar to Colletotrichum karstii”
Claim · model-written summary
IBIRA-P2F1R2 sequences were 99.06% identical to Colletotrichum fructicola.
- Taxon
- Colletotrichum fructicolaColletotrichum fructicolae0
- Material
- IBIRA-P2F1R2e0
- Outcome
- sequencese0
- Value
- 99.06%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IBIRA-P2F1R2’s sequences were 99.06% identical to . Colletotrichum fructicolaPathogenicity”
Claim · model-written summary
Both isolates caused anthracnose with leaf dark spots after three days in soursop seedlings.
- Taxon
- soursopAnnona muricatae0
- Organ / stage
- seedlingse0
- Treatment
- both isolatese0
- Interactor
- Colletotrichum karstiit0pathogen
- Second interactor
- C. fructicolaColletotrichum fructicolat0pathogen
- Outcome
- anthracnose symptomse0
- Qualifier
- with dark spots developing on leaves after three dayse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity tests confirmed that both isolates caused anthracnose symptoms in soursop seedlings, with dark spots developing on leaves after three days”
t0“Colletotrichum karstii and C. fructicola”
Claim · model-written summary
Reisolated pathogens retained the original isolates' cultural and morphological traits.
Verbatim
e0“The pathogens were reisolated from infected leaves, confirming the same cultural and morphological traits as the original isolates”
t0“Colletotrichum karstii and C. fructicola”
Claim · model-written summary
This is the first recorded occurrence of the two pathogens causing soursop anthracnose in Bahia.
- Taxon
- soursopAnnona muricatae0
- Interactor
- C. karstiie0pathogen
- Second interactor
- C. fructicolaColletotrichum fructicolae0pathogen
- Outcome
- firstrecorded occurrencee0
- Setting
- Bahia, Brazile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study marks the firstrecorded occurrence of C. karstii and C. fructicola causing anthracnose on soursop in Bahia, Brazil”
Claim · model-written summary
The authors highlight the need for tailored integrated disease management.
- Taxon
- soursopAnnona muricatae0
- Outcome
- tailored integrated management strategiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The findings aim to inform soursop farmers about this emerging disease, highlighting the need for tailored integrated management strategies to address different plant pathogens effectively”