Identification and aggressiveness of four isolates of <i>Fusarium oxysporum</i> f.sp. <i>cubense</i> from Latundan banana in Brazil

Araújo, Neilton Antonio Fiusa; Pasqual, Moacir; Pio, Leila Aparecida Salles; Alves, Eduardo; Moura, Nevenka de Matos; Costa, Sarah da Silva

doi:10.1111/jph.12557

Cited by 10 publications

(8 citation statements)

References 27 publications

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“…To the best of our knowledge, this is the first report of wilt on A. negundo caused by F. nirenbergiae in China. The FOSC has more than 150 putative plant host-specific formae speciales (Araújo et al 2017), such as F. oxysporum f. sp. elaeidis, the aetiological agent of Fusarium wilt of oil palm (Flood 2006).…”

Section: Discussionmentioning

confidence: 99%

Wilt of Acer negundo L. caused by Fusarium nirenbergiae in China

Zhao

Zhou

et al. 2019

J. For. Res.

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Boxelder maple (Acer negundo L.) is widely grown as ornamental trees in China. In 2017 in Pizhou, Jiangsu Province, China, the boxelder maple trees suffered from a disease which caused wilting and yellowing leaves, rotted roots, and discolored xylem. The disease broke out from July to August. Seven fungal isolates were obtained from symptomatic tissue and tested for pathogenicity. Isolate An7 was isolated at high frequency from the discolored vascular tissues, which caused the wilt disease on healthy 2-year-old seedlings after inoculation and eventually killed all the seedlings. We conducted molecular analysis for An7, including the partial sequences of the rDNA internal transcribed spacer, calmodulin, RNA polymerase II second largest subunit and the translation elongation factor 1-a and evaluation of the variously sized conidia, chlamydospores and conidiophores and cultural traits. The pathogen was identified as Fusarium nirenbergiae, a member of the Fusarium oxysporum species complex. To our knowledge, this is the first report of F. nirenbergiae causing wilt on A. negundo in China.

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Section: Discussionmentioning

confidence: 99%

Wilt of Acer negundo L. caused by Fusarium nirenbergiae in China

Zhao

Zhou

et al. 2019

J. For. Res.

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“…Disease severity (DS) was determined on a weekly basis for up to 84 days of inoculation (DAI) based on leaf wilting score (Dita et al ). The severity of root and internal corm discolouration was also estimated after 84 DAI based on discolouration scores (Fortunato et al ; Araújo et al ). Area under the disease progress curve (AUDPC) and the percentage of reduction in DS was determined.…”

Section: Methodsmentioning

confidence: 99%

Effect of bioformulations on the biocontrol efficacy, microbial viability and storage stability of a consortium of biocontrol agents against Fusarium wilt of banana

Wong

Saidi

Vadamalai

et al. 2019

J of Applied Microbiology

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Aims This study sought to investigate the effect of bioformulation on the biocontrol efficacy, microbial viability and storage stability of a consortium of Pseudomonas aeruginosa DRB1 and Trichoderma harzianum CBF2 against Foc Tropical Race 4 (Foc‐TR4). Materials and Results Four bioformulations consisting of dry (pesta granules, talc powder and alginate beads) and liquid formulations were evaluated for their ability to control Foc‐TR4, sustain microbial populations after application and maintain microbial stability during storage. All tested bioformulations reduced disease severity (DS) by more than 43·00% with pesta granules producing the highest reduction in DS by 66·67% and the lowest area under the disease progress curve value (468·75) in a glasshouse trial. Microbial populations of DRB1 and CBF2 were abundant in the rhizosphere, rhizoplane and within the roots of bananas after pesta granules application as compared to talc powder, alginate beads and liquid formulations 84 days after inoculation (DAI). The stability of both microbial populations after 180 days of storage at 4°C was the greatest in the pesta granule formulation. Conclusion The pesta granule formulation was a suitable carrier of biological control agents (BCA) without compromising biocontrol efficacy, microbial population and storage stability as compared to other bioformulations used in this study. Significance and Impact of the Study Pesta granules could be utilized to formulate BCA consortia into biofertilizers. This formulation could be further investigated for possible applications under agricultural field settings.

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“…The experimental design was based on the aggressiveness test previously reported [10], it was performed twice. Healthy plants generated as described above were harvested, and their roots were thoroughly washed with distilled water.…”

Section: Pathogenicity Assaysmentioning

confidence: 99%

“…Foc1 isolates have been detected in diverse banana and plantains cultivars in southern Brazil [7], Minas Gerais at the Southeastern Brazil [8], and recently in Puerto Rico [9]. It is worth to mention that a new lineage within Foc was also identified in Goiás, central Brazil, and it is highly virulent in Latundan bananas (AAA) [10]. To our knowledge, there are no reports of TR4 in Latin America, however, further screenings in diseased plants can broaden our knowledge about the fungal biodiversity causing the Panama disease.…”

Section: Introductionmentioning

confidence: 99%

Identification of Novel Potential Causal Agents of Fusarium Wilt of Musa sp. AAB in Southern Mexico

Maldonado-Bonilla¹,

Calderón-Oropeza²,

Villarruel-Ordaz³

et al. 2019

J Plant Pathol Microbiol

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A major threat for bananas and plantains production is the Panama Disease or Fusarium Wilt caused by Fusarium oxysporum f. sp. cubense. In order to characterize the causal agents of Fusarium wilt in Mexico, a sampling was performed in symptomatic plantains growing in fields of Oaxaca, a coastal southern state of Mexico. A phylogenetic analysis based on the sequences of TEF 1-α and IGS revealed that three isolates belonged to the Fusarium oxysporum species complex, while two other isolates were identified as members of the Fusarium fujikuroi species complex. Furthermore, isolates from the same complex shared the same ITS2 sequence. Inoculation using spores of each isolate on the roots of Musa sp. AAB cv. Manzano produced wilting symptoms of varying severity, suggesting that the Fusarium wilt might not be caused only by Fusarium oxysporum f. sp. cubense. PCR-based detection of Secreted in Xylem (SIX) genes showed that each Fusarium isolate harbored a unique combination of genes typically found in banana pathogens, which might cause the disease.

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Identification and aggressiveness of four isolates of Fusarium oxysporum f.sp. cubense from Latundan banana in Brazil

Cited by 10 publications

References 27 publications

Wilt of Acer negundo L. caused by Fusarium nirenbergiae in China

Wilt of Acer negundo L. caused by Fusarium nirenbergiae in China

Effect of bioformulations on the biocontrol efficacy, microbial viability and storage stability of a consortium of biocontrol agents against Fusarium wilt of banana

Identification of Novel Potential Causal Agents of Fusarium Wilt of Musa sp. AAB in Southern Mexico

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