NDLI: Cultivable Bacteria Populations Associated with Leaves of Banana and Plantain Plants and Their Antagonistic Activity Against Mycosphaerella fijiensis

Content Provider	Springer Nature Link
Author	Ceballos, Isabel Mosquera, Sandra Angulo, Mónica Mira, John J. Argel, Luz Edith Uribe Velez, Daniel Romero Tabarez, Magally Orduz Peralta, Sergio Villegas, Valeska
Copyright Year	2012
Abstract	Mycosphaerella fijiensis is the etiological agent of Black Sigatoka, a fungal disease that affects production of banana and plantain crops in tropical regions. The sizes of cultivable epiphytic and endophytic bacterial populations, aerobic endospore forming bacteria (AEFB), and antagonist bacteria against M. fijiensis isolated from three Musa spp. cultivars from Urabá (Colombia) were studied, in order to find a suitable screening strategy to isolate antagonistic bacteria. Most of the variability found in the epiphytic and endophytic bacterial community sizes among fruit trees was explained by the cultivar differences. We found population sizes ranging from 1.25 × 103 to 9.64 × 105 CFU/g of fresh leaf and found that 44 % of total cultivable bacteria belong to the AEFB group. We isolated 648 AEFB from three different cultivars and assessed their antagonistic activity against M. fijiensis using the cell-free supernatant obtained from bacterial liquid cultures in three different in vitro assays. Five percent of those bacteria showed higher percent inhibition than the positive control Bacillus subtilis UA321 has (percent inhibition = 84 ± 5) in the screening phase. Therefore, they were selected as antagonistic bacteria against the pathogen. The strains with the highest percentage of antagonism were found in older leaves for the three cultivars, given support to recommend this group of leaves for future samplings. Some of these isolated bacteria affected the mycelium and ascospores morphology of the fungus. They also presented in vitro characteristics related to a successful colonization of the phylloplane such as indolic compounds, surfactant production, and biofilm formation, which makes them possible, potential candidates as biological control agents.
Starting Page	641
Ending Page	653
Page Count	13
File Format	PDF
ISSN	00953628
Journal	Microbial Ecology
Volume Number	64
Issue Number	3
e-ISSN	1432184X
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-05-05
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Ecology Geoecology/Natural Processes Nature Conservation Microbial Ecology Microbiology
Content Type	Text
Resource Type	Article
Subject	Soil Science Ecology Ecology, Evolution, Behavior and Systematics

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