Original research article
Use of Actinobacteria Streptomyces griseocarneus for the Control of Fusarium solani Fungus in Passion Fruit Crops
2024, 89 (2) p. 137-144
Antonio Marcos Chimello, Marcos Antônio SOARES, Sabrina Cassaro, Maria do Socorro Bezerra de ARAÚJO, Thiago Alexandre Santana GILIO, Kelly Lana ARAÚJO, Leonarda Grillo Neves
Abstract
In passion fruit crops, species of the Fusarium solani fungal complex acts as causal agents of collar rot. The symptoms of this disease are characterized by sudden wilting, collapse, and plant death at any stage of development. One of the possible measures to reduce the environmental risk of intensive cultivation is the use of biological controls, which can be found in the form of endophytic microorganisms. In view of this, the present study investigates the use of the endophytic actinobacterium Streptomyces griseocarneus, isolate R132, to promote in vitro and in vivo biological control of F. solani isolates in passion fruit seedlings. Two experiments were conducted: 1) The antibiosis assay in paired culture was used to quantify the antagonism between the actinobacterium S. griseocarneus R132 and eight isolates of the Fusarium solani species complex. 2) The ability of S. griseocarneus, isolate R132, to control seven isolates of F. solani was tested. In the present study, the in vitro antifungal potential of S. griseocarneus R132 was observed against all F. solani isolates. In the biological control evaluation, the actinobacterium significantly reduced the disease damage compared to untreated plants, suggesting that this bacterium is a potential biological control agent.
Keywords
Passiflora edulis Sims, endophytic bacteria, biological control, collar rot, bio-control
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