Article fusarium oxysporum f. Sp. cannabis isolated from cannabis sativa l.: In vitro and in planta biocontrol by a plant growth promoting-bacteria consortium

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Abstract

Industrial hemp (Cannabis sativa L.) is a multipurpose plant used in several fields. Several phytopathogens attack hemp crops. Fusarium oxysporum is a common fungal pathogen that causes wilt disease in nurseries and in field cultivation and causes high losses. In the present study, a path-ogenic strain belonging to F. oxysporum f. sp. cannabis was isolated from a plant showing Fusarium wilt. After isolation, identification was conducted based on morphological and molecular charac-terizations and pathogenicity tests. Selected plant growth-promoting bacteria with interesting bio-control properties—Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedi-cae and Burkholderia ambifaria—were tested against this pathogen. In vitro antagonistic activity was determined by the dual culture method. Effective strains (in vitro inhibition > of 50%) G. diazotrophi-cus, H. seropedicae and B. ambifaria were combined in a consortium and screened for in planta antagonistic activity in pre-emergence (before germination) and post-emergence (after germination). The consortium counteracted Fusarium infection both in pre-emergence and post-emergence. Our pre-liminary results show that the selected consortium could be further investigated as an effective bi-ocontrol agent for the management of this pathogen.

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Pellegrini, M., Ercole, C., Gianchino, C., Bernardi, M., Pace, L., & Del Gallo, M. (2021). Article fusarium oxysporum f. Sp. cannabis isolated from cannabis sativa l.: In vitro and in planta biocontrol by a plant growth promoting-bacteria consortium. Plants, 10(11). https://doi.org/10.3390/plants10112436

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