Abstract
Sideroxylon obtusifolium (Roem. & Schul.) Penn. is a native species from Caatinga biome, but due to disorderly exploitation for phytoteraphy industry, it is in danger of extinction. Recent researches report that the diversity of vegetal species in Brazilian semiarid regions, when meticulously assessed through methods that focus on properties of molecules from different plant structures, may present a high potential for the discovery and development of new antifungal substances. The aim of this work was to evaluate the effects of S. obtusifolium seeds treatment with Caesalpinia ferrea extract on the control of Colletotrichum sp. In each treatment, 100 seeds were inoculated with the pathogen through immersion in a suspension of Colletotrichum sp. conidia, and then subjected to the following treatments: Seeds without treatment and not inoculated (T1), seeds infected with Colletotrichum sp. (T2), infected seeds treated with captan fungicide (T3) and infected seeds treated with C. ferrea extract (T4). C. ferrea extract provided a higher protection to S. obtusifolium seeds and seedlings against Colletotrichum sp., indicating that it is a viable and sustainable biotechnological resource against pathogens and a promising molecule for the development of new antifungal substances. Key words: Antifungal activity, native species, alternative control.
Highlights
Sideroxylon obtusifolium (Roem. & Schult.) Penn is a native forestry species from Caatinga biome (Silva and Dantas, 2013)
100 seeds were inoculated with the pathogen through immersion in a suspension of Colletotrichum sp. conidia, and subjected to the following treatments: Seeds without treatment and not inoculated (T1), seeds infected with Colletotrichum sp. (T2), infected seeds treated with captan fungicide (T3) and infected seeds treated with C. ferrea extract (T4)
A wide range of fungi genera was present in the S. obtusifolium seeds microbiota, which included Aspergillus niger, Aspergillus flavus, Aspergillus sp., Botrytis sp., Colletotrichum sp., Chaetonium sp., Cladosporium sp., Curvulária sp., Fusarium sp., Helminthosporium sp., Nigrospora sp. and Penicillium sp
Summary
Sideroxylon obtusifolium (Roem. & Schult.) Penn is a native forestry species from Caatinga biome (Silva and Dantas, 2013). & Schult.) Penn is a native forestry species from Caatinga biome (Silva and Dantas, 2013). Sapotiaba or coronilha (Silva et al, 2012) and it is exploited in popular medicine and for industrial production of phytotherapeutic drugs (Gomes et al, 2010). This way, the development of forest recovery programs through the production of seedlings from high quality seeds and with genetic variance is necessary (Beltrão et al, 2008; Vechiato and Parisi, 2013). The sanitary and physiological quality of seeds is highly important, as it will determine the development of healthy seedlings in nurseries (Mondego et al, 2014)
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