Biological control in the germination of seeds from two species native of the Cerrado region

Abstract

Microorganisms have been efficiently used for the biological control of phytopathogens through the production of antimicrobial substances. However, the objectives of this work were: to study the germination of Butia purpurascens Glassman and Butia archeri Glassman seeds in different substrates, to select and identify the endophytic and rhizospheric bacterial isolates of B. purpurascens and B. archeri, and to perform antibiosis tests based on the isolated microorganisms of these tree species. No difference was found between the cultivation substrates for the percentages of germination, hard seeds, and fungal contamination in the B. purpurascens seeds. The Bacillus subtilis isolated showed the best capacity for suppressing the growth of the two deteriorative fungi tested in B. purpurascens seeds. No difference was found for inhibition of the growth of Aspergillus niger fungus (deteriorative fungus of B. archeri seeds) between the microorganisms with Bacillus sp. and Brevibacillus brevis compared to the control. In the microbiolization of B. purpurascens and B. archeri seeds performed with microbiological solutions produced from the endophytic and rhizospheric strains of Bacillus sp., no differences were observed in the percentages of germination and contamination by fungi. For B. archeri seeds, there was contamination by fungi and bacteria after one day of cultivation, primarily in the regions with lesions caused by the extraction and scarification process.

Identification by molecular techniques of halophilic bacteria producing important enzymes from pristine area in Campeche, Mexico

“…Furthermore, specifically the order Bacillales (50.2% of relative abundance, found in this work) has been shown to have various commercial applications that include cleaning agents in detergents, in starch modification, and other chemicals (Stein, 2005). This order it has been found to have high antifungal activity, playing an important role in the infection cycle of plant pathogens too (Oliveira et al, 2021).…”

Evaluation of the efficacy of different concentrations of nano-capsules containing Talaromyces flavus with two forms of powder and suspension in reducing the incidence of cotton Verticillium wilt

“…Since the issue of marketing and attracting relevant consumers is important in mass production and commercialization of biological agents, (Husen et al, 2007;Alimi et al, 2006;Kaewchai et al, 2009;Pereira et al, 2009;Amatuzzi et al, 2018;Oliveira et al, 2021), the issue of commercialization of the biological agent T. flavus and producing its various bio-formulations, including nanoformulations seems to be necessary. In recent decades, nanotechnology has expanded significantly in various chemical, pharmaceutical, medical and chemical pesticides areas.…”

Eugenol na indução de fitoalexina no feijoeiro (Phaseolus vulgaris L.)

“…Pesquisas, cujo objetivo é a produção de alimentos isentos de resíduos de defensivos agrícolas, têm demonstrado o potencial de métodos naturais no controle de fitopatógenos, como, por exemplo, o controle biológico da podridão radicular do abacateiro com Trichoderma spp. e Pseudomonas fluorescens [1] , o uso de isolado bacteriano Bacillus subtilis na supressão do crescimento de fungos deterioradores nas sementes de Butia purpurascens [2] e a aplicação de extrato de própolis no controle de Erwinia carotovora subsp em batata [3] .…”