Bacillus cabrialesii: Five Years of Research on a Novel Species of Biological Control and Plant Growth-Promoting Bacteria

Abstract

Bacillus cabrialesii is a novel bacterial species isolated from wheat (Triticum turgidum L. subsp. durum) plants in the Yaqui Valley, Mexico, by our research team. Over years of research studying this strain at the cutting-edge level, it has shown different mechanisms of action. B. cabrialesii is strongly reported as a plant-growth-promoting bacterium and a biological control agent on wheat crops. Knowing this, B. cabrialesii has been brought from lab to field as part of a bacterial consortium, not to mention that there are ongoing investigations into formulating a cost-effective bioinoculant to increase the yield and/or quality of wheat. Moreover, studies of this novel species as a biocontrol agent in other crops (pepper, tomato, cucumber, and potato) are being carried out, with preliminary results that make B. cabrialesii a promising biological control agent, inhibiting the growth of phytopathogens. However, research into this bacterium has not only been reported in our country; there are many studies around the world in which promising native Bacillus strains end up being identified as B. cabrialesii, which reaffirms the fact that this bacterial species can promote plant growth and combat phytopathogens, showing great agrobiotechnological potential.

Enhancing the Mechanical Properties and Water Permeability of Pervious Planting Concrete: A Study on Additives and Plant Growth

“…The planting properties of PPC can be improved by other means [20]. Bacillus is a kind of bacteria that can produce spores.…”

The Contribution of Hormonal Changes to the Protective Effect of Endophytic Bacterium Bacillus subtilis on Two Wheat Genotypes with Contrasting Drought Sensitivities under Osmotic Stress

“…Our results showed that the DT wheat variety is more resistant to drought than DS variety: drought decreased the length of seedlings, biomass, and leaf Chl content of DT variety significantly less than DS variety (Table 1). The ability of PGPB to mitigate drought-caused damages in various plants, including wheat, are well documented [21,23,28,29,[63][64][65]. However, the knowledge about the responses of drought-tolerant and susceptible wheat genotypes upon endophytic PGPB treatment is still limited.…”

Biological Control Mechanisms of Bacillus cabrialesii subsp. tritici TSO2T against Fusarium languescens, the Causal Agent of Wilt in Jalapeño Peppers

“…After testing the biocontrol of several Bacillus strains against F. languescens CE2, B. cabrialesii subsp. tritici TSO2 T was selected as BCA for additional in vitro assays, due to its previously reported potential as a biocontrol bacterium and its swarming motility [24,28,30]. Thus, the radial growth of the fungal colonies was recorded every 24 h for ten days (Figure 6).…”

“…As an example of disease management, B. thuringiensis is a soil bacterium that produces spores, which contain crystals that possess strong and targeted insect-killing capabilities [23]. Likewise, strains of B. cabrialesii, a bacterial species recently discovered which is widely reported as a BCA and plant growth promoter [24]. In this sense, the genus Bacillus inhibits the proliferation of phytopathogens through the synthesis of growth-suppression molecules, such as cell wall-destructive enzymes, antibiotics, lipopeptide biosurfactants, or by triggering defense signals in plants [25][26][27].…”