More than just an insect killer: The non-insecticidal activities of Bacillus thuringiensis with biotechnological potential

Oliveira-Santos, Naiane; Pimentel Rodrigues dos Santos, Lorena Brito; Fernandes, Jacquelline Viana; Cruz-Magalhães, Valter; Loguercio, Leandro Lopes

doi:10.1016/j.toxicon.2023.107261

Cited by 2 publications

(2 citation statements)

References 82 publications

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“…The eating habits of A. argillacea were observed, but with variations in temperature conditions. The first explanation provided by the data was that the proportion of larvae on Bt plants was consistently lower than that of non-Bt plants, regardless of the temperature and duration of the cultivars' exposure [28]. First, this argument effectively illustrates the effectiveness and insecticidal capacity of Bt plants.…”

Section: Feeding Habit Of Pest's In Response To Change In Temperaturementioning

confidence: 90%

The Effectiveness and Performance of BT Cotton's Insecticidal Properties under Various Abiotic Stresses: A Review

Shahid,

Aziz,

Fatima

et al. 2023

AJRAF

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Over the past two decades, biotechnology has yielded Bt cotton, a huge success in the field of agriculture. In a number of countries, commercial Bt crop production has proven successful. The global food scarcity crisis has been alleviated by transgenic Bt crops, which have improved agricultural productivity. The Bt cotton crop displays variable levels of insect resistance to several environmental abiotic circumstances, including high temperatures, salt in the soil, water logging and scarcity, inadequate nitrogen supply, and humidity. It has been demonstrated that these components lessen the transgenic crop's endotoxin protein level, which in turn reduces the insecticidal efficacy of the crop. In unfavourable climatic conditions, plants have altered nitrogen metabolism and pain in their physiological systems. This article has discussed some of the primary stresses that Bt cotton encounters as well as the underlying mechanisms that explain its variable insecticidal efficacy under both single and combination pressures. While several important elements are covered in this study, such as gene silencing, post transcriptional changes, and protein breakdown, the most important aspect of this field that still need investigation is nitrogen metabolism. A thorough meta-analysis table provides an overview of the several significant research that have been carried out to examine the impacts of stress. A comprehensive study technique is needed to clarify the metabolic and physiological changes that transpire in transgenic cotton crops under high stress. In order to increase the production and performance of the cotton crop worldwide, more research is needed to address the unpredictable insect resistance of Bt crops.

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Section: Feeding Habit Of Pest's In Response To Change In Temperaturementioning

confidence: 90%

The Effectiveness and Performance of BT Cotton's Insecticidal Properties under Various Abiotic Stresses: A Review

Shahid,

Aziz,

Fatima

et al. 2023

AJRAF

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“…Strains belonging to B. thuringiensis are important agents for pest and phytopathogen control, especially because of the production of insecticidal and antimicrobial substances (Gomis-Cebolla and Berry, 2023). In addition to their relevance for agricultural applications, B. thuringiensis strains have also been explored due to the production of biomolecules with bioremediation potential, proteins with anticancer properties and clinically relevant antimicrobial peptides (Oliveira-Santos et al, 2023). Comparatively, P. polymyxa strains are distinguished biofertilizers that often show a variety of plant growth-promoting (PGP) traits, such as enhanced nutrient uptake by plants and phytohormone production, and may even act as biocontrol agents against phytopathogens (Langendries and Goormachtig, 2021).…”

Section: Species Dominance (Simpson Index)mentioning

confidence: 99%

Co-inoculation of the endophytes Bacillus thuringiensis CAPE95 and Paenibacillus polymyxa CAPE238 promotes Tropaeolum majus L. growth and enhances its root bacterial diversity

Dal’Rio,

Lopes,

Santaren

et al. 2024

Front. Microbiol.

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Tropaeolum majus L. is a versatile edible plant that is widely explored due to its medicinal properties and as a key element in intercropping systems. Its growth could be improved by the use of biofertilizers that can enhance nutrient uptake by the plant or provide tolerance to different abiotic and biotic stresses. In a previous study, 101 endophytes isolated from T. majus roots showed more than three plant growth-promoting (PGP) features in vitro, such as phosphate mineralization/solubilization, production of siderophores, antimicrobial substances and indole-related compounds, and presence of the nifH gene. To provide sustainable alternatives for biofertilization, the genomes of two promising endophytes—CAPE95 and CAPE238—were sequenced to uncover metabolic pathways related to biofertilization. Greenhouse experiments were conducted with 216 seeds and 60 seedlings, half co-inoculated with the endophytes (treatment) and half inoculated with 1X PBS (control), and the impact of the co-inoculation on the plant’s bacteriome was accessed through 16S rRNA gene metabarcoding. The strains CAPE95 and CAPE238 were taxonomically assigned as Bacillus thuringiensis and Paenibacillus polymyxa, respectively. Metabolic pathways related to the enhancement of nutrient availability (nitrogen fixation, sulfate-sulfur assimilation), biosynthesis of phytohormones (indole-3-acetic acid precursors) and antimicrobial substances (bacilysin, paenibacillin) were found in their genomes. The in vivo experiments showed that treated seeds exhibited faster germination, with a 20.3% higher germination index than the control on the eleventh day of the experiment. Additionally, treated seedlings showed significantly higher plant height and leaf diameters (p < 0.05). The bacterial community of the treated plants was significantly different from that of the control plants (p < 0.001) and showed a higher richness and diversity of species (Chao and Shannon indexes, p < 0.001). A higher relative abundance of potential synergistic PGP bacteria was also shown in the bacteriome of the treated plants, such as Lysinibacillus and Geobacter. For the first time, co-inoculation of B. thuringiensis and P. polymyxa was shown to have great potential for application as a biofertilizer to T. majus plants. The bacterial consortium used here could also be explored in other plant species in the future.

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More than just an insect killer: The non-insecticidal activities of Bacillus thuringiensis with biotechnological potential

Cited by 2 publications

References 82 publications

The Effectiveness and Performance of BT Cotton's Insecticidal Properties under Various Abiotic Stresses: A Review

The Effectiveness and Performance of BT Cotton's Insecticidal Properties under Various Abiotic Stresses: A Review

Co-inoculation of the endophytes Bacillus thuringiensis CAPE95 and Paenibacillus polymyxa CAPE238 promotes Tropaeolum majus L. growth and enhances its root bacterial diversity

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