Recent advancement on chemical arsenal of Bt toxin and its application in pest management system in agricultural field
Pritam Chattopadhyay,Goutam Banerjee +1 more
- Vol. 8, Iss: 4, pp 201-201
TLDR
The updated information regarding the insecticidal Bt toxins and their different mode of actions were summarized and the problem of insect resistance and the strategies to combat with this problem were summarized.Abstract:
Bacillus thuringiensis (Bt) is a Gram-positive, spore-forming, soil bacterium, which is very popular bio-control agent in agricultural and forestry. In general, B. thuringiensis secretes an array of insecticidal proteins including toxins produced during vegetative growth phase (such as secreted insecticidal protein, Sip; vegetative insecticidal proteins, Vip), parasporal crystalline δ-endotoxins produced during vegetative stationary phase (such as cytolytic toxin, Cyt; and crystal toxin, Cry), and β-exotoxins. Till date, a wide spectrum of Cry proteins has been reported and most of them belong to three-domain-Cry toxins, Bin-like toxin, and Etx_Mtx2-like toxins. To the best of our knowledge, neither Bt insecticidal toxins are exclusive to Bt nor all the strains of Bt are capable of producing insecticidal Bt toxins. The lacuna in their latest classification has also been discussed. In this review, the updated information regarding the insecticidal Bt toxins and their different mode of actions were summarized. Before applying the Bt toxins on agricultural field, the non-specific effects of toxins should be investigated. We also have summarized the problem of insect resistance and the strategies to combat with this problem. We strongly believe that this information will help a lot to the budding researchers in the field of modern pest control biotechnology.read more
Citations
More filters
Journal ArticleDOI
The Food Poisoning Toxins of Bacillus cereus
TL;DR: The authors in this paper reviewed the current knowledge on distribution and genetic organization of the toxin genes, as well as mechanisms of enterotoxin gene regulation and toxin secretion and highlighted the exceptionally high variability of toxin production between single strains.
Journal ArticleDOI
Bacillus cereus food intoxication and toxicoinfection
TL;DR: A review of the latest knowledge on Bacillus cereus toxins and accessory virulence factors can be found in this article, where the authors describe the novel taxonomy and some pertinent phenotypic characteristics of B. cereus related to food safety.
Journal ArticleDOI
Natural bacterial isolates as an inexhaustible source of new bacteriocins.
TL;DR: A review of the knowledge of bacteriocins produced by natural isolates, with a particular emphasis on the most common location of their genes and operons, plasmids, and the importance of the relationship between the plasmidome and the adaptive potential of the isolate is presented in this article.
Journal ArticleDOI
Enteropathogenic Potential of Bacillus thuringiensis Isolates from Soil, Animals, Food and Biopesticides.
TL;DR: The present study shows a non-negligible pathogenic potential of B. thuringiensis, independently from the origin of isolation, and the use of these pesticides might indeed increase the risk for consumers’ health.
Journal ArticleDOI
Which Is Stronger? A Continuing Battle Between Cry Toxins and Insects.
TL;DR: In this paper, the authors review the latest works on the insecticidal mechanisms of Bacillus thuringiensis Cry toxins and the resistance mechanisms of insects against Cry toxins, which can further facilitate the development and utilization of Cry toxins.
References
More filters
Journal ArticleDOI
Insecticidal crystal proteins of Bacillus thuringiensis.
Herman Höfte,H R Whiteley +1 more
TL;DR: In this article, a classification for crystal protein genes of Bacillus thuringiensis is presented, based on the insecticidal spectra and the amino acid sequences of the encoded proteins.
Insecticidal crystal proteins of Bacilllus thuringiensis
H. Höfte,H.R. Whiteley +1 more
TL;DR: Studies on the biochemical mechanisms of toxicity suggest that B. thuringiensis crystal proteins induce the formation of pores in membranes of susceptible cells, and these approaches are potentially powerful strategies for the protection of agriculturally important crops against insect damage.
Journal ArticleDOI
Mode of action of Bacillus thuringiensis Cry and Cyt toxins and their potential for insect control.
TL;DR: Recent evidence suggests that Cyt synergize or overcome resistance to mosquitocidal-Cry proteins by functioning as a Cry-membrane bound receptor, and compares them to the mode of action of other bacterial PFT.
Journal ArticleDOI
Revision of the Nomenclature for the Bacillus thuringiensis Pesticidal Crystal Proteins
Neil Crickmore,Daniel R. Zeigler,Jerald S. Feitelson,E. Schnepf,J. Van Rie,Didier Lereclus,J. Baum,Donald H. Dean +7 more
TL;DR: A new nomenclature, based on hierarchical clustering using amino acid sequence identity, is proposed, consisting of 133 crystal proteins comprising 24 primary ranks are systematically arranged.
Journal ArticleDOI
Transgenic pollen harms monarch larvae
TL;DR: In a laboratory assay, it is found that larvae of the monarch butterfly, Danaus plexippus, reared on milkweed leaves dusted with pollen from Bt corn, ate less, grew more slowly and suffered higher mortality than larvae rearing on leaves dusting with untransformed corn pollen or on leaves without pollen.