Results 241 to 250 of about 52,804 (283)

Managing Insect Resistance to Plants Producing Bacillus thuringiensis Toxins

Critical Reviews in Biotechnology, 1999
R. Frutos, C. Rang, M. Royer
semanticscholar   +3 more sources

Mode of action of mosquitocidal Bacillus thuringiensis toxins.

Toxicon, 2007
Cry toxins from Bacillus thuringiensis (Bt) are used for insect control. Their primary action is to lyse midgut epithelial cells. In lepidopteran insects, Cry1A monomeric toxins interact with a first receptor and this interaction triggers toxin oligomerization.
M. Soberón, Luisa E. Fernandez, Claudia Pérez, S. Gill, A. Bravo   +4 more
semanticscholar   +3 more sources

Parasporal Crystal Toxins in Bacillus thuringiensis

2021
Some Gram-positive spore-forming bacteria, particularly Bacillus thuringiensis, synthesize parasporal crystalline inclusions bodies along the sporulation process. These crystals are formed by a variety of Cry and Cyt proteins (also named delta endotoxins) traditionally considered very interesting because, by different mechanisms of action, some of them
Carmen Sieiro, Ángeles Pichardo-Gallardo, Lara Areal-Hermida, Raquel Almuiña-González, Tomás G. Villa   +4 more
openaire   +1 more source

Nematoda: susceptibility of the egg to Bacillus thuringiensis toxins.

Experimental Parasitology, 1985
Crystalline toxins from Bacillus thuringiensis israelensis and B.t. kurstaki were lethal in vitro to eggs of the nematode Trichostrongylus colubriformis. The LD50 values for the two toxins were 0.38 ng and 37.5 micrograms total protein/ml, respectively. After 1 week at ambient temperature, the LD50 of B.t.
K. P. Bottjer, Leon W. Bone, Sarjeet S. Gill   +2 more
semanticscholar   +3 more sources

Bacillus thuringiensis toxin-mediated insect resistance in plants

Trends in Plant Science, 1999
We are currently in an interesting phase of plant biotechnology releases, both for the scientists responsible for these innovations who are beginning to see their ideas realized, and for the biotechnology companies that are starting to see a return on their investment.
de Maagd, R.A., Bosch, D., Stiekema, W.J.   +2 more
openaire   +2 more sources

Pathogenesis of Bacillus thuringiensis toxins

2000
The mode of action, and hence the histopathological events of all the δ-endotoxins produced as secondary metabolites by the species Bacillus thuringiensis are identical. The protein particles produced during the sporulation process have to be ingested by the target insects.
Peter Lüthy, Michael G. Wolfersberger
openaire   +1 more source

Bacillus thuringiensis Toxin Classification

2017
Since the first insecticidal crystal toxin genes from Bacillus thuringiensis (Bt) were cloned and sequenced in the late 1980s, there have been various attempts to classify these proteins in ways that would be useful for scientists working with them. Such methods have generally involved grouping them by either sequence similarity or by toxicity spectra.
openaire   +1 more source

Glycolipids as Receptors for Bacillus thuringiensis Crystal Toxin

Science, 2005
The development of pest resistance threatens the effectiveness of Bacillus thuringiensis (Bt) toxins used in transgenic and organic farming. Here, we demonstrate that (i) the major mechanism for Bt toxin resistance in Caenorhabditis elegans entails a ...
Joel S, Griffitts, Stuart M, Haslam, Tinglu, Yang, Stephan F, Garczynski, Barbara, Mulloy, Howard, Morris, Paul S, Cremer, Anne, Dell, Michael J, Adang, Raffi V, Aroian   +9 more
openaire   +2 more sources

Bacillus thuringiensis toxin gene expression in plants

1996
Plants expressing genes encoding -endotoxins (cry genes) from the bacterium #Bacillus thuringiensis# (Bt) have triggered great interest for the control of agronomically important insect pests. A wide variety of plant species has been transformed with genes coding for various toxins aimed mainly at Lepidopteran and Coleopteran pests.
Giband, Marc, Mazier, Marianne, Tourneur, J., Couzi, Philippe, Chauffaux, J., Pannetier, Catherine   +5 more
openaire   +3 more sources

Bacillus thuringiensis toxins and mode of action

Agriculture, Ecosystems & Environment, 1994
Abstract Bacillus thuringiensis produces a variety of toxins, with the major group being the crystal proteins. The crystal protein (cry) genes encoding for these proteins have recently been classified. The system is based on both the host range of the proteins and also on structure as it relates to DNA sequence. The mode of action of these toxins, in
openaire   +1 more source