Results 41 to 50 of about 6,820 (210)

Hematotoxicity of bacillus thuringiensis as spore-crystal strains cry1aa, cry1ab, cry1ac or cry2aa in swiss albino mice [PDF]

, 2013
Formulated and sporulated cultures of Bacillus thuringiensis (Bt) have been widely used against insect pests, but after the advent of genetically modified plants expressing δ-endotoxins, the bioavailability of Cry proteins has been increased.
Barbosa, Lilian Carla Pereira, Freire, Ingrid de Souza, Grisolia, Cesar Koppe, Lacava, Zulmira Guerrero Marques, Mezzomo, Bélin Poletto, Miranda-Vilela, Ana Luisa, Portilho, Flávia Arruda   +6 more
core   +1 more source

Cry1Ac Transgenic Sugarcane Does Not Affect the Diversity of Microbial Communities and Has No Significant Effect on Enzyme Activities in Rhizosphere Soil within One Crop Season

Frontiers in Plant Science, 2016
Cry1Ac transgenic sugarcane provides a promising way to control stem-borer pests. Biosafety assessment of soil ecosystem for cry1Ac transgenic sugarcane is urgently needed because of the important role of soil microorganisms in nutrient transformations ...
Dinggang eZhou, Liping eXu, Shiwu eGao, Jinlong eGuo, Jun eLuo, Qian eYou, Youxiong eQue   +6 more
doaj   +1 more source

Weak Transcription of the cry1Ac Gene in Nonsporulating Bacillus thuringiensis Cells [PDF]

Applied and Environmental Microbiology, 2012
ABSTRACT The cry1Ac gene of Bacillus thuringiensis subsp. kurstaki HD-73 ( B. thuringiensis HD-73) is a typical example of a sporulation-dependent crystal gene and is controlled by sigma E and sigma K during sporulation. To monitor the
Yang, Hui, Wang, Pinshu, Peng, Qi, Rong, Rong, Liu, Chunxia, Lereclus, Didier, Zhang, Jie, Song, Fuping, Huang, Dafang   +8 more
openaire   +4 more sources

Foreign cry1Ac gene integration and endogenous borer stress-related genes synergistically improve insect resistance in sugarcane

BMC Plant Biology, 2018
Background Sugarcane (Saccharum spp. hybrids) is considered the most globally important sugar-producing crop and raw material for biofuel. Insect attack is a major issue in sugarcane cultivation, resulting in yield losses and sucrose content reductions ...
Dinggang Zhou, Xiaolan Liu, Shiwu Gao, Jinlong Guo, Yachun Su, Hui Ling, Chunfeng Wang, Zhu Li, Liping Xu, Youxiong Que   +9 more
doaj   +1 more source

Kinetics of pore formation by the Bacillus thuringiensis toxin Cry1Ac

Biochimica et Biophysica Acta (BBA) - Biomembranes, 2007
After binding to specific receptors, Cry toxins form pores in the midgut apical membrane of susceptible insects. The receptors could form part of the pore structure or simply catalyze pore formation and consequently be recycled. To discriminate between these possibilities, the kinetics of pore formation in brush border membrane vesicles isolated from ...
Fortier, Mélanie, Vachon, Vincent, Marceau, Lucie, Schwartz, Jean-Louis, Laprade, Raynald   +4 more
openaire   +2 more sources

Analysis of the Effect of Plutella xylostella Polycalin and ABCC2 Transporter on Cry1Ac Susceptibility by CRISPR/Cas9-Mediated Knockout

Toxins, 2023
Many insects, including the Plutella xylostella (L.), have developed varying degrees of resistance to many insecticides, including Bacillus thuringiensis (Bt) toxins, the bioinsecticides derived from Bt.
Lei Xiong, Zhaoxia Liu, Jingge Li, Shuyuan Yao, Zeyun Li, Xuanhao Chen, Lingling Shen, Zhen Zhang, Yongbin Li, Qing Hou, Yuhang Zhang, Minsheng You, Zhiguang Yuchi, Shijun You   +13 more
doaj   +1 more source

Establishment of Dipstick Development Technology for Detection of Cry1Ac in Transgenic Plants [PDF]

, 2017
The insecticidal Bt Cry1Ac protein is, currently used for transgene expression in numerous crops or deliberating resistance against lepidopteron pests. Since the introduction of Bt cotton in Pakistan.
Asif, M. (Muhammad), Bashir, A. (Aftab), Irfan, M. (Muhammad), Malik, K. A. (Kauser)   +3 more
core   +1 more source

Tri-trophic studies using Cry1Ac-resistant Plutella xylostella demonstrate no adverse effects of Cry1Ac on the entomopathogenic nematode, Heterorhabditis bacteriophora. [PDF]

Journal of economic entomology, 2014
The potential impacts on natural enemies of crops that produce insecticidal Cry proteins from Bacillus thuringiensis (Bt) are an important part of an environmental risk assessment. Entomopathogenic nematodes are important natural enemies of lepidopteran pests, and the effects of Bt crops on these nontarget organisms should be investigated to avoid ...
Gautam, Saurabh, Olmstead, Daniel, Tian, Jun-Ce, Collins, Hilda L., Shelton, Anthony M.   +4 more
openaire   +1 more source

Characterization and Analysis of Sip1Aa Protein Expressed by cry1Ac Promoter [PDF]

, 2021
Abstract In this study, based on the pUC19 vector and using overlapping PCR technology, the researchers constructed an expression vector of the Sip1Aa protein guided by a cry1Ac promoter. The expression situation, insecticidal activity and solubility were researched, and the expression of the Sip1Aa protein, as guided by a T7 promoter, was ...
Jing Wang, Mingyue Ding, Lin Wang, Jun Cui, Haitao Li, Jiguo Gao   +5 more
openaire   +1 more source

Biochemical Responses of Anopheles spp. Larvae to a Novel Brazilian BR101 Bacillus thuringiensis var. israelensis Formulation: Oxidative Stress, Detoxification Enzymes, and Safety for Nontarget Notonectidae and Gerridae Aquatic Insects

Chemistry &Biodiversity, Volume 23, Issue 2, February 2026.
Bti BR101 exhibits strong larvicidal activity against Anopheles larvae spp., with dose‐dependent mortality and LC50 of 3.13 µg/mL. Bti increases ROS, lipid and protein oxidation, and activates antioxidant enzymes (SOD, CAT, GPx) and detoxification pathways (MFO and esterases), indicating moderate oxidative stress.
Izabel Cristina de Oliveira Bentes, Dayane Dantas Abensour, Maria Luiza Lima da Costa, Raquel Telles de Moreira Sampaio, Leticia Bernadete da Silva, Francisco Augusto da Silva Ferreira, Cláudia Patrícia da Silva Tavares, Hergen Vieira de Souza, Francisco de Assis Marque, Mário Antonio Navarro da Silva, Eduarda Andrade de Lima, Gislayne Trindade Vilas‐Boas, João Antonio Cyrino Zequi, André Correa de Oliveira, Rosemary Aparecida Roque   +14 more
wiley   +1 more source