The application of plant genetic manipulations to agriculture and forestry with the aim of alleviating insect damage through Bacillus thuringiensis transformation could lead to a significant reduction in the release of pesticides into the environment. However, many groups have come forward with very valid and important questions related to potentially adverse effects, and it is crucial to asses...

REPRESSOR OF SILENCING 1 (ROS1) is a DNA demethylation enzyme that was previously identified during a genetic screen for the silencing of both RD29A-LUC and 35S-NPTII transgenes on a T-DNA construct. Here we performed a genetic screen to identify additional mutants in which the 35S-NPTII transgene is silenced. We identified several alleles of ros1 and of the following components of the RNA-dire...

Citation: Cheavegatti-Gianotto A, Gentile A, Oldemburgo DA, Merheb GdA, Sereno ML, Lirette RP, Ferreira THS and Oliveira WSd (2018) Lack of Detection of Bt Sugarcane Cry1Ab and NptII DNA and Proteins in Sugarcane Processing Products Including Raw Sugar. Front. Bioeng. Biotechnol. 6:24. doi: 10.3389/fbioe.2018.00024 lack of Detection of Bt sugarcane cry1ab and nptii Dna and Proteins in sugarcane...

Previous work has suggested that de novo methylation of plant nuclear genes can be triggered by an RNA-DNA interaction. To test whether transcription of a promoter would induce de novo methylation and silencing of unlinked genes driven by the same promoter, a chimeric 'gene' consisting of a nopaline synthase promoter (NOSpro) positioned downstream of the cauliflower mosaic virus 35S promoter (3...

pod borer is one of the main factors for yield decrease of chickpea. therefore, breeding of chickpea for resistance to this pest is important. modified cry1ac gene of bacillus thuringiensis in pcry1ac-nptii plasmid containing twin t-dna for cry1ac and nptii genes have been used for transformation of chickpea. at last 38 plants had nptii gene that 36 plants of them had cry1ac gene and two plants...

Activity of neomycin phosphotransferase II (NPTII; gene, neo; five cysteines) in tobacco protoplasts transfected with fusions of the octopine TR2' or cauliflower mosaic virus 35S promoter and the neo gene, with or without a signal peptide, increased up to 8-fold in response to externally added dithiothreitol at concentrations that did not affect protoplast viability (up to 2.5 mM). Activity of ...

In an attempt to clone the ORF of the nptII gene of Escherichia coli K12 (ATCC 10798), two degenerate primers were designed based on the nptII sequence of its Tn5 transposon. The nptII ORF was placed under the control of the E. coli hybrid trc promoter, in the pKK388-1 vector, transformed into E. coli DH5α ΔrecA (recombinant, deficient strain). Transferred cells were tested for ampicillin, tetr...

Transformation experiments were carried out using different explants of two varieties of white jute (Corchorus capsularis L.), namely, CVL-1 and CVE-3 with Agrobacterium tumefaciens strain (LBA4404/pBI121) containing the GUS and nptII genes. Maximum transformation ability was obtained from petiole-attached cotyledons and mature embryo explants. Kanamycin at a concentration of 200 mg/l was found...

We screened for suppressors of repressor of silencing1 (ros1) using the silenced 35S promoter-neomycin phosphotransferase II (Pro(35S):NPTII) gene as a marker and identified two allelic mutants, ror1-1 and ror1-2 (for suppressor of ros1). Map-based cloning revealed that ROR1 encodes a 31-kD protein similar to DNA replication protein A2 (RPA2A). Mutations in ROR1 reactivate the silenced Pro(35S)...

Two closely related ribulose-1,5-bisphosphate carboxylase small subunit (SSU) genes, SRS1 and SRS4, are transcribed at high levels in soybean plants in response to light. Transgenic petunia plants containing 5' sequences from SRS1 or SRS4 fused to the polypeptide encoding region of a neomycin phosphotransferase (NPTII) gene exhibit selectable kanamycin resistance. Deletion of three ATG codons f...