Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Pakistan Journal of Biological Sciences
  Year: 1999 | Volume: 2 | Issue: 4 | Page No.: 1472-1477
DOI: 10.3923/pjbs.1999.1472.1477
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Entomocidal Activity of Bacillus Thuringiensis Transgenic Rice Plants Against Rice Leaffolder, Cnaphalocrocis Medinalis (Lepidoptera: Pyralidae).

Rizwana Anwar , Shahid Karim and S. Riazuddin

Abstract:
Transgenic rice plants obtained through the incorporation of Bt cry1Ac gene. Initially putative transformants were screened for pesticidal activity against rice leaf folder larvae. Selected putative transformants showed a range of larval mortality from 20-100 percent to C. medinalis. The integration of the Bt cry gene was checked by Polymerase Chain Reaction (PCR), using primers 5` ACA GAA GAC CCT TCA ATA TC 3` and 3` GTT ACC GAG TGA AGA TGT AA 5` for amplification of a 656 bp fragment of DNA from the genomic DNA of putative transformants. Selection based on PCR and initial bioassays, two transgenic plants designated as, CAMB 1148 and CAMB 1150 were further confirmed for toxin expression by ELISA, Western blot analysis and comparative biotoxicity assay. ELISA and Western blot were performed with polyclonal antibody of Cry1Ac toxins that showed the presence of active ingredient of Bt toxin in both plants. Biotoxicity assays also reconfirmed the stability and activity of Cry toxins in both transgenic rice plants, eventually aiming for homozygosity with enhanced resistance to rice leaf folder.
PDF Citation Report Citation
 RELATED ARTICLES:
  •    Natural Variation among Rice Yellow Stem Borer, Scirpophaga incertulas (Walker) and Rice Leaffolder, Cnaphalocrocis medinalis (Guenee) Populations to Bacillus thuringiensis δ-endotoxins
  •    Occurrence of cry Genes in Bacillus thuringiensis (Bt) Isolates Recovered from Phylloplanes of Crops Growing in the New Delhi Region of India and Toxicity Towards Diamond-back Moth (Plutella xylostella)
  •    Screening of Bacillus thuringiensis Isolates Recovered from Diverse Habitats in India for the Presence of cry1A-type Genes and Cloning of a cry1Ac33 Gene Toxic to Helicoverpa armigera (American Bollworm)
How to cite this article:

Rizwana Anwar , Shahid Karim and S. Riazuddin , 1999. Entomocidal Activity of Bacillus Thuringiensis Transgenic Rice Plants Against Rice Leaffolder, Cnaphalocrocis Medinalis (Lepidoptera: Pyralidae).. Pakistan Journal of Biological Sciences, 2: 1472-1477.

DOI: 10.3923/pjbs.1999.1472.1477

URL: https://scialert.net/abstract/?doi=pjbs.1999.1472.1477

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Curve Bottom