Plant Transformation Technologies

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Trichoderma virens is a fungus used for biological control of plant disease. An endochitinase gene from this fungus has been cloned and a gene construct for expressing this gene in plants is prepared. This construct is now ready to be introduced to commercial cultivars for obtaining disease tolerant crop plants. The management of these diseases, where available, relies heavily on synthetic chemical fungicides, and poses considerable ecological damage and health hazards to livestock.


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Infrastructural requirements. Click here for Technology Transfer Application Form. Fax : Email : technology barc. How to apply. Quick View Leaflet Fungal diseases of crop plants cause huge damage and reduce crop productivity significantly. Plant transgenic technologies are key to state-of-the-art plant molecular genetics and GM crop improvement. The development of facile and high-throughput Agrobacterium-mediated transformation systems in Arabidopsis thaliana and, to a lesser extend, in rice have been critical to the development of functional genomic programmes in both species.


  1. What Is Plant Transformation?.
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  4. However, current Agrobacterium-mediated transformation systems remain inefficient in many important plant species especially in crops. RNAi-deficient plants were shown to be hyper-susceptible to the virulent bacterium. This pilot project aims at testing if these recent findings could be used to improve existing plant transformation technologies through novel modifications based on suppression of the plant gene silencing pathways.

    Transgenic Plants: Gene Constructs, Vector and Transformation Method

    Does not have methylases6. Is deficient in normal recombination function : so thatit is not altered by recombination events. Nopaline OctopineAcetosyringone Process of T-DNA transfer and integration1. Signal recognition by Agrobacterium:-Agrobacterium perceive signals such as sugar and phenolic compoundswhich are released from plants. Attachment to plants cells:Two step processes: i initial attachment via polysaccharide ii mesh ofcellulose fiber is produced by bacteria.

    Virulence genes chv genes are involved in the attachment of bacterialcells to the plants cells. Vir gene induction:VirA senses phenolics ans subsequently phosphorylating and therebyactivating VirG. VirG then induces expression of all the vir genes.

    Historical Technology Developments in Plant Transformation

    Then virD2 attachedto ssDNA. Process of T-DNA transfer and integration continu 5.

    Agrobacterium tumefaciens Mediated Gene Transfer

    VirE2 and VirF arealso exported from bacterial cells. Andintegrated into host chromosome. Agrobacterium mediated transformationmethods are thought to induce lessrearrangement of the transgene.


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    • Agrobacterium-Mediated Plant Transformation: Biology and Applications.
    • THE BIOLOGY OF AGROBACTERIUM-PLANT INTERACTIONS AND T-DNA TRANSFORMATION.
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    The basic protocol used for any Agrobacteruimmediated transformation experiments1. Identify a suitable explants: Suitable plant tissue isremoved and sterilized. Leaf is used for Tobacco. Co-cultivate with the Agrobacterium: Leaf tissue is cutinto small pieces and placed into a culture of Agrobacteriumfor about 30 mins. The explants are subsequently removedfrom the bacterial culture and placed on to the MS mediumthat contain no selective agent.

    Plant transformation methods

    The incubation of explantswith Agrobacterium is allowed to continue for 2 days to allowtransfer of the T-DNA transfer to the plant cells. Kill the Agrobacterium with a suitable antibiotic: Theexplants are removed from the medium and washed inantibiotic cefotaxime solution that kill Agrobacterium cells.

    The basic protocol used for any Agrobacteruimmediated transformation experiments Conti- 4. Select for transformed plant cells: The explantare transferred to fresh solid medium supplementedwith a selective agent kanamycin. It also containscefotaxime. Auxin, Cytokinin are used to encourage theregeneration of by organogenesis.

    High cytokinin toauxin ratio promotes shoot formation from theexplants. Regeneration of whole plant :The shoot can berooted by placing them on solid medium containing ahigh auxin to cytokinin ratio. Advantages of A. As resultof tissue culture limitations are much less of a problem.