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Fu, J., Momcilovic, I., Clemente, T.E., Nersesian, N., Trick, H.N. and Ristic, Z. (2008) Heterologous expression of a plastid EF-Tu reduces protein thermal eggregation and enhances CO2 fixation in wheat (Triticum aestivum) following exposure to heat stress. Plant molecular biology, 68, 277-288. doi:10.1007/s11103-008-9369-6

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• TITLE: Minor modifications in obtainable Arabidopsis floral dip method enhances transformation efficiency and production of homozygous transgenic lines harboring a single copy of transgene

  AUTHORS: Priyanka Das, Naveen Chandra Joshi

  KEYWORDS: Arabidopsis thaliana; Floral-Dipping; Copy Number; Homozygous; Inoculum; Transgenic Plant

  JOURNAL NAME: Advances in Bioscience and Biotechnology, Vol.2 No.2, March 18, 2011

  ABSTRACT: Many researchers have developed various methods for in-planta or floral dip transformation of Arabidopsis thaliana, one of the simple protocol and widely used to produce transgenic Arabidopsis. As the efficiency and ease of getting a transformant is very much time consuming effort and less number of the transformants people get, we have developed a little modified transformation protocol to avoid the disparities. Four types of inoculums (inoculum1, inoculum2, inoculum3 and inoculum4) were used to check the transformation efficiency out of which Inoculum3 showed the highest rate of transformation among the four types. 0.07% Twin-20 also acts in same manner as silwet L-77 to increase the rate of transformation efficiency and glucose instead of sucrose can be used in inoculum to transform Arabidopsis. After vacuum infiltration keeping the Agrobacterium infected plants for 7-8 hrs horizontally in low light at 280C temperature condition, considered best to get an increased number of transformed seeds. Modified protocol produced ~12-14% increase in transformants. Selection pots (kanamycin supplemented soil filled pots) in place of selection plates (Kanamycin supplemented Murashige and Skoog agar plates) proved beneficial as no MS medium and no aseptic condition is required for selection of transformed plants. This increase in transformation efficiency consequently increased the percentage of homozygous and single copied stable transgenic lines.