Sood, Priyanka and Bhattacharya, Amita and Joshi, Robin and Gulati, Ashu and Chanda , Sanjoy and Sood, A (2013) A method to overcome the waxy surface, cell wall thickening and polyphenol induced necrosis at wound sites - the major deterrents to Agrobacterium mediated transformation of bamboo, a woody monocot. Journal of Plant Biochemistry and Biotechnology.

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The method is the first successful report of Agrobacterium mediated genetic transformation of the commercially important bamboo, Dendrocalamus hamiltonii. It shows how the resistance provided by the somatic embryos of this woody monocot can be overcome using a simple and effective method. The method thus standardized can be also used for the genetic transformation of other important bamboos. Identification of the factors responsible for the resistance of the somatic embryos to Agrobacterium infection was an absolute requirement for devising a successful method. Necrosis due to polyphenol oxidation, lack of differentiation due to cell wall thickening at wound sites, waxy surfaces of somatic embryos with anti-microbial properties were found to prevent Agrobacterium attachment and infection. Therefore, the somatic embryos were transformed with fresh overnight grown Agrobacterium culture containing 500 mg/l polyvinylpyrrolidone (PVP) and 0.01 % Tween- 20 as surfactant followed by co-cultivation on Murashige and Skoog (MS) medium containing the vir gene inducer acetosyringone (100 μM) and 1 mg/l 6-Benzylaminopurine BAP for 2 days. Persistent GUS expression and strong positive signals in PCR, slot blot and Southern hybridization confirmed successful genetic transformation.

Item Type: Article
Uncontrolled Keywords: Dendrocalamus hamiltonii . Genetic transformation . GUS expression . PCR . Polyvinylpyrrolidone . Tween-20
Subjects: Plant sciences
Plant Biotechnology
Depositing User: Dr. Aparna Maitra Pati
Date Deposited: 09 Apr 2013 07:45
Last Modified: 09 Apr 2013 07:45

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