Assessment of factors influencing the tissue culture-independent Agrobacterium-mediated in planta genetic transformation of okra [Abelmoschus esculentus (L.) Moench]

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• 作者：Markandan Manickavasagam…
• 关键词：Abelmoschus esculentus (L.) Moench ; Acetosyringone ; In planta genetic transformation ; Sonication ; Vacuum infiltration
• 刊名：Plant Cell, Tissue and Organ Culture
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：123
• 期：2
• 页码：309-320
• 全文大小：1,299 KB
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  Subramanyam K, Subramanyam K, Sailaja
• 作者单位：Markandan Manickavasagam (1)
  Kondeti Subramanyam (1) (2)
  Rajagobalan Ishwarya (1)
  Dhandapani Elayaraja (1)
  Andy Ganapathi (1)
  
  1. Department of Biotechnology and Genetic Engineering, School of Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India
  2. Laboratory of Biochemistry and Glycobiology, Department of Molecular Biotechnology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Plant Physiology
  
• 出版者：Springer Netherlands
• ISSN：1573-5044

文摘

Regeneration of transformed plants from the Agrobacterium-infected tissue is a time-consuming process and requires hard work. Okra [Abelmoschus esculentus (L.) Moench] is highly recalcitrant to Agrobacterium-mediated genetic transformation and regeneration. In this study, we established a tissue culture-independent genetic transformation system for okra using seed as an explant. Agrobacterium tumefaciens EHA 105 harbouring the binary vector pCAMBIA 1301-em class="EmphasisTypeItalic ">bar was used to infect the okra seeds. Various parameters influencing the okra genetic transformation including, co-cultivation duration, acetosyringone, sonication, and vacuum infiltration have been evaluated. Maximum transformation efficiency of 18.3 % was recorded when the pre-cultured okra seeds were sonicated for 30 min and vacuum infiltrated for 3 min in Agrobacterium suspension containing 100 μM acetosyringone and co-cultivated for 3 days on a medium containing 100 μM acetosyringone. The GUS histochemical analysis confirmed the gus A gene integration and expression, whereas polymerase chain reaction (PCR) and Southern blot hybridization confirmed the bar gene integration and copy number in the transformed okra genome. The transgene was successfully segregated into the progeny plants with a Mendelian inheritance ratio of 3:1. The in planta transformation protocol developed in the present investigation is applicable to transform the okra plants with disease-resistant traits, and the transformed plants can be generated within 60 days. Keywords Abelmoschus esculentus (L.) Moench Acetosyringone In planta genetic transformation Sonication Vacuum infiltration