Abstract
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This study established an efficient method of regenerating plants of Ficus lyrata and producing purple-leaved F. lyrata plants through genetic transformation using a VvMybA1 gene of grapevine.
Abstract
Ficus lyrata, a species with unique violin- or guitar-shaped leaves, was regenerated from leaf-derived calli cultured on Murashige and Skoog (MS) basal medium supplemented with 4.5 μM N-phenyl-N’-1, 2, 3-thiadiazol-5-yl urea (TDZ) and 0.5 μM α-naphthalene acetic acid (NAA). Leaf discs were inoculated with Agrobacterium tumefaciens strain EHA 105 harboring a binary vector DEAT that contains the VvMybA1 gene and neomycin phosphotransferase (npt II) gene and subsequently cultured on the established regeneration medium supplemented with 100 mg l−1 kanamycin. Results showed that 87.5 % of the leaf discs produced kanamycin-resistant callus, and 68.8 % of them produced adventitious shoots. Transgenic plants with three leaf colors including green, green-purple, and purple were produced. Regular and quantitative real-time PCR analyses confirmed the integration of transgenes into the host genome. Semi-quantitative RT-PCR analysis indicated that the VvMybA1 gene was responsible for the purple-colored phenotype. Purple-leaved plants with strong color stability grew vigorously in a greenhouse. This study illustrated the feasibility of using a genetically engineered VvMybA1 gene for drastic modification of leaf color of an important woody ornamental plant.
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The authors thank Oglesby Plant International, Inc. (Altha, FL, USA) for providing microshoots of Ficus lyrata and Terri Mellich for performing DNA flow cytometry analysis.
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Communicated by K. Kamo.
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Zhao, J., Li, Z.T., Chen, J. et al. Purple-leaved Ficus lyrata plants produced by overexpressing a grapevine VvMybA1 gene. Plant Cell Rep 32, 1783–1793 (2013). https://doi.org/10.1007/s00299-013-1491-5
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DOI: https://doi.org/10.1007/s00299-013-1491-5