<Emphasis Type="Italic">Agrobacterium-</Emphasis>mediated transformation of gypsophila (<Emphasis Type="Italic">Gypsophila paniculata</Emphasis> L.) |
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Authors: | Michal Moyal Ben Zvi Amir Zuker Marianna Ovadis Elena Shklarman Hagit Ben-Meir Shamir Zenvirt Alexander Vainstein |
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Affiliation: | (1) The Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P. O. Box 12, Rehovot, 76100, Israel |
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Abstract: | As a major contributor to the flower market, Gypsophila paniculata is an important target for the breeding of new varieties. However, gypsophila breeding is strongly hampered by the sterility
of this species’ genotypes and the lack of a genetic-transformation procedure for this genus. Here we describe the establishment
of a transformation procedure for gypsophila (Gypsophila paniculata L.) based on Agrobacterium inoculation of highly regenerative stem segments. The transformation procedure employs stem explants derived from GA3-pretreated mother plants and a two-step selection scheme. The GA3 treatment was crucial for obtaining high gene-transfer frequencies (75–90% GUS-expressing explants out of total inoculated
explants), as shown using three different gypsophila varieties. An overall transformation efficiency of five GUS-expressing
shoots per 100 stem explants was demonstrated for cv. Arbel. The applicability of the transformation system to gypsophila
was further reinforced by the generation of transgenic plants expressing Agrobacterium rhizogenes
rolC driven by a CaMV 35S promoter. Transgenic gypsophila plantlets exhibited extensive rooting and branching, traits that could
be beneficial to the ornamental industry. |
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Keywords: | Genetic transformation Gypsophila Ornamentals rolC |
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