Articles

EFFICIENCY OF PMI/MANNOSE AS A SELECTABLE MARKER FOR TRANSFORMATION OF KALANCHOE

Article number
929_63
Pages
437 – 443
Language
English
Abstract
Mannose is an unsuitable carbon source for many plants.
Various factors were studied to evaluate the efficacy of mannose in the selection process for production of transgenic plants using Agrobacterium tumefaciens-mediated transformation of leaf explants of Kalanchoe blossfeldiana. To establish a non-antibiotic selection system that utilizes the phosphomannose-isomerase (PMI) gene from E. coli, we determined the optimum mannose concentration for selecting transformed cells.
Shoot organogenesis in K. blossfeldiana leaf explants was suppressed effectively on medium supplemented with mannose, or mannose with glucose, which indicated that Kalanchoe cells had little or no PMI activity and could not utilize mannose as a carbon source.
The optimum concentration of mannose was found to eliminate non-transgenic shoots.
Transformed plants were confirmed by GUS assay.
Transformation efficiency ranged up to ca. 40%. The PMI/mannose system provides an efficient method for selecting transgenic plants without antibiotics or herbicides.

Publication
Authors
A. Ilczuk, H. Mibus, M. Schmidt , M. Serek
Keywords
Agrobacterium tumefaciens, phosphomannose isomerase, selection agent
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