Agrobacterium tumefaciens-mediated transformation of the lichen fungus, Umbilicaria muehlenbergii

Sook Young Park, Min Hye Jeong, Hai Ying Wang, Jung A. Kim, Nan Hee Yu, Sungbeom Kim, Yong Hwa Cheong, Seogchan Kang, Yong Hwan Lee, Jae Seoun Hur

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38 Scopus citations


Transformation-mediated mutagenesis in both targeted and random manners has been widely applied to decipher gene function in diverse fungi. However, a transformation system has not yet been established for lichen fungi, severely limiting our ability to study their biology and mechanism underpinning symbiosis via gene manipulation. Here, we report the first successful transformation of the lichen fungus, Umbilicaria muehlenbergii, via the use of Agrobacterium tumefaciens. We generated a total of 918 transformants employing a binary vector that carries the hygromycin B phosphotransferase gene as a selection marker and the enhanced green fluorescent protein gene for labeling transformants. Randomly selected transformants appeared mitotically stable, based on their maintenance of hygromycin B resistance after five generations of growth without selection. Genomic Southern blot showed that 88% of 784 transformants contained a single T-DNA insert in their genome. A number of putative mutants affected in colony color, size, and/or morphology were found among these transformants, supporting the utility of Agrobacterium tumefaciens-mediated transformation (ATMT) for random insertional mutagenesis of U. muehlenbergii. This ATMT approach potentially offers a systematic gene functional study with genome sequences of U. muehlenbergii that is currently underway.

Original languageEnglish (US)
Article numbere83896
JournalPloS one
Issue number12
StatePublished - Dec 30 2013

All Science Journal Classification (ASJC) codes

  • General


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