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http://dx.doi.org/10.5010/JPB.2003.30.2.115

Plant Regeneration and Transformation of Kentucky Bluegrass(Poa pratensis L.) via the Plant Tissue Culture  

Miki Kusano (College of Agricultural and Life Science, Cheju National University)
Koichi Tohyama (College of Agricultural and Life Science, Cheju National University)
Bae, Chang-Hyu (College of Agricultural and Life Science, Sunchon National University)
Riu, Key-Zyung (College of Agricultural and Life Science, Cheju National University)
Lee, Hyo-Yeon (College of Agricultural and Life Science, Cheju National University)
Publication Information
Journal of Plant Biotechnology / v.30, no.2, 2003 , pp. 115-121 More about this Journal
Abstract
In this study, plant regeneration and Agrobacterium tumefaciens-mediated transformation Kentucky bluegrass(Poa pratensis L.) were evaluated. Three different types of calli were produced depending on the combinations of growth regulators. They were non-friable brown or gray-colored callus (type I), compact, friable and yellow or white-colored callus (typeII), and soft, watery translucent callus with differentiated structure (typeIII). The highest regenerable organogenic callus (typeII) was obtained on the medium containing 1mg/L, 2,4-D and 0.1mg/L BA. Additionally, the production of typeII calli increased significantly when AgNO$_3$ was added to the callus induction and growth medium. The highest frequency of multiple shout formation from typeII callus was obtained on MS medium containing 1mg/L BA and 1mg/L Thidiazuron(TDZ). The organogenic calli(typeII) were inoculated with Agrobacterium tumefaciens strain EHA101 harboring the binary vector pIG121Hm with $\beta$-glucuronidase gene, and various factors were found to influence the transfer-DNA delivery efficiency. The highest transient GUS activity was observed on typeIIcallus. In the present work, we reported the first transient GUS activity of Kentucky bluegrass mediated by Agrobacterium tumefaciens. Our system may contribute to genetic improvement for breed-recalcirtrant grass species, Kentucky bluegrass.
Keywords
Agrobacterium tumefaciens; callus type; kentucky bluegrass; regeneration;
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