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Effect of IAA and Kinetin on Induction of Protonemal Gemmae and Gametophytes of Hypnum plumaeforme Wilson  

Ahmed, Md. Giush Uddin (Department of Horticultural Sciences, Chungbuk National University)
Lee, Cheol Hee (Department of Horticultural Sciences, Chungbuk National University)
Publication Information
FLOWER RESEARCH JOURNAL / v.18, no.1, 2010 , pp. 9-14 More about this Journal
Abstract
This study was conducted to examine the effects of IAA and kinetin on induction of gemmae and gametophytes in Hypnum plumaeforme moss during tissue culture. Explants were obtained from sterilized gametophyte tips cultured on solid basal medium containing Knop's major salts and Nitsch and Nitsch's trace elements. After culture, inoculated gametophyte tip produced protonema firstly, changed to new gametophytes after four weeks. Aseptic gametophytes were chopped and inoculated on the same media containing 0.01, 0.1, 1 and $10{\mu}M$ of IAA and kinetin. As a result, secondary protonemata as well as protonemal gemmae were formed from gametophytes. But protonemal gemmae formation was varied according to the concentration of IAA and kinetin. Lower concentration of IAA and kinetin promoted gemma formation and bud induction. Especially, $0.01{\mu}M$ of kinetin showed the highest frequency of bud and gemma production. All the materials, obtained from $0.01{\mu}M$ kinetin medium, were subcultured to media supplemented with 0.01, 0.1, 1 and $10{\mu}M$ of IAA and kinetin again to induce gametophytes. After subculture, protonema and calli were developed from secondary protonema, and induced gametophytes finally. IAA regulated induction and growth of gametophytes, and kinetin influenced gemma formation and gametophyte induction also. All aspects of development of this moss species were governed by the external growth regulators.
Keywords
auxin; cytokinin; micropropagation; moss; protonema;
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