Production of dodecaploid plants of Japanese persimmon (Diospyros kaki L.) by colchicine treatment of protoplasts |
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Authors: | Mihoko Tamura Ryutaro Tao Akira Sugiura |
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Institution: | (1) Department of Biotechnological Science, Faculty of Biology Oriented Science and Technology, Kinki University, Uchita, 649-64 Wakayama, Japan;(2) Laboratory of Pomology, Faculty of Agriculture, Kyoto University, Sakyo-ku, 606-01 Kyoto, Japan |
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Abstract: | Summary Dodecaploid plants of Japanese persimmon (Diospyros kaki L.) were obtained by colchicine treatment of protoplasts. Callus protoplasts of Jiro (2n=90, x=15) were cultured in modified KM8p medium with 0.1% colchicine for 3–9 days. After colchicine treatment, they were cultured using agarose bead culture. Microcalli were recovered from the protoplasts after 3 months. Flow cytometric measurement showed that nine of 31 callus lines obtained from 6 days of colchicine treatment had twice the nuclear DNA content as non-treated controls. Plantlets were regenerated from the calli with twice the nuclear DNA content. Microscopic observation of root tip cells showed that their somatic chromosome number was 2n=180 (x=15). Compared with Jiro , dodecaploid plants had longer stomatal guard cells and lower stomatal densities, consistent with increased ploidy. |
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Keywords: | Chromosome doubling Colchiploid Flow cytometry Ploidy level Woody plant |
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