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Development of an embryogenic callus induction method for centipede grass (Eremochloa ophiuroides Munro) and subsequent plant regeneration

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Abstract

The present study demonstrates the establishment of embryogenic tissue from seeds and (seedling-derived hypocotyls) shoot base explants derived from seedlings of Eremochloa ophiuroides. The highest percentage of callus induction obtained from seed and young shoot base explants was 52.0% and 66.6% on Murashige and Skoog (MS) basal media supplemented with 9.0 μM and 18.1 µM 2,4-dichlorophenoxyacetic acid (2,4-D), respectively. The type of callus obtained from both types of explants was off-white to yellow in color and non-friable and shiny in texture. Excised callus from the explants was subcultured onto fresh media of the same recipe for further proliferation. After 10–12 d of subculture, a yellow, globular, friable embryogenic callus was obtained from the initial callus. The highest percentage of embryogenic calli obtained at 40.0% was observed on media containing 2.2 µM 2,4-D. The highest regeneration rate of 46.6% was observed on MS media supplemented with 0.4 μM 2,4-D and 2.2 µM benzylaminopurine (BA). Regenerated shoots were rooted in MS basal medium. Plants with well-developed roots were transferred to pots containing a soil mix and acclimatized in greenhouse conditions. Four weeks post-transfer, acclimatized plants showed 100% survival and remained healthy and green. This is the first report of a successful method for induction of somatic embryogenesis with subsequent plant regeneration in centipede grass and demonstrates the establishment of embryogenic callus and efficient plant regeneration with potential application in the development of genetic transformation systems for centipede grass.

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Acknowledgements

This project has been carried out under the Nuclear R&D Program of the Ministry of Science and Technology, Korea.

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Correspondence to Byung Yeoup Chung.

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Editor: Nigel J. Taylor

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Barampuram, S., Chung, B.Y., Lee, S.S. et al. Development of an embryogenic callus induction method for centipede grass (Eremochloa ophiuroides Munro) and subsequent plant regeneration. In Vitro Cell.Dev.Biol.-Plant 45, 155–161 (2009). https://doi.org/10.1007/s11627-009-9199-5

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