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Enhanced efficiency of virus eradication following thermotherapy of shoot-tip cultures of pear

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Abstract

In this study, in vitro-cultured plants of Pyrus pyrifolia cv. Fengshui, widely grown in central and southern China, were treated at different temperatures, and the efficiency of virus eradication of regenerated plants was evaluated by ELISA and dot-blot hybridization. Results showed that treatment at a constant high temperature of 37°C influenced greatly on the growth of in vitro pear plants and significantly decreased the plant survival rate, though virus-free plants could be regenerated from a few survived plant tips. When the treatment was carried out at 32°C/night and 38°C/day, the survival rate and growth of pear plants could be significant improved, but no virus-free plants could be regenerated from shoot tips treated for 50 days. Based on these results, infected plants were heat-treated at 42°C/day and 34°C/night. High virus eradication efficiency was achieved from treated cultures of pear for more than 55 days. Results also verified that ACLSV could be eliminated from pear by 5 days shorter treatment period than that for ASGV and ASPV eradication.

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Acknowledgments

This study was financially supported by National Natural Science Foundation of China (grant no: 30370997) and the earmarked fund for Pear Modern Agro-industry Technology Research System. The authors would like to thank Professor Dr. Ch. X. Luo, Huazhong Agricultural University and X. D. Li, Shandong Agricultural University, for critical reading of the manuscript.

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Correspondence to Ni Hong.

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Tan, R., Wang, L., Hong, N. et al. Enhanced efficiency of virus eradication following thermotherapy of shoot-tip cultures of pear. Plant Cell Tiss Organ Cult 101, 229–235 (2010). https://doi.org/10.1007/s11240-010-9681-0

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  • DOI: https://doi.org/10.1007/s11240-010-9681-0

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