Abstract | A procedure on cryopreservation of shoot-tips of Eriobotrya japonica Lindl.had been studied in vitro by two steps vitrification. The effects of cold-hardening, preculture, cryoprotecten treatment, thawing and reculture on survival rate of the shoot-tips were tested. Optimal media for shoot-tip induction and propagation were 1/2 MS+1.0 mg·L-1 6-BA+0.5 mg·L-1NAA and MS+0.5 mg·L-16-BA+0.1 mg·L-1 NAA. Preculture for 30 min with 60% PVS2(30% glycerol+15% ethylene glycol+15% DMSO+0.4 mol·L-1 sucrose) and treatment for 50 min by PVS2 were suitable to shoot-tip cryopreservation. After cryopreservation some shoot-tips could regenerate plantlets, the regenerate rate was 46.8%.There was no difference in regenerating plantlets and tube plantlets not stored by cryopreservation.
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关键词 | 枇杷; 茎尖; 超低温保存; 玻璃化法; |
Key words | loquat(Eriobotrya japonica Lindl.); shoot-tip; cryopreservation; vitrification |
作者 | 王家福1,刘月学2,林顺权2 |
所在单位 | 1.福建农林大学园艺学院园艺植物生物工程研究所,福建福州350002; 2.华南农业大学园艺学院,广东广州510642 |
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基金项目 | 国家自然科学基金资助项目(39970528); |