茶菊茎尖分生组织高效脱毒再生体系优化
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山西农业大学林学院

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山西省现代农业产业技术体系建设育种岗位专家(2021-11)


Optimization of efficient virus elimination and regeneration system for shoot apical meristem culture of tea Chrysanthemum
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    摘要:

    【目的】筛选适宜热处理时间和脱毒剂,优化茶菊茎尖分生组织高效脱毒再生体系,解决脱毒苗获得率低的问题。【方法】以‘婺源皇菊’、‘金丝皇菊’、‘杭白菊’、‘北京菊’、‘七月雪’、‘乳荷’6个茶菊品种无菌苗为材料,采用昼夜40℃/32℃变温热处理,水杨酸、利巴韦林、脱落酸脱毒剂处理,以及脱毒剂结合热处理等脱毒方法预处理无菌苗,比较其接种茎尖分生组织的出愈率、再生频率和平均再生芽数,及不同处理方法下脱毒效果。【结果】(1)不同品种茶菊茎尖分生组织再生频率差异显著(P<0.05),并以‘婺源皇菊’最高(54.77%),随后依次为‘金丝皇菊’、‘北京菊’、‘七月雪’、‘杭白菊’、‘乳荷’。(2)不同40℃/32℃变温热处理时间下,茶菊茎尖分生组织再生情况差异显著,其中以‘杭白菊’、‘七月雪’茎尖分生组织再生效果最好。(3)化学脱毒剂水杨酸、利巴韦林、脱落酸处理均抑制‘婺源皇菊’茎尖分生组织再生。(4)水杨酸、利巴韦林处理结合变温热处理促进‘婺源皇菊’茎尖分生组织再生,而高浓度脱落酸结合热处理则严重抑制其茎尖分生组织再生,并以10 μmol/L水杨酸结合热处理的效果最好。(5)在热处理、化学脱毒剂结合热处理方法下获得完全脱毒苗。【结论】10 μmol/L水杨酸浓度结合40℃/32℃昼/夜变温预处理40d下能显著提高其茎尖分生组织再生频率,且可获得脱毒苗。

    Abstract:

    [Objective] Screening suitable heat treatment duration and detoxification agents to optimize the efficient virus elimination and regeneration system of tea Chrysanthemum shoot apical meristem, addressing the issue of low rate of obtaining virus-free seedlings. [Methods] Six varieties of tea Chrysanthemum including "WuYuanHuangJu", "JinSiHuangJu", "HangBaiJu", "BeiJingJu", "QiYueXue", and "Ruhe" were used as materials. The axenic seedlings were pre-treated with alternating temperature heat treatment of 40°C/32°C day/night, detoxification agents such as salicylic acid, ribavirin, and abscisic acid, as well as a combination of detoxification agents and heat treatment. The rates of callus induction, regeneration frequency, and average number of regenerated shoots from inoculated shoot apical meristems were compared among different treatment methods, evaluating the detoxification efficacy under various treatments.[Results] (1) There was a significant difference in the regeneration frequency of shoot apical meristems among different varieties of tea Chrysanthemum (P<0.05), with "WuYuanHuangJu" having the highest regeneration frequency of 54.77%, followed by "JinSiHuangJu", "BeiJingJu", "QiYueXue", HangBaiJu and "Ruhe". (2) Under different heat treatment days, the difference in regeneration of shoot apical meristems in tea Chrysanthemum reached a significant level, with "HangBaiJu" and "QiYueXue" showing the best regeneration effect after 40℃/32℃ heat treatment. (3) Salicylic acid, Ribavirin, and Abscisic acid treatments inhibited the regeneration of shoot apical meristems. (4) Salicylic acid and ribavirin treatments combined with heat treatment promoted the regeneration of shoot apical meristems, while high concentration Abscisic acid combined with heat treatment severely inhibited the regeneration of shoot apical meristems. Treatment with 10 μmol/L Salicylic acid combined with heat treatment showed the best regeneration effect on shoot apical meristems. (5) Obtaining completely virus-free seedlings through heat treatment, the combined method of detoxification agents and heat treatment. [Conclusion] The combination of 10 μmol/L salicylic acid concentration with alternating temperature of 40°C/32°C day/night pre-treatment for 40 days significantly enhances the regeneration frequency of shoot apical meristems and results in obtaining virus-free seedlings.

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史子尹,张海楠,李浩,等.茶菊茎尖分生组织高效脱毒再生体系优化[J].西北植物学报,2024,44(10):1557-1566

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  • 收稿日期:2024-03-20
  • 最后修改日期:2024-06-08
  • 录用日期:2024-06-11
  • 在线发布日期: 2024-08-20
  • 出版日期: 2024-10-01
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