植物研究 ›› 2023, Vol. 43 ›› Issue (5): 667-678.doi: 10.7525/j.issn.1673-5102.2023.05.004
收稿日期:
2023-01-21
出版日期:
2023-09-20
发布日期:
2023-09-05
通讯作者:
李爽
E-mail:shuangli@nefu.edu.cn
作者简介:
何旭(1998—),男,硕士研究生,主要从事林木遗传育种方面的研究
基金资助:
Xu HE, Yuan GAO, Qunye ZHANG, Chenguang ZHOU, Wei LI, Shuang LI()
Received:
2023-01-21
Online:
2023-09-20
Published:
2023-09-05
Contact:
Shuang LI
E-mail:shuangli@nefu.edu.cn
About author:
E-mail:shuangli@nefu.edu.cnSupported by:
摘要:
以白城小黑杨(Populus simonii×P. nigra ‘Baicheng’)组培苗茎段为外植体,MS为基本培养基,通过调节不同植物生长激素6-BA、NAA、TDZ和IBA浓度诱导其离体再生。基于组织培养系统,经过卡那霉素浓度筛选、侵染时间确定,最终建立适用于白城小黑杨的农杆菌(Agrobacterium tumefaciens)介导的遗传转化体系。利用该系统成功创制了杨树应拉木形成关键调控基因LBD39(Lateral Organ Boundaries Domain)的过量表达转基因植株。结果表明:白城小黑杨组织培养体系包括不定芽分化诱导、抽茎诱导、生根诱导3个阶段,不定芽分化诱导最适培养基为MS+0.5 mg·L-1 6-BA+0.1 mg·L-1 NAA+0.001 mg·L-1 TDZ,分化率92.6%;抽茎诱导最适培养基为MS+0.2 mg·L-1 6-BA+0.05 mg·L-1 NAA,抽茎增值系数6.5;生根诱导最适培养基为1/2 MS+0.4 mg·L-1 IBA,生根率100%。遗传转化最适卡那霉素质量浓度为30 mg·L-1、最佳侵染时间为20 min,经30 d不定芽诱导、15~30 d抽茎诱导、25 d生根诱导即可成功获得转基因植株,GUS基因的转化效率为2%。应用此遗传转化体系,对杨树应拉木关键调控基因LBD39进行了过表达植株创制,最终获得5株过表达植株,转化效率为3.3%。
中图分类号:
何旭, 高源, 张群野, 周晨光, 李伟, 李爽. 白城小黑杨遗传转化体系建立及其应用[J]. 植物研究, 2023, 43(5): 667-678.
Xu HE, Yuan GAO, Qunye ZHANG, Chenguang ZHOU, Wei LI, Shuang LI. Establishment and Application of Genetic Transformation System for Populus simonii×P. nigra ‘Baicheng’[J]. Bulletin of Botanical Research, 2023, 43(5): 667-678.
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