摘要
为建立高效的野葛(Puerarialobata)毛状根遗传转化体系,以野葛组培苗为外植体,探讨不同因素对野葛毛状根遗传转化效率的影响。结果表明,基因型是建立野葛毛状根高效遗传转化体系的主要限制因子;发根农杆菌K599为最适宜的菌株;以培养5–13代组培苗继代培养8天、第1–2节位刚展开的幼嫩叶片为最佳外植体材料,预培养3天,菌液侵染15分钟,毛状根诱导率最高,可达22.4%。野葛毛状根继代增殖的最佳培养基类型为固体培养基,其毛状根鲜重是液体培养基中毛状根鲜重的75倍;PCR检测和荧光显微观察结果显示,GFP及rolB基因在野葛毛状根基因组中稳定表达,共转化率为80%。研究初步建立了发根农杆菌介导的野葛毛状根遗传转化体系,旨在为野葛基因功能研究奠定基础。
INTRODUCTION:An efficient Agrobacterium rhizogenes-mediated transformation system for Pueraria lobata was established.RATIONALE:In this study,tissue-cultured plantlets of P.lobata were used as explants to investigate the effects of different genotypes,A.rhizogenes strains,explants,precultivation times,infection times,culture days,subculture times,and culture methods on the efficiency of hairy root genetic transformation in P.lobata.RESULTS:The results indicated that the induction rate of hairy root formation was the highest when the immature leaves of YG-19 were used as the explant material,reaching 10.2%.A.rhizogenes K599 was identified as the most suitable strain.The optimal explant material was immature leaves that had just unfolded from the first to second nodes of the 5th to 13th generation tissue culture plantlets subcultured for 8 days.After 3 days of pre-culture and 15 minutes of bacterial infection,the highest induction rate of hairy roots reached 22.4%.The optimal type of culture medium for the proliferation of hairy roots in P.lobata was solid medium culture,and the fresh weight of hairy roots grown on solid medium was 75 times greater than that of hairy roots grown in liquid medium.PCR detection and fluorescence microscopy assays revealed that the expression of GFP and rolB genes in the hairy roots of P.lobata was stable,and the rate of cotransformation was 80%.CONCLUSION:Genotype,A.rhizogenes strain,and culture duration were the most critical factors for the efficient genetic transformation of hairy roots in P.lobata.
作者
曾文丹
严华兵
吴正丹
尚小红
曹升
陆柳
英肖亮
施平丽
程冬
龙紫媛
李婕宇
Wendan Zeng;Huabing Yan;Zhengdan Wu;Xiaohong Shang;Sheng Cao;Liuying LuLiang Xiao;Pingli Shi;Dong Cheng;Ziyuan Long;Jieyu Li(Cash Crops Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007,China;Guangxi University,Nanning 530004,China)
出处
《植物学报》
北大核心
2025年第3期425-434,共10页
Chinese Bulletin of Botany
基金
广西自然科学基金(No.2023GXNSFBA026297)
广西科技重大专项(No.桂科AA23023035)
广西科技计划(No.桂科AB22080090)
广西薯类创新团队(No.nycytxgxcxtd-2023-11)
科技先锋队(No.桂农科盟202414)。
关键词
野葛
发根农杆菌
毛状根
遗传转化
Pueraria lobata
Agrobacterium rhizogenes
hairy roots
genetic transformation
作者简介
通讯作者:严华兵,男,1979年5月生,博士。现任广西农业科学院经济作物研究所所长,兼任广西薯类创新团队首席专家、国家食药同源产业科技创新联盟葛根专委会主任委员,荣获第八批广西“十百千”知识产权领军人才。其科研团队主要从事木薯、葛根等特色薯类植物资源收集、生物技术育种、良种繁育、高效栽培以及资源开发利用等研究工作。先后主持IAEA国际合作项目、国家重点研发计划子课题、国家自然科学基金、自治区主席科技资金等农业科研项目20余项。科研成果获得广西科技进步二等奖1项、广西科技进步三等奖2项。带领团队育成“桂木薯6号”等木薯新品种5个。以第一完成人获得国家发明专利10余项。以第一作者或通讯作者在Horticulture Research、DNA Research和植物生理学报等专业刊物上发表论文90余篇,其中国际刊物20余篇。主编专著2部,作为副主编合编著作2部,E-mail:h.b.yan@hotmail.com。
