野生黄精离体快繁技术体系的优化
2021-08-04曾文丹曹升尚小红陆柳英肖亮严华兵
曾文丹 曹升 尚小红 陆柳英 肖亮 严华兵



摘 要:以野生黄精不定芽为材料,以MS为基本培养基,添加不同浓度的植物生长调节剂6-BA、2,4-D、NAA、KT进行3因素4水平的正交设计试验,筛选黄精增殖的最佳培养条件;探讨不同培养温度对黄精组培苗继代增殖的影响;以1/2 MS为基本培养基,探讨不同生长素及其浓度和不同培养容器对组培苗生根的影响。结果表明,黄精组培苗最佳继代增殖培养基为MS + 2.0 mg/L 6-BA + 0.2 mg/L 2,4-D + 0.4 mg/L NAA,最佳培养温度为22 ℃,平均繁殖系数达6.88;最佳生根培养基为1/2 MS + 0.5 mg/L NAA + 0.2 mg/L IBA,平均生根率達96.2%;接种袋是黄精工厂化育苗的首选生根培养容器。
关键词:黄精;离体快繁;丛生芽
中图分类号:S567.23 文献标识码:A
Optimization of Rapid Propagation Technology of Polygonatum
sibiricum
ZENG Wendan1,2, CAO Sheng1, SHANG Xiaohong1, LU Liuying1, XIAO Liang1, YAN Huabing1
1. Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China; 2. Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Nanning, Guangxi 530007, China
Abstract: In order to establish the optimum culture condition of Polygonatum sibiricum, the adventitious buds were used as the explants and MS as the basic medium to study the effects of different culture temperature and plant growth regulators (6-BA, 2,4-D, NAA, KT) with an orthogonal experimental design L9 (34) on multiplication and plant regeneration in vitro. 1/2 MS was used as the basic medium to study the effects of different plant growth regulators and culture vessel on rooting of tissue cultured plantlets. The optimal multiplication medium was MS + 2.0 mg/L 6-BA + 0.2 mg/L 2,4-D + 0.4 mg/L NAA. The optimal culture temperature was 22 ℃ and the average proliferation coefficient reached 6.88. The optimal rooting medium was 1/2 MS + 0.5 mg/L NAA + 0.2 mg/L IBA, and the average frequency of shoot rooting reached 96.2%. Inoculation bag was the first choice culture vessel for large-scale production of P. sibiricum.
Keywords: Polygonatum sibiricum; rapid propagation; multiple shoots
DOI: 10.3969/j.issn.1000-2561.2021.06.011
黄精(Polygonatum sibiricum)为百合科黄精属多年生草本植物,具有补中益气、益肾填精、滋阴润肺,生津补脾之功效[1-2]。目前黄精的主要繁殖方式为根茎繁殖和种子繁殖。但根茎繁殖方法不仅用种量大,且繁殖系数低;种子繁殖方法虽繁殖系数较高,但成苗时间久,一般种子繁殖移栽苗需3年时间。组织培养技术具有繁殖系数高、不受外界环境条件限制等特点,因此,利用植物组织培养技术建立黄精组培苗规模化生产技术体系是生产优质黄精种苗的有效途径。近年来,有关黄精离体快繁技术已开展部分研究。周新华等[3]利用均匀设计及其分析方法筛选出黄精不定芽增殖的最佳激素组合为1.49 mg/L KT和0.29 mg/L NAA;吕煜梦等[4]研究发现4.0 mg/L 6-BA和0.2 mg/L NAA激素组合对三明野生黄精不定芽的诱导效果最佳;张瑜等[5]认为低浓度的TDZ对不定芽的诱导和生长有促进作用;徐红梅等[6]研究发现TDZ虽有利于多花黄精愈伤组织的分化,但对分化芽的进一步生长有抑制作用,易形成叶片变厚和不规则弯曲的变态叶。……
