中华补血草的组织培养和植株再生体系优化
2016-01-29卢兴霞骆建霞任志雨孙世海柴慈江
卢兴霞+骆建霞+任志雨+孙世海+柴慈江



摘 要:为进行中华补血草优良品种的保存和培育,为从分子水平进行泌盐植物耐盐机理研究奠定基础,本研究以中华补血草无菌苗叶片为外植体,对中华补血草的组织培养和再生体系进行了优化。结果表明,以MS + 6-BA 0.1 mg·L-1+ NAA 0.2 mg·L-1培养基为愈伤组织诱导最佳培养基,愈伤组织诱导率为100%;以MS + 6-BA 1.5 mg·L-1+ NAA 0.2 mg·L-1为丛生芽诱导最佳培养基,诱导率为99.06%;丛生芽继代培养适宜的培养基为MS + NAA 0.2 mg·L-1 + 6-BA 0.15 mg·L-1;以MS + NAA 0.2 mg·L-1培养基为最佳生根率培养基,生根率为87%,且根系生长良好。
关键词:中华补血草;组织培养;植株再生
中图分类号:Q945 文献标识码:A DOI 编码:10.3969/j.issn.1006-6500.2016.01.006
Optimized System of Tissue Culture and Plant Regeneration of Limonium sinense
LU Xingxia, LUO Jianxia, REN Zhiyu, SUN Shihai, CHAI Cijiang
(College of Horticulture and Landscape, Tianjin Agricultural College, Tianjin 300384, China)
Abstract: In order to save and breed new varieties, and to lay the foundation for studying salt tolerance mechanism of salt secreting plant by molecular techniques, tissue culture and plant regeneration of Limonium sinensewere were optimized with the leaf explants of sterile seedlings. The results showed that the optimal medium inducing the callus was MS + 6-BA 0.1 mg·L-1+ NAA 0.2 mg·L-1, the inducing ratio was 100%; the optimal medium of regeneration buds was MS + 6-BA 1.5 mg·L-1+ NAA 0.2 mg·L-1, the regeneration ratio was 99.06%; the MS medium containing NAA 0.2 mg·L-1and 6-BA 0.15 mg·L-1 was optimal subculture medium;the MS medium containing NAA 0.2 mg·L-1 was the optimal medium of rooting, the rooting ratio was 87%, and the roots could have vigorous growth.
Key words: Limonium sinense(Girard) Kuntze; tissue culture; plant regeneration
中华补血草[Limonium sinense(Girard) Kuntze]又名匙叶草、海金花,为蓝雪科(Plumbaginaceae)补血草属的多年生草本植物,是典型的泌盐植物,具有盐腺和盐囊泡等结构,可以将体内多余盐分排出体外,使盐碱地脱盐,改善盐碱地土壤环境,被誉为改造盐碱地的“先锋植物”[1-2]。其花萼膜质,花后宿存,形态似“梅”,被誉为干支梅,是插花中人们尤为钟爱的填充花材。中华补血草根或全草均可入药,具有清热解毒、祛风消炎、活血止血、调经的功效,用于感冒、失血以及月经过多等症状,也有抗衰老、抗癌等功效,具有较高的药用价值[3-4]。目前,中华补血草以野生为主,且主要以播种方式进行繁殖,致使后代发生严重变异。建立中华补血草组织培养及再生体系,既有利于中华补血草优良品种的保存及培育,也可以为从分子水平进行泌盐植物耐盐机理研究奠定基础。本研究以中华补血草无菌苗叶片为外植体,在前期组培工作的基础上,对中华补血草的组织培养和再生体系进行进一步优化。……
