火龙珠种子无菌萌发研究

2021-12-18 15:24:22李晓亮杨世先杨进成王刚张钟陈佳清周翠英左丽娟邓成忠张玉荣段永华
安徽农业科学 2021年23期

李晓亮 杨世先 杨进成 王刚 张钟 陈佳清 周翠英 左丽娟 邓成忠 张玉荣 段永华

摘要 [目的]建立火龙珠种子的无菌苗技术体系,为火龙珠的种苗快繁、种质保存、遗传转化及杂交实生苗获得等提供可行的技术途径。[方法]选择和采集4种不同大小的火龙珠果实进行灭菌、无菌播种和种子培养试验,调查记录种子的萌发情况。[结果]火龙珠果实的适宜灭菌方法是0.20% HgCl2灭菌8~16 min;火龙珠不同种子的无菌萌发差异明显,相比其他3类果实的种子,最大横径为(11.19±0.21) mm、单果重(0.66±0.02) g的果实内种子发芽起始时间较早(30 d后),发芽持续时间较长(60 d),萌发频率较高(100%),发芽率较大(7.81±0.50)%,种子萌发形成的幼苗株高、叶片数、节间距、节段数、增殖系数等较大,幼苗生长势较强,是火龙珠无菌苗获得的适宜果实。[结论]通过选择合适的火龙珠果实进行种子无菌播种,可以建立火龙珠高效的无菌苗技术体系,且是一个重要的途径。

关键词 火龙珠;果实;种子;组织培养;无菌萌发

中图分类号 S 686  文献标识码 A  文章编号 0517-6611(2021)23-0140-03

doi:10.3969/j.issn.0517-6611.2021.23.038

Study on Seed Aseptic Germination of Hypericum

LI Xiao-liang, YANG Shi-xian, YANG Jin-cheng et al

(Yuxi Academy of Agricultural Sciences, Yuxi, Yunnan 653100)

Abstract [Objective]To establish the aseptic seedling technical system of Hypericum by its seeds, in turn to provide one feasible technical approach for rapid propagation of seedling, germplasm conservation, genetic transformation, and hybrid seedling, etc.[Method] 4 different types fruits of Hypericum were selected and gathered to carry out experiments of sterilization, aseptic seed sowing and seed culture.[Result] The results showed that a suitable approach for fruits of Hypericum was to treat 8-16 min by 0.20% HgCl2, and there was a great difference in different seeds aseptic germination of Hypericum. Compared with seeds in the other 3 kinds of fruits, fruits containing maximum diameter of (11.19±0.21)mm and single fruit weight of (0.66±0.02) g were suitable fruits for obtaining aseptic seedling of Hypericum, because its seed had earlier (30 d after aseptic seed sowing) and last for 60 d of seed germination, higher germination frequency of 100%, higher germination rate of (7.81±0.50)%, higher indexes of seedlings height, leaf number, knot spacing, sections and proliferation coefficients, and stronger seedling growth vigour.[Conclusion] It is the seed aseptic germination of these suitable Hypericum fruits that establish  an efficient aseptic seedling technical system of Hypericum, which is an important approach.

Key words Hypericum;Fruit;Seed;Tissue culture;Aseptic germination

基金項目 玉溪市农业科学院科研项目“作物组培扩繁及配套栽培技术研究与应用”(YXNKYZP2020)。

作者简介 李晓亮(1982—),男,云南江川人,高级农艺师,硕士,从事植物(作物)组织培养技术研究与应用、果蔬作物的育种及栽培等。通信作者,高级农艺师,从事果蔬作物育种及栽培研究。

收稿日期 2021-07-19

种子是种子植物特有的器官,繁殖是其主要功能,这对于延续物种起着至关重要的作用。利用植物组织培养技术(简称“组培”)进行种子的培养,可以快速繁殖种苗,打破种子休眠以促进其萌发,解决作物杂交胚胎败育及繁育作物杂交的后代等具有重要意义[1]。……

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