高级检索+

岷江百合花器官离体再生体系的建立

Establishment of in vitro Regeneration System of Lilium regale Wilson From Flower Organs

  • 摘要: 以岷江百合(Lilium regale Wilson)为试材,采用花丝、花柱、子房为外植体进行组织培养,研究不定芽或愈伤组织诱导、愈伤组织继代、小鳞茎膨大及生根以及试管苗的炼苗移栽,以期为建立岷江百合花器官的组培快繁技术提供参考依据。结果表明:3种花器官外植体诱导能力存在差异,由易到难依次为花丝>花柱>子房,发生褐化程度也存在差异,其中花丝最易发生褐化,而子房则极不易发生褐化;不同外植体的最适诱导培养基不同,花丝最适诱导培养基为MS+BA 1.0 mg·L-1+NAA 0.5 mg·L-1,总诱导率高达91%;花柱诱导最佳培养基为MS+2,4-D 1.0 mg·L-1+KT 0.1 mg·L-1,总诱导率为63%左右;子房诱导最佳培养基为MS+2,4-D 2.0 mg·L-1+KT 0.05 mg·L-1,总诱导率为52%;花器官诱导过程中主要产生2种愈伤组织,BA与NAA诱导主要获得绿色、致密、坚硬的愈伤组织,经石蜡切片鉴定为非胚性愈伤组织,而2,4-D与KT诱导主要获得黄色、疏松、颗粒状的愈伤组织,石蜡切片鉴定为胚性愈伤组织;对胚性愈伤组织进行继代培养,愈伤组织最适继代培养基为MS+PIC 1.0 mg·L-1+NAA 0.2 mg·L-1;小鳞茎膨大及生根最适培养基为MS+90 g·L-1蔗糖;鳞茎越大(直径>10 mm),移栽成活率越高(90%),植株长势越好。

     

    Abstract: Lilium regale Wilson was used as the test material, the filaments, styles and ovules were used as explants for tissue culture.Adventitious bud or callus induction, callus subculture, bulb expansion and rooting, and seedling training and transplanting of test tube plantlets were studied in order to provide reference for the establishment on the tissue culture and rapid propagation technology of flower organs of Lilium regale Wilson.The results showed that the induction ability of explants of three flower organs was different, the order of induction ability from easy to difficult was filament>style>ovary.Filaments were the most prone to browning, while ovaries were the least prone to browning.The optimal medium of different explants was different.The most suitable medium for filament explants was MS+BA 1.0 mg·L-1+NAA 0.5 mg·L-1 with the highest induction rate reaching 91%,the best medium for style induction was MS+2,4-D 1.0 mg·L-1+KT 0.1 mg·L-1,showing 63% induction rate.Two kinds of callus were produced in the process of flower organ induction, and the best explants for ovary induction was MS+2,4-D 2.0 mg·L-1+KT 0.05 mg·L-1,with 52% induction rate.BA and NAA were mainly induced to produce green, dense and hard callus, which were identified as non-embryonic callus by paraffin section; 2,4-D and KT were mainly induced to produce yellow, loose and granular callus, which were identified as embryonic by paraffin section.The embryo callus was subcultured, the most suitable subculture medium was MS+PIC 1.0 mg·L-1+NAA 0.2 mg·L-1;while the most suitable medium for small scale stem enlargement and rooting was MS+90 g·L-1 sucrose; the larger the bulb(>10 mm),the higher the transplant survival rate(90%),the better the plant growth.

     

/

返回文章
返回