欧美杨108离体叶片和茎段再生体系的优化

[目的]优化欧美杨108的无性繁殖再生体系的培养条件。[方法]以欧美杨108无菌苗为材料,采用正交试验优化叶片直接分化和茎段愈伤组织分化再生体系的培养条件。[结果]欧美杨108的叶片适宜在光照下进行直接再生分化,茎段适宜在光照下进行愈伤组织诱导再生分化。叶片不定芽分化的培养基为MS基本培养基(琼脂7.00 g/L、pH 6.00、蔗糖20 g/L)附加0.60 mg/L 6-BA和0.20 mg/L NAA;茎段愈伤组织诱导培养基为WPM固体培养基附加0.75 mg/L KT和1.50 mg/L 2,4-D。不定芽诱导生根培养基为WPM固体培养(蔗糖30 g/L)附加2.00 mg/L IBA。[结论]优化了欧美杨108叶片的直接分化再生体系和茎段愈伤组织再生体系的培养条件,为其组织培养及遗传转化体系的构建提供了基础支持。

Optimization of Regeneration System of Leaf and Stem of Populus euramericana 108

[Objective] The aim was to optimize the culture conditions for asexual reproduction system of Populus euramericana 108.[Method] Orthogonal designs were adopted optimize the culture conditions of the regeneration system for direct differentiation from leaves and induced callus from stems of P.euramericana 108 aseptic seeding.[Result] Leaves of P.euramericana 108 directly regenerated and differentiated under illumination,while stem segments preferred to regenerate and differentiate through callus induction under illumination.The differentiation medium of adventitious buds from leaves was MS medium （agar 7.0 g/L,pH 6.0,sucrose 20 g/L） added with 0.6 mg/L 6-BA and 0.2 mg/L NAA; callus induction medium of stem segments was WPM solid medium added with 0.75 mg/L KT and 1.5 mg/L 2,4-D.Rooting induction medium for adventitious buds was WPM solid culture （sucrose 30 g/L） added with 2.0 mg/L IBA.[Conclusion] The culture conditions for regeneration system of differentiation from leaves and induced callus of stems were optimized,which provides basis for the construction of tissue culture and genetic transformation system.