不同基质对矮牵牛插穗离体生根的影响  

Effects of different substrates on in vitro rooting of Petunia hybrida

作　　者：王广东[1] 李谦盛[1] 吴震[1] 李慧[1] 

机构地区：[1]南京农业大学园艺学院,江苏南京210095

出　　处：《植物资源与环境学报》2005年第2期35-37,共3页Journal of Plant Resources and Environment

摘　　要：用泥炭、珍珠岩和芦苇末混配的9种基质进行矮牵牛(PetuniahybridaVilm.)离体生根实验研究。结果表明,在泥炭基质上矮牵牛插穗的生根状况较好,3个品种的平均生根率达94.4%,显著高于含苇末的各基质。在泥炭基质上扦插的各品种的主根长和根数基本都高于芦苇末基质。芦苇末基质电导率高达2.77mS·cm-1,不适宜作为扦插基质。基质电导率和插穗生根率的相关性分析表明,矮牵牛扦插基质的电导率应控制在1.5mS·cm-1以下。IAA处理表明,激素对矮牵牛插穗生根影响不明显,基质和水分管理是扦插成功与否的关键。Nine substrates consisted of different percentage of peat, perlite and reed residue were used as in vitro rooting substrate for Petunia hybrida Vilm. The results showed that substrates based on peat were suitable for rooting. The average rooting rate of 3 cultivars in the peat were 94.4%, significantly higher than that of others, and root length, root number were significantly higher than that of reed residue, because the high electronic conductivity (EC) of reed residue caused the water loss of rooting. Relationship between EC of substrate and rooting rate indicated that the EC should be controlled below1.5 mS·cm -1 for rooting of P. hybrida shoot cuttings. Treatment of IAA had no significant effect on rooting, the results could give the conclusion that substrate and water management were the key issues of in vitro rooting of P. hybrida instead of plant growth regulator treatment.

关 键 词：离体生根 矮牵牛 芦苇末基质 扦插基质 插穗生根率 电导率 实验研究 生根状况 水分管理 泥炭 珍珠岩 分析表 相关性 IAA 品种 混配 根数 根长 

分 类 号：S662.9[农业科学—果树学] S681.6[农业科学—园艺学]