生长调节剂和基质对枳根毛发育的影响  

Effects of growth regulators and growth media on root-hair development of Poncirus trifoliate

作　　者：张德健[1] 夏仁学[1] 曹秀[1] 王鹏[1] 舒波[1] 

机构地区：[1]华中农业大学教育部园艺植物生物学重点实验室,武汉430070

出　　处：《应用生态学报》2011年第6期1437-1442,共6页Chinese Journal of Applied Ecology

基　　金：农业部公益性行业科研专项(nyhyzx07-023);科技部星火计划项目(2007EA760023)资助

摘　　要：以干净河沙和混合土为基质,采用不同浓度的吲哚丁酸(IBA)、乙烯利(ETH)、萘乙酸(NAA)处理枳实生苗,研究了枳根毛发育的状况,并在缺磷沙培条件下探讨了枳根毛发育周期及其分布状况.结果表明:枳实生苗根毛凋亡周期约为4 d,呈块状丛生,主要分布在根体,且着生分布不均.沙培条件下枳实生苗发生根毛较多,每条主根约有486.3条根毛,1.0μmol.L-1的IBA和ETH诱导主根发生根毛的效果明显,而NAA无显著作用,缺磷沙培能够诱导更多的根毛发生(每条主根平均636.3条);混合土培养条件下枳实生苗发生根毛较少,每条主根只有212.3条根毛,各生长调节剂对发生根毛的作用效果都不明显.By using river sand and mixed soil as growth media,and treating with different concentration IBA,ETH,and NAA,this paper studied the root-hair development of Poncirus trifoliate seedlings,and the development cycle and distribution pattern of the root-hairs under phosphorus deficiency in sand culture.The root-hairs had a development cycle of about 4 days,and formed block-shaped and clumped,mainly around root,and with uneven distribution.Sand culture gave rise to the production of more root hairs,with an average of 486.3 per tap root,and treating with 1.0 μmol·L-1 of IBA and ETH notably promoted root-hair development.The phosphorous deficiency in sand culture induced more root hair formation（636.3 per tap root）.Mixed soil culture produced lesser root-hairs（212.3 per tap root）,and all the test growth regulators had no obvious effects on the root-hair development.

关 键 词：枳实生苗 根毛 沙培养 混合土培养 缺磷 生长调节剂 

分 类 号：Q945[生物学—植物学]