title: [Effects of growth regulators and growth media on root-hair development of Poncirus trifoliate].
abstract: 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 micromol x L(-1) of IBA and ETH notablypromoted root-hair development. The phosphorous deficiency in sand culture induced more roothair formation (636.3 per tap root). Mixed soil culture produced lesser root-hairs (212.3 per taproot), and all the test growth regulators had no obvious effects on the root-hair development.
authors.affiliation: Ministry of Education Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, China. zhangdejian0551@webmail.hzau.edu.cn
authors.forename: De-Jian
authors.initials: DJ
authors.lastname: Zhang
authors.forename: Ren-Xue
authors.initials: RX
authors.lastname: Xia
authors.forename: Xiu
authors.initials: X
authors.lastname: Cao
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Shu
mesh_terms: D010937:Plant Growth Regulators / Q000494:pharmacology*; D018517:Plant Roots / Q000254:growth & development*; D032104:Poncirus / Q000254:growth & development*; D036226:Seedlings / Q000254:growth & development*; D012822:Silicon Dioxide
chemical_list: D010937:Plant Growth Regulators; D012822:Silicon Dioxide