几种生长调节剂对马尾松插穗促根的效应

季孔庶　 王章荣　 陈天华　 王明庥　

摘　要：用生长调节剂处理5年生江西吉安种源马尾松插穗，发现先用S₃₃₀₇后用IBA无效，先用IBA后用S3307使扦插成活率成倍提高，首次以木本植物为材料佐证了植物生长调节剂的阶段性促根作用理论.单独使用时，IBA最适浓度为200mg^.L^-1，S₃₃₀₇最适浓度为100mg^.L^-1.最佳处理为自制的复配调节剂M₁和M₂，M₁和M₂通过提高插穗内源IAA，降低iPA、ABA和GA₁₊₃和内源抑制物??黄酮类MI₃、MI₅、MI₆，减弱IAAO活性，使插穗生根率由对照的34%提高到90%和84%，侧根数、不定根数、最长不定根长和根总长等4个生根性状显著增强，有利于培养无性系壮苗.
关键词：调节剂；马尾松插穗；生根性状；促根效应；无性系壮苗
分类号：S791.248　文献标识码：A
文章编号：1001-389X(2001)02-0120-04

Effects of Root-inducing Regulators in Rooting of Cuttings from Pinus massoniana Lamb.

JI Kong-shu（College of Forest Resources and Environment, Nanjing Forestry Un iversity ，Nanjing 210037, China）　
WANG Zhang-rong（College of Forest Resources and Environment, Nanjing Forestry Un iversity ，Nanjing 210037, China）　
CHEN Tian-huaq（College of Forest Resources and Environment, Nanjing Forestry Un iversity ，Nanjing 210037, China）　
WANG Ming-xiu（College of Forest Resources and Environment, Nanjing Forestry Un iversity ，Nanjing 210037, China）　

Abstract：Root-inducing treatments was used in cuttings from five years old ortets of Pinus massoniana Lamb. from Ji′an in Jiangxi Province. First S₃₃₀₇ later IBA treatments had no effect on raising root r ate. The fittest concentration of IBA was 200 mg^.L^-1 and S₃₃₀₇ was 100 mg^.L^-1. Of all the treatments, regulators M₁ and M₂, compounded by the author, were the best. They could raise the level of endogenous IAA，lo wer the levels of iPA、 ABA、GA₁₊₃ and root inhibitors (MI₃, MI₅ and MI₆, they were all flavoniods), and also weaden the activity of IAA-oxidase (IAAO) .As a result, the root rate was raised from 34 percent (CK) up to 90 and 84 percent respectively. And the sum of adventitious root and branch root, the l ength of the longest root and the total length of the roots, were notabely rais ed.Therefore, strong stecklings of Pinus massoniana Lamb. could be raised .
Keywords：root-inducing regulator; cutting of Pinus ma ssoniana ; rooting trait; root-inducing effect;strong steckling

出版日期：2001年4月1日