乙烯在Ⅰ-69杨茎插穗不定根形成中的作用  

EFFECT OF ETHYLENE ON ADVENTITIOUS ROOT INITIATION OF I-69 POPLAR STEM CUTTINGS

作　　者：郑均宝[1] 刘玉军[1] 裴保华[1] 

机构地区：[1]河北林学院,保定071000

出　　处：《林业科学》1993年第1期19-24,共6页Scientia Silvae Sinicae

基　　金：国家自然科学基金

摘　　要：以I-69杨嫩枝、半硬枝和一年生硬枝为试验材料,研究了乙烯在茎插穗不定根形成中的作用。生长素类物质处理可诱导乙烯释放,在扦插生根的整个过程中,乙烯释放量均比对照高,同时促进不定根形成。而用GA_3、ABA和KT处理,乙烯释放量均与对照相同,它们不促进,甚至抑制或强烈抑制不定根形成。用浓度为25μg·ml^(-1)-1000μg·ml^(-1)的乙烯气体处理,均能促进I-69杨硬枝插穗不定根形成和芽的萌发。乙烯利处理,低浓度(小于25μg·ml^(-1))促进,随浓度提高从无促进到抑制。高浓度乙烯利、IBA和NAA处理插穗其形态变化相似。试验结果认为乙烯对I-69杨插穗不定根形成的作用与生长素相类似,低浓度促进,高浓度抑制。This paper studied the effect of ethylene on adventitious root initiation ofstem cuttings with the experiment materials of shoot, semi-hardwood and one-year-old hardwood of I-69 Poplar. Auxins treatments could induce the cuttingsto release ethylene, and the amount of ethylene released from cuttings tre-ated with auxins was higher than that from cuttings without auxins treatment(CK) during the whole process of cutting and rooting, meanwhile the ethylenestimulated the initiation of adventitious root. But the amount of ethylene rele-ased from cuttings treated with GA_3 ABA, and KT was egual to that from CKtreatment, which did not stimulate, even inhibited or intensely inhibited theadventitious root initiation. The treatment with ethylene gas at a concentrationof 25-1000ug·ml^(-1) could stimulate the adventitious root initiation and buddingof I-69 Poplar hardwood cuttings. The initiation of adventitious roots could bepromoted in treatment with ethrel at a low concentration(<25ug·ml(-1)), whichcould be reduced and inhibited as the concentration of ethrel increased Theamount of ethylene released from cuttings increased magnificently when cuttingstreated with a high concentration of ethrel. The morphological changes ofcuttings treated with high concentrations of ethrel, ABA, and NAA were si-milar. In all of experimental results, the effect of ethylene on the initiationof adventitious roots of I-69 Poplar cuttings is similar to that of auxins, whichis stimulated at low concentration and inhibited at high concentration. Theseeffects on adventitious root initiation are related to the production of ethylenedirectly as a result of their cooperation.

关 键 词：乙烯 不定根形成 I-69杨 杨树 

分 类 号：S792.110.1[农业科学—林木遗传育种]