Low temperature,IBA concentrations and optimal time for adventitious rooting of Eucalyptus benthamii mini-cuttings

查看全文 作　　者：Gilvano Ebling [1]Brondani;Francisco JoséBenedini [2]Baccarin;Heron Wilhelmus de Wit [3]Ondas;JoséLuiz [4]Stape;Antonio Natal [2]Gonçalves;Marcilio de [3]Almeida

机构地区：[1]Department of Forest Engineering,Federal University of Mato Grosso(UFMT),Avenida Fernando Corrêa da Costa,2367,ZC 78060-900,Cuiabá,Mato Grosso,Brazil.;[2]Department of Forest Sciences,'Luiz de Queiroz'College of Agriculture,University of S o Paulo(ESALQ/USP),Avenida Pádua Dias,11,POB 9,ZC 13418-900,Piracicaba,So Paulo,Brazil.;[3]Department of Biological Sciences,'Luiz de Queiroz'College of Agriculture,University of S o Paulo(ESALQ/USP),Avenida Pádua Dias,11,POB 9,ZC 13418-900,Piracicaba,So Paulo,Brazil.;[4]Department of Forest and Environmental Sciences,North Carolina State University,NC 27695,USA.

出　　处：《Journal of Forestry Research》索引2012年第23卷第4期,共10页

基　　金：financially by FAPESP (So Paulo Research Foundation,Brazil);CAPES (Coordination for the Improvement of Higher Level Personnel,Brazil) 摘　　要：Eucalyptus benthamii is a forest species of economic interest that has difficulty with seed production and also is considered to have difficulty with adventitious rooting using propagation techniques,such as cutting or mini-cutting.We aimed to assess the adventitious rooting percentage under different storage times in low temperatures and at various IBA(indole-3-butyric acid) concentrations to determine the optimal time of permanence for rooting Eucalyptus benthamii minicuttings in a greenhouse.Shoots collected from mini-stumps cultivated in a semi-hydroponic system were used to obtain the mini-cuttings.For the first experiment,the mini-cuttings were stored at 4℃ for 0(immediate planting),24,48,72,96 and 120 h.The second experiment evaluated the rooting dynamic to determine the optimal time of permanence for minicuttings in a greenhouse.The basal region of the mini-cutting was treated with various IBA solutions:0(free of IBA),1,000,2,000,3,000 and 4,000 mg·L-1.Every seven days(0(immediate planting),7,14,21 and 28 days),destructive sampling of the mini-cuttings was performed to evaluate the histology of the adventitious rooting.Eucalyptus benthamii minicuttings should be rooted immediately after the collection of the shoots.The 2,000 mg·L-1 IBA concentration induced a greater speed and percentage of adventitious rooting,and an interval of 35 to 42 days was indicated for permanence of the mini-cuttings in the greenhouse.Exposure to low temperature induced adventitious root formation with diffuse vascular connections. 关键词：微型扦插最佳时间 BA浓度不定根桉树扦插生根温度存储时间

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Low temperature,IBA concentrations and optimal time for adventitious rooting of Eucalyptus benthamii mini-cuttings

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