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首页> 外文期刊>Plant Growth Regulation >Carbohydrates as regulatory factors on the rooting of Eucalyptus saligna Smith and Eucalyptus globulus Labill
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Carbohydrates as regulatory factors on the rooting of Eucalyptus saligna Smith and Eucalyptus globulus Labill

机译：碳水化合物作为对桉树史密斯和桉树Labill生根的调节因子

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摘要

Comparisons between related species with different rooting capacities can provide insights into the mechanisms controlling adventitious root development. The availability of carbohydrates is often considered exclusively as an energetic requirement to drive root development; the major regulatory role in the process is often attributed to phytohormones, particularly auxin. The roles of light quantity (irradiance) and carbohydrate supply available to young aseptic donor-plants on the adventitious rooting response of Eucalyptus globulus (rooting recalcitrant) and Eucalyptus saligna (easy-to-root) were examined. The effects of the type of carbohydrate supply (sucrose or glucose) on the rooting response of cuttings was also evaluated. Light intensity supplied to mother-plants (30 or 60 μmol m−2 s−1) had limited influence on the rooting response of both species, whereas dark periods were detrimental, particularly for E. globulus. In E. globulus, rooting was promoted by the absence of sucrose in donor-plant media. Presence of sucrose in donor plant medium promoted root number but did not affect rooting percentage of E. saligna. A positive effect of glucose on cutting rhizogenesis was found if this hexose was supplied during the root induction phase, followed by sucrose in the root formation step, especially for E. globulus. The same effect was not seen with fructose. The beneficial effect of glucose in the induction phase on root number was also evident under suboptimal auxin concentrations.
机译：具有不同生根能力的相关物种之间的比较可以为控制不定根发育的机制提供见解。碳水化合物的可利用性通常被认为是驱动根部发育的能量需求。该过程中的主要调节作用通常归因于植物激素，尤其是生长素。考察了光量（辐照度）和碳水化合物供应对年轻的无菌供体植物的影响，对桉树球（生根顽固剂）和粘枝桉树（易生根）的不定根响应。还评估了碳水化合物供应类型（蔗糖或葡萄糖）对插条生根响应的影响。提供给母本的光强度（30或60μmolm-2 s-1 ）对这两个物种的生根响应的影响有限，而黑暗时期则是有害的，尤其是对球形小球藻。在E. globulus中，供体植物培养基中不存在蔗糖可促进生根。供体植物培养基中蔗糖的存在促进了根的数目，但不影响粘枝肠杆菌的生根百分比。如果在根诱导阶段提供了己糖，然后在根形成步骤中加入了蔗糖，尤其是对于球藻，则发现葡萄糖对减少发根有积极作用。果糖未见相同效果。在最佳生长素浓度下，诱导期葡萄糖对根数的有益作用也很明显。

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  • 来源
    《Plant Growth Regulation》 |2005年第1期|63-73|共11页
  • 作者

    Luciano da Rocha Corrêa; Daniel Cristiano Paim; Joséli Schwambach; Arthur Germano Fett-Neto;

  • 作者单位

    Departamento de Botânica Laboratório de Fisiologia Vegetal Programa de Pós-Graduação em Botânica Universidade Federal do Rio Grande do Sul (UFRGS);

    Departamento de Botânica Laboratório de Fisiologia Vegetal Programa de Pós-Graduação em Botânica Universidade Federal do Rio Grande do Sul (UFRGS);

    Centro de Biotecnologia (Programa de Pós-Graduação em Biologia Celular e Molecular) UFRGS;

    Departamento de Botânica Laboratório de Fisiologia Vegetal Programa de Pós-Graduação em Botânica Universidade Federal do Rio Grande do Sul (UFRGS)Centro de Biotecnologia (Programa de Pós-Graduação em Biologia Celular e Molecular) UFRGS;

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  • 正文语种 eng
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  • 关键词

    Carbohydrate; Eucalyptus; Glucose; Irradiance; Propagation; Rooting; Sucrose;

    机译：碳水化合物;桉树;葡萄糖;辐照度;繁殖;生根;蔗糖;

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