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首页> 外文期刊>Australian Journal of Crop Science >Quercetin and indole 3-butyric acid (IBA) as rooting inducers in Eucalyptus grandis × E. urophylla
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Quercetin and indole 3-butyric acid (IBA) as rooting inducers in Eucalyptus grandis × E. urophylla

机译：槲皮素和吲哚3-丁酸（IBA）作为大桉树×尾叶桉的生根诱导剂

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摘要

Vegetative propagation is the main form of Eucalyptus cutting production, but some clones are still difficult to propagate, including rooting. Auxins and co-factors such as flavonoids can improve root development. This study aimed to evaluate the effects of the flavonoid quercetin, either in the presence or absence of auxin, in different rooting stages of E. grandis × E. urophylla, using biochemical markers. Assessments of stem diameter, height, rooting, number of roots and root length were analyzed and the content of polyamines (PAs) (putrescine, spermidine and spermine), ascorbic acid, indole-3-acetic acid (IAA), quercetin and peroxidase activity were determined in leaves and roots. Indole-3-butyric acid (IBA) induced a higher PA content in roots and leaves mainly after 60 days, indicating that auxin can induce PA production and cell division rate, which is higher at this stage of development. The ascorbic acid content was increased in roots by IBA and quercetin increased the ascorbic acid content in roots and leaves, demonstrating the activation of the antioxidant mechanism of cells. A reduction in peroxidase activity following the addition of auxin and quercetin to roots after 90 days indicates a reduction in oxidative stress. Application of IBA induced the highest IAA content in roots. Both the roots and leaves showed detectable levels of quercetin. All treatments promoted changes in biochemical markers at any time-point, indicating that these substances can reduce oxidative stress and increase cell division. Other Eucalyptus clones must be tested to confirm the effect of quercetin and auxin on growth and root development.
机译：营养繁殖是桉树cutting插生产的主要形式，但某些克隆仍然难以繁殖，包括生根。生长素和辅因子如类黄酮可以改善根的发育。这项研究旨在使用生化标记物评估黄酮槲皮素在有或没有植物生长素的情况下，在大肠埃希斯×尾叶埃希菌不同生根阶段的作用。分析茎的直径，高度，生根，根数和根长，评估多胺（PAs）（腐胺，亚精胺和亚精胺），抗坏血酸，吲哚-3-乙酸（IAA），槲皮素和过氧化物酶活性的含量在叶和根中确定。吲哚-3-丁酸（IBA）主要在60天后诱导根和叶中较高的PA含量，表明生长素可以诱导PA产生和细胞分裂速率，在此发育阶段较高。 IBA增加了根中的抗坏血酸含量，槲皮素增加了根和叶中的抗坏血酸含量，证明了细胞抗氧化机制的激活。在90天后向根部添加生长素和槲皮素后，过氧化物酶活性降低，表明氧化应激降低。 IBA的施用在根中诱导出最高的IAA含量。根和叶均显示可检测的槲皮素水平。所有治疗方法均可在任何时间点促进生化标志物的变化，表明这些物质可减少氧化应激并增加细胞分裂。必须测试其他桉树克隆，以确认槲皮素和生长素对生长和根部发育的影响。

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