Seasonal effects and antifungal activity from bark chemical constituents of Sterculia apetala (Malvaceae) at Pantanal of Miranda, Mato Grosso do Sul, Brazil
Seasonal effects and antifungal activity from bark chemical constituents of Sterculia apetala (Malvaceae) at Pantanal of Miranda, Mato Grosso do Sul, Brazil
复制标题
DOI：
10.1590/1809-4392201500011
复制
发表时间：
2015-09-01
期刊：
影响因子：
0.8
通讯作者：
GUEDES, Neiva Maria Robaldo
中科院分区：
文献类型：
--
作者：
FONTOURA, Fernanda Mussi;MATIAS, Rosemary;GUEDES, Neiva Maria Robaldo
在南潘塔纳尔湿地，濒危物种风信子金刚鹦鹉 (Anodorhynchus hyacinthinus) 经常选择曼杜维树 (Sterculia apetala) 作为筑巢地，因为它的物理特性。此外，木材的化学成分也可能有助于风信子金刚鹦鹉的筑巢选择。本研究的目的是测定两季无瓣花树皮的主要化学成分，并评价其杀菌潜力。 2012 年 1 月（雨季）和 8 月（旱季）采集了有和没有 A. hyacinthinus 巢的 S. apetala 树的树皮样本。使用植物化学分析评估了有和没有巢的树样本对菌丝生长 (MGI) 的抑制作用，以评估它们对木霉菌的抗真菌活性。植物化学分析证实了酚类化合物和类黄酮的存在。在这两个季节，从嵌套树木中采集的样品的总酚含量高于从非嵌套树木中采集的样品。有巢样品的总黄酮平均含量在1月份较高，无巢样品在8月份较高。所有选定的样本均显示出抗真菌活性，其中在 8 月（紫蓝金刚鹦鹉繁殖高峰期）采集的巢样本的 MGI 为 51.3%。因此，这个百分比与黄酮类化合物的含量和香豆素的存在有关，可能会影响该地区紫蓝金刚鹦鹉和其他鸟类的繁殖成功率。这是第一份关于无瓣花茎皮的化学研究报告。
In the Southern Pantanal, the hyacinth macaw (Anodorhynchus hyacinthinus), an endangered species, often chooses the manduvi tree (Sterculia apetala) as a nesting site, because of its physical properties. In addition, the chemical composition of the wood may also contribute to a nesting selection by the hyacinth macaws. The objective of this study was to determine the main chemical components of S. apetala bark for two seasons, and evaluate its fungicidal potential. Bark samples from S. apetala trees with and without nests of A. hyacinthinus were collected in January (wet season) and August (dry season) of 2012. The inhibition of mycelium growth (MGI) from tree samples with and without nests were assessed using a phytochemical analysis to evaluate their antifungal activity against Trichoderma sp. Phytochemical analysis confirmed the presence of phenolic compounds and flavonoids. In both seasons, samples obtained from nested trees had higher content of total phenols than those collected from non-nested trees. The average content of total flavonoids was higher in January for samples with nest and in August for samples without nest. All selected samples showed antifungal activity, and those with nest collected in August (peak of hyacinth macaw breeding) resulted in an MGI of 51.3%. Therefore, this percentage, related to the content of flavonoids and the presence of coumarins, may influence the reproductive success of hyacinth macaws and other species of birds, in this region. This is the first chemical study report with the stem bark of S. apetala.