Departamento de Biologia, Universidade Federal, do Piauí, Campus Profa. Cinobelina Elvas, BR 135, CEP.: 64900-000, Bom Jesus, Piauí, Brazil.
Environ Monit Assess. 2011 Sep;180(1-4):31-9. doi: 10.1007/s10661-010-1770-3. Epub 2010 Nov 11.
Due to the current exploitation and consequent extinction of native medicinal plants around the world, new strategies have been proposed to address the sustainable use of this resource. Accordingly, the goal of this study is to assess the speed of bark regeneration of Myracrodruon urundeuva Allemão and to compare the tannin content before and after tissue regeneration. Twenty individuals from an area of Caatinga in Caruaru, Pernambuco State (NE Brazil), were selected. To evaluate the speed of bark regeneration, four treatments were established, according to the area of bark removed (10 × 2, 6 × 5, 8 × 5 and 10 × 5 cm), with five replicates (five individuals of M. urundeuva Allemão) and three treatments of tannin content (bark removed before damage, as regenerated tissue, and non-impacted bark or control). At the end of 23 months of monitoring the regeneration, we found that only seven of the 20 individuals analyzed did not fully heal. No significant correlation between the monthly percent regeneration and average monthly precipitation was found. The tannin content varied according to the quantified tissue (after damage, regenerated and control) as well as between damage classes (20 cm(2)-41.64 to 63.53 mg; 30 cm(2)-49.25 to 67.54 mg; 40 cm(2)-31.69 to 67.44 mg; 50 cm(2)-34.08 to 48.53 mg). Despite the variations found, there was no significant difference between the measurement periods (p > 0.05) or damage classes (p > 0.05). The results showed that the regeneration rate was higher in individuals belonging to the 10 × 2 and 10 × 5 cm groups and that there is no correlation between precipitation and regeneration speed. Tannin levels did not vary significantly in the tissues before damage and after regeneration.
由于目前世界各地对药用植物的开发利用导致其灭绝，因此提出了新的策略来解决这种资源的可持续利用问题。因此，本研究的目的是评估 Myracrodruon urundeuva Allemão 的树皮再生速度，并比较组织再生前后的单宁含量。在巴西东北部伯南布哥州的卡鲁阿鲁（Caruaru）的一个卡廷加（Caatinga）地区选择了 20 株个体。为了评估树皮再生速度，根据去除的树皮面积（10×2、6×5、8×5 和 10×5cm）建立了 4 种处理方法，每种处理有 5 个重复（5 株 M. urundeuva Allemão）和 3 种单宁含量处理（损伤前的树皮、再生组织和未受影响的树皮或对照）。在监测再生的 23 个月后，我们发现只有 20 株个体中的 7 株未完全愈合。每月再生百分比与平均月降水量之间没有发现显著相关性。单宁含量根据量化组织（损伤后、再生和对照）以及损伤程度（20cm²-41.64 至 63.53mg；30cm²-49.25 至 67.54mg；40cm²-31.69 至 67.44mg；50cm²-34.08 至 48.53mg）而有所不同。尽管存在差异，但在测量期间（p＞0.05）或损伤程度（p＞0.05）之间没有显著差异。结果表明，10×2 和 10×5cm 组个体的再生速度较高，降水与再生速度之间没有相关性。损伤前和再生后的组织中，单宁含量没有显著差异。
