Julia A Romão, Êuder R Dias, Matheus Nolasco, Lilian Boccardo, Luiz Marcelo R Tomé, Aristóteles Góes Neto, Ivo José C Vieira, Raimundo Braz-Filho, Alexsandro Branco
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引用次数: 0
摘要
倍足类是陆生节肢动物,对陆地生态系统的动态变化非常重要。其原因之一可能是它们的防御性分泌物导致捕食率较低。因此,研究人员对巴西东北部特有的 Orthoporus fuscipes(属于该类的一个物种)的种群结构和防御性分泌物的化学成分进行了调查。种群结构显示,雌性比雄性体型大、质量高,雌雄之间呈负异速增长。利用二氧化硅开柱色谱法对防御性分泌物的正己烷提取物进行分馏,并对可能的馏分进行气相色谱-质谱分析,以确定主要的脂肪酸甲酯、次要的烷烃、烯烃和脂肪酸衍生物,以及已知的醌类化合物 2-甲氧基-3-甲基对苯二酚、2-甲氧基-3-甲基-1,4-苯醌、2,3-二甲氧基-1,4-苯醌和 2,3-二甲氧基对苯二酚。此外,还首次保存了该物种的细胞色素氧化酶 I 序列。
Orthoporus fuscipes (PORAT, 1888) (Juliformia; Spirostreptidae): population structure and defensive secretion chemical analysis.
Diplopods are terrestrial arthropods important for the dynamics of terrestrial ecosystems. One of the reasons for that can be their low predation rate due to their defensive secretion. Thus, Orthoporus fuscipes, a species belonging to this group and endemic to northeastern Brazil, was investigated as to its population structure and chemical constituents of defensive secretion. The population structure showed that females are larger and have greater mass than do males, along with negative allometric growth between males and females. The defensive secretion hexane extract was submitted to fractionation using SiO2 open-column chromatography and the gas chromatographic coupled to mass spectrometric analysis was applied in the fraction possibilities to identify major fatty acid methyl esthers, along with minor alkanes, alkenes and fatty acids derivatives and the known quinoids 2-methoxy-3-methylhydroquinone, 2-methoxy-3-methyl-1,4-benzoquinone, 2,3-dimethoxy-1,4-benzoquinone and 2,3-dimethoxyhydroquinone. In addition, the cytochrome oxidase I sequence for the species was deposited for the first time.
期刊介绍:
The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence.
Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.