Abstract

The gymnosperms are a taxon of plants that release large amounts of pollen. Some genera of this group are specifically studied because their pollen is known to be the cause of respiratory diseases. The medical interest in allergenic bioaerosol has led to the need for daily aerobiological monitoring. The technique applied involves the use of an instrument that aspirates a volume of air corresponding to human inhalation and the identification under the light microscope of the allergenic bio-particulate present. Morphology alone does not allow to distinguish the non-saccate pollen thus they are attributed to a single category, i.e., Cupressaceae-Taxaceae, without distinction between genera belonging to the different families. This research represents an attempt to overcome the difficulties in the recognition of non-saccate gymnosperm pollen. Twenty-one species belonging to the Araucariaceae, Cupressaceae, and Taxaceae families were selected in Perugia (Umbria, central Italy). The most common species and other less widespread ones were selected, all characterized by non-saccate pollen. The results obtained allowed us to identify four morphologies: aperturoidate, areolate-papillate, areolate-porate, and porate. This study provides further knowledge regarding the morphological characteristics of these pollen grains, in order to overcome the general definition of inaperturates attributed to the pollen of some gymnosperms.

摘要

裸子植物是释放大量花粉的植物的分类单元。对该类的某些属进行了专门研究，因为已知其花粉是引起呼吸系统疾病的原因。变应原性生物气雾剂的医学兴趣导致了对日常空气生物学监测的需求。所应用的技术涉及使用一种仪器，该仪器可吸入相当于人体吸入的一定量的空气，并在光学显微镜下识别存在的变应原性生物微粒。单独的形态学不能区分非不完整的花粉，因此它们被归为一个单一的类别，即柏科-漆科，而没有区分属于不同家族的属。这项研究是试图克服识别不透明裸子植物花粉中的困难的尝试。在佩鲁贾（意大利中部翁布里亚）选择了二十一种属于南洋杉科，柏科和紫杉科的物种。选择了最常见的物种和其他分布较不广泛的物种，所有这些物种的特征都是花粉不透明。所获得的结果使我们能够鉴定出四种形态：无阿魏酸酯，阿魏酸酯，阿魏酸酯和孔酸酯。这项研究提供了有关这些花粉粒形态特征的进一步知识，从而克服了某些裸子植物花粉所致无孔洞的一般定义。所获得的结果使我们能够鉴定出四种形态：无阿魏酸酯，阿魏酸酯，阿魏酸酯和孔酸酯。这项研究提供了有关这些花粉粒形态特征的进一步知识，从而克服了某些裸子植物花粉所致无孔洞的一般定义。所获得的结果使我们能够鉴定出四种形态：无阿魏酸酯，阿魏酸酯，阿魏酸酯和孔酸酯。这项研究提供了有关这些花粉粒形态特征的进一步知识，从而克服了某些裸子植物花粉所致无孔洞的一般定义。