Département de Biologie, Campus Universitaire, Tunis, Tunisia.
Antonie Van Leeuwenhoek. 2010 Nov;98(4):429-36. doi: 10.1007/s10482-010-9456-y. Epub 2010 Jun 18.
The molecular phylogeny and comparative morphological studies reported here provide evidence for the recognition of the genus Picoa, an hypogeous desert truffle, in the family Pyronemataceae (Ascomycota, Pezizales). Picoa juniperi and Picoa lefebvrei were reassigned to the genus Picoa based on large subunit (LSU) sequence (28S) rDNA and internal transcribed spacer (ITS) rDNA (including the partial 18S, ITS1, ITS2, 5.8S gene, and partial 28S of the nuclear rDNA) data. Morphological studies of spores, asci, perida, and gleba revealed high similarities between P. lefebvrei and P. juniperi, thereby confirming the membership of both species in the genus Picoa. These two species were primarily distinguishable based on ascospore ornamentation.
这里报道的分子系统发育和比较形态学研究为地下沙漠块菌属（Pyronemataceae，Pezizales）的认可提供了证据。根据大亚基（LSU）序列（28S）rDNA 和内部转录间隔区（ITS）rDNA（包括核 rDNA 的部分 18S、ITS1、ITS2、5.8S 基因和部分 28S）数据，将 Juniperi 和 Lefebvrei 重新分配到 Picoa 属中。孢子、子囊、侧丝和产孢组织的形态学研究表明，Lefebvrei 和 Juniperi 之间具有高度相似性，从而证实了这两个物种都属于 Picoa 属。这两个物种主要可以根据担孢子的纹饰来区分。
