Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Spain.
Med Mycol. 2010 Feb;48(1):122-8. doi: 10.3109/13693780902939695.
Scedosporium apiospermum has traditionally been thought of as the anamorph of Pseudallescheria boydii (Microascaceae, Ascomycota), but recent molecular studies has demonstrated that they are different species. Since a teleomorph was not observed among isolates recently identified as S. apiospermum, we investigated whether this species could be heterothallic. In this study, 15 isolates of S. apiospermum were paired in all possible combinations, including self-pairings. Several combinations produced fertile ascomata typical of the genus Pseudallescheria, while all isolates were self-sterile. The isolates were grouped into two different mating types. Crosses among F1 progeny ascospores demonstrated a bi-allelic heterothallic mating system. The new species Pseudallescheria apiosperma, teleomorph of S. apiospermum, is proposed and described.
棘孢木霉传统上被认为是拟青霉（Microascaceae，子囊菌门）的无性型，但最近的分子研究表明它们是不同的物种。由于最近鉴定为棘孢木霉的分离株中未观察到有性型，我们研究了该物种是否为异宗配合。在这项研究中，将 15 株棘孢木霉分离株以所有可能的组合配对，包括自交。一些组合产生了典型的拟青霉属的可育子囊果，而所有分离株均为自交不育。分离株被分为两种不同的交配型。F1 后代子囊孢子的杂交证明了双等位异宗配合的交配系统。拟青霉棘孢木霉，棘孢木霉的有性型，被提议并描述。
