Aphelidium parallelum sp. nov., a new aphelid parasitic on selenastracean green algae
Aphelidium parallelum sp. nov., a new aphelid parasitic on selenastracean green algae
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平行蚜虫 sp.
DOI：
10.1080/00275514.2022.2039487
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发表时间：
2022
期刊：
影响因子：
2.8
通讯作者：
Maiko Kagami
中科院分区：
文献类型：
--
作者：
Kensuke Seto;Takashi Nakada;Yuuhiko Tanabe;Masaki Yoshida;Maiko Kagami
拟寄生菌（Aaplidiomycota）是藻类的细胞内寄生菌，是真菌界早期分化或姐妹谱系之一。虽然蚜虫是一个小集团，包括4个属和17个种，分子系统发育分析显示，许多环境的DNA序列代表未描述的谱系，表明其隐藏的多样性。在这里，我们调查了一个新的蚜虫菌株，KS 114，寄生在月形绿色藻类。KS114具有典型的蚜虫生活史，产生的游动孢子与Aphelidium chlorococcorumf.majusin相似，具有单一的顶端丝状伪足，但可以通过超微结构特征来区分。在KS114中，动粒和无鞭毛中心粒平行排列，这是已知蚜虫中的一个独特特征。在KS114的游动孢子中未发现动杆菌相关结构，如纤丝根和微管。在nuc 18 S rDNA序列的分子系统发育中，KS 114与两个环境序列聚在一起，并且与所有其他已测序物种不同。根据这些结果，我们将该蚜描述为一新种，Aphelidium parallelum.http://www.zoobank.org/urn:lsid:zoobank.org:act:3CB658DB-1F12-41EF-A57D-2CBFCDE6A49A
Aphelids (phylum Aphelida = Aphelidiomycota) are intracellular parasitoids of algae and represent one of the early-diverging or sister lineages of the kingdom Fungi. Although aphelids are a small group comprising four genera and 17 species, molecular phylogenetic analyses revealed that numerous environmental DNA sequences represent undescribed lineages, indicating their hidden diversity. Here, we investigated a novel aphelid strain, KS114, that parasitizes selenastracean green algae. KS114 exhibited a life cycle typical of aphelids and produced posteriorly uniflagellate zoospores that resembled those ofAphelidium chlorococcorumf.majusin possessing a single apical filopodium but could be distinguished by ultrastructure features. In KS114, the kinetosome and nonflagellated centriole were aligned in parallel, a unique characteristic among the known aphelids. Kinetid-associated structures, such as fibrillar root and microtubules, were not found in the zoospores of KS114. In the molecular phylogeny of nuc 18S rDNA sequences, KS114 clustered with two environmental sequences and was distinct from all other sequenced species. Based on these results, we describe this aphelid as a new species,Aphelidium parallelum.http://www.zoobank.org/urn:lsid:zoobank.org:act:3CB658DB-1F12-41EF-A57D-2CBFCDE6A49A