Nosema sp. PM-1, a new isolate of microsporidian from infected Papilio machaon Linnaeus, based on ultrastructure and molecular identification.

Tie Liu, Jinshan Xu, Bo Luo, Jie Chen, Zeng Li, Tian Li, Guoqing Pan, Xueyan Li, Zeyang Zhou

Acta parasitologica / Witold Stefański Institute of Parasitology, Warszawa, Poland 2015 Jun

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A new microsporidium, Nosema sp. PM-1, was first isolated from Papilio machaon Linnaeus. The spore shape of the PM-1 isolate was a long oval with an average size of 3.22 μm × 1.96 μm. Ultrastructure observation showed that PM-1 had a typical Nosema common diplokaryotic nuclei structure with 10-13 polar filament coils, spore wall, plasma membrane, and anchoring disk. The complete rRNA gene sequences were obtained by polymerase chain reaction amplification and each rRNA unit was arrayed as follows: 5'-LSU (2497 bp)-ITS (179 bp)-SSU (1232 bp)-IGS (278 bp)-5S (115 bp)-3', which was the same as typical Nosema. The phylogenetic trees of rRNA, DNA-directed RNA polymerase II subunit, and tubulin genes all show that PM-1 was a sister to the clade comprising Nosema bombycis, Nosema spodopterae, and Nosema sp. PX1. The spore morphology, ultrastructure, and complete rRNA structure indicate that this isolate assigned to the ˝true˝ Nosema group, can parasitized in Papilio machaon Linnaeus, which provides a wider host range for Nosema.

Citation

Tie Liu, Jinshan Xu, Bo Luo, Jie Chen, Zeng Li, Tian Li, Guoqing Pan, Xueyan Li, Zeyang Zhou. Nosema sp. PM-1, a new isolate of microsporidian from infected Papilio machaon Linnaeus, based on ultrastructure and molecular identification. Acta parasitologica / Witold Stefański Institute of Parasitology, Warszawa, Poland. 2015 Jun;60(2):330-6