バイカル湖沿岸地帯のオリゴケータ群におけるアクチノスポリア段階 (Myxozoa) の発生に関する最初の報告
Marina Dashi-Dorjievna Batueva1, Roman Yuryevich Abasheev2
1Institute of General and Experimental Biology of Siberian Branch, Russian Academy of Sciences, Ulan-Ude, 670047 Russia.
まとめ
バイカル湖のオリゴケエテスに新しいトリアクティノミクソン型ミクソゾウ寄生虫が確認された. この寄生虫は宿主の腸内細胞に重大なダメージを与え 潜在的生態学的影響を強調しました
科学分野:
- 水中の寄生虫学
- ミキソゾア 生物学
- オリゴケエテ エコロジー
背景:
- ミキソゾア寄生虫は水生生態系における重要な病原体である.
- オリゴケエツは多くのミクソゾア種の中間宿主として機能する.
- 寄生虫と宿主との相互作用を理解することは 水生生物の健康にとって極めて重要です
研究 の 目的:
- バイカル湖で発見された新種のミクロゾウ寄生虫 オリゴケエテスを特定し特徴づけること
- 寄生虫が宿主に及ぼす 病理的影響を調査する
- 新種の寄生虫の遺伝的位置を決定する
主な方法:
- バイカル湖のオリゴケータの採集と調査
- 寄生虫の形態学および分子分析 (18S rDNAシーケンシング)
- BLASTとシーケンスの比較を用いた系統分析.
主要な成果:
- *Limnodrilus udekemianus*の1つの標本 (0. 1%) はトリアクティノミクソン型MNVアクチノスポーに感染していた.
- アクティノスポールは腸内皮質で形成され,高縮と細胞死を引き起こした.
- 18S rDNA配列 (PP575756) は, *Chloromyxum legeri* と97. 51%の類似性を示した.
結論:
- トリアクティノミクソン型MNVは,バイカル湖のオリゴケータに感染する新しいミクソゾーン種を表しています.
- 寄生虫は宿主の腸内皮質に 重要な組織病理学的変化を引き起こします
- 系統遺伝学的分析では,この寄生虫は *Chloromyxum* 属に属し,サイプリニド魚との潜在的な関連を示唆している.
関連する概念動画
Diversity of Protists III
124
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
124
Diversity of Protists IV
118
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
118
Bacterial Phylum Actinobacteria
111
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
111
Diversity of Protists II
132
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
132
Diversity of Protists I
117
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
117
Bacterial Phylum Planctomycetes
82
Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...
82


