详细观察淡水绿藻 Oocystaenium elegans（卵囊菌科，Trebouxiophyceae）的生活史和系统发育位置，并修订描述

IF 1.6 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Phycological Research Pub Date : 2024-06-04 DOI:10.1111/pre.12559

Aya Mizobuchi, Shinji Handa, Hiromi Tsubota

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引用次数: 0

摘要

Oocystaenium elegans Gonzalves & Mehra（卵囊菌科，Trebouxiophyceae）采集自日本的稻田。根据对培养材料的详细观察，对其生活史进行了重新研究，并给出了修改后的描述。该物种是一种大型纺锤形绿藻，生长在水坑和稻田中，印度、尼泊尔和古巴都有报道。其繁殖方式为无性生殖和有性生殖。虽然这种卵生方式被认为是由球状卵细胞和花药受精，但本研究结果显示，受精后的卵细胞（雌性细胞）仍呈纺锤形，成为球状合子。花药附着在卵细胞上的地方膨胀成为接受乳头，之后花药侵入。根据核 18S 小亚基核糖体 RNA 基因序列进行的系统发育分析表明，卵囊虫属于卵囊科卵囊虫属。

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Detailed observations of the life history and phylogenetic placements of the freshwater green alga Oocystaenium elegans (Oocystaceae, Trebouxiophyceae), with an emended description

Oocystaenium elegans Gonzalves & Mehra (Oocystaceae, Trebouxiophyceae) was collected from a paddy field in Japan. Its life history was reexamined based on detailed observations of cultured material, and an emended description is given. This species is a large spindle‐shaped green alga that grows in puddles and paddy fields and has been reported in India, Nepal and Cuba. Reproduction occurs asexually via autospore formation and sexually via oogamy. Although this oogamy is considered to involve fertilization by globular egg cells and antherozoids, the results of the present study revealed that the egg cells (female cells) remained spindle‐shaped and became globular zygotes after fertilization. The place on the egg cells where the antherozoid attached swelled to become a receptive papilla, after which the antherozoid invaded. Phylogenetic analysis based on nuclear 18S small subunit ribosomal RNA gene sequences showed that O. elegans is included in the family Oocystaceae.

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来源期刊

Phycological Research 生物-海洋与淡水生物学

CiteScore

3.60

自引率

13.30%

发文量

审稿时长

>12 weeks

期刊介绍： Phycological Research is published by the Japanese Society of Phycology and complements the Japanese Journal of Phycology. The Journal publishes international, basic or applied, peer-reviewed research dealing with all aspects of phycology including ecology, taxonomy and phylogeny, evolution, genetics, molecular biology, biochemistry, cell biology, morphology, physiology, new techniques to facilitate the international exchange of results. All articles are peer-reviewed by at least two researchers expert in the filed of the submitted paper. Phycological Research has been credited by the International Association for Plant Taxonomy for the purpose of registration of new non-vascular plant names (including fossils).