从日本奄美岛河水中分离出的新种Pythium amaminum sp.

IF 1.5 4区生物学 Q4 MYCOLOGY

Mycoscience Pub Date : 2024-05-02 DOI:10.47371/mycosci.2024.02.004

Hina Kikuchi, Ayaka Hieno, Haruhisa Suga, Hayato Masuya, Seiji Uematsu, Koji Kageyama

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引用次数: 0

摘要

从日本鹿儿岛县奄美岛的河水和水库水中分离出了 Pythium amaminum sp.该物种可在 10 °C 至 35 °C 的温度范围内生长。在 25 °C 的最适温度下，其径向生长速度为每天 22.5 mm。Pythium amaminum 产生的丝状孢子囊由分枝、裂片或指状元件组成，形成大型复合体。Zoospores 在囊泡内形成，通过至少 320 μm 的长管排出。球状的子房上有圆锥形的钝刺。卵孢子无裂，球形。花药缠绕在子房上或粘在子房上。这些特征既有孢子囊的长排出管，又有带刺的子房，但在其他任何毕赤霉属的物种中都没有观察到，因此我们认为 P. amaminum 是一个新的毕赤霉属物种。

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New species Pythium amaminum sp. nov. isolated from river water on Amami Island in Japan

Pythium amaminum sp. nov. was isolated from river and reservoir water on Amami island, Kagoshima Prefecture, Japan. The species can grow at temperatures between 10 °C and 35 °C. At the optimum temperature of 25 °C, the radial growth rate is 22.5 mm per day. Pythium amaminum produces filamentous sporangia consisting of branched, lobulate or digitate elements forming large complexes. Zoospores form inside the vesicle, which is discharged through a long tube at least 320 μm. Globose oogonia are ornamented with conical blunt spines. Oospores are aplerotic and globose. Antheridia twine around the oogonia or stick to them. These features having a both of the long discharge tube from sporangium and oogonia with spines are not observed in any other species of the genus Pythium, and thus we conclude that P. amaminum is a new Pythium species.

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来源期刊

Mycoscience MYCOLOGY-

CiteScore

3.00

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： Mycoscience is the official English-language journal of the Mycological Society of Japan and is issued bimonthly. Mycoscience publishes original research articles and reviews on various topics related to fungi including yeasts and other organisms that have traditionally been studied by mycologists. The research areas covered by Mycoscience extend from such purely scientific fields as systematics, evolution, phylogeny, morphology, ecology, physiology, biochemistry, genetics, and molecular biology, to agricultural, medical, and industrial applications. New and improved applications of well-established mycological techniques and methods are also covered.