与N. agnita、N. kuetzingioides等种相比,虎鞭藻的主要捕食硅藻为Nitzschia captiva sp. 11 .(硅藻门)

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Phycologia Pub Date : 2023-03-04 DOI:10.1080/00318884.2023.2169024
D. Mann, Norico Yamada, J. Bolton, A. Witkowski, R. Trobajo
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引用次数: 2

摘要

capensis是一种生长在高潮间带海相岩石池中的藻体生长的鞭毛藻,可以利用多种硅藻进行光合作用。然而,很少有硅藻允许鞭毛藻无限期存活,rbcL序列表明,从自然界分离的D. capensis含有两种密切相关的Nitzschia物种之一作为其kleptoplasids。在培养过程中,如果没有这些“必需的”尼氏细胞来补充硅藻质体和其他细胞器在细胞内的储存,d.c apensis最终会失去所有的kleptoplastids并死亡。在杜林斯基体内,硅藻不具有胞囊,因此在形态上不能与自由生活的形式进行比较。最近,从capensis的模式区分离出一种重要的Nitzschia种并进行培养,从而可以与相似的Nitzschia种,特别是从模式材料中检测到的N. agnita和N. kuetzingioides进行比较。我们认为,d.c apensis的“必需硅藻”在形态上与这些和其他Nitzschia物种不同,因此将其描述为N. captiva sp. 11 . Nitzschia agnita和N. kuetzingioides,另一方面,Nitzschia agnita具有优先权。虎斑尼奇亚(Nitzschia captiva)和agnita在瓣形、尺寸、形态和超微结构上极为相似,但可以通过它们的束状结构加以区分。Nitzschia agnita似乎是一种淡水物种,尽管有些耐盐。相比之下,迄今为止,主要从d.c apensis的窃体记录中而不是从frustules中知道的n.c aptia是海洋的。
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Nitzschia captiva sp. nov. (Bacillariophyta), the essential prey diatom of the kleptoplastic dinoflagellate Durinskia capensis, compared with N. agnita, N. kuetzingioides and other species
ABSTRACT Durinskia capensis is a kleptoplastic dinoflagellate species from high intertidal marine rock pools, which can use a variety of diatoms for photosynthesis. However, very few of the diatoms permit indefinite survival of the dinoflagellate and rbcL sequences show that D. capensis isolated from nature contains one of two closely related Nitzschia species as its kleptoplastids. In culture, without a supply of these ‘essential’ Nitzschia cells to replenish the intracellular store of diatom plastids and other organelles, D. capensis eventually loses all its kleptoplastids and dies. Inside Durinskia, diatoms do not possess frustules and so cannot be compared morphologically with free-living forms. Recently, one of the essential Nitzschia species was isolated from the type locality of D. capensis and grown in culture, allowing comparison with similar Nitzschia species, particularly N. agnita and N. kuetzingioides, examined from type material. We conclude that the ‘essential diatom’ of D. capensis differs morphologically from these and other Nitzschia species and it is therefore described as N. captiva sp. nov. Nitzschia agnita and N. kuetzingioides, on the other hand, are conspecific and N. agnita has priority. Nitzschia captiva and N. agnita are extremely similar in valve shape, dimensions, pattern and ultrastructure, but can be separated by their girdle structure. Nitzschia agnita appears to be a freshwater species, though somewhat salt-tolerant. In contrast, N. captiva, which is known principally from records of the kleptoplastids of D. capensis rather than from frustules, is so far marine.
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来源期刊
Phycologia
Phycologia 生物-海洋与淡水生物学
CiteScore
3.10
自引率
18.80%
发文量
54
审稿时长
3 months
期刊介绍: Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.
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