A morphological study of Peyssonnelia meridionalis (Gigartinales, Rhodophyta), with discussion of spermatangial types within the genus
A morphological study of Peyssonnelia meridionalis (Gigartinales, Rhodophyta), with discussion of spermatangial types within the genus
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Peyssonnelia meridionalis（Gigartinales，红藻门）的形态学研究，并讨论该属内的精囊类型
DOI：
10.2216/i0031-8884-41-2-191.1
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发表时间：
2002
期刊：
影响因子：
1.6
通讯作者：
M. Masuda
中科院分区：
文献类型：
--
作者：
A. Kato;M. Masuda
摘要根据在日本北海道采集的材料，报道了红藓Peyssonnelia pestionalis（Peyssonneliaceae，Gigartinales）的营养和生殖特征。其特征是植物性的紧密贴伏边缘，由小分枝的细丝组成的基底层（下叶状体）平行排列，直立的周叶状体细丝从每个下叶状体细胞的整个上表面产生，和单细胞假根。配子体是雌雄同株的，在单独的线虫体内产生雌性和雄性生殖结构，这些线虫明显（但轻微）升高。卵母细胞是由果殖子枝的基上细胞发育的连接丝发出的，它通过连接细胞与受精的果殖子相接触。精囊线虫完全由精囊丝组成，精囊丝上有1 ~ 4个成对的精子囊，围绕每个中央细胞形成一个螺旋。四孢子囊有一个单细胞的花梗，顶生在明显（但稍微）隆起的线虫的周叶肉丝上，与简单的侧丝相连。
Abstract Vegetative and reproductive features of the red alga Peyssonnelia meridionalis (Peyssonneliaceae, Gigartinales) are reported on the basis of material collected in Hokkaido, Japan. It is characterized vegetatively by tightly appressed margins, the basal layer (hypothallus) consisting of little-branched filaments which are arranged in parallel, the erect perithallial filaments arising from the whole upper surface of each hypothallial cell, and unicellular rhizoids. Gametophytes are monoecious and produce female and male reproductive structures in separate nemathecia that are distinctly (but slightly) elevated. Gonimoblasts issue from the connecting filament that develops from the suprabasal cell of carpogonial branches, which contacts with a fertilized carpogonium by a connecting cell. Spermatangial nemathecia consist entirely of spermatangial filaments, which bear a series of one to four paired spennatangia that form a whorl surrounding each central cell. Tetrasporangia with a one-celled pedicel are terminal on a perithallial filament of distinctly (but slightly) elevated nemathecia and are associated with simple paraphyses.