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Daniela Zappi 《Curtis's Botanical Magazine》1993,10(4):166-170
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星球藻属Asterocapsa二新种 总被引:1,自引:0,他引:1
原植体球形,亚球形或长圆形,细胞单生或2, 4个细胞组成小群体,再由小群体组成大群体,群体直径8~17μm。细胞球形,不包括胶被直径为2~2.2μm,含胶被时直径为4~5.5μm,个体及群体胶被宽厚、坚硬、黄色、层理明显,密生黄色疣突状棘刺。原生质体均匀或具细小颗粒体,蓝绿色。 相似文献
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Charles Drechsler 《American journal of botany》1956,43(10):778-786
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Two acrasid cellular slime molds. Guttulinopsis vulgaris and G. nivea, are compared at the ultrastructural level. The amoebae of the two species are indistinguishable except for the presence of intranuclear fibers in G. vulgaris. Both species share some unusual features, including: plate-like cristae in the mitochondria, production of microbody-like organelles in the perinuclear space, spores with thin bilaminar walls, and stalks containing microfilaments bound in striated bundles. These and other observations are discussed with regard to the development of the sorocarps and the relationship of the genus to other members of the Acrasida. 相似文献
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两种茨藻属植物的染色体组型 总被引:2,自引:0,他引:2
游浚;孙祥钟;王徽勤 《武汉植物学研究》1990,8(4):387-389
笔者曾在1985年报道过分布于我国大陆的6种茨藻属(Najas L.)植物的染色体数目及核型分析结果。而高雄茨藻(N. browniana Rendle)和弯果茨藻(N. ancistrocarpa A. Br. ex Magnus)为笔者不久前(1987年)才发现它们在我国大陆上有分布。据载,仅弯果茨藻前人作过染色体计数工作。因此,作为对整个茨藻属细胞分 相似文献
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本文报道假尾孢属的一个新种:复叶耳蕨假尾孢(Pseudocercospora arachniodis Y.L. Guo, sp. nov.)和一个新组合:单叶藤桔假尾孢[ Pseudocercospora paramignyae(Thirum. & Chupp) Y.L. Guo, cobm. nov.]。新种生于鳞毛蕨科(Dryopteridaceae)复叶耳蕨属植物上,子实体生于叶背面,具小子座,分生孢子梗浅青黄色至青黄色,不分枝,一个隔膜,6.5-30.0 × 2.5-4.0 μm。分生孢子针形,短孢子呈倒棍棒形,浅青黄色,具不明显地3-11个隔膜,30.0-110.0 × 1.5-3.0 μm。假尾孢属在鳞毛蕨科是首次报道。文中对新种提供了拉丁文简介并绘图。研究的标本保藏在中国科学院微生物研究所真菌标本室(HMAS)。 相似文献
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Two new gynandrosporous species of Oedocladium from the United States were isolated into unialgal culture and comparative studies were made. The new taxa described, O. carolinianum sp. nov. and O. cir-ratum sp. nov., are morphologically very similar. Both species have an opercufate oogonium with inferior division, oospore walls with the middle layer ungulate, and hyaline suffultory cells containing a small amount of vacuolated cytoplasm. Conditions for sexuality in culture zuere determined for both species. Zoospores and akinetes serve as means for asexual reproduction. 相似文献
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Two new species of Chlamydomonas, C. surtseyiensis and C. archibaldii, are described as is their sexual reproduction which occurs in clonal culture. 相似文献
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SELECTED dimensions have been measured on 307 specimens of C.caputserpentis L. and C. capuldraconis Melvill. Analysis ofthe results shows three groups which merit taxonomic distinction.They are : C. caputserpentis caputserpentis L. Indian and Pacific Oceans. C. c. capulophidii (Schilder) Hawaiian Is. C. capuldraconis Melvill Easter I. (Received 14 November 1958; 相似文献