排序方式： 共有10条查询结果，搜索用时 15 毫秒
1
1.
1 INTRODUCTION The first published records of genus Batra-chospermum Roth in China are from Jao (1941), when eleven taxa were reported. Since then, Shi, Hu and Kumano (1993), Shi (1994a, 1994b), Hua and Shi (1996), Xie et al. (1999, 2003), Xie and Shi (2003) have described in more detail the species from China. To date, 23 taxa of Batrachospermum Roth in China have been reported, of which, B. yunnanense, B. nothocladoideum and B. transito-rium are new species of this genus, and are… 相似文献
2.
A New Combination and Two Varieties of Polystigmate Gomphonema （Gomphonemaceae Bacillariophyta） from Heilongjiang Province, China 总被引：1，自引：0，他引：1
The authors discribed a new polystigmate combination, Gomphonema turris Ehr. var. okamurae (Skv.) Fan et Bao.comb.nov., and two new varieties, Gomphonema tuttis Ehr. vat. latum Fan et Wang. var.nov. and Gomphonema acum/natum var. obtusum Fan et Bao, var. nov., that were distinguished by frustule morphology under LM. The samples were collected from freshwater of Heilongjiang Province, China. 相似文献
3.
4.
武汉东湖星形柄裸藻种群的特征与变动 总被引：1，自引：0，他引：1
作者于1981—1983年,对武汉东湖进行藻类调查时,发现主要附生于小型甲壳动物体表的星形柄裸藻(Colacium sideropus),是冬春季节主要的藻类种群之一,其增长高峰出现在冬末春初(3月)。它的正增长时期(每年10月至次年3月)为J形增长曲线,符合指数方程:N_t=N_oe~(kt);它的负增长时期(每年3月至7月),符合另一种指数方程:N_t=ae~(b/t)。它种群内个体分布状况,用方差(v)和样方个体平均数(m)之比值(v/m)进行分析,其结果:绝大多数的v/m>1,为集群分布;只有当平均附着量很小时,偶见v/m≈1,为随机分布。 星形柄裸藻的种群密度(N,个/L)与它对宿主的附着率(R,%)之间的相关性为:N=0.0141e~(0.948R)(r=0.937,p<0.01);种群密度与它在宿主体表的平均附着量(m,个)之间的相关性为:N=1.353e~(0.0326m)(r=0.83l, p<0.01)。 相似文献
5.
ANALYSIS OF EVOLUTIONARY RELATIONSHIP BETWEEN ASTASIA LONGA AND EUGLENA GRACILIS BY USING RAPD TECHNIQUE AND CLADISTIC ANALYSIS 总被引：1，自引：0，他引：1
ＩＮＴＲＯＤＵＣＴＩＯＮＡｓｔａｓｉａａｎｄＥｕｇｌｅｎａ,ｂｏｔｈｂｅｌｏｎｇｉｎｇｔｏＥｕｇｌｅｎａｐｈｙｔａ,ｗｅｒｅｆｉｒｓｔｃｌａｓｓｉｆｉｅｄｂｙＫｌｅｂｓ(1883)ｉｎｔｏｄｉｆｆｅｒｅｎｔｆａｍｉｌｉｅｓａｃｃｏｒｄｉｎｇｔｏｔｈｅｉｒｍｏｄｅｏｆｎｕｔｒｉｔｉｏｎ(ＡｓｔａｓｉａｉｓｓａｐｒｏｐｈｙｔｉｃａｎｄＥｕｇｌｅｎａｉｓｐｈｏｔｏｔｒｏｐｈｉｃ).Ｂｕｔｗｉｔｈｄｅｅｐｅｒｒｅｓｅａｒｃｈｅｓｏｎｉｔｓｍｏｒｐｈｏｃｙｔｏｌｏｇｙ,Ａｓｔａｓｉａｗａｓｆｏｕｎｄｔｏｂｅｖｅｒｙｓ… 相似文献
6.
Although both Astasia longa and Euglena gracdlis belong to different genera, they share many morphological characters except that A. longa has no chloroplast. In the 1940‘ s, on the basis of the finding that in darkness or upon addition of scrne chemicals, E. gmcilis would fade reversibly or irreversibly, scrne scholars hypothesised that A. longa evolved from E. gracilis by losing chloroplast.The authors‘ use of RAPD and cladistic analyses in a study on the evolutionary relationship between A .longa and E. gmcilis showed that the A. longa ‘ s relationship with E. gmcilis was closer than that with other green euglenoids. This proves the hypothesis that A. longa evolved from E. gmcills is reasonable. The results d this study suggest that saprophytic colorless euglenoids were transformed fromgreen euglenoids by losing their choroplasts. 相似文献
7.
NEW TAXA OF EUGLENOPHYTA FROM CHINA 总被引：1，自引：0，他引：1
施之新 《中国海洋湖沼学报》1995,13(4):348-353
Eight new taxa of Euglenophyta are described in this paper. They were collected from severalprovinces in China and respectively named Euglena allorgei var. exsulcata. E pisciformis var. globosa, E.tortiliS, Lepocinclis glabra var. papillata, Phacus pisiformis, Ph.strombuliformis,Ph.trimarginatus var.truncatus and Astasia angusta. 相似文献
8.
Three new species of Batrachospermum Roth (Batrachospermales, Rhodophyta) from China are described in this paper. B. yunnanense sp. nov. has long-cylindrical trichogynes with long stalks and is diagnostic of section Virescentia. Within this section, B. yunnanense is similar to B. helminthosum Bory emend. Sheath et al., but it is dioecious and has curved carpogonial branches, while the latter is monoecious and has straight carpogonial branches. It is also similar to B. transtaganum Reis, but it differs from the latter in long carpogonia,big carposporophytes and carposporangia. It is considered that B. nothocladoideum sp. nov. is assigned to section Contorta, subsection Kushiroense, because its carpogonial branches are twisted and gonimoblast filaments are loosely agglomerated. This new species similar to B. iriomotense Kumano, but with short fascicles, long-ovoid or subpyriform cells, numerous terminal hairs, long-ellipsoid trichogynes, big carposporophytes and small carposporangia. The plant is quite tough and cartilaginous and similar to Nothocladus in gross morphology, but its carposporophytes are compact instead of diffuse. This shows that it may be a transitional species between section Contorta and genus Nothocladus. So, B. transitorium sp. nov. should belong to section Contorta, subsection Kushiroense, because of its curved or twisted carpogonial branches and loosely agglomerated gonimoblast filaments, with globose or subglobose cells in fascicles similar to B. spermatiophorum Vis et Sheath, but no colourless spermatiophores. In terms of small and numerous carposporophytes, B. transitorium sp. nov. is similar to some species of section Batrachospermum. However, their other features are unique, indicating its transitional nature between section Contorta and Batrachospermum. 相似文献
9.
10.
于１９７５－１９８５年,相继在湖北、湖南、云南和陕西等省进行淡水藻类标本的采集,然后进行裸藻门分类研究,发现了裸藻类的新分类单位。它们是无色裸藻类中２个属的１０个新种类;隶属于变换藻属（Ａａｔａｓｉａ）的有５新种和１个７新变种,即梭形变胞藻（Ａ．ａｃｕｓ）、棒形变胞藻（Ａ．ｃｌｃｖｉｆｏｒｍｉｓ）、纺锤变胞藻（Ａ．ｆｕｓｉｆｏｒｍｉｓ）、梨形为胞藻（Ａ．ｐｙｒｉｆｏｒｍｉｓ）、矩形变胞藻（Ａ．ｒｅ 相似文献
1