共查询到20条相似文献,搜索用时 562 毫秒
1.
以大肠杆ATCC25922、金黄色葡萄球菌ATCC25923及其临床多重耐药分离株ETEC-AD9、MRSA-DF12共4株人体病原细菌为靶标菌,采用琼脂块法从越南槐内生真菌中筛选抗菌活性菌株,并以改良的微量肉汤稀释法测定其代谢产物的最小抑菌浓度;根据形态和分子特征鉴定拮抗菌株的分类学地位。结果表明,菌株TRPH-35的活菌块对各病原细菌的抑菌圈直径与阳性对照相当;其代谢产物对各病原菌的最小抑菌浓度为20~40μg/mL;初步鉴定该菌株为刺盘孢。本研究结果表明,菌株TRPH-35鉴定为刺盘孢,对参试病原细菌均显示强的抗菌活性,具有较大的开发应用潜力。 相似文献
2.
3.
4.
报道了在广西发现的2个百合科蜘蛛抱蛋属Aspidistra新种,即乳突蜘蛛抱蛋A. papillata G. Z. Li和环江蜘蛛抱蛋A. huanjiangensis G. Z. Li&Y. G. Wei。乳突蜘蛛抱蛋与大花蜘蛛抱蛋A. tonkinensis(Gagner. )F. T. Wang&K. Y. Lang近缘。它们的共同特征是:花单生;花被裂片两侧彼此覆盖;柱头盾状,边缘3裂,上表面具3条辐射状沟缝。不同点是:乳突蜘蛛抱蛋植株较大花蜘蛛抱蛋的粗大;叶柄较粗;叶片椭圆形或长椭圆形;花被阔钟 相似文献
5.
中国的红索藻属植物 总被引:2,自引:0,他引:2
记述了中国产红索藻属Thtorea Bory emend.Necchi的2种2变种,即棘刺红索藻T.hispida(Thorea)Desvaux emend,Sheath,Vis et Cole,棘刺红索藻小孢变种T.hispida var,microspora S.L.Xie et Z.X.Shi,蓝色红索藻T.vio—lacea Bory emend.Sheath,Vis et Cole和蓝色红索藻长毛变种T.violacea var.longipilosa S.L.Xie et Z.X.Shi.其中,蓝色红索藻T.violacea Bor yemend.Sheath,Vis et Cole为中国新记录,棘刺红索藻小孢变种T.hispida var.microspora S.L.Xie et Z.X.Shi和蓝色红索藻长毛变种T.violacea var,longipilosa S.L Xie et Z.X.Shi为新变种。 相似文献
6.
值得注意的中国植物(续) 总被引:1,自引:1,他引:0
续报道了大戟科等 8个分类单位。大果留萼木 ( Blachia andamanica)为广东和海南的新记录 ;崖州留萼木 ( B.jatrophifolia)的新异名为 B.yaihsienensis;黄毛果巴豆 ( Croton lachynocarpusvar.kwangsiensis)是降级新组合 ;黄蓉花 ( Dalechampia bidentata)分布至云南西南部 ,D. bidentata var. yunnanensis为其新异名 ;海人树 ( Suriana maritima) ,广东省的东沙群岛才有 ,台湾不产 ;锥序丁公藤 ( Erycibe subspicata)其分布东缘在贵州西南部 ;头花小牵牛 ( Jacquemontia tamnifolia) ,广东的归化杂草 ;松下草 ( Petrosavissinii) ,广东新记录 相似文献
7.
丽江杓兰大围山变种(Cypripedium lichiangense vat.daweishanense)被提升为种的等级:大围山杓兰(Cypripedium daweishanense)。此种的特征是:中萼片浅黄绿色,上面疏被栗色斑点;花瓣较短,近等长于或略长于唇瓣。而丽江杓兰(Cypripedium lichiangense)的中萼片为紫肝色;花瓣要长得多,大约为唇瓣长的2倍。它们均属于三棱组(Cypripedium sect.Trigonopedium)。该组共含11种,均为中国特有种。文中提供了一个该组的分种检索表。 相似文献
8.
丽江杓兰大围山变种(Cypripedium lichiangensem var.daweishanense)被提升为种的等级:大围山杓兰(Cypripedium daweishanense)。此种的特征是:中萼片浅黄绿色,上面疏被栗色斑点;花瓣较短,近等长于或略长于唇瓣。而丽江杓兰(Cypripedium lichiangense)的中萼片为紫肝色;花瓣要长得多,大约为唇瓣长的2倍。它们均属于三组(Cypripediumsect.Trigonopedium)。该组共含11种,均为中国特有种。文中提供了一个该组的分种检索表。 相似文献
9.
Pyrgophyllum (Gagnep.) T. L. Wu et Z. Y. Chen is a monotypic genus of Zingiberaceae from China. Originally, it was placed in Kaempferia as a subgenus by Gagnepain (1901),
later transferred to Camptandra by Schumann (1904) and to Caulokaempferia by R. M. Smith.
(1972).
In this paper, the authors suggest that the separation of Pyrgophyllum at generic rank is
justified on cytological, morphological and anatomical evidence. It is characterised by the large
lamina-like bracts, which are rarely seen in Zingiberaceae. The margin of each bract is adnate to the main axis of the inflorescence at the base and the lip is lobed. Trichomes unicellular, stomata each with 4-7 lateral subsidiary cells, lateral veins are of three various types of
vascular bundles: girder-shaped, semigirder-shaped and isolated. The pollen grains are spinecent.
The basic chromosome number (x) is 21.
The type species, Pyrgophyllum yunnanensis (Gagnep.) T. L. Wu et Z. Y. Chen (Kaempferia yunnanensis Gagnep.), is only distributed in Yunnan and Sichuan provinces of China. 相似文献
10.
11.
12.
13.
14.
Plant communities on riversides in northern Guangdong Province were investigated with all-survey method, where a kind of native grasshopper Fruhstorferiola tonkinensis Will. broke out severely. 108 plant species belonging to 43 families were identified, and some plant indexes in those plant communities including their name, average height, congregation index, total coverage rate, phenological phase and biod were noted. In addition, plant comparability, plant abundance, quantity character and attribute symbol of dominant species in plant communities on riversides were studied. The results showed that the arrangement and distribution of vegetations on riversides offered a favorable habitat for F. tonkinensis. Moreover, the density of first instar nymphs of F. tonkinensis in plant communities was calculated. The results of partial correlation analysis (PCA) about the relationship between plant communities and occurrence of F. tonkinensis showed that Pterocarya stenoptera C. DC. was the most palatable plant to F. tonkinensis, presenting a very significantly positive correlation between coverage rate of P. stenoptera and occurrence of F. tonkinensis. The partial correlation coefficient (PCC) was 0.856072 (F=32.92012, P=0.0001). Bambusa flexuosa was a non-preferable plant of F. tonkinensis, presenting a significantly negative correlation between them, and the partial correlation coefficient was ?0.607920 (F=0.16173, P=0.0211). Those results would help us to propose some approaches for the ecology control of F. tonkinensis on riversides in northern Guangdong Province. 相似文献
15.
关于顶生金花茶分类地位的探讨 总被引:1,自引:0,他引:1
根据近年来对顶生金花茶和平果金花茶在其原产地的进一步调查和野外观察并参考过去的研究成果,发现:顶生金花茶与平果金花茶在分布、形态特征、物候期、生态习性及细胞学特性,尤其是繁殖器官和生活史等方面都有明显差异。因此,认为将其降为平果金花茶的变种颇为不妥,主张恢复顶生金花茶作为一个独立种的地位,其名称为顶生金花茶。 相似文献
16.
关于蒙古绣线菊毛枝变种及回折绣线菊的学名订正 总被引:2,自引:0,他引:2
支持将蒙古绣线菊毛枝变种提升为种的等级且于宁夏绣线菊同种,但其合法学名应为Spiraea tomentulosa(Yu)Y.Z.Zhao。与此同时,本文发现了真正的蒙古绣线菊的毛枝变种--S. mongolica Maxim.var.pubescens Y.Z.Zhao et T.J.Wang。 相似文献
17.
18.
A simple, rapid and reliable high-performance capillary electrophoresis method has been developed to determine quantitatively the alkaloid content of Sophora tonkinensis, a Chinese herb commonly known as shan-dou-gen. A total of seven quinolizidine alkaloids (cytisine, sophocarpine, matrine, lehmannine, sophoranol, oxymatrine and oxysophocarpine) could be readily separated within 15 min. The running buffer was 50 mM phosphate buffer (pH 2.5) containing 1% hydroxypropyl-beta-cyclodextrin and 3.3% isopropanol in water. The applied voltage was 25 kV, the capillary temperature was 25 degrees C, the detection wavelength was 200 nm and scopolamine butylbromide was used as internal standard. The method was used to analyse the chemical constituents of two commercial alternatives to shan-dou-gen. The alkaloid constituents of authentic shan-dou-gen gave a specific HPCE electropherogram that could be used to distinguish the drug from potential substitutes. Furthermore, the content of oxymatrine and the total content of the seven quinolizidine alkaloids could be used as quantitative markers in order to assess the quality of S. tonkinensis. 相似文献
19.
When the genus Yinshania Ma et Y. Z. Zhao was published, it had
only a single species, Y. albiflora Ma et Y. Z. Zhao which was indicated as the
type of the genus (Acta Phytotax. Sin. 1979). Y. Z. Zhao 155. was indicated as
the type specimen of Y. albiflora. It is adequate to cite Y. albiflora Ma et Y. Z.
Zhao as the type of genus Yinshania Ma et Y. Z. Zhao. In a revision (Acta Phytotax. Sin. 25(3): 204-219, 1987) Y. H. Zhang made a combintion, Yinshania
acutangula (O. E. Schulz) Y. H. Zhang (=Cochlearia acutangula O. E. Schulz)
and reduced Yinshania albiflora Ma et Y. Z. Zhao as a variety of Y. acutangula,i.
e. Y. acutangula var. albiflora (Ma et Y. Z. Zhao) Y. H. Zhang. She is uncorrect,
however, when she cited Y. acutangula (O. E. Schulz) Y. H . Zhang as the type
of the genus Yinshania Ma et Y. Z. Zhao. It should be cited as follows:
Yinshania Ma et Y. Z. Zhao
Typus generis: Yinshania albiflora Ma et Y. Z. Zhao (=Yinshania acutangula(O. E. Schulz) Y. H. Zhang var. albiflora (Ma et Y. Z. Zhao) Y. H. Zhang) 相似文献