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1.
研究的拟丁氏蕨(Paratingia)和拟丁氏蕨穗(Paratingiostachya)标本采自中国内蒙古乌达地区早二叠世山西组,包括大同拟丁氏蕨(P--aratingia dotongensis Zhang)和华夏拟丁氏蕨穗(新属,新种)(Paratingiostachya cathaysiana gen.et sp。.nov)。2块属于拟丁氏蕨穗的标本与拟丁氏蕨的标本很好地保存在一起,表明两者关  相似文献   

2.
内蒙古乌达地区早二叠世晋囊蕨属一新种   总被引:3,自引:0,他引:3  
通过扫描电镜研究,建立了内蒙古中部乌达地区下二叠统山西组晋囊蕨诉一个新种Chansitheca wudaensis sp .onv.。新种的小心片Sphenopteris型,囊群椭圆形,由4~10个孢子囊组成,着生一示羽片背面,位于中脉的两侧。环带横列于孢子囊的上部,完全,单排细胞,细胞数目约为18个,这些特征表明新种属于里白科。  相似文献   

3.
腔孢纲真菌的三个新种   总被引:4,自引:0,他引:4  
习平根  戚佩坤 《菌物系统》2000,19(4):466-469
在调查香龙血树Dracaena fragrans(L.)Ker-Ganl.的病害中,发现了腔孢纲真菌的3个新种,即:Phlmopsis dracaenicolaZ.D.Jiang,P.G.Xi et P.K.Chi,Bartalinia dracaenae P.G.Xi,Z.D.Jiang et P.K.Chi及Sphaeropsis dracaenae P.G.Xi et P.K.Chi,模式标  相似文献   

4.
广西云南玉米霜霉病病原菌订正   总被引:2,自引:0,他引:2  
在我国文献中广西云南玉米霜霉病菌名称为Peronosclerospora maydis(Racib.)C.G.Shaw。但是我们观测病菌孢子囊为长椭球形;在13℃-28℃产孢温度范围内,随温度升高孢子囊长度增加而宽度基本不变,表明它不是P.maydis,而是P.sacchari(T.Miyake)Shirai & K.Hara,或P.philippinensis(Weston)C.G.Shaw。以  相似文献   

5.
光对4种木本植物叶片清除有机自由基能力的影响   总被引:3,自引:0,他引:3  
生长在没光强下的4种木本植物荷对(Schima superba Gardn.et Champ.)、黧蒴(Castanopsis fissa (Champ.ex Benth.)Rehd.et Wils.)(乔木)和九节(Psychotriarubra (Lour。.)Poir),罗伞(Ardisia quinquegona B1.)(林下灌木)幼苗(盆栽)或幼树(自然林下)叶片的50%乙醇提取液具  相似文献   

6.
河南山黧豆属和杭子梢属订正   总被引:1,自引:0,他引:1  
归并了山黧豆属1种和杭子梢属1变种。即将河南香豌豆Lathyrus henanensis S.Y.Wang作为安徽山黧豆L.anhuiensis Y.J.Zhu et R.X.Meng的新异名;白花杭子梢Campylotropis macrocarpa(Bge.) Rehd.var.alba S.Y.Wang作为杭子梢原变种C.macrocarpa (Bge.)Reehd.var.macrocarpa的新异名。  相似文献   

7.
广西宜山地区上石炭统与下二叠统界线附近的珊瑚由下面上可划分为5个组合带:(1)Paracarruthersella-Carinthiaphyllum carnicum(Pa-Ca)组合带,(2)Pseudocarniaphyllum-Pseudozaphrentoides mapingensis-Antheria polygonalis(Pa-Pm-A)组合带,(3)Chusenophy-Poly  相似文献   

8.
二叠纪枝脉蕨型真蕨植物一新属——Lixotheca gen. nov.*   总被引:2,自引:0,他引:2  
根据生殖器官类型,继将二叠枝脉蕨(Cladophlebis permica Lee et Wang)的华南标本改归天石蕨属(Szea)之后,为该种的华北标本另建了一新的属名-李氏蕨属(Lixotheca),并再次表述了该种华南标本改归Szea的理由。根据对饱子囊群、孢子囊及孢子结构的研究,认为Lixotheca归入膜蕨科的是较为充分的,而Szea则应被归入里白科。  相似文献   

9.
部分裸子植物叶片总蛋白分析   总被引:1,自引:0,他引:1  
王艇  苏应娟  黄超  朱建明   《广西植物》1999,19(4):367-372
采用SDS- PAGE 技术, 分析了红豆杉科(Taxaceae) 植物南方红豆杉( Taxus chinensisvar- mairei (Lemee et Levl-) Cheng et L-K-Fu) 、穗花杉( Amentotaxus argotaenia (Hance) Pil ger) 、云南穗花杉( A- yunnanensis Li) 、白豆杉( Pseudotaxuschienii(Cheng) Cheng) 以及三尖杉科(Cephalotaxaceae) 、植物三尖杉( Cephalotaxus fortunei Hook-f-) 、粗榧( C-sinensis (Rehd-etWils-) Li) 、海南粗榧( C-hainanensis Li) 、篦子三尖杉( C-oliveri Mast-) 和罗汉松科(Podocarpaceae) 、植 物罗汉松 ( Podocarpus macrophyllus ( Thunb- ) D-Don) 、鸡毛 松( P-imbricatus Bl-) 、竹柏( P- nagi(Thunb-) Zoll) 、陆均松( Dacrydium pierrei Hickel) 共12 种植物的叶片蛋白, 在蛋白质水平上采用  相似文献   

10.
用扩增片段长度多成性(AFLP,amplified fragment length polymorphism)方法研究了荷木(Schima superba Gardn.et Champ.)和锥栗(Castanopsis chinensisHance.)在3个演替系列群落中的分子变化。研究地点位于广东省鼎湖山。3个群落是针叶林群落、针阔叶混交林群落和常绿阔叶林群落。荷木的AFLP分析结果表明,4组  相似文献   

11.
四川蜘蛛抱蛋的甾体皂甙   总被引:5,自引:0,他引:5  
从四川蜘蛛抱蛋(Aspidistra sichuanensis K。Y。Lang et Z。Y。Zhu)根状茎中分离得到三个甾体皂甙,经光谱和化学方法分别鉴定为22-甲氧基-5β-呋喃甾烷-1β,3β,4β,5β,26-五羟基26-O-β-D吡喃葡萄糖甙(1),蜘蛛抱蛋皂甙(2)和原蜘蛛抱蛋皂甙(3)。(1)是一个呋喃甾醇型单糖链的新皂甙,(3)是本植物的主要皂甙。  相似文献   

12.
棕粑叶中甾体皂甙和皂甙元的分离鉴定   总被引:4,自引:0,他引:4  
从棕粑叶(Aspidistra zongbayi K.Y.Lang et Z.Y.Zhu)根茎正丁醇提取物中分离得到两个甾体皂甙。通过物理和化学方法鉴定为蜘蛛抱蛋皂甙(3-0-{β-D-吡喃葡萄糖(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃葡萄糖-(1→4)-β-D-吡喃半乳糖}-薯蓣皂甙元)和原蜘蛛抱蛋皂甙。从正丁醇部分酸水解物中分到△~(3,5)-脱氧替告皂甙元、薯蓣皂甙元、静特诺皂甙元。从根茎中还得到β-谷甾醇。  相似文献   

13.
描述了贵州水城大河边煤矿晚二叠世龙潭组的植物茎干化石Guizhouoxylon dahebianense gen. et sp. nov., 茎具清楚生长轮,髓部较大,初生木质部内始式,原生木质部由环纹管胞、稀螺纹管胞组成,后生木质部包括有密螺纹管胞和密螺纹至梯纹增厚的导管组成,导管近端部的穿孔板椭圆形,梯纹至网纹增厚。次生木质部密材型,射线单列,一般低矮,管胞自内向外由梯状纹孔变为不规则拥挤分布的具缘纹孔,偶而可见木薄壁细胞。根据后生木质部中导管的穿孔板类型与低等被子植物Platanus acerifolia Willd相似,也讨论了被子植物的起源问题。  相似文献   

14.
通过对产自新疆柯坪地区的阿克苏柯坪珊瑚(Kepingophyllum aksuense)的大量薄片观察,发现该类珊瑚在珊瑚体单骸形态、横板带宽度与泡沫板带宽度之比、隔壁长度、横板的形态、隔壁数目、隔壁数目与珊瑚骸直径之比等六个方面存在很大变异。此外,该类珊瑚中存在明显的周期性生长变异现象,表现在泡沫板的排列疏密相间。与模式标本的对比研究发现,此类珊瑚的群体间变异相对较小。  相似文献   

15.
重新描述了湖南中泥盆世的锥石Changshaconus carinata Zhu,1985。通过比较,笔者认为Changshaconus与产自南非泥盆系和南、北美洲下泥盆统中的Reticulaconularia Babcock et Feldmann,1986非常相似。Changshaconus和Reticulaconularia两属由于锥管表面横肋间具有纵向脊状构造,与横肋构造一起构成了网状的表  相似文献   

16.
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18.
Lepidophylloides sp. and Saportaea cf. nervosa Halle were found in the Permian coal bearing strata (Lower Shihhotse Formation) from Huaibei coal field, Anhui, China. Lepidophylloides sp., leaves are linear. The longest one is more than 13cm in length. The specimens obtained show about 3–16mm width with single vein. The epidermal cells are re. ctangular with smooth walls. Stomata align in regular rows, widely spread, particularly, in the lower cuticle. Saportaea cf. nervosa Halle The lamina stomata composed of two reniform guard cells are slightly sunken, the lamina of Saportaea of. nervosa Halle is in broal shoveled shape with 5.6 cm in length, and 6.5 cm in width. Petiole is 1.6cm in length and about 8mm in width. At the upper end of the petiole, it divides into two branches. The veins appear from the branches of the petiole and divide by repeated dichotomy. In the upper part of the lamina, the veins become numerous (about 13 per centimetre). The epidermal cells are elongated polygonat to polygonal, with smooth walls. Stomata surrounded by 5-8 subsidiary cells.  相似文献   

19.
20.
A new fossil genus and combination of gigantopterides is reported. The specimen was collected from the Late Paleozoic "Longtan Formation” of Jiangle county, Fujian Province of China. It was originally determined to the genus Gigantonoclea and named as G. cardiophylla Zhu et Geng by one of the present authors and his colleague some times ago. In view of its venation being trinervious and that the incompletely duplicated net-like veins are close to those of gigantopterides and the leaf bears sori on its back. Upon reconsideration it was renamed by the authors as Trinerviopteris cardiophyUa (Zhu et Geng) Zhu gen. et comb. nov. At the same time. the authors have confirmed that it is a kind of true fern. In association with the new taxon there are Sphenophyllum emarginatum, Bowmanites lascus, Lobatannularia lingulata, Chansitheca pcdaeosilvana, Ch. cf. kidstonii, Pecopteris anderssonii, P. echinata, P. taiyuanensis, P. unita, Danaeites mirabilis, Fascipteris densata, Cladophlebis permica, Compsopteris contracta, Gigantonoclea chingii, G. fukienensis, G. sp., G. sp., Gigantopteris cordata, G. nicotianaefolia, Taenioteris serrulata, T. szei, T. tingii, Radicites sp. 1, R. sp. 2 etc. The present flora is more simplified than the others which discovered from different areas in the same geological time. Based on the grouping of these fossil plants, the geological era of the present flora must be late Early Permian to early Late Permian. Moreover it is emphasized that the gigantopterides is only but an artificial compound taxon not only including seed ferns but also true ferns and others.  相似文献   

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