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1.
 中国竹亚科分类自70年代末以来取得了长足进展,但在高山竹类的属名、种类处理,青篱竹属在中国是否存在,以及丛生竹的属级界线等问题上,国内学者间,以及国内学者与国外学者间存在不同意见。读了林万涛关于中国牡竹属的两篇文章后,认为有必要就牡竹属的范畴作一讨论,其中也涉及国内竹亚科分类的若干方法论问题。根据分支系统学的原理,“广义牡竹属”是一个单系类群。参照Clayton对属级分类阶元提出的几条原则,特别是性状的选择,讨论了椅子竹属与碟环慈竹属的归属问题。笔者认为,数量分类学并不探讨类群的起源问题,研究系统发育则需要多学科的证据,因而单从营养体个别性状的相似性来推测系统发育是不可取的。最后本文归并了椅子竹属和碟环慈竹属。  相似文献   

2.
竹类果实与淀粉形态及系统位置   总被引:1,自引:0,他引:1  
本文收集了竹类5个族21属30种的竹类果实,作了外部形态与淀粉形态的研究,从而为确立 各竹属的系统分类位置提供了科学依据,进一步证实了浆果类果实不具有胚乳,从而认为Oreocalamus (Keng,1940),Qiongzhuea(薛纪如等,1979),Ferrocalamus(耿伯介等,1982)与Chimonobambusa Subg.Chimonobambusa系统位置更接近于Melocanneae(Keng,1940)。  竹类果实淀粉均为复粒结构。果实大小、淀粉粒大小与淀粉小粒相互之间有一定的联系。  相似文献   

3.
几种丛生竹维管束的研究   总被引:1,自引:0,他引:1  
 由于竹类不是经常开花,而营养器官又易发生变异,在分类上造成困难。本文着重将华南栽培的丛生竹类10属31种的竹秆,在秆的基、中、梢三个部位进行解剖,由外到内观察其横切面的维管束的不同结构、大小、形状和排列,编成4种维管束类型和31个种的检索表,试图探讨以维管束结构作为竹类的分类方法。  相似文献   

4.
本文采用聚丙烯(月+先)胺凝胶电泳法测定了5属28种竹叶的谷氨酸草酰乙酸转氨酶(GOT),过氧化物酶(POD)和酯酶(EST)三种同工酶。测定结果表明,GOT同工酶比较稳定,对于竹子分属有较好的意义;POD与EST同工酶种间分化大,可作为竹子分种的参考依据。根据三种同工酶的酶谱及相似系数分析,结合经典分类,对丛生竹分类中存在的疑难问题提出了一些参考意见。  相似文献   

5.
在中国文化史中,竹的特殊贡献尽显了竹文化的风采;竹,在中国思想史上,承载了一种全新的精神意蕴。本文分析研究了唐代女诗人爱竹、咏竹,用她的生命流程诠释竹文化的一生,概述了竹文化内涵和现实意义。  相似文献   

6.
在中国文化吏中,竹的特殊贡献尽显了竹文化的风采;竹,在中国思想史上,承载了一种全新的精神意蕴。本文分析研究了唐代女诗人爱竹、咏竹,用她的生命流程诠释竹文化的一生,概述了竹文化内涵和现实意义。  相似文献   

7.
 将异枝竹属Metasasa W.T. Lin作为酸竹属Acidosasa C.D.Chu et C.S.Chao ex Keng f.的异名处 理。异枝竹Metasasa carinata W.T. Lin和白环异枝竹 Metasasa albo-farinosa W.T.Lin作为新组合名Aci-dosasa nanunica(McCl.)C.S.Chao et G.Y.Yang,comb.nov.的异名。  相似文献   

8.
我国是世界上研究、培育和利用竹子最早的国家,竹也是中华民族气节的象征。本文从竹文化影响着中国人生活的方方面面出发,指出中国人的恋竹情结是建立在千百年来对竹的认识和开发利用基础上的。  相似文献   

9.
《科技风》2015,(15)
阐述了研究伞状自定心剖竹刀的技术背景及要解决的技术问题;提出了两种自定心剖竹刀的设计方案,通过对自定心剖竹刀工作原理的剖析,对比分析了方案的优劣;最后总结了伞状自定心剖竹刀具有适应性强和容易推广等特点。  相似文献   

10.
以<中国期刊全文数据库>和<数字化期刊全文数据库>中收录的1988~2007年发表在403种期刊上的1682篇竹类文献为研究对象,探讨竹类文献所属期刊及核心期刊的分布.以文献发表在核心期刊与非核心期刊的比例作为各类别竹类文献的重要值,分析自然科学各类别竹类文献的重要值及竹类研究的重点领域和研究热点,提出竹类研究的空白领域和未来竹类研究的重点领域和方向.  相似文献   

11.
本文报道了三种芸苔属植物的外部形态、种子解剖、花粉形态和染色体数目。研究结 果表明:新疆毛芥;黑芥;鸡冠菜;均是三个独立的种。其中1新种、1新等级。  相似文献   

12.
13.
In this paper the classification of the genus  Bergenia Moench is  provided, its geographic distribution analysed, and the phylogeny also traced.   Based  on an analysis of morphological characters such as leaves, ocreas, branches of inflorescences, Pedicels, hypan- thium, sepals, and glandular indumentum, thi genus is divided into 3 sections: 1. Sect. Scopu- losae J. T. Pan, sect. nov., 2. Sect. Bergnia, 3. Sect. Ciliatae (A. Boriss.) J. T. Pan, stat. nov. The Sect. Scopulosae J. T. Pan may be considered as the primitive one, while Sect. Ciliatae (A. Boriss.) J. T. Pan may be regarded as the advanced one, with Sect. Bergenia in between.         So far, the genus Bergenia Moench comprises 9 species in the total.  Southeast Asia and North Asia (south and east Siberia, USSR) each have only 1 species, West Asia (Afghanis- tan) has 2, Central Asia (Kirghizia-Tajikistan-Uzbekstan area, USSR) 3, South Asia 4 (Nepal has 4, India, Pakistan and Kashmir area each has 3, Bhutan and Sikkim each has 2), East Asia 6.  In East Asia, Mongolia and Korea each have only 1 species, but China has 6 (includ- ing endemic species 2 and new species 1).  Sichuan Province and Xizang Autonomous Region each have 3, Yunnan Province 2, Shaanxi Province (Qinling Mountains) and Uygur Autono- mous Region of Xinjiang each have only 1.        Thus the distribution centre of this genus  should be in the region covering Si- chuan, Yunnan and Xizang. Moreover, it is noteworthy  that Bergenia scopulosa T. P. Wang in Sect. Scopulosae seems to have retained primitive characters,  for exa- mple, non-ciliate leaves and ocreas, glabrous pedicels, hypanthium and  sepals,  and this primitive species is found in Qinling Mountains and Sichuan.  According to the distribution of the primitive species, the author suggests that the centre of origin of  this genus be in the region covering Qinling Mountains and Sichuan.  相似文献   

14.
描述了采自中国广西的苦苣苔科新种桂林蛛毛苣苔Paraboea guilinensis L. Xu & Y. G. Wei。新种体态及叶形接近厚叶蛛毛苣苔P. crassifolia (Hemsl.) Burtt,与后者不同在于叶革质,花序梗、花梗及花萼均无毛,花冠明显二唇形,蒴果不旋扭。  相似文献   

15.
中国散生竹类的数量分类和确定分类等级的探讨   总被引:1,自引:0,他引:1  
  In this paper, 21 species representing 13 genera were studied by means of humeri- cal taxonomic methodes.  One geographical and 52 morphological characters were used. The correlation coefficients were  computed by standardized data, and the various clus- tering methods were performed on the correlation matr x.  The UPGMA clustering method was selected as the optimal one and its results were shown in  the form of dendrograms.      We present a simple method to construct the joint and broken lines by which the boundary of the genera, subtribes and tribes in the dendrogram is determined.      By means of numerical taxonomic methods, we can easily work out a systematic dendrogram and the following taxonomic treatments are easily proposed:       (1)  Sasamorpha sinica (Keng) Koidz. should be reffered to the genus Sasa Makino & Shibata.       (2)  Pseudosasa amabilis (McClure) Keng f. should belong to the genus Pseudosasa Makino and should not be referred to the genus Arundinaria Michaux.       (3)  The genus Brachystachyum Keng should be considered as a separate one.       (4)  The genus Pleioblastus Nakai should not be combined with the genus Arun-dinaria Michaux, but kept as an independent one.  相似文献   

16.
中国毛茛科植物小志(廿二)   总被引:2,自引:0,他引:2  
 (1)揭示了铁线莲属以下演化趋势:萼片由开展到直立;雄蕊由无毛到有毛;雄蕊花丝由条形演 化到披针状条形或倒披针状条形;花药由长圆形演化到条形或狭条形;药隔不突出到在顶端突出;在雄 蕊被毛时,毛由少而短到多而长;此外花序由具花序梗和苞片到花序梗和苞片消失,以及由自当年生枝 叶腋生出转变到自老枝腋芽中生出。主要根据上述演化趋势,本文将我国铁线莲属各组及组下分类群做出新的排列。(2)描述了6新亚组,6新系,2新种,4新变种,给出了5新组合,4新等级和2新名。  相似文献   

17.
 In this revision, three species are recognised. A discussion is made on merging the genus Polysolenia into Leptomischus. Indopolysolenia burmanica Deb et Rout is reduced to a synonum of Leptomischus primuloides Drake.  A key to species is given below: l. Flowers larger, with corollas more than 2cm long.   2.Stipules 3-fid or torn;  Leaves narrowly lanceolate;  stigmas with 2 short obtuse     lobes  ......................................................  1.L. wallichii   2.Stipules entire;  leaves obovate to elliptic;  stigmas with 2 slender elongate lobes         .........................................................  2. L. primuloides 1.Flowers smaller, with corollas 6-6.5mm long;  stigmas with 2 lanceolate lobes       ..........................................................  3. L. parviflorus  相似文献   

18.
19.
报道了樟科油丹属一新种,即黄连山油丹Alseodaphne huanglianshanensis H. W. Li & Y. M. Shui。它产自中国云南东南部绿春县黄连山海拔840-1300 m的热带阔叶次生林中,在体态上与同一分布区内的云南油丹A. yunnanensis Kosterm.十分相似,但叶为长圆形或倒披针状长圆形(5-13×(0.8-)1.2-2.8 cm),明显较狭,两面几无蜂窝穴,总梗及果梗无毛,密被灰白色小瘤而不同。该新种也与油丹A. hainanensis Merr. 相似,但叶长圆形至倒披针状长圆形,坚纸质,先端锐尖或渐尖,两面几无蜂窝穴,侧脉每侧7-8条,果梗长5-7 mm,密被灰白色条形的小瘤而不同。  相似文献   

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