oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Karyomorphology of four species in Ancylostemon, Briggsiopsis and Lysionotus (Gesneriaceae)
直瓣苣苔属、筒花苣苔属和吊石苣苔属4个种的核形态学研究

王印政,顾志建
植物分类学报 , 1999,
Abstract: 本文报道了苦苣苔科直瓣苣苔属Ancylostemon、筒花苣苔属Briggsiopsis和吊石苣苔属Lysionotus 中4个种的染色体数目和核形态。凹瓣苣苔A.aureus的染色体数目为n=34,与其近缘种凸瓣苣苔 A.convexus的染色体数目相同。该种的核型公式为2n=20m(1sat)+14sm,核型类型属于2A。间期核 为复杂染色中心型(complex chromocenter type);细胞有丝分裂前期的染色体为近基型(proximal type) 我国特有单种属筒花苣苔属Briggsiopsis的间期核为简单—复杂染色中心型(simple-complex chromocenter type);细胞有丝分裂前期的染色体为中间—渐变型(interstitial—gradient type);核型公式为2n=34=25m +6sm+3st,与近缘类群——粗筒苣苔属Briggsia染色体数目2n=34,68相比,无论染色体数目还是核 型均显示比较原始的特征。吊石苣苔属的蒙自吊石苣苔L.carnosus和翅茎吊石苣苔L.serratus D. Don var.pterocaulis的核型公式分别是2n=30=21m+5sm+3st+1t和2n=32=21m+10sm+1t。核 型类型分别属于2A和2B。间期核均为简单—复杂染色中心型(simple-complex chromocenter type);细胞 有丝分裂前期的染色体为渐变型(gradient type)。
KARYOTYPES OF WHYTOCKIA(GESNERIACEAE )
异叶苣苔属(苦苣苔科)的核型研究

王印政,顾志建
植物分类学报 , 1998,
Abstract: 本文首次报道了中国特有异叶苣苔属的染色体数目及核型。该属所研究种类的染色体数目均为 2n=18,染色体长度在2.0μm以上,在尖舌苣苔族所报道的染色体中显示出较原始的性状。尖舌苣苔 族的染色体基数可能是x=9。异叶苣苔属的间期核均为复杂型;前期染色体呈渐变型。核型从对称型 向不对称型的演化主要表现在近中部着丝粒,尤其是近端部着丝粒染色体比例的增大。毕节异叶苣苔 W.bljieensis和峨眉异叶苣苔W.tsiangiana var.wilsonii的核型分别为2n=2m+8m+8sm(1sat)和 2n=2m+8m(1sat)+8sm(2sat),较为对称。紫红异叶苣苔W.purpurascens和白花异叶苣苔W. tsiangiana var. tsiangiana的核型分别为2n=4m+6sm+8st(1sat)和2n=4m+8sm(2sat)+6st,比较 特化。河口异叶苣苔W.hekouensis的核型是2n=4m+10sm(1sat)+4st,处于二者之间。峨眉异叶苣 苔和原变种白花异叶苣苔的核型差异较大,在外部形态方面二者之间的性状变异也间断较大。本文建 议将该变种从白花异叶苣苔W.tsiangiana中移出自成一种,并和毕节异叶苣苔近缘。
Karyotypes of Whytockia (Gesneriaceae)
异叶苣苔属(苦苣苔科)的核型研究

WANG Yin-Zheng,GU Zhi-Jian,HONG De-Yuan,
王印政
,顾志建,洪德元

中国科学院研究生院学报 , 1998,
Abstract: 本文首次报道了中国特有异叶苣苔属的染色体数目及核型。该属所研究种类的染色体数目均为 2n=18,染色体长度在2.0μm以上,在尖舌苣苔族所报道的染色体中显示出较原始的性状。尖舌苣苔 族的染色体基数可能是x=9。异叶苣苔属的间期核均为复杂型;前期染色体呈渐变型。核型从对称型 向不对称型的演化主要表现在近中部着丝粒,尤其是近端部着丝粒染色体比例的增大。毕节异叶苣苔 W.bljieensis和峨眉异叶苣苔W.tsiangiana var.wilsonii的核型分别为2n=2m+8m+8sm(1sat)和 2n=2m+8m(1sat)+8sm(2sat),较为对称。紫红异叶苣苔W.purpurascens和白花异叶苣苔W. tsiangiana var. tsiangiana的核型分别为2n=4m+6sm+8st(1sat)和2n=4m+8sm(2sat)+6st,比较 特化。河口异叶苣苔W.hekouensis的核型是2n=4m+10sm(1sat)+4st,处于二者之间。峨眉异叶苣 苔和原变种白花异叶苣苔的核型差异较大,在外部形态方面二者之间的性状变异也间断较大。本文建 议将该变种从白花异叶苣苔W.tsiangiana中移出自成一种,并和毕节异叶苣苔近缘。
Aeschynanthus hildebrandii Hemsl. ex Hook. f. (Gesneriaceae) - A new record for China
唇冠芒毛苣苔——中国芒毛苣苔属一新记录种

高天刚
植物分类学报 , 2002,
Abstract: 唇冠芒毛苣苔 Aeschynanthus hildebrandii Hemsl.ex Hook.f.在中国首次记录。
Taxonomy of the Genus Oreocharis (Gesneriaceae)
马铃苣苔属(苦苣苔科)的分类

Pan Kai-Yu,
潘开玉

中国科学院研究生院学报 , 1987,
Abstract: The genus Oreocharis as circumscribed here consists of 27 species including 5 varieties, of which 5 species and 4 varieties are described as new in the present paper. In the work analysed were the external morphology and geographic distribution and examined under SEM were pollen exine of 22 species and seed coat of 16 species. As a result, three types of the corolla, two types of the anther, three types of the pollen exine and three types of the seed coat are distinguished here in the paper. It is discovered that the corolla in the genus is relati- vely stable, though diverse, and highly correlated with the characters of pollen grains and seeds. The corolla clearly bilabiate but constricted at the throat, occurring in O. auricula, O. cordatula, O. aurantiaca, etc., for an example, is correlated with smooth, reticulate pollen exine and partial tectum and the reticulate and smooth seed coat. For this reason the subdivision of the genus in the paper is mainly based on the characters of the corolla, but combined with those of the anther, pollen and seed coat. The genus is divided into four sections in the present clas- sification. Dasydesmus Craib, based on a single species. O. bodinieri, is reduced here, and the reasons are given. The genus is distributed mainly in the subtropics, and less frequently in the tropics, of China south of 32.5°N and east of 98.5°E, with only two species beyond the border, O. hirsuta in Thailand (only a single locality in Chiengmai) and O. aurea also found in north Vietnam (see Fig. 1, Table 3). Sect. 1. Stomactin (Clarke) Fritsch. Corolla urceolate-tubular, constricted at the throat, with limb distinctly bilabiate; anthers broad-oblong; seed coat reticulate, smooth, rarely minu- tely tuberculate; pollen exine fine-reticulate, tectum partial and smooth, luminae slightly unequ- al in size. Sect. 2. Orthanthera K. Y. Pan Corolla campanulate or campanulate-tubular; anthers bro- ad-oblong; seed coat reticulate, muri smooth, rarely spiny-processed; pollen exine fine-reticulate, with partial and smooth tectum and luminae slightly unequal in size, rarely exine insular and fine-tuberculate, tectum perforate. Setc. 3. Oreocharis Corolla thin-tubular; anthers broad-oblong; seed coat densely spiny- processed, rarely fine-tuberculate; pollen exine insular, densely spiny-processed, rarely fine- reticulate and smooth, luminae unequal in size. Sect. 4. Platyanthera K. Y. Pan Corolla campanulate; anthers hippocrepiform; seed coat densely spiny-processed; pollen exine fine-reticulate, tectum perforate, luminae small, nearly equal in size. In the section Stomactin, although the constriction of corolla at its throat is a specialized character, the characters of seed coat, pollen grains and anthers are apparently primitive. The- refore it may be said at least that more primitive characters are preserved in the section. In the section Oreocharis, on the contrary, the characters of corolla, seed c
Paralagarosolen Y. G. Wei, a new genus of the Gesneriaceae from Guangxi, China
广西苦苣苔科一新属——方鼎苣苔属

WEI Yi-Gang,
韦毅刚

中国科学院研究生院学报 , 2004,
Abstract: 报道了在中国广西发现的苦苣苔科一新属即方鼎苣苔属Paralagarosolen Y. G. Wei 和一新种方鼎苣苔P. fangianum Y. G. Wei。方鼎苣苔属与细筒苣苔属Lagarosolen W. T. Wang近缘,它们的共同特征是花筒细筒状,不肿胀,柱头2;不同点是方鼎苣苔属叶基部有时盾状,聚伞花序具1朵花,花冠裂片顶端圆钝,蒴果宽卵状椭圆球形。
Hemiboea rubribracteata Z.Y.Li & Yan Liu, a new species of Hemiboea (Gesneriaceae) from Guangxi, China
广西半蒴苣苔属(苦苣苔科)一新种--红苞半蒴苣苔

李振宇,刘演
植物分类学报 , 2004,
Abstract: 报道了在广西发现的苦苣苔科半蒴苣苔属Hemiboea一新种,即红苞半蒴苣苔H. rubribracteata Z.Y.Li & Yan Liu.该新种叶形与贵州半蒴苣苔H. cavaleriei Lévl.相近,不同在于茎较粗且坚硬,总苞红色,萼片较长,花冠外面白色,无毛,下唇3裂至中部.
保连横蒴苣苔,福建苦苣苔科一新种
Beccarinda baolianis,A New Species of Gesneriaceae from Fujian Province
 [PDF]

林沁文
植物研究 , 2016, DOI: 10.7525/j.issn.1673-5102.2016.05.003
Abstract: 描述了在福建发现的苦苣苔科横蒴苣苔属一新种,保连横蒴苣苔。本种以花萼绿色,5裂至中部,雄蕊4枚分生而区别于本属其它种。
Wentsaiboea D.Fang & D.H.Qin, a new genus of the Gesneriaceae from Guangxi, China
广西苦苣苔科一新属--文采苣苔属

Abstract,
方鼎
,覃德海

植物分类学报 , 2004,
Abstract: 描述了在广西发现的苦苣苔科一新属和一新种,即文采苣苔属Wentsaiboea D. Fang & D. H. Qin及文采苣苔W. renifolia D. Fang & D. H. Qin, 并提供墨线图.文采苣苔属的柱头外形略似长檐苣苔属Dolicholoma D. Fang & W. T. Wang, 不同在于前者叶肾形,基部心形,具掌状脉,花冠斜钟状,裂片圆形,雄蕊和退化雄蕊着生于冠筒近基部.新属在体态上还接近小花苣苔属Chiritopsis W. T. Wang, 但前者叶具掌状脉,冠筒钟状,远轴侧膨胀,柱头马蹄形;在后者叶具羽状脉,冠筒筒状,不膨胀,柱头下唇倒梯形至线形.
Pseudochirita guangxiensis var.glauca Y.G.Wei & Yan Liu, a new variety of the Gesneriaceae
异裂苣苔属(苦苣苔科)一新变种--粉绿异裂苣苔

韦毅刚,刘演
植物分类学报 , 2004,
Abstract: 报道了在广西发现的苦苣苔科异裂苣苔属一新变种,即粉绿异裂苣苔Pseudochirita gtmagxiensis(S.Z.Huang)W.T.Wang var.glauca Y.G.Wei & Yanuu。它与原变种的区别在于叶近全缘或有不明显的钝锯齿,茎和叶背、叶面密被近贴伏的绒毛,花冠外疏被腺毛。
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.