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菝葜属7个种的染色体数目 总被引:2,自引:1,他引:2
傅承新;沈朝栋;钟国庆;洪德元 《武汉植物学研究》1992,10(4):381-382
菝葜属(Smilax)是菝葜科(Smilacaceae)中的一个主要成员,以前常作为百合科(Liliaceae)的一个属。该属植物多为木本(少数为草本),雌雄异株,常攀援生长,是热带、亚热带森林和山地的常见类群之一。对该属的细胞分类学研究我们已作了一些工作。本文对我们最近的研究结果,7个种的染色体数目作一报道,其中5种为首次记载(见表1和图版Ⅰ)。 相似文献
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栝楼属8种植物的染色体数目 总被引:2,自引:0,他引:2
栝楼属8种植物的染色体数目黄潞琦,乐崇熙,李懋学(中国中医研究院中药研究所,北京100700)(北京大学生物系,北京100871)关键词栝楼属,染色体数目CHROMOSOMENUMBERSOF8SPECIESINTRICHOSANTHES¥HUANG... 相似文献
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吴永忠;房淑敏;张海道 《武汉植物学研究》1992,10(4):383-384
我国巴戟天属(Morinda)植物约有8种,产西南至台湾,本属药用植物有5种,其中巴戟天(Morinda officinalis How)是著名的南药,具有补肾壮阳、强筋骨、祛风湿的功效。本文对巴戟天属4种药用植物的根尖体细胞染色体进行观察和计数,为巴戟天属提供细胞学资料。实验材料采自广东、福建、海南栽培或野生植株的成熟种子。1.巴戟天(Morinda officinalis How),广东高要,栽培,吴永忠7139,福建南靖,栽培,吴永忠7191;2.双华巴戟(M. 相似文献
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国产十四种苋属植物的染色体数目 总被引:5,自引:0,他引:5
报道了国产14种苋属植物的染色体数目。部分种的染色体数目为2n=34,即反枝苋Amaranthus retroflexus,刺苋A.spinosus,红苋A.cruentus,腋花苋A.roxburghianus,合被苋A.polygonoides,皱果苋A. viridis,凹头苋A.lividus,苋A.tricolor。其他种的染色体数目为2n=32,即尾穗苋A.caudatus,绿穗苋A. hybridus,千穗谷A.hypochendriacus,繁穗苋A.paniculatus,北美苋A.blitoides,白苋A.albus。其中腋花 苋的染色体数目为首次报道。该属染色体基数为x=16,17。两种染色体基数在苋属2个组(sect.Ama- ranthus和sect.Blitopsis)中均存在。由于苋属植物染色体大多为小型染色体,因此对苋属植物目前尚不 能进行详尽的核型分析。 相似文献
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This is the third report of chromosome numbers of Umbelliferae after 1981 and1985, which deals with 24 species and varieties of 15 genera including 2 endemic genera and10 endemic species, and most of them are distributed in southwestern China. Of them, 18counts are newly reported. The taxonomic significance is discussed in relation with theirbasic numbers, translocation heterozygote and polyploids. It is considered that polyploids arewide-spread in Hydrocotyle L. 4, 6, 7, 8 are the basic numbers of Bupleurum L. which provides the cytological evidence for further study on their evolutionary process. n=9 and 10occurrespectively in two different sections of Pimpinella L. and their basic numbers may beused for classification at the section level. The ring formation of four chromosomes at diakinesis of Heracleum henryi Wolff reveals that translocation heterozygotes is one of the factorsin specific differentiation of Umbelliferae. 相似文献
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This paper reports the chromosome numbers of 74 species of scattered bamboos growing in China, 65 of which are first reported. 相似文献
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7种国产野生经济植物的染色体数目张渝华,邱江峰(浙江省医学科学院药物研究所杭州310013)关键词7种植物,染色体数目CHROMOSOMENUMBERSOFSEVENWILDECONOMICPLANTSFROMCHINA¥ZhangYuhua;Qiu... 相似文献
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两种珍珠菜属植物染色体数目及核型的观察 总被引:7,自引:2,他引:7
田先华;朱必才;朱昌其 《武汉植物学研究》1990,8(4):390-392
狼尾花(Lysimachia barystachys Bunge)和腺药珍珠菜(L. stenosepala Hemsl.)是珍珠菜属(Lysimachia)的两种植物。该属植物全世界约有180种,我国有120种左右。截止目前,本属植物中已作过染色体计数的种类不多,尤其在国内有文献报道的更是屈指可数,仅见庄灿旸等关于滨海珍珠菜(L. mauritiana Lam.)的报道。因 相似文献
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五种苏铁属植物的核形态 总被引:4,自引:0,他引:4
报道了苏铁属(Cycas L.)5种植物的染色体数目和核型,除多歧苏铁外,其他种均为首次报道。5个种的体细胞中期染色体核型公式分别为:滇南苏铁C.diannanensis K(2n)=2x=22=2m 4sm 4st 12T;潭清苏铁C.tanqingii K(2n)=2x=22=2m 8sm 2st 10T;多歧苏的Cmultipinnata K(2n)=2x=22=4m 8st 2st 8T;巴兰萨苏铁C.balansae K(2n)=2x=xx=2m 4sm 6st 10T。石山苏铁C.miquelii K(2n)=22=2m 6sm(1SAT) 4st 10T;核型均属于3B型。本研究结果支持苏铁属植物的核型从不对称进化的观点;同时,支持将巴兰萨苏铁和石山苏铁归入攀枝花苏铁组的台湾苏铁亚组的观点。 相似文献
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报道五种苏铁的染色体数目和核型,其中红河苏铁 (Cycas hongheensis)、叉孢苏铁 (C.segmentifida)和十万大山苏铁 (C.shiwandashanica) 为首次报道。 相似文献
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In a review of chromosome numbers in the genus Potamogeton, we highlight numerous errors that have crept into the literature. These have resulted chiefly from reliance on abstracts in chromosome number indices and compilations, rather than on the original publications, but partly also because of misleading summaries even in the primary literature. We present a list of counts that we believe are original and genuine, and a list of those that were never made but which nevertheless appear in the literature. Scrutiny of the list of accepted counts indicates that aneuploidy is widespread in the genus and that transition between the two common chromosome numbers (2n=26 and 2n=28) has occurred several times. Currently available data are insufficient to resolve the question of the ancestral base number. We also present details of the first chromosome counts from English populations of five taxa: P. polygonifolius Pourr. (2n=28), P. pectinatus L. (2n=ca. 78), P. perfoliatus L. (2n=ca. 52), P.×nitens Weber (P. gramineus×P. perfoliatus) (2n=ca. 52) and P.×salicifolius Wolfg. (P. lucens×P. perfoliatus) (2n=ca. 52). 相似文献