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本文分析了该新种的核型,其核型公式为K(2n)=2x=16=14m+2st(2SAT),具一对居间随体,有时该居间随体不明显。核型的不对称性为2A型。 相似文献
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本文对国产葱属根茎组的8种植物进行了染色体研究,发现染色体数目2n=16或32,核型属2A
或2B型,对称性较高。其染色体数目和核型分别为:Allium leucocephalum 2n(2x)=16=12m+2sm
+2st(2SAT); A,strictum 2n(4x)=32=16m+4sm+12st;A.ramosum 2n(2x)=16=14m+2st
(2SAT); A.bidentatum 2n(4x)=32=24m+4sm+4T;A.tenuissimum 2n(2x)=16=10m+4sm+
2st(2SAT),A.anisopodium 2n(2x)=16=12m+2sm+2st(2SAT);A.anisopodium var.zimmermanni
anum 2n(4x)=32=24m+4sm+4st(4SAT); A.condensatum 2n(2x)=16=14m+2st(2SAT)。多数种的染色体资料为国内首次报道。 相似文献
3.
部分葱属(Allium)植物细胞的无丝分裂研究 总被引:1,自引:0,他引:1
无丝分裂常被人们认为是只存在于低等植物中,是高等植物中不正常的或偶然见到的细胞分裂方式。本文报道近期对部分葱属植物的细胞分裂方式研究情况,确定无丝分裂是健康植株表皮组织细胞的主要分裂方式,并对无丝分裂的各种表现形式、分裂高峰时间作了详细的报告,对细胞无丝分裂的机理也作了探索性的分析。 相似文献
4.
簇生葱中总黄酮的提取及其含量测定 总被引:2,自引:0,他引:2
以芦丁为对照品,确定了以乙醇为溶剂的簇生葱中总黄酮的最佳提取条件,在此条件下黄酮的得率为3.98%. 相似文献
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石铸 《中国科学院研究生院学报》1987,25(1):39-49
About 22 species of the genus Scorzonera L. are so far known to occur in China.
Among them, S. pamirica Shih is described as new and 3 species, S. tau-sahyz Lipsch. et Bosse,
S. pubescens DC. and S. transiliensis M. Pop., are new records to China. Four names in the
literature are reduced to synonyms,and some wrong identications in Chinese botanical literature
are pointed out in this work. Some species with considerable variation in morphology, such as,
S. pseudodivaricata Lipsch. and S. sinensis Lipsch. ex Krasch., are also discussed here. 相似文献
7.
葱属粗根组和根茎组6种11个居群的染色体数目和核型的研究结果如下:A.cyathophorum:
2n=2x=16=12m+4sm(2SAT)。A.przewalskianum:西藏察雅和四川理县居群分别为2n=4x=32
=28m+4st(2SAT)and 2n=4x=32=28m+2sm+2st(2SAT)。A. polyrhizum :2n=2x=20m+8sm+
4t(2SAT)。A.mongolicum:2n=2x=16=14m+2st(2SAT)。A.senescens:朝鲜郁陵岛和中国内蒙古
科尔沁左翼后旗居群分别为2n=4x=32=28m+2sm+2st(2SAT)and 2n=4x=32=24m+4sm+4st
(2SAT)。A.tuberosum:所研究的四个居群中,山西永济居群为二倍体,2n=2x=16=14m=2st
(2SAT),另三个分别来自四川的理县、汶川玉龙和成都三瓦窑的居群均为四倍体,2n=4x=32=28m
+4st(2SAT)。A.przewalskianum,A.polyrhizum and A. mongolicum的核型为首次报道;并首次
在中国发现了A.tuberosum的野生二倍体居群。此外,还讨论了栽培韭的起源以及A.cyathophorum,A.przewalskianum和A. senescens种内居群间的核型分化问题。 相似文献
8.
本文对葱属植物对动物特异性免疫-细胞免疫和体液免疫及非特异性免疫-免疫器官、自然杀伤性细胞等方面的调节作用进行了综述, 为开发、应用新型免疫制剂及饲料添加剂提供了科学理论基础. 相似文献
9.
对近年来葱属植物主要挥发性物质的研究进行了综述,不同研究组对同一种葱属植物的主要挥发性物质所得结果不尽相同,对可能的原因进行了分析,在此基础上提出常温下进行葱属植物挥发性物质的测定方法 -顶空技术与表面增强拉曼技术结合的方法,给出本课题组初步的实验结果。 相似文献
10.
Turmeric has long been used as a spice and food colouring agent in Asia. In the present investigation, the antimutagenic potential of curcumin was evaluated in Allium cepa root meristem cells. So far there is no report on the biological properties of curcumin in plant test systems. The root tip cells were treated with sodium azide at 200 and 300 μg/ml for 3 h and curcumin was given at 5, 10 and 20 μg/ml for 16 h, prior to sodium azide treatment. The tips were squashed after colchicine treatment and the cells were analyzed for chromosome aberration and mitotic index. Curcumin induces chromosomal aberration in Allium cepa root tip cells in an insignificant manner, when compared with untreated control. Sodium azide alone induces chromosomal aberrations significantly with increasing concentrations. The total number of aberrations was significantly reduced in root tip cells pretreated with curcumin. The study reveals that curcumin has antimutagenic potential against sodium azide induced chromosomal aberrations in Allium cepa root meristem cells. In addition, it showed mild cytotoxicity by reducing the percentage of mitotic index in all curcumin treated groups, but the mechanism of action remains unknown. The antimutagenic potential of curcumin is effective at 5 μg/ml in Allium cepa root meristem cells. 相似文献