基于美国国立生物技术信息中心(National Center of Biotechnology Information,NCBI)中下载的43种石斛的全叶绿体组序列,对43个物种间的亲缘关系进行研究。结果显示:(1)叶绿体基因的碱基组成显示T、C、A、G碱基平均含量分别是31.8%、19...基于美国国立生物技术信息中心(National Center of Biotechnology Information,NCBI)中下载的43种石斛的全叶绿体组序列,对43个物种间的亲缘关系进行研究。结果显示:(1)叶绿体基因的碱基组成显示T、C、A、G碱基平均含量分别是31.8%、19.0%、30.7%、18.5%;(2)通过遗传距离分析发现,铁皮石斛、黄石斛、始兴石斛和铁皮石斛中科院Ⅳ号的遗传距离最小,为0。说明这4种石斛在遗传上比较近,与其他种之间亲缘关系均较远。(3)系统发育关系显示石斛属植物是一个单系群,其中梳唇石斛是最先分化出来的,其次是竹枝石斛;细茎石斛、霍山石斛、广东石斛具有较近的亲缘关系。展开更多
The polysaccharide and amino acid ingredients of 8 species in Dendrobium Sw. and Flickingeria A. D. Hawkes were analysed.\ TheresultsshowedthatDendrobiumhercoglossumRchb. f.contained the highest quantity of polysaccha...The polysaccharide and amino acid ingredients of 8 species in Dendrobium Sw. and Flickingeria A. D. Hawkes were analysed.\ TheresultsshowedthatDendrobiumhercoglossumRchb. f.contained the highest quantity of polysaccharide (30.56%), but D. terminale Par. et Rchb. had the least quantity (8.97%). Flickingeria fimbriata (Bl.) Hawkes contained the highest quantity of total amino acids (19.922 9 mg·g-1). The contents of aspartic acid and glutamic acid were rich in all species and leucine had the largest proportion (27%) in the total essential amino acids (no including tryptophan)展开更多
目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石...目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石斛D end robium lodd ig esii以外的8种植物。结论线粒体nad 1 in tron2序列可以作为一种新的分子标记用于石斛属植物的鉴定。展开更多
文摘基于美国国立生物技术信息中心(National Center of Biotechnology Information,NCBI)中下载的43种石斛的全叶绿体组序列,对43个物种间的亲缘关系进行研究。结果显示:(1)叶绿体基因的碱基组成显示T、C、A、G碱基平均含量分别是31.8%、19.0%、30.7%、18.5%;(2)通过遗传距离分析发现,铁皮石斛、黄石斛、始兴石斛和铁皮石斛中科院Ⅳ号的遗传距离最小,为0。说明这4种石斛在遗传上比较近,与其他种之间亲缘关系均较远。(3)系统发育关系显示石斛属植物是一个单系群,其中梳唇石斛是最先分化出来的,其次是竹枝石斛;细茎石斛、霍山石斛、广东石斛具有较近的亲缘关系。
文摘The polysaccharide and amino acid ingredients of 8 species in Dendrobium Sw. and Flickingeria A. D. Hawkes were analysed.\ TheresultsshowedthatDendrobiumhercoglossumRchb. f.contained the highest quantity of polysaccharide (30.56%), but D. terminale Par. et Rchb. had the least quantity (8.97%). Flickingeria fimbriata (Bl.) Hawkes contained the highest quantity of total amino acids (19.922 9 mg·g-1). The contents of aspartic acid and glutamic acid were rich in all species and leucine had the largest proportion (27%) in the total essential amino acids (no including tryptophan)
文摘目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石斛D end robium lodd ig esii以外的8种植物。结论线粒体nad 1 in tron2序列可以作为一种新的分子标记用于石斛属植物的鉴定。