木兰属

The sequences of segments of the trnL intron from 29 species and trnL-trnF IGS from 21 species of Magnoliaceae were analyzed. The results from the strict consensus trees were consistent with the former systems ① several species within the genera Michelia were homologious;② the subgenera Yulania was extremely homologious and much far from subgenera Magnolia;③ the species within Manglietia were highly conservative.

通过木兰科29个种的trnL基因内含子的525个碱基序列及21个种的trnL-trnF基因间隔区的370个碱基序列测定和分析，构建的严格一致性树建议：①含笑属为相对一致的单系类群；②玉兰亚属的几个种形成一个单系类群，与木兰亚属的几个种无共衍位点；③木莲属为个相对保守的类群，种间碱基差异很小。

The results of UPGMA duster analysis based on RAPD and ISSR fingerprint had the approximate trend, but not the same.(5) The synthetical comparison of RAPD and ISSR sustained the independency of Liriodendron, Manglietia, Parakmeria and Tsoongiodendron, and advised to redefine the range of Magnolia, subgen. Yulania indepent from Magnolia, then established Yulania, and abolished the division of subgenera and section Michelia, and set up Michelia.

基于RAPD标记和ISSR标记构建的树图，两者趋势大致相近，但不完全相同；(5)综合木兰科6属20种植物的RAPD和ISSR分析结果，支持鹅掌楸属、木莲属、拟单性木兰属和观光木属的独立；建议重新界定木兰属的范围，并成立玉兰属；建议取消含笑属下亚属和组的划分，设为含笑属。

Magnoliaceae ; Michelia ; Paramichelia ; Tsoongiodendron ; veinlet ; taxonomy.

木兰科；含笑属；合果木属；观光木属；盲脉；分类学意义

Results of sampling showed that the typical evergreen broad-leaved forest of Mt. Jiulianshan consisted mainly of subtropical families and genera with dominant families including Fagaceae, Lauraceae, Camelliaceae, Styracaceae, Ericaceae, and Magnoliaceae.

群落主要由热带、亚热带科属组成，优势科为壳斗科Fagaceae，樟科Lauraceae，山茶科Camelliaceae，安息香科Styracaceae，杜鹃花科Ericaceae和木兰科Magnoliaceae等科，优势树种以相应的优势科属树种为主。

Oil cell is one of marked features of the leaf anatomy of the Magnoliaceae.

另外，木莲属植物叶片的结构与木兰属具有明显差异，因而进一步证明木莲属是不同于木兰属的一个独立的属。

The 1 039 bp sequences of the chloroplast matK gene from nine species relating to Parakmeria and Kmeria of Magnoliaceae were determined.

测定了木兰科拟单性木兰属等10种(11个样)植物的叶绿体DNA matK基因部分序列(1 039碱基对)。

The results showed as follow:(1) The method of improved CTABⅠequal to extract Magnoliaceae genomic DNA was developed, because the extracted DNA by the method was suitable for RAPD and ISSR analysis.(2) Single factor design combing uniform design was used to obtain optimum scheme on reaction system for RAPD and ISSR of Magnoliaceae.

研究结果如下：(1)建立了适合于木兰科6属20种植物DNA提取的改良CTAB法Ⅰ，用该法提取的DNA能满足RAPD和ISSR分析的要求；(2)采用单因素结合均匀试验设计优化得到适合于木兰科6属20种植物RAPD和ISSR分析的PCR体系。

Randomly amplified polymorphic DNA and inter-simple sequence repeat markers were used to analyse the genetic diversity and relationships of 20 species in 6 genera from Magnoliaceae and compare the genetic difference among generas with inner genera, combining the other research results, the systematic of 20 species in 6 genera was primarily discussed. The purpose of this study was to provide scientific basic data for systematic and other research on Magnoliaceae.

应用RAPD和ISSR标记对木兰科6属20种植物的遗传多态性和亲缘关系进行分析，比较属间、属内的遗传差异，并结合前人的研究结果，对木兰科6属及属下类群的系统位置进行探讨，旨在为木兰科植物的系统分类及其它研究提供实验依据。

Flowers appear before the leaves as in some species of magnolias.

例如某些木兰属品种的、在叶子之前出现的早成花。

Precocious flowers appear before the leaves as in some species of magnolias.

例如某些木兰属品种的、在叶子之前出现的早成花。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷