查询词典 Hamamelidaceae

Phylogenetic relationships among these families and within the Hamamelidaceae have been key questions in studies of angiosperm systematics and evolution.

这些科之间的谱系关系以及金缕梅科内部的谱系关系是研究被子植物系统和进化的主要问题之一。

General speaking, the floral ontogenetic observations recorded in the present research and in the literature reveal a noticeable diversity of characters which share no common basic pattern in the Hamamelidaceae.

通过对本研究发现的新证据和文献中记载的资料分析表明金缕梅科的花发育的特征无明显的共同式样。

DNA sequence data of the rbcL gene, the matk gene, and the internal transcribed spacers of nuclear ribosomal DNA involving 14 species representing the Cercidiphyllaceae. Eupteleaceae. Platanaceae, Tetracentraceae. and all the subfamilies of the Hamamelidaceae have been investigated in the present study.

本研究测定了包括连香树科、领春木科、悬铃木科、水青树科和金缕梅科内所有亚科代表共计14个种的rbcL基因，matK基因和18S-26S核核糖体内转录间隔区的序列，并结合原有资料对所有低等金缕梅类及其相近类群进行了分支分析。

The families Cercidiphyllaceae, Daphniphyllaceae, Hamamelidaceae and Saxifragaceae are closely located, while the relationships among them remain unsolved even if more repres...

尽管增加了金缕梅科的取样密度，它们之间进一步的关系仍未得到分辨，结合它们的形态特征，连香树科和交让木科应置于金缕梅目内。rbcL基因树上反映出传统的&低等&金缕梅类成员领春木科与毛茛类植物聚在一起；悬铃木科与昆栏树科和水青树科关系较近，而与金缕梅科关系较远；杜仲科与低等金缕类的核心科———金缕梅科的关系似乎较除连香树科之外的其它低等金缕类成员近。低等金缕类植物由一些古老、孤立的科组成，且是多系的。

The"lower"Hamamelidae traditionally consists of seven families, namely Eupteleaceae, Trochodendraceae, Tetracentraceae, Cercidiphyllaceae, Myrothamnaceae. Platanaceae and Hamamelidaceae.

传统的低等金缕梅类包含7个科，即领春木科、昆栏树科、水青树科、连香树科、折扇叶科、悬铃木科和金缕梅科。

A total of 26 tree species (DBH≥3.0cm) were recorded within 5 plots in the forest, which belong to 15 families and 21 genus. Fagaceae and Hamamelidaceae were dominant families. The vertical structure of the forest was simple, without obvious shrub and herb layers.

结果表明，5块样地内共出现树种26种，分属于15科21属，以壳斗科和金缕梅科为主；群落垂直结构简单，灌木层和草本层不甚明显。

Mainly Lauraceae, Fagaceae, Theaceae, magnolia Branch, Division of Hamamelidaceae evergreen broad-leaved trees such as the composition of the shrub layer are found to evergreen species, community structure is more complex.

主要由樟科、壳斗科、山茶科、木兰科、金缕梅科等科的常绿阔叶树组成，灌木层中亦多常绿种类，群落结构比较复杂。

Two new plants of Hamamelidaceae from Guizhou.

贵州金缕梅科的两个新植物。

The sequences of matK from 36 plant species in Hamamelidaceae have been accomplished and the sequences have been submitted to GenBank.

完成了金缕梅科36种植物matK基因的全序列测定，序列均已送国际联网数据库GenBanK登记。

Wo new plants of Hamamelidaceae from Guizhou.

itle 贵州金缕梅科的两个新植物。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。