检索结果-南通市图书馆

A new flavonoid from the bract of Zea mays L.

Chinese Chemical Letters 2010年第11期21卷 1350-1351页

作者： Yan Wang Yin Yan Liu Xiao Hong Yang Di Chen Cheng Peng Guang Shu Wang School of Pharmaceutical Sciences Jilin University Changchun 130021 China The Third Hospital Jilin University Changchun 130012 China

A new flavonoid was isolated from the bract of Zea mays *** structure of the compound was identified as 4＇,5,7-trihydroxy-3＇,5＇-dimethoxyflavone 7-O-[β-D-apiofuranosyl（1→2）]-β-D-glucopyranoside on the ground o... 详细信息

关键词： Zea mays L. Flavonoid bract

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pollinator attraction in Cornus capitata (Cornaceae): the relative role of visual and olfactory cues

引用

Journal of Plant Ecology 2015年第2期8卷 173-181页

作者： Bo Song Yang Niu Jürg Stöcklin Gao Chen De-Li Peng Yong-Qian Gao Hang Sun Key Laboratory for Plant Diversity and Biogeography of East Asian Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650201YunnanChina Section of Plant Ecology Institute of BotanyUniversity of BaselSchönbeinstrasse 6Basel 4056Switzerland Kunming Botanical Garden Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650201YunnanChina Department of Ecology and Environmental Engineering Yunnan Forestry Technological College1 Chuanjin RoadKunming 650224YunnanChina

Aims it is generally accepted that visual displays and floral scent play important roles in communication between flowering plants and their ***,the relative role of visual and olfactory cues in pollinator attraction is largely *** this study,we determined the roles of both types of cue in attracting pollinators to Cornus capitata,a medium sized tree with each capitulum sur-rounded by four large,white,petaloid *** Pollinator observations and pollination experiments were con-ducted in a natural population;the inflorescences’visual and olfactory signals were characterized by spectral and chemical analyses;the responses of pollinators to visual and olfactory cues were tested using dual-choice behavioural bioassays;the relative roles of visual and olfactory cues in pollinator attrac-tion were tested by comparing the responses of pollinators to inflorescences subjected to three experimental treatments(intact,all bracts removed,and capitulum removed)within the natural *** Findings For fruit set,*** is entirely dependent on pollinators,with a bee,Anthophora sp.,being the main *** present high colour distance and green contrast against the *** volatile compounds in the floral scent were detected,most of which have previously been reported to be attractive to a broad spectrum of bee *** bioassays showed that both,visual cues alone and olfactory cues alone,are attractive to pollinating ***,vis-ual cues alone attracted significantly more approaches than olfactory cues alone,while olfactory cues alone elicited a significantly higher landing percentage than visual cues *** finding suggests that,in the ***-Anthophora ***,visual cues are mainly used for location from long distances,while olfactory cues mainly aid landing from short *** results indicate that different modalities of floral cues should be considered together to understand fully

关键词： bract floral scent olfactory cues spectral reflectance visual cues

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Origin and Identity of the Calyculus in Loranthaceae:Inferred From the Floral Organogenesis of Loranthus tanakae Franch.&Sav.

引用

Phyton-International Journal of Experimental Botany 2019年第3期88卷 285-293页

作者： Ruozhu Lin Bei Cui Wenxia Zhao Research Institute of Forest Ecology Environment and ProtectionChinese Academy of ForestryBeijingChina Research Institute of Forestry Chinese Academy of ForestryBeijingChina

The flowers of the hemiparasitic family Loranthaceae are always subtended by a rimmed structure known as the *** origin and identity of the calyculus have been disputed for more than a *** hypotheses have been proposed,for example,an outgrowth of the axis,a reduced calyx,and a bracteolar(prophyllar)origin,but controversies *** obtain a plausible explanation of the origin of the calyculus,we investigated the flowers of Loranthus tanakae using scanning electron microscopy and light microscopy to observe the entire developmental process of the floral *** results show that bracts are not present in *** calyculus,which lacks serving vascular bundles,initiates as a semicircular primordium and then develops into a circular structure by an adnation at both *** flower primordium usually cleaves into six petals from its centre along a whorled pattern in two series with three petals each,before or after the calyculus *** stamen primordia probably follow the same initiation pattern as petals *** carpels of different sizes initiate simultaneously as a united *** support the hypotheses that the calyculus is of bract or bracteole origin due to its independent initiation from the inflorescence rachis,its similar morphology and positioning as the bract or bracteole,and that having no developmental relationship with the *** suggest keeping the usage of the term“calyculus”.Loranthus flowers should be considered monochlamydeous with three whorls of floral parts,namely petal,androecium,and gynoecium.

关键词： Monochlamydeous bract calyculus initiation whorled pattern

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on Chloroplast Ultrastructure in Different Color Period of Euphorbia pulcherrima

引用

Journal of Northeast Agricultural University(English Edition) 2008年第3期15卷 16-19页

作者： FU Jia NIU De WANG Lijuan College of Life Sciences Northeast Agricultural University Harbin 150030 China

By the observation of chloroplast ultrastructure in different period of bract colors of Euphorbia pulcherrima, the paper studied the change of chloroplast ultrastructural in the transition process of bract colors, identified the relationship between *** color change and the chloroplast ultrastructure to provide theorical bases for the cultivation management and further study of E. pulcherrima. Ultrastructural study showed that in the process of change from green to red, the chloroplast of bracts disintegrated gradually, lamellar structure was destroyed gradually, and the content of chloroplasts in mesophyll cells was also reduced gradually. When bracts color resumed to turn green gradually, the content of chloroplasts in mesophyll cells was also increased gradually.

关键词： Euphorbia pulcherrima bract chloroplast ultrastructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：