鸭跖草

In this article the extracting technology of water-soluble polysaccharides of Common dayflower was probed.

以鸭跖草为原料，采用热水浸提，微波辅助热水浸提对鸭跖草中水溶性多糖的提取进行了研究，优化了提取工艺。

The pathogenic mechanism of toxin from Phoma herbarum to dayflower was studied through measuring cell membrane permeability, MDA content and activities of CAT, POD and APX. The result indicated that toxin increased permeability of cell membrane.

以草茎点霉毒素对鸭跖草叶片组织细胞膜透性、丙二醛含量、过氧化氢酶、过氧化物酶以及抗坏血酸过氧化物酶活性的影响，研究草茎点霉毒素对鸭跖草的致病机理。

In order to control dayflower application SYAU-06 strain successfully required mycelial suspensions concentration of 1.0×10~6 mL~(-1),7-9 days of culture time,3 leaf stag of host,28-32℃of temperature,over 80%relative humidity and at least 48h dew duration.

利用草茎点霉SYAU-06菌株成功控制鸭跖草危害，菌丝体的接种浓度要高于10~7mf·mL~(-1)，培养时间控制在7-9d，寄主植物鸭跖草处于3叶期前。

The research included host range,biological characteristics,infection process and infection influence factors of SYAU-06 strain as well as the herbicidal activity,extraction technology,action mechanism,biological safety,separation and purification technology and structure elucidation of phytoxin produced by the strain.The experiment provided a new method to biocontrol dayflower.

通过对SYAU-06活体菌株的寄主范围、生物学特性、侵染过程、侵染影响因子和毒素的除草活性、提取工艺、作用机理、生物安全性、分离提纯技术研究以及结构解析，从活体菌株和毒素两个方面系统评价了SYAU-06菌株防除鸭跖草的潜力，为鸭跖草的生物防治提供新的方法和思路。1。

However, the phylogenetic relationships among Asparagales, Liliales and commelinoids are still uncertain in current analyses. In commelinoids, the relationships of Arecales and Poales still need more research in future.

在鸭跖草类复合群分支内，鸭跖草目和姜目的姐妹群关系在3个序列联合分析和2个序列联合分析的严格一致树中均得到强烈的自展支持，获得的支持率均是100%。

In the present study a link was established between copper accumulation in hyperaccumulator and non-accumulator species of Commelina communis and its responses of antioxidative enzymes, including superoxide dismutase, guaiacol peroxidase, and ascorbate peroxidase.

我们发现，鸭跖草一个亚种可以在体内超积累大量的铜，并且生物量很大，还发现鸭跖草不同植物亚种间对铜的吸收有不同的生理反应，其中有一种超积累植物叶片中可以积累0.1%的铜。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C.

论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C. communis grown in normal soil. Several aspects were examined, including: difference of copper tolerance and accumulation between C. communis grown in copper mine deposit and that grown in normal soil; difference of growth and nutrient accumunation between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; physiological differences between between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; subcellular distribution and chemical forms of Cu in C. communis; identification of cDNA fragments differentially expressed in C. communis grown in copper mine deposit; genetic diversity and copper tolerance of C. communis, tolerance mechanisms to copper in C. communis are discussed.

中文题名鸭跖草对铜的耐性机理和富集特征研究副题名外文题名 Mechanisms of Cu tolerance and accumulation by Commelina communis 论文作者廖斌导师蓝崇钰束文圣学科专业环境科学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2003 论文页码总数128页关键词重金属污染植物修复超富集植物土壤污染铜污染鸭跖草馆藏号BSLW /2003 /X53 /12 论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Communis grown in soil get minimum at 320μmol/L of Cu.

显示矿山鸭跖草对铜具有强耐性，非矿山鸭跖草对铜敏感。

Our data suggest that C. communis grown in mine deposit has evolved a Cu tolerant ecotype.

表明矿山鸭跖草积累铜的能力与外界铜浓度有关，矿山鸭跖草积累铜的能力比非矿山鸭跖草强。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐