三叶草

The results indicated the following: 1 All of the root, stem, leaf and bud of Ambrosia trifida have higher biosorption capability for Cu~(2+).

本论文获得的主要结论为： 1三裂叶豚草的根、茎、叶、花蕾四个部位对Cu~(2+)具有较强的吸附作用，且吸附能力的顺序为叶＞花蕾＞茎＞根。

Common ragweed and giant ragweed (Ambrosia trifida L.) were deleterious weed all over the world. They effected not only on production and life in our country but on local ecosystem.

普通豚草和三裂叶豚草是世界性公害杂草，二者不仅对我国人民的生产和生活带来了严重危害，而且对当地的生态系统产生了明显的影响。

Ampelopsis delavayana and Humulus scandens have relative longer internode and relative higher stem growth rate than Parthenocissus tricuspidata .

卷须攀援的三裂叶蛇葡萄和缠绕攀援的葎草的茎的伸长速率较快，节间较长，而吸附攀援的爬山虎则攀援速度相对较缓慢。

According to diseased leaf rate,disease index and reduction in fresh weight,the influence factors of SYAU-06 strain infection dayflower were studied from three aspects of biocontrol fungi,host developmental stages and environment condition.

以病叶率、病情指数和鲜重抑制率3项指标为原则，从生防真菌自身的生物学特性、杂草的发育阶段和环境条件三个方面研究SYAU-06菌株侵染鸭跖草发病的影响因子。

The results of physiological indexes analysis under different salt stress condition showed that cell membrane permeability of all species increased along with the increasing of NaCl concentration, and concentrations of Na+, Cl-, proline, soluble sugar, saccharose and malondialdehyde showed the same tendency.

不同盐浓度胁迫下各项生理生化指标的测定结果表明：随着盐胁迫强度的增加，四种植物的膜透性增大，Na+、Cl-、脯氨酸、可溶性总糖、蔗糖和丙二醛含量都呈增大的趋势，高碱蓬和镰叶碱蓬的Pro含量增加迅速，明显比盐角草和盐爪爪高，盐角草Na+、Cl-含量明显高于其它三种植物，K+、Ca2+、Mg2+、叶绿素含量，过氧化物酶、超氧化物岐化酶和过氧化氢酶活性和K+/ Na+都呈下降的趋势。

The Shatterstone is a common weed of Spurge family (for the family's characteristics, please refer to the 886th issue of Academia Sinica Weekly) on campus.

在《周报》第886期介绍了大戟科植物特徵，以及飞扬草、千根草和伏生大戟三种植物，这次继续介绍本科的常见杂草－叶下珠。

Any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petalled flower.

延龄草属的多种百合科植物之一，三片叶在茎顶端轮生，花单生、有三片花瓣。

A total of 19,781 insect individuals belonging to 959 morphospecies, 145 families and 15 orders were collected. The most abundant orders were Diptera (69.68%), Homoptera (11.19%) and Hymenoptera (10.10%). At the family level, Chironomidae (17.67%), Mycetophilidae (12.32%), Cicadellidae (8.32%), Ceratopogonidae (7.56%), Sciaridae (7.39%) and Cecidomyiidae (5.81%) were the most abundant taxa. Although there were little differences in similarity among the three sampling plots, the dominant orders and families in theses plots differed. The meadow had the highest diversity while the spruce forest had the lowest diversity.

结果：三样区共采集到19，781只昆虫，分属15目、145科、959个形态种；各目的组成百分比，以双翅目(69.68%)、同翅目(11.19%)及膜翅目(10.10%)最为优势；在科的类阶，则是以摇蚊科(17.67%)、蕈蚋科(12.32%)、叶蝉科(8.32%)、糠蚊科(7.56%)、黑翅蕈蚋科(7.39%)及瘿蚋科(5.81%)为优势类群；三个样区的相似度差异不大，但是优势类群则不相同；无论丰度、均匀度及多样性指标，箭竹草原样区均高过於云杉林样区及铁杉林样区。

Therefore, the LsHNXs genes were cloned in this study, and their function was studied by RNAi. The main results were shown as follows:1 The conservative sequences of three LsHNXs genes (LsHNX1, LsHNX2, and LsHNX3), and the 3'-terminal specific sequences of LsHNX2 and LsHNX3, were cloned by RT-PCR and 3'-RACE.2 The plant RNAi vectors were constructed and the transformation of Limonium sinense was done. The RNAi lines of three single-genes and one double-gene were obtained and were propogated rapidly for the molecular and the stress tolerance analysis.3 To be compared with wild type, the Na+ and K+ contents secreted by the leaves of LsNHX1 transgenic plants were remarkably higher.

主要实验结果如下：1采用RT-PCR和3'-RACE方法从补血草中克隆获得LsNHXs基因家族三个成员LsNHX1、LsNHX2和LsNHX3的保守区序列以及LsNHX2和LsNHX3的3'端特异序列。2构建植物基因RNAi沉默表达载体并转化补血草，获得三个单基因和一个双基因的RNAi沉默表达植株，快繁转基因植株供分子鉴定和耐逆分析。3LsNHX1转基因植株叶片表面分泌物中的Na+、K+离子含量比野生型对照显著增加；叶组织内Na+离子含量和K+离子含量均略高，但差异不显著；K+/Na+比没有显著差异。4LsNHX2转基因植株叶片表面分泌物中的Na+离子含量比野生型对照有所下降，但差异不显著；K+离子含量比对照显著降低。

The effect of drought stress on water state, relative electric conductance rate, osmotic regulation matter and protective enzyme activity in Curvedleaf Indian Lovegrass, Selloa Pampasgrass and Chinese Pennisetum were studied with pot control water method.

用盆栽控水的方法研究土壤干旱胁迫对弯叶画眉草、蒲尾、狼尾草三种观赏草水分状况、相对电导率、渗透调节物质和保护酶活性的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。