查询词典 vascular plants

This article reviewed on the definiens of allelopathy, allelochemical categories and interactants of them. Acting modes of the allelochemicals were discussed. The use of allelopathy and allelochemicals of plants to agriculture production was introduced. The existing problems and direction in the study on plants allelopathy were advanced in the end.

笔者综述了植物化感作用的定义，化感物质的种类及其相互之间的关系，化感物质的作用机制，并介绍了化感作用在农业生产中的应用及其前景，展望了化感作用研究的范围和方向。

Other courses like dendrology for gardening, taxonomy of seed plants, plant classification or plant systematics may be similar or overlap in some degrees. However, dendrology focuses on woody plants, especially on trees from gymnosperms and dicotylerdons of angiosperms. Dendrology for gardening is more suitable for students from specialties relating to gardening.

类似并可以在一定程度上起替代的课程为园林树木学、种子植物分类学、植物分类学或植物系统学，但树木学主要侧重于木本植物的分类，而且主要集中在裸子植物和被子植物的双子叶植物纲上中；园林树木学则主要适用于园林相关专业的学生。

Result The results showed that content of Pb and Zn in 10 kinds of greening plants in Jinggangshan Road was the highest, and the lowest in Jinggangshan University, they had obvious difference among 6 different regions. The plants could absorb Pb and Zn pollutants in different extent depending on pollutants and plant species. Cedrus deodara and Subina chinensis had higher absorption capacity to Pb with 4.84 mg/kg and 4.57 mg/kg, Pittoaporum tobira had the lowest absorption capacity to Pb with 0.38 mg/kg; Ligustrum japonicum had the highest absorption capacity to Zn with 37.58 mg/kg, Buxus microphylla had the lowest absorption capacity to Zn with 11.08 mg/kg.

结果］在所调查6个区域中，10种绿化植物叶片铅、锌含量较高的在井冈山大道，含量最低的在井冈山大学校园内，各区域不同植物叶片的铅、锌含量差异显著。10种绿化植物对大气铅、锌污染物均具有一定的吸收净化能力，并依污染物和植物种类的不同差异明显：对铅吸收量最高的植物为圆柏和雪松，分别为4.84 mg/kg 和4.57 mg/kg，最低为海桐，为0.38 mg/kg；对锌吸收量最高的植物为日本女贞，为37.58 mg/kg，最低为小叶黄杨，为11.08 mg/kg。

Enzymatic activity assay of oxalate oxidase in transgenic tobacco plants indicated that the germ in gene from monocotyledon, could be expressed in dicotyledon tobacco plants that resu;ted in the formation of homopentameric protein with enzymatic activity correctly.

酶活性检测表明，源于单子叶植物小麦的germin基因能够在双子叶植物烟草中表达并正常装配成具有酶活性的同源五聚体蛋白。

Even in the tropics many plants and trees still lose leaves and some plants and trees actually die; and these then break down in the soil continuing to provide the nutrients that the plant or tree kingdom requires to continue to grow and subsist.

甚至在热带许多植物和树仍然会落叶，并且有些植物和树实际上会死去；之后这些死去的植物树木在土壤中分解从而为植物或树木王国提供维生与成长的营养素。

The best optimum conditions of the Agrobacterium mediated genetic transfornation were that leaves explants were immersed in the diluter 10 times Agrobacterium bacilli at OD600 of 0.6 for 8 minutes after being pre-cultured for 2 days,and then co-cultivated for 3 days.Then these explants were transferred to selected and rooting medium which contained 50 mg/L Kanamycin and 500 mg/L Carbenicillin.According to the transformation system, 54 transgenic plants were initially screened,then after PCR analysis and RT-PCR analysis 25 transgenic plants were obtained.

根癌农杆菌介导的芪合酶基因遗传转化的最佳条件为：将预培养2 d的烟草外植体，用稀释10倍的GV3101菌株菌液（OD600=0.6）浸染8 min后，共培养3 d，然后转入含卡那霉素50 mg/L和羧苄青霉素500 mg/L的筛选分化培养基上诱导分化，待抗性芽长到2～3 cm后，转入含Km 50 mg/L和Cb 500 mg/L的筛选生根培养基上进行筛选，在以上最佳遗传转化条件下，初步筛选到54株转化体，经PCR和RT-PCR检测获得25株转化烟草植株。

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本公司专业生产和经营：国产进口双光牛皮纸、压合牛皮纸、淋膜牛皮纸、票据打印纸，包装牛皮纸，精制牛皮包装纸、牛卡纸、单光纸、书写纸、绝缘纸、单、双面拷贝纸、单、双面铜板纸、灰底白板纸、白底白板纸、新闻纸、国产/进口双胶纸、棉纸、及BOPP光膜，亚膜等各类工业用纸及特殊包装用纸，办公用纸和食品用纸，品种共1800多种，涉及行业有玻璃厂、玩具厂、制衣厂、鞋厂、印刷厂、纸品包装厂、胶粘制品厂、铝材厂、食品厂，光学仪器厂、皮具厂、线路板厂、PCB电路板厂、覆铜板厂、大型电子厂、电镀厂等。

As a parameter describing the direction and amount of water movement in the body of plants,water potential is a fundamental physiological parameter of plants which plays important role in many fields of scientific research.

植物水势是一个决定植物体中水运动方向和限度的物理量，也是植物水分生理中一个基本度量单位。

They can tell the difference between healthy plants and plants that are diseased.

它们可以区别健康的和患病的植物。

Article 17 On discovering through quarantine inspection that import plants, plant products or other quarantine objects are contaminated with diseases, pests or weeds dangerous to plants, the port animal and plant quarantine office shall issue the Quarantine Treatment Notice notifying the owner or his or her agent to conduct such treatments as disinfection and disinfestation, returning or destruction.

第十七条输入植物、植物产品和其他检疫物，经检疫发现有植物危险性病、虫、杂草的，由口岸动植物检疫机关签发《检疫处理通知单》，通知货主或者其代理人作除害、退回或者销毁处理。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。