根系

The results indicated that the types and contents of amino acids examined were different in these root exudates.

研究结果表明：感病品种根系分泌物能够刺激胞囊的孵化，而抗病品种根系分泌物对胞囊的孵化未表现明显刺激作用。

The effect of soybean and corn root exudates on soil aggregate size and its stability were conducted.

采用土培试验将玉米和大豆植株根系分泌物添加到黑土中，25℃培养30 d，研究根系分泌物对土壤水稳性团聚体大小和稳定性的影响。

The results showed that diploid and tetraploid had higher root activity, flagleaf soluble protein content, SOD and CAT activity before anthesis. However, the rootactivity, flag leaf soluble protein content, SOD and CAT activity of diploid and tetraploiddeclined more quickly and became lower than those of hexaploid species from 15 days afteranthesis. While MDA content increased more quickly and became higher than those ofhexaploid species from 5 days after anthesis. Correlation analysis showed that delaying the flag leaf senescence can promoted transfer of nitrogen and dry matter, increasedaccumulation of nitrogen and dry matter after anthesis, enhanced grain and protein yield.

结果表明，与普通小麦和小黑麦相比，二倍体和四倍体材料开花以前具有比较高的根系活力、可溶性蛋白含量、SOD和CAT活性；开花以后，根系活力、旗叶可溶性蛋白含量、SOD和CAT活性快速下降，MDA含量快速上升，衰老加快；相关分析表明，延缓小麦旗叶衰老进程，可以促进花后氮素和干物质运转，增加花后氮素和干物质积累，提高籽粒产量和籽粒氮素积累量。

The results showed that the occurrence of Fusarium wilt was earlier when treated with the root exudates of Jinyan 4, and the infection rate was significantly higher at 15 days after inoculation, but nearly the same as the control at 20 days after inoculation.

结果表明：感病品种根系分泌物处理的黄瓜枯萎病发病早，接种后第15天病株率显著高于对照，至第20天时病株率与对照相近；而抗病品种根系分泌物处理的病株率一直显著小于对照。

The study was focused on the amount of available water in soil, hydraulic conductivity in soil-root system from different root zones, sap flow from root to stem, compensatory effect of root water uptake, the fruit growth and physiological attibutes, evaporation and transipiration, and plant water use efficiency. Experiment plants involved apple tree, grape, peach, etc. Fruit trees were irrigated in both half root zones or water was continuously supplied to the one-half and the other half kept dry(fixed partial rootzone irrigation, F), or water was alternatively supplied to two halves (alternative partial rootzone irrigation, A).

项目通过水平或垂直方向交替滴灌、固定局部滴灌及均匀灌溉方式，研究根区土壤湿润方式改变对果树根系微生态系统水分有效性、水分传导、根系吸水补偿效应、根茎液流、生长生理状况、蒸发蒸腾及水分利用效率的影响。

Therefore, this paper studied effects of different PPT concentrations on root growth and development under hydroponic cultur in greenhouse.

本研究在温室内水培条件下用不同浓度PPT处理棉花幼苗根系，研究PPT对棉花根系发育的影响及其生理机制。

Root system and plant growth responds to enlargement of population isochronous, all of them reduced with enlargement of population, root reduced especially.

玉米根系和与地上部的生长发育对群体扩大的反应具有同步的，二者均随群体的增扩大而消弱，以根系的消弱最为明显，且生育后期这种抑制现象越严重。

The Zn concentration in leaf and leafstalk increased with increasing Zn supply from 0 to 160 mgL^(-1), but had no increase or even decreased when the Zn supply was higher than 160 mgL^(-1). The Zn concentration in root exhibited a positive correlation with Zn supply and its exposure time, and the kinetic curve of Zn uptake fitted linear-quadratic model, i.e., fast linear uptake first and slow saturation uptake later, with the dividing point at about 1-2 hours' exposure, which could be related with the Zn adsorption on root cell wall and the Zn transportation across the cell membrane.

在0160 mgL^(-1) Zn处理下，植株叶片和叶柄Zn含量随Zn处理水平的提高显著增加，Zn浓度大于160 mgL^(-1)后，植株叶片和叶柄Zn含量不再随介质中Zn浓度的提高而增加，根系含Zn含量与介质中的Zn浓度和培养时间呈正相关，且根系Zn吸收动力学曲线具有二型性，即开始为快速的线性吸收，随后是较缓慢的饱和吸收，两者分界点约在12h，这可能分别与根细胞壁吸附Zn和Zn跨根细胞膜运输有关。

It seems important to find a good approach for nondestructive investigation of plant root systems.

植物根系传统研究方法的局限性迫切需要寻求一种无损性的根系探测技术。

In order to provide more references for the suitability determination of eco-concrete for planting,four kinds of eco-concretes with different void statuses were fabricated,in which Paspalum notatum Flugge was planted,and the growth of the plant was observed.

为了完善植生型生态混凝土适生性的判据，拌制了4组不同孔隙状态的生态混凝土，在其上种植百喜草，考察了百喜草的表观生长情况，测定了百喜草植物体内的脯氨酸含量、根系吸收面积及根系活力。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。