根系

32P isotope tracing technique was used in this study,and the results indicated that phosphorus stored or pre-existed in roots would be remobilized in maize under phosphorus deficiency from root cortical cells with lysis to shoot mostly rather than root apex during aerenchyma formation.

Kraus等的试验表明玉米根系从土壤中吸收的32P可在根皮层内保留15 d，之后逐渐减少[2]。这意味着与叶片的情形相似，根内也进行着磷的活化和再运转。当植物处于磷胁迫下时，根系吸收的磷素远不能满足植物各器官生长发

Longitudinal root sections of the wild type and the gls mutant cultured in nutrient solution for 4 days showed that biosynthesis and distribution of amyloplast in the columella cells of gls were normal as compared with the wild type, suggesting that root gravitropism loss in gls mutant is not caused by the defect in amyloplast sedimentation, but possibly by the disturbance of auxin transport and distributation.

4天龄的根系纵切片结果显示：突变体gls根尖结构完整，根尖柱细胞内淀粉粒的生成和分布正常，表明gls突变体根系向地性的缺失不是由于淀粉体的原因，而可能通过影响生长素运输和分布造成。

The results showed that the apolar fraction of the root exudates from the highly resistant cultivars could kill the pathogen. Those of the general resistant cultivars could inhibit the spore germination and hyphal growth,while the sensitive cultivars couldn't.

荧光显微镜观察结果表明：高抗枯萎病的品种根系分泌物的有机成分对病原菌孢子有致死作用，中抗品种的对病原菌孢子萌发、菌丝的生长有显著抑制作用，相反感病品种的根系分泌物则能够起促进作用。

The brace root number could indicate the root system and root activityduring grain filling stage.

气生根量是根系发达和花后根系活力直观的诊断指标，与花后物质积累量及产量呈正相关。

More than 70％ of the amount of ethion, dicofol and cyhalothrin uptaken by canna maintained at roots and this ratio increased with the decreasing of water solubility of the pesticide.

美人蕉吸收的乙硫磷、三氯杀螨醇和三氟氯氰菊酯中，有70％以上富集于植物根系中，且在根系中的富集程度随农药水溶解度的下降而增加。

As to Catalpa ovata G.,'the root growth was enhanced by low level pollution, while limited by high level pollution.

对梓树苗木则为，低浓度的石油污染对苗木根系生长有促进作用，而高浓度的石油污染对根系生长有抑制作用。

Numerical simulating of the regulation was made. The mathematics model of water movement and the experience model of water absorbing were constructed for tomato, basing on the study on the characteristic of its root distribution. Movement of soil water was simulated, and the front of nitrogen was forecasted, using the piston flow model.

根据温室滴灌西红柿的实际情况，在对西红柿根系分布特征的田间试验分析的基础上，建立了滴灌西红柿水分运动数学模型和西红柿根系吸水经验模型，对田间土壤水分动态进行了模拟，运用简化的氮素运移活塞模型对土壤中氮素溶质锋面进行了预测。

In the experiment, wheat (NongDa 189) plants were grown on a sand culture in a greenhouse. Relationship between leaf area and characteristic of root branching of winter wheat seedlings were studied, In addition, effects of phosphorus deficiency on leaf area, root morphology and measuring methods of root architecture were studied.

试验选用农大189号小麦为试验材料，进行温室内砂培试验，研究了冬小麦苗期积温、叶面积与根系分枝之间的关系，并探讨了磷胁迫对冬小麦苗期叶面积及其根系构型参数(主轴数量、长度、直径等)的影响，结果表明： 1。

The seedling status, the seedling characters and chlorophyl content of maize,cotton and groundnut after seed soaking with root and seedling promoter were investigated.

根系是组成和维系作物生长发育的重要功能器官，在一定生态和栽培条件下的作物，其地上部生长发育状况的好坏或经济产量的高低，在很大程度上是其对根系适应的反应。

Associated it we define a root system. In a suitable condition we define a Lie algebra to realize this root system, namely, using an Euler cocycle given by intersection matrix, we define an infinitely dimensional vector space with the Lie operation becomes a Lie algebra.

在适当的条件之下，我们给出了该根系的一个李代数实现，即利用该相交矩阵确定的一个欧拉cocycle和根系，我们定义了一个无限维向量空间和李运算，并且证明了这个无限维向量空间在该李运算之下构成一个李代数。

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。