根系

Experiment 5: Species diversity of AMF community colonized in roots of herbages in limestone and purple soil The species diversity of arbuscular mycorrhizal fungi in roots of various herbages were studied in this paper. Seventeen common herbages were selected as host plants of AMF colonization in this research and they were grown in limestone soil and purple soil, respectively.

试验5：石灰土上草本植物根系内丛枝菌根真菌多样性特征利用聚丙烯酰胺凝胶电泳和银染显影技术，比较了生长于石灰土和紫色土上的草本植物根系内的丛枝菌根真菌(arbuscular mycorrhizal fungi，AMF)群落的物种多样性特征。

The root vigor, height, diameter of stem, leaf area, shoot and root dry weight of the seedlings irrigated benzoic acid and ρ-hydroxybenzoic acid also decreaseded significantly.

用苯甲酸、对-羟基苯甲酸浇灌的幼苗，根系活力、株高、茎粗、叶面积、地上部和根系干重均显著低于对照。

Moreover, MeJA induced defense genes, such as pathogenesis-related proteins (PR2a), phenylalanine ammonia-lyase, BX9, and TPS. MeJA also increased DIMBOA and Vannillic acid content of leaves and roots significantly but leaf p－Hydroxybenzoic acid concentration was decreased significantly and Protocatechuric acid was produced in roots only.

1MeJA叶片处理能诱导叶片和根系中丙二烯氧化物环化酶基因、糖基转移酶（BX9）基因、苯丙氨酸转氨酶基因的表达，使叶片和根系中丁布含量升高，同时，6μL/L MeJA处理使第二叶中原儿茶酸含量显著降低，诱导根中产生原儿茶酸，使第二叶中香草酸含量和根中未知物质峰面积显著增大。

Most sugars, organic acids, phenolic acids and most amino acids increased significantly with elevated CO_2. The treatment, 950±50μmol·mol-1 CO_2 enrichment for 6 h every day had more obvious effects than the treatment, 950±50μmol·mol-1 CO_2 enrichment for 3 h every day. Levan, sucrose, arginine, oxalic acid, alanine, malic acid, acetic acid, lactic acid cinnamic acid,ρ- hydroxybenzoic acid and benzoic acid increased significantly.

CO_2施肥黄瓜根系分泌有机酸、氨基酸、糖和酚酸的总量增加，上、下午均施肥的处理分泌数量最多；CO_2施肥显著促进了果聚糖、蔗糖、草酸、苹果酸、乙酸、乳酸、多数氨基酸、肉桂酸、对羟基苯甲酸和苯甲酸等组分的分泌；单位鲜重根系分泌糖和酚酸的数量增加，多数氨基酸保持不变或降低，但有机酸分泌规律不一致。

In control, however,the weak expression ofCY3 mRNA can be found after 48 hours of chilling and showed little increase at the third day instress.

非逆境条件下，IPT对秧苗根系中mRNA的表达差异与对照相比没有很大的变化；低温胁迫3天后，IPT对根系中mRNA的表达影响很大，既能增强某些基因的表达，又能抑制另一些基因的表达；用DDRT-PCR技术，寻找到5个低温胁迫下在对照和IPT处理中差异表达的基因，其中CY3片段与水稻CDPK1和CDPK2的mRNA有很高的同源性，初步断定CY3在植株的抗逆反应中可能具有与CDPKs相似的功能；在Genbank中没有检索到与其它4个片段同源性比较高的已知序列；IPT处理中CY3表达量在低温处理24hr就有明显升高，以后随胁迫时间的延长其表达量不断加强；恢复常温后，CY3表达继续增加，在恢复第14天开始下降，下降速度缓慢，IPT对CY3的影响一直延续到苗末期，对照中CY3在低温胁迫48hr才有微弱表达，72hr后表达量并未增加许多；恢复常温后第4天就开始下降，很快降到最低。

Result］High concentration of leachates had significant inhibitory effects,but low concentration of leachates had no obvious effects in the initial stage and later stage after treatment.Low concentration of alcohol leaching liquor might had stimulating effects on SOD active.Water leaching liquor had no obvious effects,but higher concentration of alcohol leaching liquor had significant inhibitory effects on root vigor.

结果］在油松针叶水提液和醇提液处理后的初期（10 d）和后期（30 d）的抑制作用仅在高浓度处理；低浓度醇提液对草坪草'抢手股'SOD活性可能有促进作用；水提液对根系活力没有明显的影响，较高浓度的醇提液对根系活力有明显的抑制作用。

Carbendazim residue in root-mixture and leachate was studied using large, intact soil monolith lysimeters, and the method of determining carbendazim residue was briefly described.

对高尔夫球场草坪施用多菌灵后其根系层和淋溶水中的残留进行了模拟试验，并简要介绍了草坪根系层和水样中多菌灵农药的测定方法。

In this study, the contents of DDTs in shoots and stems varied obviously with maizes and pastures, even among eight maize cultivors.

本文的主要研究成果如下：（1）供试牧草茎叶和根系中DDTs的含量均显著高于玉米，墨西哥玉米等品种茎叶和根系中DDTs的含量也显著高于其它玉米品种。

It is safe to water deeply during the fall, and in fact is better than a shallow watering because the plants have taproots. It is important to let the soil dry out quite a bit between waterings: it should not still be wet when you water again.

在秋季将土壤浇水浇透比浅浅的浇水更加有利于生石花的生长，因为生石花是自根系的，有利于根系对水分的吸收。

At the late stage of stress (10 d), the chlorophyll degradation of own-root was accelerated, salt ion destroyed chlorophyll photosynthetic structure, the Pn, Tr and Gs of own-root plant were still significantly decreased, Ci was significantly increased, while Ls was significantly decreased, WUE was significantly decreased because the decreasing extent of Pn was more obvious than Tr, leading to a poor water use.

自根苗和嫁接苗叶片和根系中脯氨酸、可溶性糖、可溶性蛋白质含量在胁迫初期均会被诱导上升，随着胁迫时间的延长，有的持续上升，有的显著下降，但嫁接苗与自根苗相比，不论叶片还是根系中，各指标均显著高于自根苗，渗透调节能力相对较强。

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。