胚根

According to SHSM model and branching characteristics of the young maize radicels, four states were adopted for describing the branching process of the young maize radicels, and criterion of dividing states depends on length and branch coefficient of first lateral root.

本次实验中把胚根产生的分支划分为4种状态，划分标准是胚根产生一级侧根的长度与一级侧根分支系数。

Mycorrhizal seedlings were cultured. Results were as the follow. 5. 1 Soaking seeds with 4cm radicle in GA (100ppm) for 24 hours and low temperature (2～4℃) for 25 days could absolve the dormancy of epicotyl.

通过对牡丹菌根化苗的培养观察认为： 5.1 胚根伸长4cm以上的种子用GA（处理24小时）和低温（2～4℃）25天皆可解除牡丹种子上胚轴休眠。

And Cucumis sativus L. were tested by bioassay-guided separation. The extracts from P. tomentosa flower with ethanol were extracted with petroleum ether, ethyl acetate and n-butanol. The inhibition rate of the ethyl acetate extract to growth of the 3 kinds of plant radicel were 99.89%, 63.53% and 32.74% respectively at 0.5 mg/mL concentration, and that of petroleum ether were 76.30%, 56.17% and 23.36%.

绒叶泡桐Paulownia tomentosa花乙醇提取物依次用石油醚、乙酸乙酯、正丁醇和水萃取后进行活性测定，结果表明，石油醚萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为76.30%、56.17%和23.36%；乙酸乙酯萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为99.89%、63.53%和32.74%。

From the beginning of germination, radicle spread out and down from the seed capsule.

植物从种子萌发开始，胚根从种皮中伸出并向下生长，这种从胚中长出的根称为主根，随着生长过程的进行，又会在主根上长出侧根，而当侧根长到一定的时候又会长出次一级的侧根，这样不断生长就形成了一个植物的根系。

Observation on the ultrastructure of the radicle cell of cabbage seeds indicated that the ultrastructure changed with the seed vigor reduced, such as the segregation of cytoplasm from the cell wall, the fragmentation of cell membrane, the vesiculation of protoplasm, the homogenization of chromation, the disintegration of cytoplasm, the distinguishing of nuclear membrane and nucleous ,and so on.

胚根细胞亚显微结构电镜观察结果，甘蓝种子通过人工老化活力降低后，胚根超微结构发生了变化，主要表现为：质壁分裂，细胞膜内陷或局部断裂，细胞质空泡化，细胞器难以辨认，染色质均质化，核仁和核膜的界限模糊等现象。

Stems angular, glabrous. Radical leaves: stipules brown, membranous, abaxially glabrous; petiole glabrous; leaf blade with 7–9 pairs of leaflets; leaflets petiolulate, green on both surfaces, fasciated or fasciated lanceolate, 5–7 × 1.5–1.7 cm, both surfaces glabrous, base subcordate to obliquely truncate or rounded, margin acutely incised serrate, apex rounded to acute; cauline leaves: stipules green, falcate, herbaceous, margin incised serrate; leaf blade resembling that of radical leaves but leaflets fewer and narrower higher up stem.

茎具角，无毛；胚根叶：托叶使成褐色，膜，背面无毛；叶柄无毛；叶片具7-9对小叶；具小叶柄的小叶，绿色在两面，扁化或者扁化， 5-7 * 1.5-1.7 厘米，两面无毛，基部近心形在斜截形或圆形，边缘尖锐锐裂状锯齿，先端圆形的到锐尖；茎生叶托叶绿色，镰刀形，草本，给锐裂状锯齿镶边；叶片象胚根叶的那但是高的更少和狭窄的小叶向上茎。

The influences of temperature were significant to the peroxydase activity in cotyledons and radicles and that of salinity was extremely significant to the peroxydase activity in cotyledons and radicles.

温度对子叶和胚根中的过氧化物酶活性有显著影响，盐度对子叶和胚根中过氧化物酶活性有极显著影响。

The results indicated that MDA of both the radicles and cotyledons increased extremely significantly under the low and the high temperature treatments compared with the control, whereas the SOD activities decreased.

结果表明：温度胁迫使胚根中TSP含量均较常温显著或极显著降低，子叶中的TSP含量在低温处理下极显著高于对照，而在高温下与之相反；温度胁迫下，各豇豆品种胚根和子叶中MDA含量均较显著或极显著高于对照；SOD活性变化与之相反，但品种间有差异。

To sample the radicles and cotyledons respectively while the radicles was 1 cm long, the total soluble protein, the malondialdehyde content, the activites of superoxide dismutase, the catalase and the peroxide enzyme were determined.

确定供试种子批种子活力正常后，在萌发种于胚根长到1 cm时，分胚根和子叶两个部位取样测定其可溶性蛋白质含量、丙二醛含量及超氧化物歧化酶、过氧化氢酶和过氧化物酶活性等生理指标。

This paper studied branching characteristics of the young maize radicels with growth ages 9 and 19 days using potted experiment in greenhouse under the condition of no stresses of water and nutrients based on simplified hidden-semi Markov model.

摘要控制玉米植株生长在不受水分，养分胁迫的条件下，采用室内盆栽实验方法，以播种后生长了9天和19天的玉米(农大108)胚根为研究对象，基于简化的隐式半马尔科夫模型，分析了玉米胚根的分支特性。

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。