生根的

This paper summarized the technology progress of tissue culture of Anthurium andraeanum, included the sources of explants,the different culture mediums, the sort and content of the hormones, the different carbon source.

文章介绍了在红掌的组培快繁方面的研究进展，对外植体的选择，不同基本培养基、激素、碳源对其增殖与分化的影响，以及生根壮苗的方法等进行了综述。

The result showed that with the increasing of density, plant height was increased, stem diameter and ear diameter was decreased, ear was shorten, rare top length、No. of ear nod、ear height was increased;brace root number and total root number was decreased, the rate of root dry weight was increased within farming layers; population dry matter accumulation was increased and plant dry matter accumulation presented the opposite trend; ear linage、kernels per ear、100-kernels weight、double-ear rate、plant yield was decreased, yield was increased and decreased successively.

结果表明：随群体密度的增加植株高度增高、茎粗、穗粗变细、果穗变短，秃尖长度、穗位节数和穗位高度呈现增加的趋势；气生根与总根数减少，耕层根系干重比例增加；群体干物质积累量随密度增加而增加，单株干物质积累量呈相反的趋势；穗行数、穗粒数、百粒重、双穗率、单株产量均随密度的增加而减低，群体产量先增后降。

The results indicated that the content of MDA and root-shoot ratio were increased, but the dry weight of root, total root length, secondary root number, root activity, the SOD activity of root, the height of plant and aboveground dry weight of broomcorn millet decreased significantly with drought treatment regardless of fertilizing or not.

不同施肥水平下黍子根系对干旱胁迫的生物学响应研究表明，无论施肥与否，拔节期或抽穗期干旱胁迫均会使黍子根重、根长、根活力、次生根数、根系SOD活性及株高与地上部干重明显降低，MDA含量明显增高；水分胁迫解除后，黍子根系增长迅速，表现出明显的补偿效应和根系对水分反应敏感的特点，但干旱造成的不利影响在后期未能完全补偿。

Two specieses, Lycoris radiate and Lycoris aurea, were selected for the studying of artificial propagation in vitro. A few specieses of Lycoris, from the southeast area of China and part of locations in Japan, were chosen to research their karyotype differentiation and to measure their genetic diversity by ISSR analysis. The results could be summarized as follows.1. The vegetative propagation conditions of Lycoris aurea and L. radiate in vitro was studied by two-scaling. Different illuminate condition had an effect on the bulblet formation rate. To the species of L. radiate, the rate was higher in the state of 16h 800-12001x illumination than in the darkness. The medium also affected the new bulblet formating rate. When the culture was MS medium 0.2 mg/L NAA 4 mg/L 6-BA, the bulblet formationg rate of L. aurea was 220%;at the same time, when the medium was MS 0.2 mg/L NAA 2 mg/L 6-BA, the rate of L.

本研究选择西南部分地区及日本的几个石蒜品种，从细胞学和DNA分子角度，分析了它们的遗传多样性水平和遗传结构状况，对红花石蒜和忽地笑的离体繁殖技术进行了初步研究，得出如下结论： 1 进行了红花石蒜和黄花石蒜双鳞片快速繁殖条件的研究，结果表明：红花石蒜在16小时800-1200 lx光照下比黑暗条件下出芽率要高；黄花石蒜在MS NAA0.2mg／L 6-BA4mg／L下出芽率为220％，红花石蒜在MS NAA0.2mg／L 6-BA2mg／L下出芽率为108％；NAA比IBA有利于石蒜生根；硅藻土显著提高黄花石蒜双鳞片出芽率，活性炭起抑制作用；6％蔗糖浓度有利于红花石蒜小鳞茎增重，MS 6-BA4mg／L NAA0.5mg／L培养基有利于小鳞茎增殖，切割一刀比两刀有利于小鳞茎增殖。

The results show that NAT can effectively delaies the senescence of flag leaves and promotes both the development of roots of cutting leaves of hollyhock and the redifferentiation of young spikes of wheat culture in vitro, and also indicate that the effect of NAT is more remarkable than that of NAA.

结果表明，NAT可有效的延缓小麦旗叶的衰老，促进蜀葵叶柄的扦插生根和促进小麦幼穗离体培养的再分化作用。其效果比NAA更为明显。

The research made a serial of studies on buds inducement and reproduction, root differentiation and cultivation of young plant in different hormone and different culture media, which selected tender leaves of Pelargonium citrosum as explants in germfree condition.

以驱蚊香草的幼嫩叶片作外植体，在含不同激素的不同培养基上进行丛生芽的诱导、芽的继代增殖、芽生根与移栽研究，以快速获得再生植株。

Results showed that green firm callus and rooting were obtained with treatments of NAA 0.5-3.0mg/L, in which the NAA 0.5mg/L treatment appeared the optimal rooting result of 90%. White loose callus was obtained with treatment of 2,4-D0.1-3.0 mg/L.Callus can not be induced by adding BA solely at 0.5-3.0mg/L. There appeared bud redifferentiation only when appropriate concentration of combined BA,NAA and 2,4-D were applied.

结果表明：单独加入NAA0.5～3.0mg／L可诱导出绿色致密的愈伤组织，并再生出根，其中NAA0.5mg／L处理生根率最高，达90％；单独加入2，4-D0.1-3.0mg／L可诱导出白色疏松的愈伤组织；单独使用BA0.5—3.0mg／L不能诱导出愈伤组织；BA与NAA或2，4-D只有在适当的质量浓度范围内配合使用才能分化出芽，芽分化率最高的处理为BA3.0mg／L＋NAA0.5mg／L，分化率为30％。

What is important is not to let hate take root in your mind.

漠视它的存在，它是不重要的，重要的是别让恨在你的心中生根。

In order to raise the rate of the rootage and survival of the cutting, save labor-power, reduce labor intensity and cut down the cost,we have developed the ecological environment auto control system for cutting transplant in the green house .It is able to control the greenhouse environment for the whole process of the cutting transplant and to satisfy the necessary condition of it.

为提高扦插苗木的生根率和成活率，节省人力，减少工人的劳动强度，降低育苗成本，我们研制了扦插育苗大棚生态环境自动化调控系统，实现了整个育苗过程大棚环境的自动化调控，满足了扦插苗木对环境的要求。

Result The results indicated that the optimal medium of shoot inducement for leaf-explant was MS+6-BA 1.00 mg/L+NAA 0.50 mg/L, and the optimal concentration of Kanamycin and Cefotaxime sodium in gene-engineering was 40 and 300 mg/L, respectively. The rootage rate of the reborn bud might reach 82% in MS medium with IBA 0.10 mg/L.

结果］结果表明，三倍体毛白杨最适合的不定芽分化培养基配方为MS+6-BA 1.00 mg/L+NAA 0.50 mg/L；在基因工程中，40 mg/L的卡那霉素为选择性抗生素使用浓度，300 mg/L的头孢霉素为抑菌性抗生素使用浓度；再生的不定芽在MS+IBA 0.10 mg/L固体培养基中生根率可达82%。

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。