茎化

The result showed that the biomass, plant height, dry weigh, carnification, K(superscript +) content and K(superscript +)/Na(superscript +) ratios of I. lactea var. chinensis decreased with increasing NaCl stress, while root/shoot ratios and Na(superscript +) content increased. The water content and carnification degree of roots in all treatments were higher than shoots, which, however, was not significantly related to salt concentration.

试验结果表明：在NaCl胁迫下，随著胁迫浓度的增加，马蔺生物量、株高、干重、肉质化以及K含量、K/Na比值降低，同时根冠比、Na含量增加：各盐处理区根系含水量和肉质化程度大於茎叶，但与盐浓度的相关性不大。

Salt solution approximate 10^(-1M treatments were more effective in the inhibition of elongation. Fiber formation and lignification were also inhibited to various degrees by salt solutions.

以10^(-1)M左右的硝酸镁、硝酸钙、硝酸钠溶液处理，嫩茎的抽长被抑制得更多；纎维化和木质化也受到明显的抑制。

It was prepared from \%o\% nitroaniline and \%m\% aminophenol by diazotisation, coupling reaction and reduction, yield was 89%.

以邻硝基苯胺和间氨基酚为原料，经重氮化、偶合、还原制备了 2 (2 羟茎 4 氨基苯基)氢化苯并三唑，产率为 89%。

Noticeable changes of DNA methylation level, both in stem apices and leaves, happened before, during and after floral bud differentiation.

7茎尖组织和茎尖幼叶的DNA甲基化水平在花芽分化前后发生了明显的变化。

The DNA methylation level in stem apices treated with 5-azaC was comparable to that of seedlings treated at 5℃ for 10 days.

本文研究了去甲基化因子5-氮杂胞苷(5-azaC)对萝卜开花及幼苗茎尖DNA甲基化水平的影响。

Vitrification, chlorosis, scale-shaped differentiation and failure to root of regenerated shoots frequently occur in industrialized production of tetraploid watermelon Citrullus vulgaris L.

西瓜四倍体工厂化生产中存在试管苗玻璃化、黄化死亡、鳞片状分化、不生根等不利问题，在MS中NH4NO3 含量减半的情况下，前两者可得到有效的控制；用连续增殖、连续壮苗的方法，解决了西瓜四倍体鳞片状分化的难题；用茎尖扩繁的最佳培养基为MS(含半量NH4NO3 )+2 。

Aqueous extract of cotton has allelopathic effect on Raphanus sativus, Brassica campestris, Lactuca indica, Brassica campestris, Echinochloa crusgall, Setaria viridis and Abutilon theophrasti and its inhibition effect gradually strengthens with increasing concentration. Aqueous extracts from stems, leaves and roots of cotton inhibit or accelerate seed germination and seedling growth, and activity of enzyme of seedling root of cotton. While aqueous extracts from stems and leaves of cotton are 0.02 gmL^(-1), root length, shoot length, lateral root number and dry weight of cotton respectively increase by 10.3%, 3.1%, 22.9% and 2.4% over the control. The above mentioned indexes are lower than the control by 34.4%, 39.2%, 40.6% and 19.0% respectively as the aqueous extracts are 0.1 gmL^(-1). At the same time, root activity and SOD activity decrease by 38.2% and 36.7%, while POD activity and MDA content increase by 52.3% and 36.5%. Growth indexes of plant receptors increase at low concentrations but decrease at high concentrations of aqueous extracts. The allelopathic effect of aqueous extract of stems and leaves is stronger than that of root.

结果表明：棉花植株水浸提液对萝卜、白菜、莴苣、油菜、稗草、狗尾草、苘麻均具有化感效应，随着作用浓度增加，抑制效应逐渐加强；棉花茎叶和根系水浸提液对棉花种子萌发、幼苗生长、幼苗根系活力、根系酶活性有抑制或促进作用，当茎叶浸提液浓度为0.02 gmL^(-1)时，棉花根长、苗高、侧根数、干重分别比对照增加10.3%、3.1%、22.9%和2.4%，当浓度为0.1 gmL^(-1)时，上述指标与对照相比分别降低34.4%、39.2%、40.6%和19.0%，而根系活力、SOD活性比对照降低38.2%、36.7%，POD活性、MDA含量较对照增加52.3%和36.5%，不同浓度棉花植株水浸提液对棉花生长呈现&低促高抑&的规律，且茎叶浸提液作用效应大于根系浸提液。

Result Galium aparina water extract had some effects on the germination rate, roots length, stem length and fresh weight. The water extract decreased the germination rate and roots length of the 3 vegetables, but its effects on the stem length and fresh weigh was variable in different species.

结果］猪殃殃水提液对3种蔬菜的发芽率、根长、茎长、鲜重都有一定的影响；对发芽率、根长均表现为抑制作用，对茎长和鲜重的化感作用则因物种不同而不同。

In the previous ofspicy camphor rhizospheric soil water extraction of vegetable seed germination of allelopathy effect is designed on the basis of plant water ofspicy camphor, leaching solution of experiment, the experimental design confirmed ofspicy camphor plant roots, stems and leaves of radish extraction of seed germination of all have certain effect.

在前人的香樟根际土壤水浸提液对蔬菜种子发芽具有化感作用效应的基础上，设计出香樟植株水浸提液的化感试验，该实验设计证实了香樟植株的根、茎、叶水浸提液对萝卜种子的发芽都具有一定的化感作用效应。

The transformation efficiency of potato via Agrobaterium tumefaciens system was studied,and the result showed that stem cutting is better than leaf for its high callus induction efficiency ,strong ability to differentiation and regeneration and easy to obtain.

并对遗传转化体系进行了优化：采用加入AgNO3有效的防止了外植体在培养过程中的褐化问题；对于转化过程中预培养的时间、共培养时间、农杆菌浸染时间和浸染浓度进行了试验，茎段的预培养2天、叶盘预培养3天，共培养时间茎段为3天、叶盘以2天为宜。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。