诱变

Crops of Brassica napus L., Linum usitatissmum L., Allium fistulosum L. and Lens culinaris Medic. were irradiated by 80 MeV/u 12C(superscript 6+) ion beams with doses of 30, 90 and 180 Gy. The germination rates and heights of seedlings of M1 and M2 generation of these four plants were studied.

以能量为80MeV/u的12C(上标 6+)离子为诱变源辐照油菜、胡麻、大葱和兵豆的干种子后，研究了不同剂量处理对4种农作物M1和M2代种子出苗率及幼苗生长的影响。

It is possible that the genome instability induced by low-energy ion is a major part of its mutagenic mechanism.

以上结果从另一个侧面解释了低能离子的诱变机制。

It was thought that space induction caused the variation of size, fertility and the abnormal meiosis.

分析认为花粉的大小差异和花粉的育性与减数分裂异常有关，而这些现象都是航天诱变造成的

The tetraploid plants and the diploid plants were also compared morphologically and cytologically.

对诱变的四倍体和二倍体进行了形态学、细胞学的比较。

Space breeding is a novel effective approach to crop mutational improvement, which has considerable economic and social benefit.

太空育种是农作物诱变遗传改良的一种有效新途径，它具有非常可观的社会经济效益。

The results were as follows: The mutation rate could be increased effectively by the three treatments; the cooperation effect was better when TMV was treated by nitrous acid and heating.

采用高温、亚硝酸及两者的复合处理对烟草花叶病毒强毒株进行诱变，均可有效提高突变频率，而且复合处理还有较好的协同效应。

After treated by UV, two mutant strains with high yield of bilirubin oxidase are obtained.

通过紫外诱变选育到两株产酶能力稍高的菌株，其产酶能力是原先的1.5～2倍。

Faba root tip was studied through detection of micronucleus technique Both of nitrate (0.08 mol/L) and nitrite (0.80 mmol/L) with low concn of could significantly induce the formation of micronucleus of V. faba root tip (P.01), and showed an obvious dose effect, i.e. the permillage of micronucleus was in linear increase with rising up of mutagen concn within a certain range.

结果］低浓度的硝酸盐(0.08mol/L)、亚硝酸盐(0.80mmol/L)均能显著诱发蚕豆根尖微核的形成(P.01)，并呈现出明显的剂量效应，即微核千分率在一定范围内随诱变剂浓度的增加而线性增加。

The concentration of 6 mmol/L NaN3 treatment for 2 days was a suitable dosage for Phalaenopsis mutation induction in this test system.

根据以上结果认为，本体系合适的NaN3诱变剂量为6 mmol/L，处理2 d。

M18; phenazine carboxylic acid; mutation ; fermentation conditions

荧光假单胞菌M18；吩嗪1羧酸；诱变；发酵条件

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。