诱变

When EMS was applied, it was found that 2.0% EMS resulted the highest microkernel rate (15.6‰). Treating the materials with 2.0% EMS for 4 hours could lead to semi-lethal. Cytological observations found that chromosome aberration phenomena such as single microkernel, double microkernel, three microkernel, chromosome bridge, resort chromosome and syncytium were presented in the mutants.

EMS诱变途径中，浓度为2.0 %处理时间为4 h的组合获得最高的微核率（15.6‰），EMS浓度为2.0 %处理时间为4 h的组合使材料达到半致死；细胞学的观察看到了单微核、双微核、三微核、染色体桥、滞留染色体和合胞体等染色体畸变现象，再生苗中发现了1棵变异株。60Co辐射的诱变途径中，20Gy的剂量使不定芽半致死，再生苗中发现了1棵变异株。

Gallica were exposed under ultra-violet ray and the mutants were screened in RBBR-containing PDA plates, and then the laccase activities of the mutated strains were determined by ABTS.

以粗毛栓菌T.gallica为出发菌株，通过紫外诱变处理其担孢子、PDA-RB亮蓝平板变色法初筛、ABTS法测定培养液漆酶活力复筛，获得1株漆酶高产诱变菌株SAH-12。

In order to obtain highly efficient H_2-producing aciduric anaerobic strain, a hydrogen producing strain H-8 was irradiated by microwave, the microwave mutagenesis parameters were optimized, and the genetic stability, hydrogen-producing potential and acid resistance of the mutant were investigated.

为获得厌氧产氢菌的高效突变株，以产氢菌H-8为原始菌株进行微波诱变处理，对微波诱变参数进行了优化，考察了突变株的遗传稳定性、产氢特性及耐酸性。

The spores of hyperparasitic Streptomyces strains PR and F46 were irradiated with UV light to improve the control effects against plant diseases.

本研究以重寄生链霉菌PR 和F46 为出发菌株，以靶标病原菌为指示菌，以紫外线为诱变因子，对它们进行了诱变改良研究。

The mutagenic rate of plant height and grain weight was higher than the others.

性状间的诱变率具有差异，株高和粒重的诱变率明显高于其它性状

This paper reviews the mechanism of mutation breeding in space, mutagenic characteristics, its effect on plants, and carries out analysis and prospect on the existing problems.

综述了航天育种的诱变机理、诱变特点及对植株的影响，并着重对存在的问题进行了分析和展望。

At the same time, the mutative effects of all mutative factors in the experiment were evaluated and compared with each other, too.

同时，本文还对所使用的不同诱变剂的诱变效应进行了评估和比较。

Six bacteria and five mildews have been separated from 119 strains, wliich grew well on the culture media contained lignin. The result of taxonomic identification is that XI, X2 and X3 belong to Pseudomonas, X4 and X5 belong to Xanihomonas, X6 belongs to Mycoplana. A preliminary study has been carried out on the capacity of lignin degradation of the 6strains of bacteria, and strains X2 and X4 were chose to carry out the experiments. The most favorable temperature for the 2 strains is 30癈, and the pH is 7; After being treated by ultraviolet rays, activity of all the three kinds of lignin-degrading enzyme produced by the strains can be increased greatly, the bacteria increasing rate is remarkably improved.

从119个菌株中分离筛选出了6株细菌和5株霉菌，它们可以在含有木质素的培养基上良好生长：细菌分类学鉴定结果为X1、X2和X3：假单胞菌属，X4和X5：黄单胞杆菌属，X6：枝动杆菌属；对6株细菌降解木质素性能进行了初步的研究，选定X2和X4为实验用菌种，两株菌适宜的生长温度为30℃，最适初始pH值为7；经紫外线照射诱变法处理，可使它们产生的三种木素分解酶活性均有明显的提高，细菌增长速率比诱变前明显提高。

Finally, the saccharomycetes which had muted in the outward shape and ability of the ethyling alcohol had enhanced the heavy ion mutagenesis was a method for selective breeding fine mold mushroom spawn in the experiment.

实验证明，经过诱变后的菌种在外观形态和耐酒精性能以及产酒精能力上有提高，重离子诱变作为选育菌种的方法具有很好的效果。

The thalami were more sensitive to the treatment time than the concentration when EMS was used as a mutagen and 4 h was the proper treatment time under 0.4% EMS.

诱变苗在进行高温筛选时，存活率出现变化、叶色叶型发生变异，表明诱变与筛选是有效的。

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。