诱变的

For investigation of genetic mechanisms of leaf polarity formation, we screened for Arabidopsis mutants with aber...

通过EMS化学诱变，寻找到一些形态相似，叶发育异常的突变体，遗传实验证明这些突变体可以被分成两类。

The conclusions based on the above research and analysis were: space mutation brought not only variation of agronomist characteristics of rice, but also variation of resistance to blasts, and the variation was able to become genetic stable.

上述研究结果表明：空间诱变不但能够使水稻农艺性状产生变异，而且能够使抗性产生变异，同时这种变异能够稳定的遗传下来。

For sodium azide and dexon,the minimum measurable mutagenesis dose were 0050 and 0080μg/bottle,respectively.

用本方法测得NaN3和敌克松的最低诱变剂量分别为0.050μg／瓶和0.080μg／瓶，灵敏度显著高于Ames试验。

A mutagenic chemical that causes deamination and conversion of several bases into abnormal bases.

能引起脱氨基和将几种碱基转变成异常碱基的诱变性化学物质。

Objective To observe the effect of menadiol sodium diphosphate induced mutation.

目的 观察甲萘氢醌二磷酸酯钠的诱变作用。

The gene eui is one of the most important genes deployed in hybrid rice breeding, since it has been used to improve panicle exsertion of rice male-sterile lines.

水稻eui2突变体是通过诱变方法获得的，其表型特征是在抽穗期穗颈节间剧烈伸长，其伸长部位仅限于穗颈节间，而eui1突变体除了穗颈节间伸长外，其它各个节间也都显著伸长。

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。

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。

The seeds of different varieties of mat rush were treated by 60Co γ-rays irradiation of 500, 1000, 1500 and 2000Gy. The seedlings cultured from treated seeds were used to detect the root activity, seedling growth, chlorophyll content, activities of polyphenol oxidase and catalase, and to investigate the effect of irradiation treatment on the physiological and biochemical properties of mat rush.

分别以500、1000、1500和2000Gy的60Coγ射线处理不同蔺草品种成熟干种子，并将其培养成实生苗，进行根系活力、叶绿素含量及多酚氧化酶和过氧化氢酶活性的检测，观察蔺草苗期的生长状况，从而研究不同辐照剂量对蔺草苗期生长及生理生化特性的影响，确定蔺草的适宜辐照诱变剂量，为下一步开展蔺草品种诱变改良奠定基础。

A transposon mutagenesis system applicable for Xanthomonas campestrispv.campestrishas been developed by transferring the transposonTn5gusA5,which contains the gus reporter gene,to the broad host rangvector pLAFR1 and taking the advantage of incompatibility between pLAFR1and pPH1JI plasmids.Five different types of exopolysaccharidedeficient mutants related respectively to eight different mutated sites wereisolated by applying the system to mutagenize the Xcc wild type strain.

本研究将含gus报告基因的转座子Tn5gusA5转座到广谱宿主载体质粒pLAFR1后，利用pLAFR1与pPH1JI质粒的不相容性，建立了一套适合于甘蓝黑腐病菌的转座子诱变体系，应用该体系诱变甘蓝黑腐病菌野生型菌株，成功地分离到5种不同类型、分别涉及8个不同突变位点的胞外多糖突变体。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。