锈菌

Analyzing the DNA Polymorphism: 14 random primers were selected to analyze the DNA polymorphism of 13 species of Melampsora larici-populina, the result indicates: The isolates of MLP have resemblance and difference, thee differences reflect the DNA Polymorphism of them.But the Polymorphism is not related to their origin.the result is consistent with departed one.

2DNA多态性分析：用所选出的14条随机引物对13种落叶松-杨栅锈菌进行RAPD分析，发现落叶松—杨栅锈菌菌种之间既有一定相似性，又具有明显的遗传多态性且多态性与地理来源没有必然的相关性，这与以往的结论相一致。

As Longnan region of Gansu province is one of the largest and most important over-summering areas of Puccinia striiformis f.sp.tritici in China,the objective of this study is to determine the genetic structure of P.striiformis f.sp.tritici populations in this region.

甘肃陇南地区是小麦条锈菌最主要和最大的越夏区，本研究的目的是分析该地区的小麦条锈菌自然群体的遗传结构，探索其分子遗传变异规律。

To clone the chitin synthase gene PstChsII from Puccinia striiformis and to analyze its expression pattern.

克隆小麦条锈菌几丁质合成酶基因PstChsII，分析其在小麦条锈菌不同发育时期的表达水平。

We cloned a cell division cycle PsCdc2 from Puccinia striiformis f.sp. tritici and analyze its expression profile.

克隆小麦条锈菌细胞分裂基因PsCdc2，分析该基因在条锈菌接种小麦后不同时间点的表达特征。

Diverse differential hosts and the corresponding nomenclature of Puccinia triticina races have been used by different countries in the world because of the diversity of geographic and ecological characteristics,pathogen population structures,and research history.

由于地理生态条件、叶锈菌群体结构、研究历史和研究方法等的差异，不同国家和地区采用相应的小麦叶锈菌鉴别寄主和小种命名方法。

Puccinia striiformis f. Sp. Tritici is one of the most economically important fungal pathogen of wheat worldwide. However, very little is known about its genome and gene functions, which can be critical for developing the disease management strategies.

小麦条锈菌(Puccinia striiformis f.sp.tritici)是全世界范围内小麦生产上的重要病原真菌，但是对小麦条锈菌的基因组和基因功能却了解甚少。

All of these had shown that the induced resistance could be transmitted.Oligosaccharides had not shown any direct activity against Puccinia striifomis in vitro. This suggests that Oligosaccharides can elicit resistance to diseases of wheat, and are different from common pesticides.

不同浓度(25ppm、50ppm、100ppm)的5号提取物的体外抑菌试验表明，低聚糖对条锈菌没有明显的抑制作用，说明低聚糖不具有直接杀菌或抑菌作用，使小麦产生抗锈性的原因在于诱发寄主植物的抗病潜能，使植物本身产生对病原菌的抗性，这与普通杀菌剂显然不同。

The impacts of urediniospore activity, concentration of hydrochloric acid and physiological races of rust fungi on protoplast shrinking were also studied.

研究还发现叶锈菌和秆锈菌夏孢子活力、盐酸浓度等对夏孢子原生质体浓缩状况有很大影响，且与病菌生理小种有一定的关系。

The maximum induction occurred at 12 h, at which transcripts were 0.34 fold of that in urediniospore. The minimum accumulation occurred at 96 h, whose transcript was only 0.02 fold of that in urediniospore.

PsCdc2可能通过调控条锈菌的细胞周期循环参与了侵染前期初生菌丝生长和吸器母细胞的形成，与条锈菌的致病性相关。

It will prove difficult to distinguish between losses from the excessive rains and drought, but they are significant, he said.In addition, Yorinori said that certain fungicides being used to combat the fungus have proved inefficient at killing all the spores during heavy rust attacks, leading to damage even in well-sprayed areas.

将大雨和干旱造成的损失区分出来将会有一定难度，但这种损失是很明显的，他说，另外，约里诺里还说，实践证明，有些用于对付锈菌的杀菌剂在锈菌大规模暴发时不能有效地杀灭所有的孢子，因此，有些地区即使喷洒了足量的杀菌剂也会遭到损失。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。