urediospore

Electron Microscopy of Urediospore Formation in Wheat Stripe Rust

小麦条锈菌夏孢子形成的电镜观察

The Fusion of Urediospore Germ Tubes in Puccinia striiformis West , on Wheat Leaves

小麦条锈菌夏孢子芽管在小麦叶片上结合现象的研究

Three pH value of phosphate buffer , four concentrations of EMS solution , and six treatments at different time were used to optimize mutagenic condition of wheat stripe rust urediospore .

采用3个pH值缓冲液，4个浓度甲基磺酸乙酯（EMS）溶液及6个时间处理，对小麦条锈菌夏孢子的诱变条件进行优化。

The cells are spherical or ovoid , in which two nuclear was situated closely to each other ; there are plenty of cone-shaped spikes on the wall of urediospore .

细胞呈球形或卵球形，双核相近排列；在夏孢子壁上存在有大量圆椎状的突刺。

And after about 29 to 35 days of growth , urediospore formed around the small black blister , namely of the teliospore , broken germs spread out rusty teliospore .

又经过约29&35天生长发育，夏孢子堆周围形成大量黑色小疱，即病菌的冬孢子，破碎散出铁锈色冬孢子。

The results showed that the urediospore germinated 6 h after inoculation on poplar leaf , and then germ tube grew into stoma and haustorium was formed in the host cell 24 h after inoculation .

相互作用的组织病理学进行了系统的观察。夏孢子接种6h后开始萌发，12h后芽管侵入气孔，此后在寄主细胞内形成吸器。

PH 7 . The urediospore start to spread in early of May . The Peak Period is on May 22 . The optimum temprature of urediospore germination is 25 ℃ . The spore germinate best on the 2 % agar water membrane adding juice of Siphonostegia chinensis .

夏孢子5月初开始飞散，5月22日进入盛期，最适温度25℃，在加入阴行草汁液的2%琼脂膜上萌发最好；

The reasonable time of ultraviolet radiation treatment to urediospores of Chinese wheat yellow rust race 29 ( CY29-3 ) is the time of 90 % relative percentage of lethality of urediospores . The 88.97 % relative percentage of lethality of urediospore was gotten after 8 minutes ultraviolet radiation treatment .

以夏孢子相对致死率90%左右作为紫外线处理最适时间，发现8min为小麦条锈菌条中29号单孢菌系（CY29-3）最适处理时间，其夏孢子相对致死率达88.97%。