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大豆锈病(Phakopsora pachyrhizi Syd.)主要以其夏孢子进行传播和侵染。应用大豆离体叶片培养技术,在24±1℃、相对湿度饱和的人工控制条件下,研究光照强度和黑暗时长对大豆锈病菌夏孢子侵染的影响。结果表明,黑暗培养8~16 h,光强在600~400 lx适宜大豆锈病菌夏孢子的侵染,延长或缩短黑暗培养时长,大豆锈病菌的侵染逐渐减少,增加或降低光强度,大豆锈病菌夏孢子的侵染率也逐渐降低,高光强(>3000 lx)和低光强(<200 lx)均不利于大豆锈病菌夏孢子的侵染,从高光强或低光强转至适宜光强度下均有利于大豆锈病菌夏孢子的侵染;试验结果与田间大豆锈病自然发生规律相似。
Soybean rust (Phakopsora pachyrhizi Syd.) Is mainly spread and infected with its summer spores. The effects of light intensity and darkness on the infection of summer spores of soybean rust were studied under the artificial control conditions of 24 ± 1 ℃ and relative humidity saturation by using the cultivation technology of soybean leaf in vitro. The results showed that the darkness was 8-16 h, the light intensity was 600-400 lx suitable for the infection of S. sphaeroides, prolonging or shortening the duration of darkness, reducing the infection of soybean rust, increasing or decreasing the light intensity, The infection rate of rust spores was also gradually reduced. High light intensity (> 3000 lx) and low light intensity (<200 lx) were not conducive to the infection of the summer spores of soybean rust, from high light or low light intensity to suitable light intensity Are conducive to the rust of soybean rust infection of summer spores; the test results and the natural law of soybean rust similar.