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[1] 种子带毒部位的测定,证实种子的胚部和子叶都带有病毒,种皮内基本上测不到病毒的存在。大豆花叶病毒是典型的种胚带毒类型。 [2] 在种子形成过程中,种子内的带毒率很高。种子成熟豆荚干枯后,种子的带毒率急剧下降。不同品种的种子带毒率下降幅度不同,造成品种间种子带毒率和传毒率的差别。种子在干燥贮藏过程中使种皮内的病毒钝化。贮藏时期中,种胚内的带毒率没有明显变化。 [3] 病株上有褐斑和无褐斑种子的带毒情况,虽然结果都是褐斑种子的带毒率和传毒率较高,但是褐斑粒也有不带毒和不传毒的。而无褐斑粒仍然有相当高的带毒率和传毒率。褐斑粒出现的多少还与不同品种和发病时期的环境因素都有关系。因此,褐斑不能作为种子带毒与否的唯一指标。 [4] 测定病株上的无绒毛豆荚种子的带毒率都略高于正常豆荚的种子,但是这种差别不明显。 [5] 枯斑寄主(菜豆Top-Crop)检测种子带毒率的方法与直接播种检查种子传毒率所得到的结果趋势一致。
[1] The determination of the virulent sites of seeds confirmed that the embryos and cotyledons of the seeds all contained the virus, and the presence of the virus was virtually undetectable in the seed coat. Soybean mosaic virus is a typical type of embryo poisoning. [2] In the seed formation process, the seed in the high rate of poisoning. After the mature seeds of pods dried up, the virulence of the seeds dropped sharply. Different varieties of seed with different rates of decline in the rate of poisoning, resulting in species differences between the rate of seed poisoning and the rate of transmission. Seeds passivate viruses within the seed coat during dry storage. During the storage period, there was no significant change in the virulence rate in the embryo. [3] There are brown spots on the diseased plants and brown spots without seed poisoning, although the results are the brown spotted seed carrying rate and high transmission rate, but the brown spot is also non-toxic and non-toxic . Without brown speckles still have a very high rate of virulence and virus transmission. The number of brown spot appears with the different varieties and the environmental factors of the incidence period are related. Therefore, brown spots can not be used as the only indicator of seed poisoning or not. [4] Measured diseased plants on the velvet pod seed poisoning rates are slightly higher than the normal pod seed, but this difference is not obvious. [5] The method of detecting the virulence of seed by the dead-leaf host (Top-Crop) has the same trend as that of direct sowing of seeds.