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在我們过去的观察中已經指出,中國白菜品种間对于軟腐病存在着抗病程度的顯著差异,这些差异与白菜植株的形态及叶柄的邑澤有一定的联系,例如包心白帮的比較容易受病,而疏心青帮的一般此較抗病。同时我們也观察到白菜整个生長發育期中以抱头以前的階段比較不易發病而在抱头以后則發病愈來愈多。如所周知,軟腐病細菌是一种伤口侵入的弱寄生物,如果沒有伤口或有伤口而有迅速伤愈的条件就不可能發病。这应該和馬铃薯的对Erwinia phytophthora及番藷的对Rhizopus tritici的抗病情况有相似之处。根据这种理解,我們首先测定同一白菜品种间叶基組織在不同条件下伤愈的速度及其与發病的关系,進而鑒别白菜品种之間伤愈速度的差別。
In our observations in the past, it has been pointed out that there is a significant difference in disease resistance between Chinese cabbage cultivars and soft rot, and these differences are related to the morphology of the cabbage plants and the etiolate petiole. For example, Sick, and spared Green Gang general resistance to disease. At the same time, we also observed that cabbage throughout the growth and development of the stage before the first contractor is less likely to attack the onset of the head after more and more. As we all know, soft-rot bacteria is a weak parasite invaded by wounds. It is impossible to get rid of the disease if there is no wound or there is a wound that is rapidly injured. This should be similar to potato’s resistance to Erwinia phytophthora and sweet potato to Rhizopus tritici. According to this understanding, we first determine the same cabbage varieties of leaf-based tissue injury rate under different conditions and its relationship with the incidence, and then identify the differences between the rate of recovery of Chinese cabbage varieties.