HOST RELATIONS AND DISTRIBUTION OF A PHYSIOLOGICAL AND PATHOLOGICAL VARIANT OF PSEUDOMONAS-MORSPRUNORUM
HOST RELATIONS AND DISTRIBUTION OF A PHYSIOLOGICAL AND PATHOLOGICAL VARIANT OF PSEUDOMONAS-MORSPRUNORUM
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DOI：
10.1111/j.1744-7348.1975.tb01647.x
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发表时间：
1975-01-01
影响因子：
2.6
通讯作者：
CROSSE, JE
中科院分区：
文献类型：
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作者：
FREIGOUN, SO;CROSSE, JE
在甜樱桃树(Primus Avium)的一块地里，由假单胞菌引起的叶斑病在cv.比通常更敏感的简历上的更圆。拿破仑。Rundel还支持显著增加病原菌的叶表面种群。这两个品种的相对田间敏感度的逆转与树上存在变异形式的OFP有关。在菌落结构、明胶酶活力和病理特征等方面与典型菌株不同。变异菌株对叶痕的侵染能力比典型菌株低，但对树皮实质的侵染能力强于典型菌株，并且在枝条和叶片接种上表现出对cv的专化性。圆圆的。这种专化性反映在其他地方的圆形树和拿破仑树上的变异和典型菌株的分布上。讨论了该变异在疾病流行病学和品种抗性方面的意义。该变异株被命名为小种2，以区别于典型的或小种1的樱桃品系OFP。桑树属。
In a plot of sweet‐cherry trees(Primus avium),leaf spot infections caused byPseudomonas morsprunorumwere more abundant on the cv. Roundel than on the normally more susceptible cv. Napoleon. Roundel also supported significantly higher leaf surface populations of the pathogen. This reversal in the relative field susceptibility of the two cultivars was associated with the presence on the trees of a variant form ofP. morsprunorumthat differed from typical strains in colony structure, gelatinase activity and pathological characters. The variant strains were less infective through leaf scars but more invasive in bark parenchyma than typical strains, and in branch and leaf inoculations, they showed specialization for the cv. Roundel. This specialization was reflected in the distribution of variant and typical strains on Roundel and Napoleon trees in other localities. The significance of the variant in relation to disease epidemiology and cultivar resistance is discussed. The variant is designated race 2 to distinguish it from the typical, or race 1 cherry strains ofP. morsprunorum.