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首页> 外文期刊>Acta Horticulturae >Dodder transmission of two different MLOs from plum trees affected by 'leptonecrosis'
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Dodder transmission of two different MLOs from plum trees affected by 'leptonecrosis'

机译：受“肾坏死”影响的李树中两种不同的MLO的丝传播

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摘要

A graft transmissible disease known as plum leptonecrosis is described. It has been found in Italy since 1933 on Japanese plum (Prunus salicina) and apricot. A phytoplasma is thought to be the causal agent. In Udine, an effort was made to isolate the plum leptonecrosis agent (PLNa) from plum and peach to Catharanthus roseus. A clone of Cuscuta campestris was used as a vector. Six different types of inoculum sources were used, including young shoots of Myrobalan (Prunus cerasifera), 2-year-old plants of Ozark Premier, micropropagated Shiro plants, potted seedlings of peach GF 305 infected by chip-budding from plum, cut Ozark Premier shoots, field infected plum trees. Of 176 C. roseus plants inoculated, 9 became infected; 4 reacted with typical small pale flowers and 5 with virescence. In sub-inoculated C. roseus, the symptom types remained invariable. Both sources of inoculum and test plants were observed under EM and light fluorescence microscope. The results indicated that plum can host different phytoplasmas, at least 2 in the investigated area. The aetiological involvement of the 2 different phytoplasmas is discussed as well as the possible occurrence of mixed infections. Analysis with PCR of naturally and artifically infected plants are in progress.
机译：描述了一种称为李子瘦坏死的嫁接传染病。自1933年以来，它已在意大利的日本李子（Prunus salicina）和杏子上发现。植物质浆被认为是病因。在乌迪内，人们努力从李子和桃子到Catharanthus roseus中分离出李子瘦素致死剂（PLNa）。樟树（Cuscuta campestris）的克隆用作载体。使用了六种不同的接种源，包括Myrobalan（Prunus cerasifera）的幼芽，Ozark Premier的2岁植物，微繁殖的Shiro植物，被李子切屑感染的桃GF 305盆栽苗，切成的Ozark Premier芽，田间感染李子树。在接种的176朵玫瑰蔷薇植物中，有9株被感染。 4与典型的淡色小花反应，5与绿色反应。在亚接种玫瑰色念珠菌中，症状类型保持不变。在EM和光荧光显微镜下观察接种物和试验植物的两种来源。结果表明，李子可以容纳不同的植物原质，在研究区域至少有2个。讨论了两种不同植物质原体的病因，以及混合感染的可能发生。天然和人工感染植物的PCR分析正在进行中。

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