摘要
国槐(Sophora japonica L.)是北京重要的绿化树种之一。近年来道路两旁新栽国槐愈来愈多,但部分地区的国槐小树,发现类似香椿、油桐带化病的症状,通过对北京西苑地区国槐行道树的观察与调查,发病率约为6.6％～11.3％。其它地区也有零星发生。 国槐带化病与香椿、油桐带化病病变十分相似,感病的国槐小树,嫩枝尖端呈扁平的带状,宽约2～5cm,长约15～20cm不等,有的卷曲向内再向上生长,形成一个大疙瘩;有的扭曲呈钩状生长,酷似一把砍柴刀(图版Ⅰ-A,B)。病枝上伴有簇生枝及小叶,入冬则脱落,第二年春天,在病枝上又萌发出新的簇生枝及小叶,此病状既影响树木生长,又影响绿化美化。
An observation on the fascited disease of Sophora japonica L. was conducted in Beijing, China. Branch apex fasciation and intensive proliferation of leaf are the symptoms of the disease. Pleomorphical mycoplasma-like organisms were detected by electron microscopy in the sieve elements of the phloem as well as in some parenchyma cells of the fasciated plants, but they did not appear in normal plants.
出处
《林业科学研究》
CSCD
北大核心
1992年第1期109-110,T001,共3页
Forest Research
关键词
国槐
带化病
类菌原体
Sophora japonica
fasciated disease
mycoplasma-like organisms
