摘要
本试验通过对苎麻花叶病进行多年系统研究，其结果如下：此病头麻、二麻发生重，三麻轻；气温１５～２６℃症状明显，２８℃上开始隐症；现有品种资源中２０％以上的品种表现高抗（病指０～５）；此病主要由无性繁殖材料（包括嫁接）传播；从电镜观察病毒、细胞内含体检测、病毒外壳蛋白体组分测定和病毒提纯液紫外光吸收光谱分析诸方面初步证实苎麻花叶病病原为线状病毒，大小约（１３２６～１４１１）ｎｍＸ（１３．０４～１３．１８）ｎｍ，并排除了类病毒、寄生真菌和细菌病原；病、健叶的同工酶亦有差异；选育推广抗病品种和增施钾肥是目前防治此病的有效措施。
Ramie(Boehmeria nivea) mosaic was studied systematically from 1987 through 1991,and the results were as follows:(1) The incidence of the disease was greater in the first andsecond harvests than in the third harvest.Temperature of 15 to 26℃was favorable to thespread of the disease,but the disease symptoms disappeared when temperature rose to 28℃or more. (2 ) Of the more than 200 varieties investigated,more than 20%showed highlystrong resistance to the disease (DI=0～5).(3) The disease was spread by vegetative pro-pogation materials.(4)Citrus exocortis viroid and potato spindle tuber viroid , parasiticalbacteria and fungi were eliminated as possible pathogens of ramie mosaic. (5) A kind of lin-ear virus, size(l 326～1411)×(13.04～13.18)nm,found under electronic microscope inthe extract of diseased leaves,was very possibly the pathogen of the disease. Components ofthe virus protein and the ultra violet absorbance spectrum of the virus extract were also test-ed,and cell inclusion bodies were found with super-thin sectioning of diseased leaves. (6)Disease-resistant varieties and additions of potash fertilizer were effective measures for de-creasing losses caused by the disease.
出处
《江西农业大学学报》
CAS
CSCD
1994年第4期355-361,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
湖南省科委资助
关键词
苎麻
花叶病
品种
抗病性
ramie
mosaic
linear virus
avenue of infection,variety resistance of ramie
