GAO Yuhong,YAN Shenghui,DENG Lili.Effect of Watermelon Seeds Pathogen on Occurrence and Infection Pathway of Bacterial Fruit Blotch Disease[J].Northern Horticulture,2016,40(05):141-144.[doi:10.11937/bfyy.201605037]
西瓜种子带菌对幼苗细菌性果斑病发生和侵染途径的影响
- Title:
- Effect of Watermelon Seeds Pathogen on Occurrence and Infection Pathway of Bacterial Fruit Blotch Disease
- Keywords:
- watermelon; seed; bacterial fruit blotch disease; seed-borne disease; epidemic factors; infection pathway
- 文献标志码:
- A
- 摘要:
- 以西瓜品种“绿之秀”的种子为试材，采用人工接种的方法，研究了细菌性果斑病（bacterial fruit blotch，BFB)病原菌燕麦嗜酸菌西瓜亚种（Acidovorax avenae ssp.citrulli，Aac)的流行因素、种传方式及其在西瓜幼苗的定植情况，并调查了西瓜病果种子不同部位带菌情况。结果表明：发生BFB的西瓜病果采得的种子不完全带菌，种壳和种仁均可带菌，而且种壳带菌率明显高于种仁带菌率；接种菌液量和空气相对湿度是影响BFB发生的重要因素；Aac在西瓜幼苗生长过程中先侵染幼苗子叶，随后沿叶脉侵入下胚轴，侵染过程中有一定的潜伏期，最终引起幼苗下胚轴发病，但不侵染西瓜幼苗的根部。
- Abstract:
- Taking the seeds of ‘Lyu Zhi Xiu’ as materials，using artificial inoculation method，the epidemic factors，seed transmission pattern，colonization in watermelon seedlings of Aac (Acidovorax avenae ssp.citruli) from BFB (bacterial fruit blotch) were researched and the infection in different parts of seeds was investigated.The results showed that not all of the seeds from diseased watermelon had Aac，and both seed shell and seed embryo carried Aac，Aac-carrying rate of the shell was obviously higher than that of embryo.Both inoculated-pathogen quantities and relative air humidity were the important factors effecting occurrence of bacterial fruit blotch disease.and the Aac infected the cotyledons firstly，then infected the hypocotyls，in the process of which there was the latency of Aac，in the end caused the disease of the hypocotyls，but the Aac didn’t infect the root of watermelon seedlings. Keywords:watermelon;seed;bacterial fruit blotch disease；seed-borne disease；epidemic factors；infection pathway
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备注/Memo
第一作者简介：高玉红（1979-），女，河南尉氏人，硕士，副教授，现主要从事植物病虫草害的教学与研究等工作。E-mail:Gaoyuhong2008@163.com.基金项目：河南省财政专项资助项目（20137911）。