GUO Shu-mei,NIU Zhen-fu.Effect of Temperature and Moisture to Sporangium Germination and Formation of Cucumber Downy Mildew[J].Northern Horticulture,2012,36(13):151-153.
温湿度对黄瓜霜霉菌病斑产孢和孢子囊萌发的影响
- Title:
- Effect of Temperature and Moisture to Sporangium Germination and Formation of Cucumber Downy Mildew
- 文章编号:
- 1001-0009（2012）13-0151-03
- Keywords:
- Pseudoperonospora cubensis; temperature and moisture; sporangium germination and formation
- 分类号:
- S 436.421.1+1
- 文献标志码:
- A
- 摘要:
- 以“鲁黄瓜3号”为试材，研究了温湿度对黄瓜霜霉菌病斑产孢和孢子囊萌发的影响。结果表明：温度、湿度对黄瓜霜霉病病斑产孢和孢子囊萌发均有显著影响，其中湿度的影响效果较大。孢子囊在10~30℃都能萌发，最适温度20℃。孢子囊萌发需要自由水，即使相对湿度为100%，孢子囊也不能萌发。病斑在10~35℃均能产孢，不同温度下产孢量有明显差异，15~20℃产孢量最大。叶片结露条件下，病斑能大量产孢，其产孢量显著高于饱和湿度条件，而干燥的条件下(RH为45%)病斑不能产孢
- Abstract:
- With ‘3rd Lu cucumber’ as test materials,the effect of temperature and moisture to sporangium germination and formation of cucumber downy mildew were studied.The results showed that temperature and moisture showed significant affection on germination and formation of sporangia and the role of moisture was more important than temperature.The sporangia germinated at the temperature ranged from 10 to 30℃,with optimum at 20℃.The germination of sporangia required free water and the sporangia could not germination without free water,even though at saturated humidity.Lesions of downy mildew formed sporangia at the temperature ranged from 10 to 35℃.The quantity of sporangia formed at different temperature was significantly different and more sporangia were formed at 15~20℃.When leaves were wetted，the lesions formed plenty sporangia.The quantity of sporangia formed by wet lesions was significantly more than the leaves in saturated humidity.Lesions did not form any sporangia in dry condition (RH=45%).
参考文献/References:
[1]Cohen Y,Roten J.Field and growth chamber approach to epidemiology of Pseudoperonospora cubensis cucumbers[J].Phytopath,1971,61:736-737.
[2]石延霞,李宝聚,刘学敏.黄瓜霜霉病研究[J].东北农业大学学报,2002,33(4):391-395.
[3]虞皓,何自福,方羽生,等.温度对黄瓜霜霉病菌产孢及孢子囊萌发的影响研究[J].广东农业科学,2004(5):57-58.
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备注/Memo
第一作者简介：国淑梅（1975-），女，山东聊城人，硕士，讲师，现主要从事植物病理的教学与科研工作。E-mail：ngygsm@163.com.
收稿日期：2012-02-17