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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (11): 303-307.

所属专题： 园艺

• 植物保护 农药 • 上一篇    下一篇

氮素浓度对大白菜小黑点病发生的影响

刘东1,杨晓云2,王媛2,司朝光2,张淑霞2,张清霞2   

  • 收稿日期:2009-12-31 修回日期:2010-01-21 出版日期:2010-06-05 发布日期:2010-06-05
  • 基金资助:

    十一五科技支撑计划

Effects of Various Nitrogen Levels on Petiole Spot in Chinese Cabbage

Liu Dong1, Yang Xiaoyun2, Wang Yuan2, Si Chaoguang2, Zhang Shuxia2, Zhang Qingxi   

  • Received:2009-12-31 Revised:2010-01-21 Online:2010-06-05 Published:2010-06-05

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摘要：

摘要：研究了大白菜抗小黑点病品系C24、P8-1和感小黑点病品系03B9、P8-2，在氮素浓度为5(N5)、15(N15)、25(N25) mmol/L的水培条件下，对叶柄铵态氮、电导率、丙二醛含量和多酚氧化酶活性的影响及其与小黑点病发生的关系。结果表明，随氮浓度的增大，小黑点病发病加重。抗病品系随时间延长，铵态氮含量逐渐下降，C24在N25浓度下，第14天含量仅是第2天的49.95%。氮浓度对感病品系03B9和P8-2的细胞膜透性和MDA含量的影响比抗病品系C24和P8-1大，感病品系细胞膜结构遭到破坏，可能是小黑点发生的原因。

关键词: 野生番茄, 野生番茄, 栽培番茄, 指纹图谱, CAPS, SSR

Abstract:

Abstract: The effects of three nitrogen(N) levels （5，15，25mmol/L）hydroponic culture on plasmalemma permeability, polyphenoloxidase(PPO) activity ,the content of ammonium nitrogen and malonialdehyde (MDA) in Chinese cabbage disease-susceptible strains 03B9 and P8-2 and disease -resistant strains C24 and P8-1, and the relationship with petiole spot were studied. The results showed that high nitrogen level can increase the number of petiole spots. The content of ammonium nitrogen in disease -resistant varieties have fallen and the 14th day ammonium nitrogen of the treatment N25 is only 49.95% of the second day in C24.The effects of nitrogen levels are more significant in 03B9 and P8-2 than C24 and P8-1,so petiole spot may caused by the broken plasmalemma .