中国水稻科学

中国水稻科学 ›› 2012, Vol. 26 ›› Issue (6): 746-750.DOI: 10.3969/j.issn.10017216.2012.06.016

• 研究简报 • 上一篇    下一篇

旱稻孢囊线虫生活史及侵染特性

丁中1,2,NAMPHUENG Janthathang 1,何旭峰 1,伍敏敏 1,洪宏 1   

  1. 1湖南农业大学 生物安全科学技术学院， 湖南 长沙 410128；2植物病虫害生物学与防控湖南省重点实验室， 湖南 长沙 410128；
  • 收稿日期:2012-02-21 修回日期:2012-07-12 出版日期:2012-11-10 发布日期:2012-11-10
  • 通讯作者: 丁中1,2
  • 基金资助:

    公益性行业（农业）科研专项经费资助项目（200903040）。

Life Cycle and Infection Characteristics of Rice Cyst Nematode, Heterodera elachista Ohshima in Rice

DING  Zhong 1，2 , NAMPHUENG  Janthathang 1 , HE  Xufeng 1 , WU  Minmin 1 , HONG  Hong 1   

  1. 1 College of Biosafety Science & Technology, Hunan Agricultural University, Changsha 410128, China; 2 Hunan Provincial Key Laboratory for Biology and Control of Plant Disease and Insect Pests, Changsha 410128, China;
  • Received:2012-02-21 Revised:2012-07-12 Online:2012-11-10 Published:2012-11-10
  • Contact: 丁中1,2

PDF

被引次数

10

摘要： 以2龄幼虫人工接种水稻幼苗和田间定点调查的方法，研究了旱稻孢囊线虫的生活史和侵染特性。结果表明，在30℃下接种后24 h内，2龄幼虫大多聚集在根尖分生区或伸长区，接种后24 h可侵入根系，侵入后虫体在中柱建立取食点；接种后6 d，2 龄幼虫发育成白雌虫，8 d发育成雄虫，12 d雌虫从阴门处产生胶状物质，雌虫的一部分卵产于胶质卵囊中。接种后18 d，胶质卵囊中的2龄幼虫开始孵化。在30℃下，旱稻孢囊线虫从卵到卵的最短生活周期为22 d；从接种到2龄幼虫从胶质卵囊中孵出，最短生活周期为18 d。20℃下线虫发育缓慢。较高温度如28℃~35℃有利于2龄幼虫的侵染和发育。淹水条件不利于2龄幼虫的侵染，但对孢囊的发育无显著影响。

关键词: 旱稻孢囊线虫, 生活史, 侵染特性

Abstract: Life cycle and infection characteristics of Heterodera elachista in rice were investigated by   artificial inoculations with secondinstar juveniles in laboratory and  investigation  in rice field. The secondinstar juveniles were attracted nearby the meristem zone or elongation zone of rice root tips within 24 h, invaded and established feeding sites in the central cylinder of roots within 24 h at 30℃. After penetration, the juveniles developed into white females within six days and males within eight days. The gelatinous matrixes were secreted by the females from vulva within 12 days. Parts of eggs were released into the egg sac and parts of eggs were retained within the body of the brown cyst. The secondinstar juveniles were emerged from egg mass within 18 days. The development of nematode were very slow below 20℃. The shortest life cycle at 30℃ from the infective juvenile to the emergence of secondinstar juvenile is 18 days long while from egg to egg stage is 22 days.  Relatively high temperatures(28~35℃) were favored to the invasion and development of H. elachista，while  waterlogging reduced the rates of invasion and had no influence on the development of H. elachista.

Key words: Heterodera elachista, life cycle, infection characteristic

中图分类号: