›› 2014, Vol. 57 ›› Issue (6): 681-687.doi:

• 研究论文 • 上一篇    下一篇

粘虫下唇须陷窝器及其感器的形态、类型与分布

董钧锋1, 刘   辉2, 汤清波2, 刘   杨3, 赵新成2,*, 王桂荣3,*   

  1. (1. 河南科技大学林学院, 河南洛阳 471003; 2. 河南农业大学植物保护学院昆虫学系, 河南郑州450002; 
    3. 中国农业科学院植物保护研究所, 植物病虫害生物学国家重点实验室, 北京 100193)
  • 出版日期:2014-06-20 发布日期:2014-06-20

Morphology, type and distribution of the labial-palp pit organ and its sensilla in the oriental armyworm, Mythimna separata (Lepidoptera: Noctuidae)

DONG Jun-Feng1, LIU Hui2, TANG Qing-Bo2, LIU Yang3, ZHAO Xin-Cheng2 ,*, WANG Gui-Rong3,*   

  1. (1. College of Forestry, Henan University of Science and Technology, Luoyang, Henan 471003, China; 2. Department of Entomology, College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China; 3. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Online:2014-06-20 Published:2014-06-20

摘要: 【目的】明确我国重要农业害虫粘虫Mythimna separata Walker下唇须和陷窝器形态结构以及陷窝器内部感器的形态、类型与分布。【方法】利用光学显微镜观察粘虫成虫下唇须及陷窝器形态结构,利用扫描电子显微镜观察陷窝器内部的感器。【结果】结果表明,粘虫成虫下唇须似管状,具3节,各节形态和长度不同,其中第2节最长。粘虫下唇须长度雌雄异形,雌性的下唇须长度为2 463.50±143.65 μm,显著短于雄性的(2 566.11±70.28 μm)(t=2.722, df=34, P=0.012)。陷窝器凹坑深约280 μm,开口处直径约50 μm,内部直径约32 μm,雌雄间无显著差异。陷窝器内部的感器主要包括毛形感器和棒状感器2种类型。毛形感器位于陷窝器凹坑的上半部分,而棒状感器分布在陷窝器凹坑的下半部分。雌性毛形感器长为18.20±0.84 μm,显著短于雄性的21.24±0.34 μm(t=3.335, df=30, P=0.003)。而雌性的棒状感器长为14.69±0.48 μm,显著长于雄性的12.31±0.49 μm(t=3.452, df=21, P=0.002)。【结论】粘虫下唇须陷窝器感器分属2大类型,分布于陷窝器内不同的区域,其长度具有性别差异性。本文报道的这些形态学观察结果为进一步研究粘虫下唇须陷窝器感器生理和功能奠定了基础。

关键词: 粘虫, 下唇须, 陷窝器, 感器, 二氧化碳感器; 雌雄异形

Abstract: 【Aim】 To characterize the morphology of the labial palp and the labial-palp pit organ (LPO), including the morphology, type and distribution of LPO sensilla in the oriental armyworm, Mythimna separata Walker. 【Methods】 Light and scanning electron microscopy was used to observe the labial palp, the LPO and the LPO sensilla of M. separata adults. 【Results】 The results showed that the labial palp of M. separata adult is a cylindrical appendage with three segments. Each segment varies in length and the 2nd one is the longest. The labial palp shows sexual dimorphism, and in females its length is 2 463.50±143.65 μm, while in males its length is 2 566.11±70.28 μm (t=2.722, df=34, P=0.012). The pit organ located on the 3rd segment of the labial palp is about 280 μm deep, 50 μm wide at the opening and 32 μm wide inside the pit, with no significant differences between females and males. Two sensillum types were found in both sexes, i.e., hair-shaped and club-shaped sensilla, which are located on the upper and lower of the pit, respectively. The hair-shaped sensilla are significantly shorter in females (18.20±0.84 μm) than in males (21.24 ± 0.34 μm) (t=3.335, df=30, P=0.003). The other main type, the club-shaped sensilla, on the other hand, are significantly longer in females (14.69±0.48 μm) than in males (12.31±0.49 μm) (t=3.452, df=21, P=0.002). 【Conclusion】 The LPO sensilla of M. separata belong to two morphological types, both showing sexual dimorphism in length. The results of this study about the morphological properties of the LPO sensilla provide basic knowledge for further investigation on their physiology and function. 

Key words: Mythimnaseparata, labial palp, labial-palp pit organ, sensilla, carbon dioxide sensilla, sexual dimorphism