欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2010, Vol. 29 ›› Issue (12): 2401-2407.

• 研究报告 • 上一篇    下一篇

意大利蝗对四种寄主植物的选择机制

王晗,何雪青,季荣   

  1. 新疆师范大学生命科学学院| 乌鲁木齐 830054
  • 出版日期:2010-12-08 发布日期:2010-12-08

Selection mechanisms of Calliptamus italicus on four different host plants.

WANG Han, HE Xue-qing, JI Rong   

  1. College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
  • Online:2010-12-08 Published:2010-12-08

摘要: 意大利蝗(Calliptamus italicus)是新疆草原的优势危害蝗虫种类之一。本研究利用GC-MS和嗅觉仪分析了意大利蝗对其寄主植物冷蒿(Artemisia frigida)、沙漠绢蒿(Seriphidium santolinum)、黄花苜蓿(Medicago falccata)、黄花草木樨(Melilotus officinali)的选择机制。结果表明:4种植物所含的主要挥发油为萜类和醇类化合物,萜类化合物含量从高到低依次为冷蒿(51.76%)、黄花苜蓿(20.52%)、黄花草木樨(19.46%)、沙漠绢蒿(9.00%);醇类化合物含量从高到低依次为黄花草木樨(33.48%)、沙漠绢蒿(20.26%)、黄花苜蓿(16.80%)、冷蒿(1.74%);不同寄主植物对意大利蝗的引诱效果不同,引诱率从高到低依次为冷蒿(56.00%)、沙漠绢蒿(36.12%)、黄花苜蓿(30.47%)和黄花草木樨(10.00%);意大利蝗对4种寄主植物的采食量与植物体内总黄酮含量的关系表明,食量与植物体内总黄酮的含量呈负相关(r=-0.601),意大利蝗喜食黄酮类化合物含量较低的冷蒿,而对黄酮类化合物含量较高的黄花草木樨表现出驱避。研究表明,寄主植物中所含的萜类化合物对意大利蝗有明显的引诱作用,而醇类和黄酮类化合物则对意大利蝗有明显的驱避作用。

关键词: 塔克拉玛干沙漠腹地, 土壤微生物, 土壤因子, 咸水灌溉

Abstract: Calliptamus italicus is a predominant pest on Xinjiang grassland. In this paper, GS-MS and olfactometer were applied to study the selection mechanisms of C. italicus on its host plants Artemisia frigida, Seriphidium santolinum, Medicago falccata, and Melilotus officinali. The results showed that terpenoid and alcoholic compounds were the main volatile substances in the four host plants. The terpenoid content in A. frigida, S. santolinum, M. falccata, and M. officinal was 51.76%, 9.00%, 20.52%, and 19.46%, and the alcoholic compounds content was 1.74%, 20.26%, 16.80% and 33.48%, respectively. Different host plants had different attraction effect on C. italicus, with the attraction rate of A. frigida, S. santolinum, M. falccata, and M. officinali being 56.00%, 36.12%, 30.47%, and 10.00%, respectively. Statistical analysis indicated that the host plant biomass eaten by C. italicus was negatively correlated with the flavone content in host plants (r=-0.601). C. italicus preferred A. frigida, in which, the flavone content was the lowest, and repelled M. officinali, in which, the flavone content was the highest. It was suggested that the terpenoid in host plants had obvious attraction effect to C. italicus, while the alcoholic compounds and flavone contents had obvious repellent effect.

Key words: Hinterland of Takilimakan Desert, Soil microorganisms, Soil factors, Irrigating by salt water