诱导了蜘蛛和血管枯真菌之间的耐药性和物种间竞争
Science (New York, N.Y.)
|February 6, 1987
概括
之前暴露于蜘蛛的棉花苗显示出较少的病菌病原体Verticillium dahliae引起的病变症状. 相反,蜘蛛Tetranychus urticae的种群在感染V. dahliae的植物上增长较慢,这表明与宿主植物共享的无关生物之间存在强烈的相互作用.
科学领域:
- 植物病理学 植物病理学
- 生态生态学 生态生态学
- 昆虫学 昆虫学是一门学科.
背景情况:
- 植物病原体和食草动物可以显著影响宿主植物的健康和生理.
- 一个生态系统中不同食物层之间的相互作用可以导致复杂的生态结果.
- 了解非相关生物之间的植物间接相互作用对于预测社区动态至关重要.
研究的目的:
- 为了研究真菌病原体Verticillium dahliae和蜘蛛Tetranychus urticae在棉花植物上的相互作用.
- 为了确定先前对一种生物体的暴露是否会影响棉花植物对另一种生物体的敏感性.
- 评估病原体或草食动物攻击对宿主植物适合其他生物体的影响.
主要方法:
- 在一个受控的实验设置中,棉花苗被暴露在Verticillium dahliae,Tetranychus urticae或两者之间.
- 在暴露于病原体的苗木中,评估了垂菌的疾病严重程度.
- 蜘蛛种群的增长在带有或没有病原体注射的幼苗上进行了监测.
主要成果:
- 以前接触过蜘蛛的棉花苗对Verticillium dahliae感染的敏感性降低.
- 用Verticillium dahliae注射导致棉花幼苗上Tetranychus urticae的种群增长减少.
- 病原体和食草动物的攻击都对棉花植物作为宿主的整体适应性产生了负面影响.
结论:
- 在Verticillium dahliae和Tetranychus urticae之间存在着重要的相互作用,这种相互作用是由棉花宿主植物介导的.
- 蜘蛛的先前草食性可以使棉花对真菌病原体产生抵抗力.
- 宿主植物对一种生物体的攻击反应可能会改变它对其他无关的生物体的适应性,这表明植物群体中存在强烈的间接相互作用.
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