...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant Ecology >Herbivory tolerance and compensatory differences in native and invasive ecotypes of Chinese tallow tree (Sapium sebiferum).
【24h】

Herbivory tolerance and compensatory differences in native and invasive ecotypes of Chinese tallow tree (Sapium sebiferum).

机译：牛脂树（Sapium sebiferum）原生和入侵生态型的食草耐受性和补偿差异。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Evolution of Increased Competitive Ability (EICA) hypothesis proposes that exotic plants may become superior competitors in their introduced ranges because they have evolved reduced defence allocation and increased growth in response to low herbivory. Long-term common garden studies with Chinese tallow tree (Sapium sebiferum), a problematic invader in the southeastern United States, support EICA predictions of invasive ecotypes displaying rapid growth with poorly defended leaves, whereas native ecotypes are slower growing and have nitrogen rich, highly defended leaves. We conducted two full-factorial experiments designed to assess the effects of leaf herbivory and soil fertility on growth of Sapium seedlings derived from seeds obtained in the species 9 native Chinese range and introduced range along the Texas Gulf Coast. The first was a field study employing simulated defoliation to examine herbivory tolerance, while the second was a pot study using grasshopper bioassays to measure the compensatory regrowth of native and introduced Sapium ecotypes. In accordance with EICA predictions, introduced Texas ecotypes compensated for mechanical and natural defoliation regardless of resource conditions while growth of native Chinese ecotypes was significantly reduced as a result of both simulated and natural herbivory damage. These results demonstrate that invasive Sapium ecotypes have a greater capacity to compensate for herbivory damage than native Sapium ecotypes. The differences between Sapium ecotypes are consistent with the mechanisms of EICA and other findings demonstrating that invasive ecotypes have become herbivory tolerant due to post-introduction changes in tissue quality..
机译：竞争能力增强的进化（EICA）假设提出，外来植物可能会在其引入的范围内成为优势竞争者，因为它们已经进化出减少的防御分配和对低草食性的响应而增长。对美国东南部一个有问题的入侵者中国牛脂树（Sapium sebiferum）进行的长期常规花园研究支持了EICA的预测，即侵入性生态型显示出快速生长且叶片防护不佳，而原生生态型生长较慢且富含氮，高度捍卫的叶子。我们进行了两个全要素实验，旨在评估叶片草食性和土壤肥力对来自9种中国本土物种并在德克萨斯州墨西哥湾沿岸引入物种的种子衍生的S汁幼苗生长的影响。第一个是使用模拟脱叶来研究草食性耐受性的田间研究，第二个是使用蚱bio生物测定法来测量原生和引进的Sapium生态型的补偿性再生长的盆栽研究。根据EICA的预测，无论资源条件如何，引入的得克萨斯州生态型都能补偿机械和自然的落叶，而模拟和天然食草动物的破坏都大大降低了中国本土生态型的生长。这些结果表明，与天然Sapium生态型相比，侵入性Sapium生态型具有更大的补偿食草动物损害的能力。 Sapium生态型之间的差异与EICA的机制一致，其他发现表明，由于引入后的组织质量变化，侵入性生态型已成为耐草食性的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号