...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Journal of Botany >Consequences of variation in flowering time within and among individuals of Mertensia fusiformis (Boraginaceae), an early spring wildflower
【24h】

Consequences of variation in flowering time within and among individuals of Mertensia fusiformis (Boraginaceae), an early spring wildflower

机译：早春野花Mertensia fusiformis（Boraginaceae）内和个体间开花时间变化的后果

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Climate change is causing many plants to flower earlier in spring, exposing them to novel selection pressures, including—potentially—pollinator shortages. Over 2 years that contrasted in timing of flowering onset, we studied reproductive strategies, pollen limitation, and selection on flowering time in Mertensia fusiformis, a self-incompatible, spring-flowering perennial. Plants opened most of their flowers early in the flowering period, especially in 2007, the early year; but selection favored early-flowering individuals only in 2008. However, resource allocation to early vs. late seed production was flexible: In 2008, but not 2007, early flowers on a plant produced more and heavier seeds. Late flowers were capable of equal seed production if fertilization of early ovules was prevented, suggesting that late flowers serve a bet-hedging function. Evidence for pollen limitation was weak, although there was a tendency for early flowers to be pollen-limited in 2007 and for late flowers to be pollen-limited in 2008. Poor reproductive success in 2007 was likely attributable less to pollen limitation than to frost damage to flowers. We suggest that plasticity in floral longevity and resource allocation among flowers will make this species resilient to short-term pollinator deficits; whether this will help or hinder future adaptation is unclear.
机译：气候变化导致许多植物在春季早些时候开花， 使它们面临新的选择压力，包括（可能）授粉媒介 短缺。与开花 发作时间相反的两年多时间里，我们研究了自交不亲和的 > 常年开花。植物在开花期的早期，大多数花朵都开始开放，特别是在2007年，即早期的 年。但是在2008年，选择只偏爱早花的个体。然而，早种子与晚种子生产的资源分配是灵活的：2008年而不是2007年，早花 > 在植物上产生的种子越来越重。如果阻止早期胚珠 的受精，则晚花 能够产生相同的种子，这表明晚花具有对冲交易的功能。尽管 在2007年有早期花朵受花粉限制的趋势，而在2008年有晚花受到花粉限制的趋势。 2007年的sup> 繁殖成功可能是由于 花粉限制而不是霜冻对花朵的损害。我们建议 花的寿命和资源分配中的可塑性 将使该物种对短期 授粉媒介缺陷具有适应性；目前尚不清楚这是否会帮助或阻碍将来的适应。

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