Abscission of seeds and pollen

种子和花粉脱落

• 批准号: 46315-2006
• 负责人: Greene, David
• 金额: $ 1.36万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=335090
• 关键词: Abscission; seeds; pollen

Models of seed and pollen dispersal by wind are handicapped by our almost complete lack of knowledge regarding the start of the event: abscission. Here I will test the hypotheses that (1) there is a strong bias toward abscission during the early afternoon (when wind speeds and atmosperic instability are maximized while relative humidity is minimized); (2) the abscission response to wind and relative humidity is similar for all plant species in both the tropics and mid-latitudes; (3) there is also a bias toward updrafts rather than downdrafts; (4) the probability of abscission is proportional to the drag force (and thus to the square of the wind speed); and (5) dispersal is almost entirely inland near coasts (due to the mid-day sea breeze) and upslope in the mountains (due to the mid-day anabatic winds).

由于我们几乎完全缺乏关于事件开始的知识，风传播种子和花粉的模型受到了阻碍。在这里，我将检验以下假设：（1）在下午早些时候，（2）在热带和中纬度地区，所有植物对风和相对湿度的响应是相似的;（3）也有一个偏向上升气流而不是下降气流的现象;（4）扩散的可能性与拖曳力成正比（因此与风速的平方成正比）;（5）扩散几乎完全在靠近海岸的内陆（由于中午的海风）和山上的上坡（由于中午的上升风）。