Zhang Jianhua
Department of Biology, McGill University, 1205 Ave Dr. Penfield, H3A 1B1, Montreal, PQ, Canada.
Oecologia. 1995 Jun;102(3):353-360. doi: 10.1007/BF00329802.
Cakile edentula produces upper and lower dimorphic seeds which disperse long and short distances, respectively, from the parent. Canonical discriminant analysis was used to determine the differences between plants from the two seed morphs in both the amount and direction of their overall plastic responses to major environmental factors. In general, plants from the long-distance dispersal seeds were less plastic than those from the short-distance dispersal seeds in response to soil moisture and sand burial. This is probably a result of broader ecological amplitude of the plants from the long-distance dispersal seeds due to their larger seed masses. Differences in the direction of overall plasticity between plants from the two seed morphs are not likely to be adaptive. However, phenotypic selection may affect the relative contribution of plants from the two seed morphs to the next generation.
无齿卡基芥产生上下两种二态性种子，它们分别从母体远距离和近距离扩散。典型判别分析用于确定两种种子形态的植株在对主要环境因素的整体可塑性反应的数量和方向上的差异。总体而言，在对土壤湿度和沙埋的反应中，远距离扩散种子的植株比近距离扩散种子的植株可塑性更低。这可能是由于远距离扩散种子的植株种子质量较大，生态幅度更宽。两种种子形态的植株在整体可塑性方向上的差异不太可能具有适应性。然而，表型选择可能会影响两种种子形态的植株对下一代的相对贡献。
