Fruit and seed polymorphism and its relation to seedling growth in the genus Cakile
Fruit and seed polymorphism and its relation to seedling growth in the genus Cakile
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DOI：
10.1139/b89-353
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发表时间：
1989-09
期刊：
影响因子：
1.1
通讯作者：
M. Maun;A. M. Payne
中科院分区：
文献类型：
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作者：
M. Maun;A. M. Payne
为了探讨异形果在不可预测的环境中的适应意义，对无齿短翅天蛾Cakile edentula var. lacustris、无齿短吻叶蝉Cakile edentula var.的无齿，和Cakile maritima进行了测试的繁殖体的大小，传播能力，发芽行为和生长速度的差异。上部和下部果瓣在某些属性上存在差异，但在其他属性上没有差异。例如，上节的果实、种子和壳明显比下节的重。然而，每粒种子，壳，和水果的平均质量的频率分布表示一个相当大的区域的重叠下方的直方图的上部和下部的果实段。在温室内静止条件下，青钱柳果实上部和下部的漂浮能力没有差异。无齿变种lacustris和C. maritima在这3个类群中，C.海百合果实的壳籽质量比最高，漂浮时间最长。种子的形态二型性与种子的发育密切相关。
To ascertain the adaptive significance of dimorphism under unpredictable environments, the dimorphic fruit segments of Cakile edentula var. lacustris, Cakile edentula var. edentula, and Cakile maritima were tested for differences in size of propagules, dispersal ability, germination behaviour, and growth rate. The upper and lower fruit segments differed in some attributes but not in others. For example, the fruits, seeds, and shells of upper segments were significantly heavier than those of lower segments. However, the frequency distributions of mean mass per seed, shell, and fruit indicated a considerable zone of overlap beneath the histograms of upper and lower fruit segments. Under still conditions in a greenhouse, no differences were found in the floating ability of upper and lower fruit segments of C. edentula var. lacustris and C. maritima. Of the three taxa, C. maritima fruits had the highest shell to seed mass ratio and floated for the longest period of time. Morphological seed dimorphism was link...