Effects of seed size and emergence time on tree seedling establishment: importance of developmental constraints
Effects of seed size and emergence time on tree seedling establishment: importance of developmental constraints
复制标题
DOI：
10.1007/s004420051007
复制
发表时间：
2000-05
期刊：
影响因子：
2.7
通讯作者：
K. Seiwa
中科院分区：
文献类型：
--
作者：
K. Seiwa
为了评估发育限制在确定种子大小和出苗时间的相对重要性方面的重要性，在早期演替生境中与高大草本植物竞争的条件下，观察了具有对比生长物候学的两种木本物种的早期幼苗表现。橡树 Quercus mongolicavar.grosseserrata 具有确定的芽发育（单叶冲洗），显示出种子大小对随后的幼苗高度生长和存活的显着影响。由于生长是确定的，出苗时间的影响可以忽略不计。核桃Juglans ailanthifolia在整个生长季节持续产生新叶（发育不确定），出苗时间对幼苗表现有显着影响，因为它影响了可实现的生长量；然而，随着幼苗的生长，种子大小的影响可以忽略不计。这些结果表明，种子大小和出苗时间对早期幼苗性能的相对重要性与发育限制（生长物候）密切相关。
To evaluate the importance of developmental constraints in the determination of the relative importance of seed size and emergence time, early seedling performance of two woody species with contrasting growth phenology were observed under competitive conditions with tall herbs in an early successional habitat. The oak,Quercus mongolicavar.grosseserrata, with determinate shoot development (a single leaf flush), showed a marked influence of seed size on subsequent seedling height growth and survival. Because of determinate growth, emergence time had negligible effects. The walnut,Juglans ailanthifolia,which continued to produce new leaves throughout the growing season (indeterminate development), showed a marked influence of time of emergence on seedling performance, because it affected the amount of growth that could be achieved; seed size, however, had negligible effects as the seedlings grew. These results suggest that relative importance of seed size and emergence time for early seedling performance is closely associated with developmental constraints (growth phenology).