Plant growth rates and seed size: a re-evaluation.
Plant growth rates and seed size: a re-evaluation.
复制标题
DOI：
10.1890/11-0261.1
复制
发表时间：
2012-06
期刊：
影响因子：
4.8
通讯作者：
Lindsay A. Turnbull;Lindsay A. Turnbull;C. Philipson;D. Purves;R. Atkinson;J. Cunniff;A. Goodenough;Y. Hautier;J. Houghton;T. Marthews;C. Osborne;C. Paul-Victor;K. Rose;P. Saner;Samuel H. Taylor;F. Woodward;A. Hector;A. Hector;M. Rees
中科院分区：
文献类型：
--
作者：
Lindsay A. Turnbull;Lindsay A. Turnbull;C. Philipson;D. Purves;R. Atkinson;J. Cunniff;A. Goodenough;Y. Hautier;J. Houghton;T. Marthews;C. Osborne;C. Paul-Victor;K. Rose;P. Saner;Samuel H. Taylor;F. Woodward;A. Hector;A. Hector;M. Rees
据报道，小种子植物物种通常具有较高的相对生长率或 RGR。然而，由于 RGR 随着植物长大而下降，因此小种子物种可以仅凭借其较小的尺寸而获得更高的 RGR。相比之下，规模标准化增长率或 SGR 可以排除这些规模效应。因此，SGR 的差异只能是由于形态、分配或生理学的差异造成的。我们使用非线性回归来计算 SGR，以便与跨越多种生命形式的 10 组物种的 RGR 进行比较。我们发现几乎所有组的 RGR 都与种子质量呈负相关，但 SGR 和种子质量之间的关系变化很大。我们得出的结论是，小种子物种有时只具有超出其总体尺寸优势的额外适应能力，可以快速生长。
Small-seeded plant species are often reported to have high relative growth rate or RGR. However, because RGR declines as plants grow larger, small-seeded species could achieve higher RGR simply by virtue of their small size. In contrast, size-standardized growth rate or SGR factors out these size effects. Differences in SGR can thus only be due to differences in morphology, allocation, or physiology. We used nonlinear regression to calculate SGR for comparison with RGR for 10 groups of species spanning a wide range of life forms. We found that RGR was negatively correlated with seed mass in nearly all groups, but the relationship between SGR and seed mass was highly variable. We conclude that small-seeded species only sometimes possess additional adaptations for rapid growth over and above their general size advantage.