Moles Angela T, Ackerly David D, Webb Campbell O, Tweddle John C, Dickie John B, Pitman Andy J, Westoby Mark
National Center for Ecological Analysis and Synthesis, 735 State Street, Santa Barbara, CA 93101-5304, USA.
Proc Natl Acad Sci U S A. 2005 Jul 26;102(30):10540-4. doi: 10.1073/pnas.0501473102. Epub 2005 Jul 19.
We used correlated divergence analysis to determine which factors have been most closely associated with changes in seed mass during seed plant evolution. We found that divergences in seed mass have been more consistently associated with divergences in growth form than with divergences in any other variable. This finding is consistent with the strong relationship between seed mass and growth form across present-day species and with the available data from the paleobotanical literature. Divergences in seed mass have also been associated with divergences in latitude, net primary productivity, temperature, precipitation, and leaf area index. However, these environmental variables had much less explanatory power than did plant traits such as seed dispersal syndrome and plant growth form.
我们使用关联分歧分析来确定在种子植物进化过程中，哪些因素与种子质量的变化联系最为紧密。我们发现，种子质量的分歧与生长形式的分歧之间的关联，比与任何其他变量的分歧之间的关联更为一致。这一发现与当今物种中种子质量和生长形式之间的紧密关系以及古植物学文献中的现有数据相一致。种子质量的分歧还与纬度、净初级生产力、温度、降水量和叶面积指数的分歧有关。然而，与种子传播综合征和植物生长形式等植物性状相比，这些环境变量的解释力要小得多。
