Toward a new synthesis: Major evolutionary trends in the angiosperm fossil record
Toward a new synthesis: Major evolutionary trends in the angiosperm fossil record
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DOI：
10.1073/pnas.97.13.7030
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发表时间：
2000-06-20
影响因子：
11.1
通讯作者：
Dilcher, D
中科院分区：
文献类型：
--
作者：
Dilcher, D
被子植物古植物学拓宽了视野，采用了新技术，开发了新的数据库，并接受了新的问题，现在可以集中在该组的进化。早期开花植物的化石记录在解决被子植物的进化问题上发挥着积极的作用。被子植物起源和被子植物辐射。被子植物辐射的三个基本节点被确定：（i）关闭的心皮和美丽的径向对称的花，（ii）双边花，和（iii）肉质果实和营养坚果和种子。这些都是共同进化的事件，在被子植物进化过程中随着时间的推移而传播。有人提出，被子植物的遗传学迫使该群体向有利于异交的生殖系统进化。这导致被子植物中最强的选择指向花、果实和种子。这就是为什么这些器官往往为群体提供最好的系统特征。
Angiosperm paleobotany has widened its horizons, incorporated new techniques, developed new databases, and accepted new questions that can now focus on the evolution of the group. The fossil record of early flowering plants is now playing an active role in addressing questions of angiosperm phylogeny. angiosperm origins, and angiosperm radiations. Three basic nodes of angiosperm radiations are identified: (i) the closed carpel and showy radially symmetrical flower, (ii) the bilateral flower, and (iii) fleshy fruits and nutritious nuts and seeds. These are all coevolutionary events and spread out through time during angiosperm evolution. The proposal is made that the genetics of the angiosperms pressured the evolution of the group toward reproductive systems that favored outcrossing. This resulted in the strongest selection in the angiosperms being directed toward the flower, fruits, and seeds. That is why these organs often provide the best systematic characters for the group.