Embryology and relationships ofGyrocarpus andHernandia (Hernandiaceae)
Embryology and relationships ofGyrocarpus andHernandia (Hernandiaceae)
复制标题
绞果树和海南迪亚（海南迪亚科）的胚胎学和亲缘关系
DOI：
10.1007/bf02344358
复制
发表时间：
1995
影响因子：
2.8
通讯作者：
H. Tobe
中科院分区：
文献类型：
--
作者：
Kweon Heo;H. Tobe
本文对海南岛蕨科的两个代表属-三叠果属（Gyrocarpus）和海南岛蕨属（Hernandia）进行了胚胎学研究，以进一步了解它们各自的进化地位。以金粟兰科或番荔枝科与其他月桂科的比较（作为木兰目的代表）作为樟目的外群（如果存在的话，加上其他相关的类群）支持这两个属的月桂科亲缘关系，因为在合点处存在分枝的叶鞘维管束（突触形态），但没有提供Hernandiarather与樟科分离的证据。Hernandiarather与樟科共有两个无形态象（即，Hernandiais与Gyrocarpus共同的祖先系有很大的差异，甚至在属内也有多样性。根据胚胎学和其他来源的证据，似乎最好接受通常被接受的两个独立的亚科：一个是衍生的亚科Hernandioideae，另一个是不太特化的Gyrocarpoideae。
Two representative genera of Hernandiaceae,GyrocarpusandHernandia, were investigated embryologically to contribute to a better understanding of their respective evolutionary position. Comparisons with other lauralean families using Chloranthaceae or Annonaceae (as a representative of Magnoliales) as an outgroup of Laurales (if present, plus other related taxa) support a lauraceous affinity for the two genera because of the presence of ramified raphal vascular bundles at the chalaza (a synapomorphy), but do not provide evidence for the separation of Hernandiaceae from Lauraceae.Hernandiarather shares with Lauraceae two apomorphies (i.e., the seed pachychalazy and the ruminate seed) which may be homoplasies judged from results of cladistic and molecular studies published elsewhere.Hernandiais greatly divergent from an ancestral line common withGyrocarpusand is even diversified within the genus. Based on evidence from embryology as well as from other sources, it seems best to accept two separate subfamilies in Hernandiaceae as usually have been accepted: one is a derived subfamily Hernandioideae, and the other a less specialized Gyrocarpoideae.