Embryology and phylogeny of glucosinolate-producing plants.

已知被子植物中有15个科产生芥子油苷或芥子油苷，它们包括菊科、山柑科、辣木科、萨尔瓦多科、大戟科（仅核果木属）。它们的系统发育关系一直不确定。在目前的研究项目中，我提出了各种植物群的胚胎学，这些植物群的信息仍然缺乏，并在胚胎学证据的基础上，讨论它们之间和内部的关系。新的胚胎学信息和/或新发现总结如下。（1）Canotia与Koebelinia没有密切关系，Koebelinia具有myrosin细胞，经常与Canotia一起讨论，而是在Celastrales中。（2）萨尔瓦多科没有种子结构，适合与任何其他产生芥子油苷的家庭。（3）麦格雷戈属（Macgregoria）是与硫代葡萄糖苷产生菌亲缘关系较近的一个类群，与不含硫代葡萄糖苷的沙蚕科（Stackhousiaceae）关系密切。(4)A因此，即使14个产生芥子油苷的科（不包括大戟科）在分子水平上是单系的，但胚胎学特征与许多其他形态学或分类学特征一样，也向不同的方向进化。

Fifteen families are known to produce myrosin or glucosinolates in angiosperms, and they include Brassicaceae, Capparaceae, Moringaceae, Salvadoraceae, Euphorbiaceae (Drypetes only). Their phylogenetic relationships have been uncertain. In the present research project I presented embryology of various plant groups whose information are still lacking and, on the basis of embryological evidence, discuss relationships among and within them. New embryological information and/or new findings are summarized as follows. (1)Canotia is not closely related to Koebelinia which has myrosin cells and has often discussed together with Canotia, and is rather at home within Celastrales. (2)Salvadoraceae have no seed structure that fits in with that of any of the other glucosinolate-producing families. (3)Macgregoria, which has been suggested as one of candidates having close relationships to the glucosinolate-producing families, is well at home in Stackhousiaceae which has no gluosinolates. (4)A glucosinolate-producing genus Drypetes (including Liodendron) and a non-glucosinolate-producing genus Poranthera both are well suitable in Euphorbiaceae embryologically.In conclusion, even if 14 glucosinolate-producing families (excluding Euphorbiaceae) are monophyletic as indicated by macromolecular evidence, embryological characters like many other morphological or taxonomical characters have evolved towards diverse directions.