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Electron Microscope Study ofAmbrosiaPollen (Compositae: Ambrosieae)

机译:Ambrosia花粉(菊科:Ambrosieae)的电子显微镜研究

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This study presents a detailed survey and discussion of the fine structure ofAmbrosiapollen. Representatives from all evolutionary groups and geographical regions are used, including 37 species and four hybrids. No significant differences are found among the species, a circumstance supportive of the congeneric nature ofAmbrosiaL. andFranseriaCav. hypothesized earlier from other evidence. The similarities of the pollen ofAmbrosiato that of the Heliantheae and Anthemideae are discussed. Newly observed structural features of the polar and colpal regions are pointed out which support an intermediate position of the Ambrosieae between the Heliantheae and Anthemideae. Possible specializations ofAmbrosiapollen within the tribe are suggested. The data also indicate that among the three closely related genera,Ambrosia, XanthiumandHymenoclea, the relationship ofAmbrosiatoHymenocleais closest.
机译:本研究对Ambrosiapollen的精细结构进行了详细的调查和讨论。使用了来自所有进化群体和地理区域的代表,包括 37 个物种和 4 个杂交种。物种之间没有发现显着差异,这种情况支持AmbrosiaL的同类性质。和FranseriaCav。较早从其他证据中推测。讨论了Ambrosiato花粉的相似之处,Heliantheae和Anthemideae的花粉。指出了新观察到的极地和colpal地区的结构特征,这些特征支持了Ambrosieae在Heliantheae和Anthemideae之间的中间位置。提出了部落内Ambrosiapollen的可能专业化。数据还表明,在Ambrosia、Xanthium和Hymenoclea这三个密切相关的属中,AmbrosiatoHymenocleais的关系最为密切。

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