スギ化石花粉の表面微細構造に関する研究

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The pollen of plants has the trace of its original form as the fossil in coals and partial sedimentary rocks. It is thought that the pollen grain fallen into peat bog is gradually following up the process of fossilisation in the present time. How the surface structure of the pollen changes in this process, has an important significance for the identification of the fossil pollen in palynology, as well as for the studies on the fossilisation of the pollen. From this point of view, the writers have selected the Alluvial peat as the material, and attempted the observation by means of electronmicroscope based on the replica method. The materials were taken from the peat layer of Tashirogata bog in Kokakeyama national forest, Nibuna, Todoroki village, Yamamoto-gun, Akita prefecture, at the depth of 1.0m from the surface of the bog. The summay of the results is as follows : 1) The surface of the modern pollen of Cryptomeria japonica is covered all over with granules of the "confetto type" (their diameter being about 0.2∿0.8μ). However, on the surface of the fossil pollen of Cryptomeria japonica no granules of the "confetto type" could be detected. From this point of view, it is thought that the granules above mentioned were separated from the surface of the grain in the fossilising process. 2) And next, we were able to clarify that the texture, after the separation of granules of the "confetto type", of both the modern pollen and the fossil pollen is different between the germinal zone and the other parts. This is important for the identification of both the modern and the fossil pollen. Especially, the texture, after the separation of granules of the "confetto type", of the modern pollen shows fine spinuies (G. Z. : 0.1μ and B : 0.1-0.3μ), while that of the fossil pollen shows fine dotted varrucae (G. Z. : 0.1μ and B : 0.1-0.3μ). 3) From the experimental results (optical and electronmicroscopic) as described above, the writers were able to identify the fossil pollen detected in the Alluvial peat as that of Cryptomeria japonica. 4) This is an example of the pollen of Cryptomeria japonica, but if the study of this kind will be advanced in the future, there will be abtained the result important for the identification of genera or species of fossil pollen of many kinds.
京都府立大学の論文
1959-09-01

スギ化石花粉の表面微細構造に関する研究

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