花粉膜の表面構造に関する電子顕微鏡的研究 IV

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The writers have already published in the journals of Japanese forestry society the investigations concerning the fine structure of the surface of the tree pollen membrane of 15 species (12 family・14 genus). They now give the report IV about the clarified points of the fine structure of the surface of the pollen membrane of 9 species (See, Table 1) belonging to broad leaved trees. The outline of the report is as follows : 1) Pollen of Populus nigra var. italica DUR.; over the surface of the grain are irregularly arranged the nearly round shallow concaves of about 0.2-0.5μ in diameter, and between each concaves there are protrusions with fine spinules projected from the surface of it. Also, in the parts of mesh concave are found fine furrow shapes. 2) Pollen of Salix babylonica LIN.; over the surface of the grain can be seen the sunken meshes giving irregular forms. In each of the parts of mesh concave are projected (one to several) verrucae different in size. 3) Pollen of Salix Kinuyanagi KIM.; the fine structure in the surface of the grain is nearly similar to that of Salix babylonica described above. According to Fig. 4,the presence of verrucae in the germinal zone is also confirmed. The size of the mesh sunken from exine (Max. length) is about 0.1-2.5μ. 4) Pollen ofCorylus Sieboldiana Bl.; the surface of the grain is covered with many fine spinules, and they can be seen also in the pore membrane. The length of these spinules is about 0.1-0.3μ. Besides, the bow-shaped protrusions among the germ pores which are found often in the pollen of Betulaceae cannot be found here. 5) Pollen of Corylus heterophylla FSCH.; the pattern of the surface, the shape of the germ pore and the length of spinules etc. are found little different from the case of Corylus Siebol diana. Besides, no protrusions of bow-shape are found among the germ pore. 6) Pollen of Betula papyrifera MARSH.; the surface of the grain is covered with many fine spinules, and they can be seen also in the germ pore part. The length of these spinules is about 0.1-0.3μ. The shape of the germ pore is nearly elliptic, and the protrusions of bow-shap are found among them. The length of the ellipsoid is about 2.5×4.0 in diameter. 7) Pollen of Alnus japonica SIEB. et ZUCC.; the pattern of the surface, the shape of the germ pore and the length of spinules etc. are found little different from the case of Betula papyrifera. However, each of the bow-shaped sides between the germ pore is considerably protuberant. 8) Pollen of Alnus pendula MATSUM.; little different from the case of Alnus japonica. 9) Pollen of Celtis sinensis var. japonica NAK.; the surface of the grain is irregularly dotted with verrucae, the hight of which is about 0.1-0.3μ. The germ pore is a little rising from the surface of the grain, and shows a round shape. The grain is found a little different in the surface structure from that covered with spinules as described above.
1958-08-01

花粉膜の表面構造に関する電子顕微鏡的研究 IV

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