Botanical Studies in the Genus Oryza I. Morphological and Anatomical Investigations of Glume- and Leaf-Surface with the SUMP and Histological Method
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In order to examine the detail structure of flowering glume and leaf surface, the studies were made on the flowering glumes of 22 species and leaves of 20 species belonging to the genus Oryza by the convenient SUMP (SUZUKI's Universal Microprinting) method and maceration method.1) Glume surface: i : Section Sativae: The cells are square-shaped or rectangular and regularly arranged. Each cell bears a round tubercle and has a smooth surface. The tubercle gives the impression of a bursting membrane. Histologically, the short cells and the long cells are adjacent to one another as the tubercles result from uneven thickening at the points of contacts of six cells which consisted of four long and two short cells. The cells are much reduced in size. ii : Section Granulatae : The cells are rectangular and have irregular contours. Each cell has a tubercle composed of several tuberclets. Histologically, with short cells not usually adjacent in arrangement, the tubercles are formed over the area, where two short and two long cells are in contact. iii : Section Coarctatae : The cells are slender and without tubercles. They are arranged in long stripes with deep grooves between them. Species belonging to this section show a great variation in structure. Histologically, one of the species, O. ridleyi has not tubercle. Otherwise the cells are very similar to those of the species belonging to Section Sativae. iv : Section Rhynchoryza: The cells are polygonal, varying in size and are arranged like the scales of a tortoise shell. They have in the middle a globe-shaped tubercle. Histologically, the cells are of equal size and are arranged like fish scales, and seldom short cells occur.2) Leaf surface: Specific characteristic of each species found in leaf surface are fewer than that of glume surface. However, the following characters are useful for taxonomical keys ; ratio of long and short cells ; shape of cells ; number and arrangement of knots found in each cell ; location, shape, size of stoma ; degree of differences found in high and low from the cell surface (=groove's depth) ; thickening of cell wall ; number and length of hairs.3) It is concluded that the morphology of flowering glume and leaf could be used as a good taxonomic characters in the genus Oryza.
- 鹿児島大学の論文
- 1969-03-25
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