A COMPARATIVE STUDY ON THE STEM LEAF ANATOMY OF THE THREE WILD RICE SPECIES IN CHINA

The results of study on the anatomy of the stem leaf of Oryza sativa L. f. spontanea Roschev.,O. officinalis Wall. and O. meyeriana Baill. in China indicated that O. sativa L. f. spontanea had full lysigenous space in the internodes,large lysigenous space in the mid rib of the leaf,and the lysigenous path in the large vascular bundles of the leaf.Its mesophyll cells were arranged compactly and its cell walls were much inwardly folded.In the lysigenous space in the internodes of O. officinalis remained some membranes. O. meyeriana had neither large lysigenous space in the internodes and leaf mid rib nor the lysigenous path in the large vascular bundles of the leaf.The results mentioned above showed that the three wild rice species having different anatomical structures adapted to growing in the water-grown and high solar-radiation ecotype of the swamp-land, the wet and little-sunlight ecological conditions of the mountain valley and the xerophilous and shady ecological environment, respectively.The autho     

中国三种野生稻种茎叶解剖的比较研究

本文对中国普通野生稻(Oryza sativa L.f.spontanea)、药用野生稻(O.officinalisWall.)及疣粒野生稻(O.meyeriana Baill.)茎叶形态解剖观察表明:普通野生稻节间具完整中空通气腔。叶片主脉具大气腔和大维管束有破生通气道。叶肉细胞排列紧密、细胞壁向内皱折程度高。药用野生稻节间通气腔内具有膜状物。疣粒野生稻节间和叶片主脉均没有通气腔。叶片大维管束没有通气道。这反映三者分别适应于沼泽水生开阳、山谷湿生寡照和陆生荫蔽生态条件的特点。其解剖特征与其地理分布生态条件相一致。作者认为三种野生稻的茎叶有无通气腔、叶片的泡状细胞形态及维管束结构、叶表上气孔形态与乳头状突起的分布,这些差异,可作为区分和鉴别三种野生稻的解剖学依据。