Ultrastructural Studies of Leaf Hydathodes : II. Rice (Oryza sativa) leaf tips

Japanese Journal of Crop Science

Eizo MAEDA¹  Kazuko MAEDA¹ 

关键词: Cell wall ingrowth;    イネ;    Hydathode;    Oryza sativa;    Intercellular spaces;    細胞間隙;    Leaf tip;    細胞壁内向突起;    導管節;    Rice;    排水組織;    Ultrastructure;    葉の先端;    Vessel element;    微細構造;   

DOI  :  10.1626/jcs.57.733

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The structure of hydathode in the leaf tip of indoor-grown and outdoor-grown rice plants was examined by light and transmission electron microscopy. Terminal ends of large-sized vessel elements are in direct contact with some cells of the epidermis covering the extreme tips of. the leaves. Expanded intercellular spaces directly adjoin thin cell wall of the large vessel elements. The cell wall of vessel elements exhibited a secondary thickness in places. Intercellular spaces are occasionally occupied with numerous bacteria. Mesophyll parenchyma cells surrounding the vessel elements characteristically have cell wall ingrowths developed slightly. The mesophyll cells sometimes contain electron dense deposits which are tightly packed between cell wall and plasmamembrane. Microbodies are often present in the mesophyll cells. From these results, it was elucidated that rice leaf hydathode principally consists of large-sized vessel elements, the adjoining expanded intercellular spaces and water pores.

【 授权许可】

Unknown