The Ultrastructure of Kranz Cells in the Family Cyperaceae
The Ultrastructure of Kranz Cells in the Family Cyperaceae
复制标题
莎草科Kranz细胞的超微结构
作者：
R. Carolin;S. Jacobs;M. Vesk
对莎草属18种和飘拂草属5种植物叶片的解剖结构和光合细胞的超微结构进行了观察和描述。Kranz细胞都是向心的mestome鞘，其超微结构符合先前报道的NADP-ME型物种的模式，其特征在于高NADP苹果酸酶活性，并形成基于不同的C4酸脱羧系统的C4途径物种的三个亚组之一。在某些莎草属物种中，外周网被安排在较致密的染色基质中的规则小泡的放射状条带中，与放射状条带交替，显示出较不规则的组织和较不深的染色;飘拂草属从未显示出这种安排。
The anatomy of the leaves and ultrastructure of the photosynthetic cells of 18 Cyperus and five Fimbristylis species with Kranz anatomy have been examined and described. The Kranz cells are all centripetal to the mestome sheath, and their ultrastructure conforms to the pattern previously reported in NADP-ME-type species, which are characterized by high NADP malic enzyme activity and form one of three subgroups of C4 pathway species based on differing C4 acid decarboxylating systems. In some Cyperus species the peripheral reticulum is arranged in radial bands of regular vesicles in denser staining stroma, alternating with radial bands showing less regular organization and staining less deeply; Fimbristylis never shows this arrangement.