毛竹实生苗不同代分蘖茎秆的解剖结构比较

研究毛竹实生苗不同代分蘖苗不同部位茎秆的解剖结构,试图更全面地了解竹类植物茎秆解剖结构的变化规律,丰富竹类植物茎秆解剖结构。结果表明,各代分蘖苗的表皮微形态并无明显差别;秆中、下部组织比量以及秆基本形态指标(秆壁厚、直径、筒腔径、筒壁腔比)的变化随分蘖代数有明显规律性,且在同一分蘖苗不同部位秆中,也有明显规律性:秆内层和外层维管束差异较大秆内层维管束有明显变化规律,秆外层变化规律不明显。表明竹类植物幼态和成熟态中维管束形态不完全一致;髓环细胞功能可能与贮藏有关,且其石化程度可能与竹类植物年龄有关;另外某些分蘖苗秆上部结构与节部解剖结构相近。This study examines the anatomical structure of stems at different positions of tiller seedlings at various generations derived from moso bamboo (Phyllostachys edulis) seedlings, with the goal of gaining a more comprehensive understanding of the variation rules governing bamboo stem anatomical structure and enriching the existing research on bamboo stem anatomy. The results demonstrate that there are no significant differences in the epidermal micromorphology of tiller seedlings across different generations. The changes in tissue proportion in the middle and lower segments of the stems, as well as the core morphological indicators of stems (including stem wall thickness, stem diameter, pith cavity diameter, and the ratio of stem wall thickness to pith cavity diameter), follow distinct regularity along with tiller generations, and also exhibit clear regularity in stems at different positions of the same tiller seedling: the vascular bundles in the inner and outer stem layers differ considerably. Specifically, the vascular bundles in the inner stem layer show obvious variation patterns, while those in the outer layer do not have discernible regularity. This finding indicates that the morphology of vascular bundles in juvenile and mature bamboo plants is not fully consistent. The function of pith ring cells may be associated with storage, and their lignification degree may be correlated with the age of bamboo plants. Additionally, the upper stem structure of some tiller seedlings is similar to the anatomical structure of stem nodes.