摘要： 为给草地早熟禾及其空间诱变矮化突变体的生理、抗性及分子研究提供基础,对草地早熟禾野生型及矮化变异株系叶片的外观形态、表面组织结构进行了观察和测量.结果表明,2个矮化突变株系叶片均明显增宽、厚度减小;上表皮细胞的长宽比明显减少;同时,矮化突变株系的叶片气孔密度增大,单个气孔面积减小.进一步分析表明,矮化株系叶片宽度增加可能是因为细胞数目的增加和表皮细胞的增宽.旨为进一步研究其生理生化特性提供科学依据.

关键词: 草地早熟禾, 矮化突变体, 外观形态, 叶片组织结构

Abstract: To provide the foundation for the research about the molecules,physiology and resistance of Kentucky bluegrass and its dwarf mutant by space mutagenesis,leaf blades were investigated and measured under electronic microscope and for morphological and anatomy characteristics.Results showed that the two dwarf mutant,which had wider and thinner leaf blades,all had more epidermal cells and smaller length-width ratio of up-epidermal cells compared to the control.The further correlation analysis showed that the increase of cell number and broadening of epidermal cells might be the reason of the wider leaf in the dwarf strains.In addition,the stoma size and distribution of the dwarf mutants also were different from the control.Compared to WT,the stoma density in dwarf plants was increased,but the stoma size was decreased,which was beneficial to the water transpiration diffusion.The study would provide a scientific basis for further research on the physiological and biological characteristic of these materials.

Key words: Kentucky bluegrass, Dwarf mutants, Morphological appearance, Leaf tissue structure

中图分类号: 

• S688.01