钾对不同钾效率棉花基因型叶片解剖结构的影响

以钾高效高潜基因型HG103和低效低潜基因型LG122为材料，在盆栽条件下研究了钾对不同棉花基因型叶片解剖结构的影响。结果显示:花铃期施钾条件下HG103上部叶主叶脉的上、下表皮细胞排列较LG122紧密和整齐，而下部叶片则相反；缺钾后HG103上部叶主叶脉比LG122发育得好；HG103叶脉维管束木质部具有较多导管数，利于养分和水分等的运输，而LG122木质部导管数相对较少；HG103上部叶叶脉的韧皮部比LG122较为发达，利于光合产物运输。花铃期施钾条件下HG103上部叶的叶肉细胞结构与LG122差别不大，下部叶的栅栏组织则没有LG122排列的整齐。缺钾时，HG103上部叶叶肉的上表皮细胞比LG122排列的较为整齐，栅栏组织和海绵组织形状较规则；而下部叶LG122栅栏组织和海绵组织比HG103分化得好。

Effects of potassium fertilization on leaf anatomical structures of different cotton genotypes

To study the effects of potassium(K) on leaf anatomical structures of different cotton genotypes,a pot experiment was conducted at Huazhong Agricultural University.There were two cotton genotypes(HG103,and LG122),two K application levels(0 and 0.4 g/kg soil).The HG103(high K efficiency genotype) and LG122(low K efficiency genotype) were selected from 86 cotton cultivars(Gossypium hirsutum L.).The results show that the upper leaves main veins of the upper or the lower epidermis cells of HG103 are more tight ...