外源H2O2对枳生长和根系碳水化合物含量的影响

Effects of Exogenous Hydrogen Peroxide on Growth and Root Carbohydrate Contents of Trifoliate Orange Seedlings

以盆栽枳实生幼苗为试材,采用不同浓度（0~1.25μmol/L）过氧化氢（H_2O_2）进行灌根处理,12周后观测株高、叶片数、根系形态、侧根数量及根系葡萄糖、果糖和蔗糖含量。结果表明,与清水对照相比,只有外源0.25μmol/L H_2O_2显著提高了株高和叶片数,0.05和0.25μmol/L H_2O_2显著提高了根系鲜重,0.05、0.25和1.25μmol/L H_2O_2均显著提高了根系干重、一级侧根数、二级侧根数、三级侧根数、根系果糖含量和根系葡萄糖含量。其中,0.25μmol/L H_2O_2促进枳生长的效果最好。