【摘要】 以生长良好的紫穗槐播种幼苗为试验材料,设置5种不同浓度的多效唑处理(1、5、10、15、20 mg/L),测定不同浓度多效唑处理下幼苗生理特性指标参数,研究多效唑对紫穗槐幼苗生理特性的影响。结果表明,随着多效唑浓度的增加,紫穗槐幼苗叶片相对含水量不断提高,最高达到86.9%;可溶性糖含量呈现出先增加后降低而后又增加的趋势,最高达到35.43 mg/g;可溶性蛋白质含量呈现逐渐增加的趋势,最高达到173.25 mg/g;过氧化物酶活性是先增加后降低,最高达到472.18 U/(g·min);丙二醛含量则是逐渐降低,最低为15.93μmol。认为将多效唑作为一种植物生长延缓剂,通过叶面喷施可对植物形成逆境胁迫,但植物会通过调节细胞的渗透能力和抗氧化能力来缓解逆境胁迫带来的损伤。更多还原

【Abstract】 The parameters of physiological characteristics of Amorpha fruticosa seedlings treated with different concentrations of paclobutrazol(1、5、10、15、20 mg/L) were determined to study the effect of paclobutrazol on physiological characteristics of A. fruticosa seedlings. The results showed that the relative water content of A. fruticosa seedling leaves increased continuously with the increase of paclobutrazol concentration,reaching a maximum of 86.98%,that the soluble sugar content showed a trend of increasing first and then decreasing and then increasing again,reaching a maximum of 35.43 mg/g,that the soluble protein content showed a gradually increasing trend,reaching a maximum of 173.25 mg/g,that the peroxidase activity increased first and then decreased,reaching a maximum of 472.18 U/(g·min),that the malondialdehyde content gradually decreased with a minimum of 15.93 μmol/mg. It was concluded that paclobutrazol,as a plant growth retardant,was also an abiotic stress for plants which could mitigate the damage caused by abiotic stresses by regulating the cell′s permeability and antioxidant capacity.更多还原