To study the effects of indole acetic acid (IAA) on the growth and selenium (Se) absorption of fruit tree, a pot experiment was conducted to study the effects of different concentrations involved in the spraying of 0 (the control), 30, 60, 90, and 120 mg/L IAA on the growth and Se uptake of C. betacea seedlings. The concentrations of 30, 60, and 90 mg/L IAA increased the various organs’ biomass and net photosynthetic rate of C. betacea seedlings compared to the control, while the concentration of 120 mg/L IAA had no significant effect on that. Only the concentration of 60 mg/L IAA increased the chlorophyll (chlorophyll a, chlorophyll b, total chlorophyll) contents in C. betacea seedlings compared to the control. The concentrations of 30, 60, and 90 mg/L IAA also increased the antioxidant enzymes’ (superoxide dismutase, peroxidase, and catalase) activities and soluble protein content of C. betacea seedlings compared to the control. For Se content, compared to the control, the concentrations of 60 and 90 mg/L IAA increased the Se contents in roots, stems, leaves, and shoots of C. betacea seedlings, and also enhanced the Se bioconcentration factor. Therefore, spraying IAA with the appropriate concentration (60–90 mg/L) could promote the C. betacea seedlings’ growth and Se absorption, and the best concentration was 60 mg/L IAA.

为了研究吲哚乙酸（IAA）对果树生长和硒（Se）吸收的影响，进行了盆栽实验，研究了0（对照），30、60喷施不同浓度的影响，90和120 mg / L IAA对甜菜梭菌幼苗的生长和硒吸收的影响。与对照相比，IAA浓度分别为30、60和90 mg / L时，增加了角锥菜幼苗各器官的生物量和净光合速​​率，而IAA浓度为120 mg / L时，对对照无明显影响。只有浓度为60 mg / L的IAA才增加了C. betacea中叶绿素（叶绿素a，叶绿素b，总叶绿素）的含量幼苗与对照相比。与对照相比，IAA浓度为30、60和90 mg / L时，也增加了角锥果幼苗的抗氧化酶（超氧化物歧化酶，过氧化物酶和过氧化氢酶）活性和可溶性蛋白质含量。对于硒含量，与对照相比，IAA浓度为60和90 mg / L时，增加了角锥菜幼苗根，茎，叶和芽中的硒含量，并提高了硒的生物富集因子。因此，以适当的浓度（60–90 mg / L）喷洒IAA可以促进甜菜梭菌幼苗的生长和Se的吸收，最佳浓度为60 mg / L IAA。