Effects of humic acid nutrient solution on physio-biochemistry character-istic and heavy metal accumulation of Sauropus androgynus seedlings un-der cadmium stress
FAN Qiong
JIU Yuanda
YE Haihui
FENG Jian
ZOU Dongmei
SU Chulian
ZHAO Min
Abstract：In order to investigate the effects of humic acid nutrient solution on physio-biochemistry and heavy metal con-tent of Sauropus androgynus seedlings under cadmium(Cd)stress,pot experiments with humic acid nutrient solution(AF)treatment and without humic acid nutrient solution(CK)treatment were conducted under different soil Cd concentrations(0,15,25,and 45 mg·kg-1).The results showed that the application of AF can effectively improve the total biomass,leaf area and leaf number of Sauropus androgynus.At Cd45 the AF application promoted the accumulation of Cd in leaves and roots and Zn in leaves of S.androgynus,which increased by 134.7％,39.0％and 36.9％,respectively.MDA content in leaves and roots increased by 7.0％and 19.6％,respectively.The AF treatment can effectively increase the activity of anti-oxidant enzymes.Under no Cd,the POD enzyme activity in roots and leaves and SOD enzyme activity in leaves of S.an-drogynus treated with AF application were 187.6％,35.1％and 20.6％higher than those treated with CK,respectively.And the CAT and SOD enzyme activity in roots increased with the concentration of Cd.Therefore,AF promoted the Cd accumulation of S.androgynus under high Cd stress,but the growth of S.androgynus were not affected,mainly because the protection system of antioxidant enzymes mitigated the damage of lipid membrane peroxidation and increased the Cd tolerance of S.androgynus.
Keywords：S.androgynusHumic acid nutrient solutionCadmium stressPhysio-biochemistry characteristic
Publication Date：2023-12-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 120-128 )