关键词: 关键词：丛枝菌根真菌, 辣椒, 品种, 镉, 固持

Abstract: Abstract：Arbuscular mycorrhizal fungi（AMF）can enhance the host plant’s tolerance to cadmium （Cd）．However，the impact of AMF on Cd uptake in crops with different Cd accumulation types is still unclear．Under Cd stress，the sand culture method was used to study the eff ects of AMF inoculation on growth indicators，root morphology，xylem sap Cd concentration，and root Cd ion fl ow velocity in diff erent varieties of peppers．Two inoculation levels，inoculation（Fm）and non-inoculation（CK）were applied to high Cd accumulation pepper variety‘Layan 101’and low Cd accumulation pepper variety‘Layan 201’．The results showed that，under Cd stress，AMF promoted the growth of peppers．Compared with CK，AMF signifi cantly increased the dry weight of pepper roots，with‘Layan 101’and‘Layan 201’increasing by 99.71% and82.61%，respectively．The above ground dry weight of‘Layan 201’and the total root length，root surface area，root volume，and average root diameter of‘Layan 101’all signifi cantly increased．The concentration of Cd in the wound fl uid of the two pepper varieties was found to decrease，with the greatest reduction observed at 30 days．Cd concentrations in‘Layan 101’and‘Layan 201’decreased by 32.12% and 45.83%，respectively．The average fl ow velocity of Cd2+ in the root systems also decreased signifi cantly，with a greater reduction observed in‘Layan 101’（81.8%）compared to‘Layan 201’（77.2%）．The absorption of Cd by the root systems of the two pepper varieties was inhibited by AMF，with a stronger inhibitory eff ect observed on the Cd high accumulation variety‘Layan 101’compared to the Cd low accumulation variety‘Layan 201’．

Key words: Keywords：arbuscular mycorrhizal fungi, peppers, variety, cadmium, fi xation