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 effects of AMF inoculation on growth indicators,root morphology,xylem sap Cd concentration,and root Cd ion flow velocity in different 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 significantly increased the dry weight of pepper roots,with'Layan 101'and'Layan 201'increasing by 99.71%and 82.61%,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 significantly increased.The concentration of Cd in the wound fluid 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 flow velocity of Cd2+in the root systems also decreased significantly,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 effect observed on the Cd high accumulation variety'Layan 101'compared to the Cd low accumulation variety'Layan 201'.
维普
万方数据
