稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
1期
78-89
,共12页
王建荣%王蕾%胡婷%李文超%薛绍武
王建榮%王蕾%鬍婷%李文超%薛紹武
왕건영%왕뢰%호정%리문초%설소무
lanthanum%abscisic acid%reactive oxygen species%Arabidopsis%rare earths
Rare earth elements (REEs) were reported to have adverse biology effects on plant growth and production. However, whether REEs are involved in plant hormone abscisic acid signal is not clear. Here we reported that REE lanthanum (La) interacted with abscisic acid (ABA) in the regulation of seed germination and root growth in model plant Arabidopsis. La3+at a concentration of 10 μmol/L alleviated ABA depression of seed germination and reversed ABA inhibition of root elongation growth in Arabidopsis. Previous studies showed that ABA could promote root hair development. In the present study, La3+inhibited root hair development promoted by ABA. Moreover, La3+inhibited H2O2 generation induced by ABA in root cells. Therefore we inferred that La3+might interact with ABA upstream of H2O2 generation.
