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采用温室培养试验研究锑对地枇杷生理变化的影响。结果表明,当锑浓度高于30μmol/L时,地枇杷叶片的生长明显受到抑制,而地枇杷的根和茎在所有的锑浓度下都没有明显的变化,表明地枇杷的叶片比根和茎对锑的毒性更敏感,且在根中锑浓度要高于茎和叶中的。地枇杷通过增加超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性来减少锑胁迫产生的活性氧(ROS)水平,但在锑胁迫早期,SOD和CAT比POD的作用更明显。在锑胁迫早期,不同浓度的锑能够在一定程度上增加地枇杷叶绿素的含量,但在锑胁迫后期(实验结束时),叶绿素含量在高浓度锑(450μmol/L)胁迫下显著降低。在整个培养阶段中,地枇杷最大光量子产量和实际光量子产量值没有显著差异,表明地枇杷在锑浓度为450μmol/L以下时,光合作用未受明显抑制。地枇杷具有一定的锑耐受能力,可用于锑污染土壤修复。
Effect of Antimony on Physiological Changes of Loquat in Land Using Greenhouse Culture Test. The results showed that when the concentration of antimony was higher than 30μmol / L, the growth of loquat leaves was significantly inhibited, while the roots and stems of loquat did not show any significant changes at all antimony concentrations, indicating that the loquat leaves were more specific than roots and stems The toxicity of antimony is more sensitive, and the concentration of antimony in roots is higher than in stems and leaves. The loquat decreased the levels of reactive oxygen species (ROS) produced by antimony stress by increasing the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) The effect of CAT is more pronounced than POD. In the early stage of antimony stress, different concentrations of antimony could increase the content of chlorophyll in loquat to a certain extent, but in the late stage of antimony (at the end of experiment), the content of chlorophyll decreased significantly under high concentration of antimony (450μmol / L). During the whole cultivation stage, there was no significant difference between the maximum light quantum yield and the actual light quantum yield of Loquat, indicating that the photosynthesis of Loquat was not significantly inhibited when the antimony concentration was below 450μmol / L. To loquat has a certain degree of antimony tolerance, can be used for antimony contaminated soil repair.