The Malan loess is rich in quartz. The characteristics of its erystal lattice are beneficial to dating of the formation age of Malan loess by using the TL technique. However, in doing so, abundant experimental facts m...The Malan loess is rich in quartz. The characteristics of its erystal lattice are beneficial to dating of the formation age of Malan loess by using the TL technique. However, in doing so, abundant experimental facts must be possessed and a theoretical basis established.展开更多
Effects of Pb\+\{2+\} on the growth of mung bean ( Phaseolus radiatus L.) see dlings were conducted wit h an experiment. The results showed that the dry weight of roots increased by 13 . 01%, the dry weight of shoots ...Effects of Pb\+\{2+\} on the growth of mung bean ( Phaseolus radiatus L.) see dlings were conducted wit h an experiment. The results showed that the dry weight of roots increased by 13 . 01%, the dry weight of shoots decreased by 12.80%, the free proline and MDA cont ent in leaves increased specially by 2.07% and 5.82%, the activity of POD decrea sed by 37.32% compared to control under 0.05 mmol/L Pb\+\{2+\} treatment. Under 0.5 mmol/ L Pb\+\{2+\} treatment, the dry weights of roots and shoots decreased specially by 14. 45% and 29.36%, the free proline and MDA content in leaves increased specially b y 43.55% and 28.50%, the activity of POD decreased by 59.37% compared to control . The results indicated that Pb\+\{2+\} interfered the growth of mung bean seedl ings by destroying cell membrane intergrity and decreasing the activity of POD in leaves .展开更多
文摘The Malan loess is rich in quartz. The characteristics of its erystal lattice are beneficial to dating of the formation age of Malan loess by using the TL technique. However, in doing so, abundant experimental facts must be possessed and a theoretical basis established.
文摘Effects of Pb\+\{2+\} on the growth of mung bean ( Phaseolus radiatus L.) see dlings were conducted wit h an experiment. The results showed that the dry weight of roots increased by 13 . 01%, the dry weight of shoots decreased by 12.80%, the free proline and MDA cont ent in leaves increased specially by 2.07% and 5.82%, the activity of POD decrea sed by 37.32% compared to control under 0.05 mmol/L Pb\+\{2+\} treatment. Under 0.5 mmol/ L Pb\+\{2+\} treatment, the dry weights of roots and shoots decreased specially by 14. 45% and 29.36%, the free proline and MDA content in leaves increased specially b y 43.55% and 28.50%, the activity of POD decreased by 59.37% compared to control . The results indicated that Pb\+\{2+\} interfered the growth of mung bean seedl ings by destroying cell membrane intergrity and decreasing the activity of POD in leaves .
