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以1年生盆栽刺槐幼苗为试材,采用温室控制,研究0、0.5、1、2 mmol/L铝胁迫对刺槐幼苗光合色素和矿质元素含量的影响,结果表明,0.5、1、2 mmol/L 3种铝浓度胁迫的刺槐幼苗,叶绿素a、叶绿素b、总叶绿素和类胡萝卜素含量均显著增加,且随着铝浓度增大而增加,叶绿素a/b显著降低,且随着铝浓度增大而减小,刺槐幼苗根、茎中铝元素含量均显著高于未胁迫处理的;2 mmol/L铝浓度胁迫的刺槐幼苗根、茎、叶,其碳元素含量均显著低于未胁迫处理的,而1 mmol/L铝处理仅叶片中碳元素含量显著低于未胁迫处理的;除0.5、1 mmol/L铝处理下的刺槐幼苗根氮元素含量没有显著变化外,3种铝浓度胁迫处理的刺槐根、茎、叶氮元素含量均显著低于未胁迫处理的;与未胁迫处理相比,0.5 mmol/L铝胁迫处理的刺槐幼苗叶片碳氮比和0.5、1 mmol/L铝胁迫处理的刺槐幼苗茎碳氮比均显著增加。刺槐能够忍耐较低的铝浓度胁迫,并能在高浓度胁迫下累积铝,可通过栽植刺槐对一些铝污染地区进行植物修复。
The effects of 0, 0.5, 1, 2 mmol / L aluminum on photosynthetic pigments and mineral elements in seedlings of Robinia Pseudoacacia were studied. The results showed that 0.5,1,2 mmol / L The contents of chlorophyll a, chlorophyll b, total chlorophyll and carotenoid of three locust seedlings under aluminum stress increased significantly, and increased with the increase of aluminum concentration, chlorophyll a / b decreased significantly. With the increase of aluminum concentration While the contents of aluminum in roots and stems of R. pseudoacacia seedlings were significantly higher than those of non-stressed ones. The roots, stems and leaves of R. pseudoacacia seedlings under 2 mmol / L aluminum stress were significantly lower than those of untreated , While the content of carbon in leaf of 1 mmol / L aluminum treatment was significantly lower than that of non-stress treatment. Except for 0.5 and 1 mmol / L aluminum, the contents of nitrogen in root of A. pseudoacacia seedlings did not change significantly. The contents of nitrogen and nitrogen in roots, stems and leaves of Robinia pseudoacacia were significantly lower than those of untreated ones. Compared with the untreated ones, the leaf carbon and nitrogen ratio of 0.5 mmol / L aluminum stress treatment and 0.5 and 1 mmol / L aluminum stress treatments Of black locust seedlings significantly increased the ratio of carbon to nitrogen. Robinia pseudoacacia can tolerate lower concentrations of aluminum stress and can accumulate aluminum under high concentrations of stress. Phytoremediation can be used to plant phytoliths in some areas contaminated by aluminum.