摘  要：为研究废水中高浓度Pb对湿地植物光合特性的影响，通过水培实验研究了不同浓度(0、10、25、50、100、200、500mg/L)和处理时间(7、14、21、28 d)含Pb废水胁迫下对菖蒲的叶绿素和光合性能（净光合速率、蒸腾速率、气孔导度等）的影响，为了揭示高浓度的铅胁迫对菖蒲生理机制的影响。结果表明，与对照组相比，菖蒲叶绿素的浓度会受到 的影响，随着植株中 浓度的增多而逐渐减少。与此同时，当 浓度不变时，叶绿素浓度一会伴随时间的延长而逐渐降低。当Pb浓度达到25mol/L时能显著提高菖蒲的净光合速率、蒸腾速率、气孔导度，随后再逐渐减小。因此，高浓度含Pb废水胁迫下可以增加菖蒲叶绿素的含量，增强植株的光合作用，高浓度胁迫抑制植物生长。通过实验，对不同浓度 影响下的菖蒲生长发育状况进行了浅层探究，为后学深入探究 影响下的菖蒲生长发育状况奠定了必要的研究基础。39050
毕业论文关键词：菖蒲，Pb胁迫，光合特性
Influence of wastewater containing high concentrations of Pb on photosynthetic characteristics of calamus
Abstract：To study the effect of high concentrations ofPb-containing wastewater wetland plants grown by hydroponic experiments with different concentrations (0,10,25,50,100,200,500mg / L) and processing time (7,14,21,28 d) wastewater containing Pb Stress chlorophyll and photosynthesis under the influence of Iris performance (net photosynthetic rate, transpiration rate, stomatal conductance, etc.) on to reveal high concentrations of lead stress on physiological mechanism of iris functions. The results showed that, compared with control, iris plant chlorophyll content with increasing concentrations of Pb and Pb reduce stress, and with the extension of the same process the next time Pb chlorophyll content decreased. When the Pb concentration of 25mol / L can significantly improve plant iris net photosynthetic rate, transpiration rate, stomatal conductance, and subsequently decreases. Thus, high concentrations of wastewater containing Pb iris stress can increase chlorophyll content, enhance plant photosynthesis, high concentrations inhibited plant growth. Initially revealed the different concentrations of Pb stress on physiological and biochemical metabolism of Iris, in order to further explore the stress Pb and Pb Iris physiological and biochemical capabilities correlation between tolerance basis.
Key words：Calamus，Pb stress，photosynthetic characteristics
目录
1引言.1
 1.1课题研究的目的和意义.1
1.2国内外研究现状与相关发展趋势.1
   1.2.1我国重金属植物修复研究现状1
   1.2.2国外重金属植物修复研究现状与发展趋势2
1.3水生植物对水体中重金属污染的治理作用及运用.3
   1.3.1水生植物对重金属污染水体的净化作用3
   1.3.2水生植物对重金属的吸收、转运机制3
   1.3.3水生植物对重金属的积累机制3
   1.3.4水生植物对重金属的忍耐机制3
  1.4光合特性的影响因子.3
   1.4.1净光合速率3
   1.4.2蒸腾速率4
   1.4.3气孔导度4
2实验材料和方法.4
2.1材料.4
2.2实验仪器.4
2.3实验方法.4
   2.3.1叶片光合因子的测定5
   2.3.2叶绿素的测定5
   2.3.3废水溶液pH的测定.5
   2.3.4废水含铅量的测定5
   2.3.5菖蒲根茎叶含铅量的测定5
   2.3.6实验后样本液的提取与处理6
  2.4实验材料动态取样时间.6
  2.5数据分析.6
3结果与分析.7
3.1 Pb胁迫下菖蒲叶片叶绿素含量的变化7
3.2 Pb影响下菖蒲植株光合作用相关参数分析8 高浓度含Pb废水对菖蒲光合特性的影响:http://www.751com.cn/shengwu/lunwen_38156.html