双酚A对番茄和生菜幼苗叶绿素荧光参数的影响  

Effects of Bisphenol A on Chlorophyll Fluorescence Parameters in Tomato and Lettuce

作　　者：李曼[1] 王丽红[1] 周青[1] 

机构地区：[1]江南大学环境与土木工程学院,江苏无锡214122

出　　处：《农业环境科学学报》2014年第6期1089-1094,共6页Journal of Agro-Environment Science

基　　金：江苏省普通高校研究生科研创新基金(CXLX13_749);科技部十二五水体污染与治理科技重大专项(2012ZX07101-013)

摘　　要：利用叶绿素荧光测定技术,研究了BPA对番茄和生菜幼苗叶绿素荧光反应的影响。结果表明,1.5 mg·L-1和3.0mg·L-1BPA处理降低番茄和生菜初始荧光(F0),增加最大光化学量子产量(Fv/Fm)、实际光化学量子产量(ΦPSⅡ)、表观电子传递速率(ETR)、光化学猝灭(qP)和非光化学猝灭(qN);BPA作用解除后,各指标均有所恢复,即1.5 mg·L-1和3.0 mg·L-1BPA可通过增加光能的吸收、改善PSⅡ系统、提高电子传递和光能转化效率、释放过量能量来增强光合作用,该作用随BPA解除而恢复。6.0mg·L-1BPA处理的番茄幼苗各荧光参数无显著变化,生菜幼苗F0和qN显著升高,可恢复到对照水平,表明6.0 mg·L-1BPA已使生菜幼苗发生光抑制,BPA解除后可恢复至正常水平。除10 mg·L-1BPA增加番茄qN外,10 mg·L-1和17.2 mg·L-1BPA增加2种作物F0而抑制其他各荧光参数,恢复期时各荧光参数向对照组靠近,即高剂量BPA引起作物光抑制、PSⅡ中心受损、光能转化和电子传递效率降低。BPA解除后各项指标可恢复,但恢复程度随BPA处理剂量增加而降低。对比2种作物荧光参数变幅可知,BPA对生菜各荧光参数影响大于番茄,恢复期番茄幼苗各荧光参数恢复程度大于生菜。总之,BPA对2种作物叶绿素荧光反应的影响方式和影响效果上存在差异,且BPA作用解除后,叶绿素荧光反应有不同程度恢复,仅6.0mg·L-1BPA作用解除后能恢复至对照水平。Bisphenol A（BPA）, an endocrine disruptor, has showed obvious toxic effects on life system. However, little information is avail-able regarding the toxic effects of BPA on crops. A hydroponic experiment was carried out to investigate the effects of BPA on chlorophyll fluorescence in tomato（Solanum lycopersicum）and lettuce（Lactuca sativa）seedlings. Treatments with 1.5 mg·L-1 and 3.0 mg·L-1 BPA de-creased the F0, but increased the Fv/Fm,ΦPSⅡ, ETR, qP and qN in tomato and lettuce seedlings. Supplying 6.0 mg·L-1 BPA did not change the fluorescence parameters in tomato seedlings, whereas it increased the F0 and qN in lettuce seedlings. At 10 mg·L-1 and 17.2 mg·L-1 BPA, the F0 was increased, but other fluorescence parameters were inhibited in tomato and lettuce seedlings, except increased qN in tomato seedlings at 10 mg·L-1 BPA. All fluorescence parameters could be restored when BPA was removed. However, the recovery decreased with increasing concentrations of BPA. Greater effects on the fluorescence parameters were observed in lettuce than in tomato seedlings, while the recovery was faster in tomato seedlings than lettuce seedlings. In conclusion, the effects of BPA on the chlorophyll fluorescence parameters are different in different crops. Chlorophyll fluorescence could resume to various degrees when BPA stress is removed.

关 键 词：双酚A 番茄 生菜 叶绿素荧光 

分 类 号：X503.231[环境科学与工程—环境工程]