核农学报2017，Vol.31Issue(8)：1633-1639,7.DOI:10.11869/j.issn.100-8551.2017.08.1633
锑胁迫对玉米生物量、光合特性及锑积累的影响
Effects of Antimony Stress on the Biomass, Photosynthetic Characteristics and Antimony Accumulation of Maize
摘要
Abstract
In order to investigate effects of antimony (Sb pollution on the growth and photosynthesis of economic cropmaize,the effects of different Sb concentrations [0(CK,50,250,500 and 1 000 mg·kg-1] on the biomass,gas exchange parameters,chlorophyll fluorescence and antimony accumulation of maize plants (cv.Huayu 14) were investigated in a pot experiment.The biomass,chlorophyll content,gas exchange parameters (net photosynthetic rate,stomatal conductance and transpiration rate) and the maximum quantum yield of PS Ⅱ (Fv/Fm) all exhibited a decreasing trend with an increasing Sb level in the growth medium whereas instantaneous water use efficiency (iWUE) and malondialdehyde (MDA) content displayed an opposite tendency.At a high concentration of Sb (1000 mg·kg-1),maize biomass,total chlorophyll content,net photosynthetic rate and Fv/Fm,decreased by 47.90％,34.22％,52.70％ and 7.84％ as compared with CK,respectively;iWUE and MDA content increased by 66.71％ and 34.02％ as compared with CK,respectively.Besides,with increasing Sb level,the Sb content was increased in the underground part and aboveground part of maize,and the differences among Sb treatments were significant (P ＜ 0.05).The translocation coefficient from underground part to aboveground part also exhibited an increasing trend and its values (between 0.52 and 0.82) were lower than 1.0,indicating that a relatively small amount of Sb could be transferred from underground part to aboveground part,which may help this maize variety to protect its photosynthetic apparatus and enhance its tolerance to heavy-metal tolerance.This study provides some useful information based on the economic crop,maize,that can be applied to the remediation of heavy metal contaminated soils.关键词
锑/玉米/光合作用/生物量/叶绿素荧光Key words
antimony/maize/photosynthesis/biomass/chlorophyll fluorescence引用本文复制引用
张强,刘飞,纪磊,姚辉,马幼菲,张晓雅..锑胁迫对玉米生物量、光合特性及锑积累的影响[J].核农学报,2017,31(8):1633-1639,7.基金项目
国家自然科学基金(41371444),安徽省教育厅重点项目(KJ2014A227),省级大学生创新训练计划(AH201410373055) （41371444）
