镉和温度预暴露对小麦吸收镉的影响Uptake of Cadmium by Wheat(Triticum aestivum) as Affected by Pre-Exposure to Cadmium and Temperature
李丹丹;周东美;汪鹏;李连祯;翁南燕;
摘要(Abstract)：
土壤中重金属Cd污染是一个累积过程,污染历史会影响植物对土壤中Cd的吸收.近年来,随着全球气候的变暖,温度对Cd的生物有效性的影响日益引起关注.通过模拟土壤溶液,研究了Cd的浓度、温度和预暴露时间对小麦吸收Cd的影响.小麦在浓度为0.01和0.1μmol·L-1的Cd中经过不同时间的预暴露后进行6h的短期吸收实验.结果发现,经1d预暴露后,小麦根部吸收Cd的量有增加趋势,这说明Cd对小麦产生了刺激作用,小麦地上部分的含Cd量也有所增加但不显著.经5d预暴露后,小麦对Cd产生了抗性,这使得小麦根部降低了对Cd的吸收量;并且当Cd为0.1μmol·L-1时,根部Cd吸收量的降低最为明显;由于Cd从根部向地上部迁移是一个复杂的生理过程,预暴露对地上部分Cd含量的影响没有根具有规律性;经过37℃高温胁迫4h后,小麦根部及地上部分的Cd含量减少高达40%;预暴露和高温共同作用后,其减少量更多,这说明预暴露和高温共同作用能够减少小麦对Cd的吸收量.
关键词(KeyWords)： 镉;生物有效性;预暴露;温度
基金项目(Foundation): 国家重点基础研究发展规划项目(No.2007CB936604)
作者(Author): 李丹丹;周东美;汪鹏;李连祯;翁南燕;
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DOI:
参考文献(References)：
- Baker A J M.1987.Metal tolerance[J].New Phytologist,106(s1):93-111
- Beard J B.1973.Turfgrass:Science and Culture[M].EnglewoodCliffs,NJ:Prentice-Hall
- Bradley R W,Sprague J B.1985.Accumulation of zinc byrainbow trout as influenced by pH,water hardness and fish size[J].Environmental Toxicology and Chemistry,4(5):685-694
- Chao Y Y,Hsu Y T,Kao C H.2008.Involvement ofglutathione in heat shock-and hydrogen peroxide-induced cadmiumtolerance of rice(Oryza sativa L.)seedlings[J].Plant and Soil,318(1-2):37-45
- Chen H M.1996.Heavy Metal Pollution in Soil-Plant System[M].Beijing:Science Press,71-125(in Chinese)
- Chen S L,Kao C H.1995.Prior temperature exposure affectssubsequent Cd-induced ethylene production in rice leaves[J].Plant Science,104(2):135-138
- DeGrave G M,Ward R W.1977.Acclimation of fatheadminnows and lake trout to residual chlorine and bromine chloride[J].Journal-Water Pollution Control Federation,49(10):2172-2178
- Dixon D G,Sprague J B.1981a.Acclimation to copper byrainbow trout(Salmo gairdneri)—A modifying factor in toxicity[J].Canadian Journal of Fisheries and Aquatic Sciences,38(8):880-888
- Dixon D G,Sprague J B.1981b.Acclimation-induced changesin the toxicity of arsenic and cyanide to rainbow trout,Salmogairdneri Richardson[J].Journal of Fish Biology,18(5):579-589
- Duncan D A,Klaverkamp J F.1983.Tolerance and resistance tocadmium in white suckers(Catostomus commersoni)previouslyexposed to cadmium,mercury,zinc or selenium[J].CanadianJournal of Fisheries and Aquatic Sciences,40(2):128-138
- Guan R,Wang W X.2004.Cd and Zn uptake kinetics inDaphnia magna in elation to Cd exposure history[J].EnvironmentalScience&Technology,38(22):6051-6058
- Hall A,Fielding A H,Butler M.1979.Mechanisms of coppertolerance in the marine fouling alga Ectocarpus siliculosus—Evidence for an exclusion mechanism[J].Marine Biology,54(3):195-199
- Hart J J,Welch R M,Norvell W A,Sullivan L A,Kochian LV.1998.Characterization of cadmium binding,uptake,andtranslocation in intact seedlings of bread and durum wheatcultivars[J].Plant Physiology,116(4):1413-1420
- Hobson J F,Birge W J.1989.Acclimation-induced changes intoxicity and induction of metallothionein-like proteins in thefathead minnow following sublethal exposure to zinc[J].Environmental Toxicology&Chemistry,8(2):157-169
- Hsu Y T,Kao C H.2007.Heat shock-mediated H2O2accumulationand protection against Cd toxicity in rice seedlings[J].Plant andSoil,300(1-2):137-147
- Janssens I A,Lankreijer H,Matteucci G,Kowalski A S,Buchmann N,Epron D,Pilegaard K,Kutsch W,Longdoz B,Grünwald T,Montagnani L,Dore S,Rebmann C,Moors E J,Grelle A,Rannik,Morgenstern K,Oltchev S,Clement R,Guemundsson J,Minerbi S,Berbigier P,Ibrom A,Moncrieff J,Aubinet M,Bernhofer C,Jensen N O,Vesala T,Granier A,Schulze E D,Lindroth A,Dolman A J,Jarvis P G,Ceulemans
- R,Valentini R.2001.Productivity overshadows temperature indetermining soil and ecosystem respiration across European forests[J].Global Change Biology,7(3):269-278
- Loveys B R,Scheurwater I,Pons T L,Fitter A H,Atkin O K.2002.Growth temperature influences the underlying componentsof relative growth rate:an investigation using inherently fast-andslow-growing plant species[J].Plant,Cell&Environment,25(8):975-987
- Mattson M P.2008.Hormesis defined[J].Ageing ResearchReviews,7(1):1-7
- Neumann D,Lichtenberger O,Günther D,Tschiersch K,NoverL.1994.Heat-shock proteins induce heavy-metal tolerance inhigher plants[J].Planta,194(3):360-367
- Plette A C C,Nederlof M M,Temminghoff E J M,VanRiemsdijk W H.1999.Bioavailability of heavy metals interrestrial and aquatic systems:A quantitative approach[J].Environmental Toxicology and Chemistry,18(9):1882-1890
- Rachmilevitch S,Lambers H,Huang B R.2006.Root respiratorycharacteristics associated with plant adaptation to high soiltemperature for geothermal and turf-type Agrostis species[J].Journal of Experimental Botany,57(3):623-631
- Rachmilevitch S,Lambers H,Huang B.2008.Short-term andlong-term root respiratory acclimation to elevated temperaturesassociated with root thermotolerance for two Agrostis grass species[J].Journal of Experimental Botany,59(14):3803-3809
- Salt D E,Wagner G J.1993.Cadmium transport across tonoplastof vesicles from oat roots[J].The Journal of BiologicalChemistry,268(17):12297-12302.
- Sellin M K,Tate-Boldt E,Kolok A S.2005.Acclimation to Cuin fathead minnows:Does age influence the response?[J].Aquatic Toxicology,74(2):97-109
- Stubblefield W A,Steandan B L,La Point T W,Bergman H L.1999.Acclimation-induced changes in the toxicity of zinc andcadmium to rainbow trout[J].Environmental Toxicology andChemistry,18(12):2875-2881
- Stuhlbacher A,Bradley M C,Naylor C,Calow P.1992.Induction of cadmium tolerance in two clones of Daphnia magnastraus[J].Comparative Biochemistry and Physiology Part C:Comparative Pharmacology,101(3):571-577
- Van Leeuwen H P,Town R M,Buffle J,Cleven R F M J,Davison W,Puy J,Van Riemsdijk W H,Sigg L.2005.Dynamic speciation analysis and bioavailability of metals inaquatic systems[J].Environmental Science&Technology,39(22):8545-8556
- Van Leeuwen H P,Koester W.2004.Chapter10:CriticalEvaluation of Physico-chemical Parameters and Processes forModeling the Biological Uptake of Trace Elements inEnvironmental(Aquatic)Systems[M].New York,NY,USA:John Wiley,445-533
- Xie L,Klerks P L.2004.Changes in cadmium accumulation asa mechanism for cadmium resistance in the least killifishheterandria Formosa[J].Aquatic Toxicology,66(1):73-81
- 陈怀满,郑春荣,周东美,王慎强.2004.关于我国土壤环境保护研究中一些值得关注的问题[J].农业环境科学学报,23(6):124-1245
- 陈怀满.1996.土壤-植物系统中的重金属污染[M].北京:科学出版社,71-125
- 夏汉平.1997.土壤-植物系统中的镉研究进展[J].应用与环境生物学报,3(3):289-298