nacl胁迫对3种荒漠植物幼苗叶绿素荧光参数的影响.pdf

西北植物学报,2008,28(9):1843-1849
ActaBot.Boreal.Occident.Sin.

文章编号:10004025(2008)09184307*

NaCl胁迫对3种荒漠植物幼苗
叶绿素荧光参数的影响

韩张雄1,2,李利1*,徐新文1,吕湘芳3

(1中国科学院新疆生态与地理研究所,乌鲁木齐830011;2中国科学院研究生院,北京100049;3新疆农业大学,乌鲁木齐
830052)

摘要:以生长在荒漠地区的典型盐生植物囊果碱蓬(SuaedaphysophoraPall.)、旱生植物梭梭[Haloxylonam
modendron(C.A.Mey.)Bunge]和超旱生植物白梭梭(HaloxylonpersicumBungeexBoiss.etBuhsee)的幼苗为实
验材料,研究了它们在不同NaCl浓度处理下的叶绿素荧光参数变化特征.结果表明:在NaCl胁迫下,同期囊果碱
蓬的PS潜在活性(Fv/Fo)和最大光化学量子产量(Fv/Fm)降低幅度较小,而梭梭和白梭梭则有较明显降低,而
且囊果碱蓬显著高于后两者;同期光合量子产量(Yield)和表观光合电子传递速率(ETR)均以囊果碱蓬最大并显著
高于其余2种植物,而梭梭与白梭梭之间无显著差异.囊果碱蓬和梭梭的Yield和ETR并不随NaCl浓度的增加而
降低;同一植物的荧光参数在各浓度盐处理间无显著差异.在本实验条件下,NaCl胁迫并未使囊果碱蓬的PS受
到明显损伤,其仍能够较正常地吸收光能进行光合作用,对盐分胁迫有较强的忍耐能力;适度的盐渍对囊果碱蓬和
梭梭幼苗的生长是有益的;盐胁迫效应主要表现为种间差异,而非处理间差异;叶绿素荧光技术可以有效应用于耐
盐植物筛选.
关键词:幼苗;盐分胁迫;叶绿素荧光;囊果碱蓬;梭梭;白梭梭
中图分类号:Q945.78文献标识码:A

CharacteristicsofChlorophyllFluorescenceParameters
inThreeDesertPlantsunderNaClStress

HANZhangxiong1,2,LILi1*,XUXinwen1,LXiangfang3
(1XinjiangInstituteofEcologyandGeography,ChineseAcademyofSciences,Urumqi830011,China;2GraduateSchool,Chinese
AcademyofSciences,Beijing100049,China;3XinjiangAgricultureUniversityUrumqi830052,China)

Abstract:TheeffectsofNaClonchlorophyllfluorescenceparametersofthreedesertplantspecies,Suaeda
physophoraPall.,Haloxylonammodendron(C.A.Mey.)BungeandHaloxylonpersicumBungeexBoiss.
etBuhsee,whichdistributedinNorthwesternChina,wereinvestigated.Theresultsshowedthatthevalue
ofFv/Fo,Fv/FmreducedquiteslightlyinS.physophorabutquiteobviouslyinH.ammodendronandH.
persicum.Themaximumvalueofyield,ETRwereallobservedinS.physophora,whilethedifferencesbe
tweentheothertwospecieswerenotsignificant.ItexplainedthatPSofS.physophorawasnotde
stroyedobviouslyunderNaClstress.Itstillcouldabsorbenergyoflightandcarryonthephotosynthesis.
Moreover,itisnotsignificantlydifferentinthedifferentcontrolsonFv/Fo,Fv/Fm,etc.Itsuggestedthat:
S.physophoraseemedtobemoretoleranttosalinitystressthanothertwospecies.Itcouldbeplantedin
highsalinealkaliareas.ThedifferencesofNaClstressissignificantl