模拟动物取食子叶对辽东栎种子萌发和幼苗早期生长的影响-闫兴富

*1＊＊1121175002127519001/4、1/23/4Quercuswutaishanica。1/41/4。1/41/23/4。、、、、、、21/23/4、1/21/23/41/4。*2013XQG01、20120530960087。＊＊[e-mail]2013-09-132013-12-06Q948．1A1000－489020144－0973－09EffectsofsimulatedcotyledonpredationontheseedgerminationandearlyseedlinggrowthofQuercuswutaishanica．YANXing-fu1＊＊FANGSu1SHIChun1QIUZhi-hu2ZHOUYun-feng11CollegeofBiologicalScienceandEngineeringBeifangUniversityofNationalitiesYinchuan750021China2AdministrationBureauofLuoshanNationalNatureＲeserveHongsibu751900NingxiaChina．ChineseJournalofEcology2014334973－981．AbstractUnderlaboratoryartificialclimateincubatorandinglassgreenhousetwoexperimentsofsimulatedcotyledonpredationwereconductedtotesttheeffectsofdifferentcotyledonexcisionexcisionof1/41/2and3/4cotyledonwithnonexcisioncotyledonascontrolonseedgermi-nationandearlyseedlinggrowthofQuercuswutaishanicaadominanttreespeciesinwarmtem-peratedeciduousforest．ThegerminationpercentagesGPsofseedsplantedintheartificialcli-mateincubatorwerehigherthanthatofthecontrolafterthecotyledonbeingpartiallyexcisedandasignificantdifferencewasdetectedbetweenthecontroland1/4cotyledonexcisiontreatments．CotyledonexcisionacceleratedthetimingofseedgerminationorinotherwordscotyledonremovalincreasedthecoefficientofgerminationrateCGＲbutnosignificantdifferenceinCGＲwasobservedamongthecontrolandcotyledonexcisiontreatments．Amongallcotyledonexcisiontreatmentsthe1/4cotyledonexcisiontreatmentsignificantlyincreasedthegerminationindexGIofseeds．ItwasfoundthatcotyledonexcisiondidnotsignificantlyaffectvigorindexChineseJournalofEcology2014334973－981DOI:10.13292/j.1000-4890.2014.0098Ⅵ．WhenseedswereplantedinthepotintheglassgreenhousecotyledonexcisiondidnotsignificantlyincreaseGPbutdidresultintheaccelerationofgerminationcourseandtheincreaseofGI．SlightincreaseofVIwasobservedwith1/4cotyledonexcisionbutalargedeclineinⅥwasobservedwith1/2or3/4cotyledonexcision．CotyledonexcisionresultedinvarieddegreesinthedecreasesofshootheightbasalstemdiametertaprootlengthnumberoflateralrootmaximumoflateralrootleafnumberleafareaperseedlingandtotaldrymassofQ．wutaishani-caseedlings．Thereweresignificantdifferencesinseedlingshootheightamongcotyledonexcisedandnon-excisedtreatments．Otherparametersofseedlingswith1/2and3/4cotyledonexcisionweresignificantlylowerthanthatofseedlingswithoutcotyledonexcision．Cotyledonexcisionhadlittleimpactonrootshootratioofseedlings．IncreaseinspecificleafareaSLAspecificshootlengthSSLandspecificrootlengthSＲLofseedlingsweredetectedduetocotyledonexci-sion．Comparedtothecontroltreatment1/2cotyledonexcisionsignificantlyincreasedSLAofseedlingsandallcotyledonexcisiontreatmentssignificantlyincreasedSSLofseedlings．Also1/2or3/4cotyledonexcisionsignificantlyincreasedSＲLofseedlingscomparedwithnoor1/4cotyledonexcision．KeywordsQuercuswutaishanicapredationseedgerminationseedlinggrowthpopulationregeneration．Quercus、200020012011a。Hoshizaki＆Miguchi2005Lombardo＆McCarthy2009Garcia-Cebrianetal．2003Li＆Ma2003。Garcia-Cebrianetal．2003Gomézetal．2008Gi-ertych＆Suszka2011。Yi＆Yang2010Bonal＆Muoz2007Yi＆Yang2010Fukumoto＆Kajimura2000Yi＆Zhang2008Kitajima＆Fenner2000Hulme＆Benkman2002、Hoshizakietal．1997Hoshizaki＆Miguchi2005Garcia-Cebrianetal．2003。Giertych＆Suszka20112012。Garcia-Cebrianetal．2003Li＆Ma20032012Hoshizakietal．199720032011a2012“”2003。Quercuswutaishanica、。、200120052007Li＆Ma20032011a2012479334。。11.1402。1.21.2.1480475%5min41Ⅰ31/4Ⅱ、1/2Ⅲ3/4Ⅳ。105℃48h412cm430。PQX-330A-12H14h/10h137μmol·m－2·s－125℃“”/20℃“”。5mmLiuetal．200524hmm。2。1.2.255%111—33123±5℃16±3℃。25．5%。201192823．5cm20cm16414“1．2．1”Ⅰ、Ⅱ、Ⅲ、Ⅳ、1/4、1/23/44。301cm。Pammenteretal．198448h114d。。。1.2.3germinationpercentageGP、coefficientofgerminationrateCGＲ、germinationindexGIvigorindexVIGP=/×100%CGＲ=∑t×n/∑n×100tntBoscagli＆Sette2001。GI=MDG×PVMDGmeandailygermi-nation=PVpeakvalue=Abdul-Baki＆Anderson1973。VI=×+cmBoscagli＆Sette2001。1.3201276“”Ⅰ、Ⅱ、Ⅲ、Ⅳ4shootheightSH、basalstemdiameterBSD、taprootlengthTＲL、579numberoflateralrootNLＲ、maximumoflateralrootMLＲ、leafnumberLN、leafareaperseedlingLAPSLI-3100、85℃48h1/10000totaldrymassTDM、rootshootratioＲSＲ、specificleafareaSLA、specificshootlengthSSLspecficrootlengthSＲL。ＲSＲ=/SLA=/cm2·g－1SSL=/cm·g－1SＲL=/cm·g－11.4SPSS13．0。22.11。84．4%1/497．8%3/4P＜0．05。1/41．70．7P＜0．011/4。21/43/485．8%85．3%85．0%3/4P＜0.01。2.23、、、、、、。39.0、7.91%、、Fig．1Germinationpercentage%coefficientofgerminationrategerminationindexandvigorindexofdifferentcotyle-donexcisiontreatmentsofQuercuswutaishanicaseedsplantedinartificialclimateincubatorⅠⅡ1/4Ⅲ1/2Ⅳ3/4P＜0．05。6793342、、Fig．2Germinationpercentage%coefficientofgerminationrategerminationindexandvigorindexofdifferentcotyle-donexcisiontreatmentsofQuercuswutaishanicaseedsplantedinpot3、、、、、、Fig．3EffectsofdifferentcotyledonexcisiontreatmentsontheSHBSDTＲLNLＲ＞1cmMLＲLNLAPSandTDMofQuercuswutaishanicaseedlings6.7cm10．0cmP＜0．05P＜0．011/23/4P＜0．011/47794、、Fig．4EffectsofdifferentcotyledonexcisiontreatmentsontheＲSＲSLASSLandSＲLofQuercuswutaishanicaseedlingsplantedinpotP＜0．0531/23/4P＜0．05P＜0．051/23/4P＜0．0538．1cm21/4、1/23/427.4、21.816．4cm221/23/4P＜0.051/41/23/4P＜0.05。40．9～1．01/2P＜0.01P＜0．05311．2、13