%0 Journal Article
%T 水分胁迫下7个种源辽东冷杉幼苗水分利用效率差异
%A 腰政懋
%A 柴
%A 源
%A 冯
%A 博
%A 徐程扬
%J 北京林业大学学报
%P 27-34
%D 2015
%R 10.13332/j.1000-1522.20140452
%X Bytakingcurrent-yearseedlingsofAbiesholophyllafromsevenprovenancesinoneofnaturaldistributionareas(i.e.,easternmountainousareasofLiaoningProvince)asstudyobjects,westudiedlong-termwateruseefficiency(WUEL),instantaneouswateruseefficiency(WUEI),stablecarbonisotopecomposition(δ13C)ofA.holophyllaseedlings,andtheirrelationshipsunderthreewatertreatments(sufficientwatersupply,slightwaterstressandseverewaterstress)ingreenhouse,inordertorevealthedifferencesinwateruseefficiencyofA.holophyllaseedlingsamongprovenancesandthemechanismsunderlyingphysiologicalresponseofA.holophyllaseedlingstowaterstress.Theresultsshowedthatwiththeincreaseofwaterstress,WUELofseedlingsfromsevenprovenancesincreased,andthedifferenceofWUELamongprovenanceswassignificant(P<0.05)onlyunderseverewaterstresstreatment,buttherewasnosignificantdifferenceamongprovenancesundersufficientwatersupplyandslightwaterstresstreatment.WUEIandleafδ13Calsoincreased,andthedifferencesofWUEIandleafδ13Camongprovenanceswereverysignificant(P<0.01)underthreewatertreatments.ThedifferenceofWUELamongdifferentwatertreatmentsreachedsignificant(P<0.05)orverysignificantlevel(P<0.01),andthedifferenceofWUEIandleafδ13Camongdifferentwatertreatmentsallreachedverysignificantlevel(P<0.01).Leafδ13CandWUELofseedlingsundereachwatertreatmentshowedapositivecorrelation,andthiscorrelationbecamecloserandcloserwiththeincreaseofwaterstress.Therefore,leafδ13CcanbetheeffectiveindexforselectingprovenancesofA.holophyllawithhighwateruseefficiency.
%K Abies
%K holophylla
%K water
%K use
%K efficiency
%K water
%K stress
%K stable
%K carbon
%K isotope
%K composition
%K (δ13C)
%K provenance
%U http://j.bjfu.edu.cn/CN/abstract/abstract10195.shtml