齐齐哈尔地区福禄考胁迫抗逆性研究
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中图分类号：S688.4 文献标识码：A doi：10.13601/j.issn.1005-5215.2025.05.014
Studyon StressResistanceofPhloxdrummondii inQiqihar Area
Li Meng1，Chen Xuan²，Sun Li³，Yuan Shanglongl，Wang Dan4* （1.QiqiharLadscapereeningompanyQiaro5，China;2MudajangNalUiversityudanang7oina; 3.LongshaParkof QiqiharCity，Qiqihar161oo5，China;4.East China InventoryandPlanningInstitute，NationalForestryand Grassland Administration，Hangzhou310ooo，China）
AbstractThephysiologicaladaptationmechanismofPhloxdrummondiitodroughtandsaltstresswasanalyzedtoprovidescientific basisforitsstresscultivationandmanagement.Thevariationlawofplantgrowthindexphotosyntheticpigmentmetabolism， antioxidantenzymeactivityandmembranelipidperoxidationlevelwereanalyzedbysetingdiferentintenstiesofdroughtandsalt treatment.Theesultssowedasfollows：underdroughtstre，hloxdrummondiipreferentiallyaintainedtelongitudialgowthof stems，theplantheightincreasedsignificantlybutthestemdiameterwasnotafected，andthebomassaccumulationpresenteda nonlineartrendofirstpromotionandtheninibition.Thechangeofchlorophyllomponentratioandtheincreaseofcarotenoidma fractionhangedthelightenergyutiationfciency.Attesaetime，thecatalaseactivityincreasedsignificantlywithestre intensity，andthemetabolicstabilitywasmaintainedsynergisticall.Thecomprehensiveresistancewasoptimalundera15-day wateringinterval.Ihearlystage，lowsalttransientlypromotedtesynthesisofphotosyntheticpigments.Intemidlestage（salt mass fraction ⩽1.0% ，lasting forabout14 days），thegrowth balance wasachievedbyincreasingchlorophyllmass fractionand reducingmembranelipidperoxidationlevelwhilehighsaltorlong-termstressledtothecolapseofphotosyntheticsystemand irreversilecelldamage.Moderatestressunderdroughtconditionsandthemiddlestageofsaltstressarethekeyindowperiodsto optimizethestresresistanceandgrowthbalanceofPhoxdummondi.Itissuggestedtatthcultivatiomodewithsaltas fraction ⩽1.0% and treatment period ⩽7 daysshould be selected for saline soil.
KeywordsPhlox drummondii;drought stress;salt stress
丛生福禄考（Phloxdrummondii）为花葱科（Polemoniaceae）福禄考属（ Phlox 植物，原产自北半球温带地区。（剩余6998字）
