PEG模拟干旱胁迫对高油酸花生品种幼苗形态和生理特性的影响

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Abstract：Toidentifytheefectsofdrought stressontheseedlinggrowthofhigh-oleicacid peanut varieties，thisresearch selects eighthigh-oleicacid peanut cultivarsas experimentalmaterials，usesahydroponic system inalaboratoryandapplies PEG-simulated drought stress during the seedling stagetoanalyzechanges inrootand leaf morphologicaland physiological characteristics across different high-oleicacid peanut cultivars.Theresults show thatunder PEG-simulated drought stress， the relative valuesof root morphological parameters androotactivityin high-oleicacid peanuts increase，thereby enhancing thedroughtresistancecoeficientofbiomass.Drought stressignificantlyreduces rootlength，rootsurfacearea，rootvolume， roottipnumber，rootactivityshootdryweight，ootdryweight，andtotaldryweight，whileincreasingtheroottooot ratio.Notably，smalligholeicacidpeanutcultivarsshowamorepronounceddeclineinootactivitythanconventioaloleic acid peanut cultivars，whereas large high-oleic acid peanut cultivars exhibit less reductioninroot-related idices compared to conventional peanutscultivars.Among thetested cultivars，Huayu9113，Shanhua21，Kainong 308，andJihua1exhibit relatively strong drought resistance.

eywords：High-oleic peanuts;PEG stress; root morphology;physiological characteristics

花生（ArachishypogaeaL.）是我国重要的油料作物，在国家粮油安全战略中具有重要作用。（剩余11713字）