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OA

To identify the effects of drought stress on the seedling growth of high-oleic acid peanut varieties,this research selects eight high-oleic acid peanut cultivars as experimental materials,uses a hydroponic system in a laboratory and applies PEG-simulated drought stress during the seedling stage to analyze changes in root and leaf morphological and physiological characteristics across different high-oleic acid peanut cultivars.The results show that under PEG-simulated drought stress,the relative values of root morphological parameters and root activity in high-oleic acid peanuts increase,thereby enhancing the drought resistance coefficient of biomass.Drought stress significantly reduces root length,root surface area,root volume,root tip number,root activity,shoot dry weight,root dry weight,and total dry weight,while increasing the root-to-shoot ratio.Notably,small high-oleic acid peanut cultivars show a more pronounced decline in root activity than conventional oleic acid peanut cultivars,whereas large high-oleic acid peanut cultivars exhibit less reduction in root-related indices compared to conventional peanuts cultivars.Among the tested cultivars,Huayu 9113,Shanhua 21,Kainong 308,and Jihua 11 exhibit relatively strong drought resistance.