Effects ofMicrolepia strigosaunder Drought Stress on Physiological Change Laws

Abstract

Research on Microlepia strigosa under natural drought stress treatment exhibited changes in physical properties. Stress increased relative conductivityꎬ POD activityꎬ soluble sugar and proline content. Soluble protein and MDA content high ̄low ̄highꎻ SOD activityꎬ chlorophyll contentꎬ total respiratory rateꎬ net photosynthetic rate Intercellular CO2 concentration and stomatal conductance is on the declineꎻ The CAT activity and Transpiration rate is raise ̄lower. The membrane system did not exhibit serious damage. The osmotic regulation system had good resistance to dehydration. The protective enzyme system played a role against free radicalsꎻ respiration and photosynthesis decreased significantlyꎬ but mainly for autonomic regulation of the plant. Results demonstrated that M􀆰 strigosa adapted to stressꎬ and showed a strong ability of recovery after drought and exhibited certain endurance ability.