Impact of Ion Implantation on Licorice(Glycyrrhiza uralensis Fisch) Growth and Antioxidant Activity Under Drought Stress

【摘要】 <正> Low energy ion beams are known to have stimulation effects on plant generationand to improve plants’ intrinsic quality.In the present study,the growth and physiological in-dex of licorice implanted with 0,8,10,12 and 14×(2.6×10¹⁵)ions/cm² were investigated underwell-watered and drought-stress conditions.The results showed that a proper dose of ion implan-tation was particularly efficient in stimulating the licorice growth and improving the plant biomasssignificantly in both the well-watered and drought-stress conditions.The physiological results oflicorice measured by leaf water potential,lipid oxidation,soluble protein and antioxidant systemshowed a significant correlation between ion implantation and water regime except for leaf waterpotential.Therefore,the study indicated that ion implantation can enhance licorice’s droughttolerance by increasing the activity of superoxide dismutase（SOD）,catalase（CAT）and DPPH（1,1-dipheny1-2-picrylhydrazyl）radical scavenging ability to lower oxidative damage to lipids inplants.Ion beam implantation,therefore,provides an alternative method to enhance licoricedrought tolerance.更多还原

【Abstract】 Low energy ion beams are known to have stimulation effects on plant generation and to improve plants’ intrinsic quality.In the present study,the growth and physiological in- dex of licorice implanted with 0,8,10,12 and 14×(2.6×10¹⁵)ions/cm² were investigated under well-watered and drought-stress conditions.The results showed that a proper dose of ion implan- tation was particularly efficient in stimulating the licorice growth and improving the plant biomass significantly in both the well-watered and drought-stress conditions.The physiological results of licorice measured by leaf water potential,lipid oxidation,soluble protein and antioxidant system showed a significant correlation between ion implantation and water regime except for leaf water potential.Therefore,the study indicated that ion implantation can enhance licorice’s drought tolerance by increasing the activity of superoxide dismutase（SOD）,catalase（CAT）and DPPH （1,1-dipheny1-2-picrylhydrazyl）radical scavenging ability to lower oxidative damage to lipids in plants.Ion beam implantation,therefore,provides an alternative method to enhance licorice drought tolerance.更多还原