牡荆植物学特征及叶片抗氧化特性分析OA

To improve the utilization efficiency of Vitex negundo germplasm resources and accelerate the breeding process,the botanical characteristics,leaf area,chlorophyll content,water content,and antioxidant properties of Vitex ne-gundo germplasm were analyzed.The results showed that Vitex negundo exhibits diverse phenotypes.Most germplasms have lanceolate leaves with coarsely serrated margins,pubescent leaf surfaces,and light purple inflorescences.M6,which possesses an elongated inflorescence and elliptic-lanceolate leaves,could be promoted as an excellent ornamental germ-plasm resource.No significant difference in leaf area was observed among M3,M9,M4,and M6,whereas significant differ-ences were found between these and the other Vitex negundo germplasms.M2 had the smallest leaf area,which was only 46.47%of that of M3.Leaf water content and chlorophyll content also varied among the germplasms.M1 exhibited the highest chlorophyll content,while M6 had the lowest.M6 and M9 showed high flavonoid content in the leaves,while M1,M5,M6,and M9 exhibited high DPPH radical scavenging activity.Antioxidant enzyme activities in the leaves differed among the Vitex negundo germplasms.M5 had the highest SOD and POD activities,while M8 had the highest APX activity,which was significantly higher than that of M1,M2,M4,M5,M6,M7,M9.