6-苄氨基嘌呤对马铃薯气孔特征、干物质分配和块茎产量的影响OA

The effects of different concentrations of 6-benzylaminopurine(6-BA)on leaf stomatal character-istics,dry matter distribution,and yield of potato were investigated to provide a basis for the effective use of exoge-nous hormones to promote potato production.The potted potato variety'Favorita'in an artificial climate chamber was used as material,and 0(CK),15,25 mg·L-1,and 35 mg·L-1 6-BA foliar spraying treatments were set up,respectively.Leaf stomatal characteristics,plant growth,and physiological indexes were observed at different growth stages.After harvest,dry matter distribution and yield formation factors were analyzed.The results showed that compared with CK,the indexes of potato were improved and promoted under 15 mg·L-1 6-BA treatment.A-mong them,the stomatal density of adaxial and abaxial surfaces of leaves increased significantly by 27.36％and 3.24％,respectively.The relative water content and transpiration rate of leaves increased by 6.32％and 2.75％,re-spectively.The distribution proportion of dry matter in tubers,yield per plant,number of tubers per plant,and the fresh mass of tubers increasred by 9.33％,40.49％,20.09％,and 17.31％,respectively.Correlation analysis indi-cated that the stomatal density of adaxial and abaxial surfaces of leaves was significantly positively correlated with the number of tubers per plant(P＜0.05).In conclusion,a favorable concentration of exogenous 6-BA treatment could significantly increase the stomatal density of potato leaves,the proportion of dry matter in tubers,and tuber yield,and the optimal concentration was 15 mg·L-1.