外源激素萘乙酸和6-苄氨基嘌呤对番茄侧枝生长和植株形态的影响OA

The use of exogenous hormones to regulate the plant type of tomato and other crops with strong lateral branch growth is the guarantee of modern high-efficiency agricultural production.In order to clarify the regulatory mecha-nism of naphthylacetic acid(NAA)and 6-benzylaminopurine(6-BA)on tomato plant type,the effects of exogenous NAA and 6-BA at different concentrations and application frequencies on tomato lateral branch growth and plant morphology were analyzed by using sparse-lateral-branch tomato variety NT823 and lush-lateral-branch tomato variety NT68 as materials.The results showed that the application concentration and frequency of NAA and 6-BA had significant effects on the lateral branch growth and plant morphology of tomato.53.7μmol/L NAA significantly inhibited the lateral branch growth of NT68 tomato,while 400.0 μmol/L 6-BA signifi-cantly promoted the lateral branch growth of NT823 tomato.Three to four applications of NAA could effectively inhibit tomato lateral branch growth and promote plant height and stem diameter.One application of 6-BA had the greatest promoting effect on the number of lateral branches,and three to four applications of 6-BA was most conducive to the elonga-tion of lateral branches and the development of stem diameter,but also significantly inhibited the growth of plant height.The sensitivity of NT823 to NAA and 6-BA was higher than that of NT68,and the sensitivity of high-node lateral branch length to NAA and 6-BA was higher than that of low-node lateral branch length.The results of this study provide a basis for the targeted regulation of tomato plants through the rational application of exogenous hormones NAA and 6-BA.