Factors Affecting Rooting Of Ginkgo Biloba Cuttings And Physiological And Biochemical Changes During Rooting

Ginkgo biloba L.belongs to the family Ginkgo biloba,which grows slowly.However,Ginkgo biloba has a long life span.Ginkgo biloba is widely distributed in China,from north to Shenyang,southeast to southern Taiwan,east to Zhejiang,and west to Tibet.,Nanda Guangzhou,distributed in more than 20 provinces and municipalities in China,Ginkgo biloba is a large deciduous tree,has a high use value,Ginkgo biloba fruit can delay aging,prevent cardiovascular and cerebrovascular diseases,beauty and beauty,etc.The value,ginkgo's appearance is tall,the trunk is straight,it has a high ornamental value,and it also has a high greening value and the value of the material.The ginkgo has many kinds of breeding methods,and the cutting propagation can retain the excellent traits of ginkgo.It can shorten the flowering period of Ginkgo biloba,but the cuttings of Ginkgo biloba have obvious positional effect and age effect.In this paper,the cutting propagation technique of Ginkgo biloba and the rooting rate and nutrient content during cutting,and the endogenous root enzyme in cuttings Changes in activity,changes in endogenous hormone content,and dynamic development of adventitious roots were studied,mainly Study results are as follows:(1)Ginkgo biloba belongs to the rooting type of callus.The rooting effect was the best after NAA treatment.The rooting rate of cuttings was higher than that of other treatment groups.The rooting rate of replanted cuttings was higher than that of 1a and 2a cuttings.The cutting effect is better than July.For the cutting substrate,perlite,turf and vermiculite should be selected 1:1:1.(2)During the rooting process of cuttings,many nutrients are consumed to supply the formation of callus and adventitious roots.The content of soluble sugar and soluble protein in the rooting process of cuttings shows a certain regularity.During the rooting process,the soluble sugar and soluble protein showed a first increase,then decreased and then increased,which decreased in the callus stage and decreased during the rooting period.However,the soluble sugar and soluble egg content increased and gradually became higher.smooth.(3)During the rooting process of cuttings,the activities of POD,PPO and IAAO showed different changes during the rooting process.The activity of POD showed a trend of lowering and then increasing,and the activity of IAAO was The increase in the rate of decrease,the activity of PPO showed a tendency to decrease,the hormone treatment increased the activity of POD and PPO,and the decrease of IAAO activity was beneficial to the accumulation of IAA.(4)During the process of rooting,the contents of hormones such as IAA,GA,ZR and ABA are closely related to the growth and development of roots,and affect the growth and development of roots.The change of IAA content is “decreased-raised”.The decrease-rise trend,the change of ABA content showed the trend of “rise-low-rise”,the change of ABA content showed the trend of “rise-low-rise”,and the content of ZR showed “rise-lower” with the cutting time.Raise-lower the trend.