Effects of foliar spraying plant growth regulator on rooting and physiological changes of Cerasus humilis softwood cuttings
Using the new shoots of'Nongda No.6'Cerasus humilis as material,a plant growth regulator was sprayed on the leaf surface of the new shoot of the mother plant one week before cutting.After cutting,the rooting rate and growth situation were counted,and the content changes of nutrients and endogenous hor-mones in the rooting process were analyzed.The results showed that the treatments of 10 mg·L-1 NAA,100 mg·L-1 PP333,and 50 mg·L-1 S3307 with different concentrations of spraying naphthoacetic acid(NAA),pa-clobutrazol(PP333),and uniconazole(S3307)on the leaves of mother plants had better effects,which could significantly shorten the length of internode of new shoots,improve rooting rate and root quality.The rooting rate of cuttings treated with 10 mg·L-1 NAA was the highest,which was 1.6 times that of control.S3307 treated with 50 mg·L-1 had the most developed new roots,and the rooting rate was 64.71％.Spraying NAA,PP333,and S3307 on the leaves of the mother plant increased the contents of starch,soluble sugar,and soluble protein in the cuttings,promoted the accumulation of IAA in the induction stage of root primor-dia induction period,inhibited the synthesis of GA3 and ABA,and was conducive to the rooting of the cut-tings,which could be popularized and applied in the cutting breeding of excellent strains of Cerasus humilis.
NETL
NSTL
万方数据
