Study On Cutting Propagation And Shade Resistance Of Greyblue Underleaf Pearl(Phyllanthus Glaucus)

Greyblue Underleaf pearl (Phyllanthus glaucus) belongs to the Euphorbiaceae family, Phyllanthus genera. It is an excellent and undeveloped bush which has huge potential for garden use because of its comely branches and leaves, trim fruits and powerful budding force. This paper focuses on the study of Greyblue Underleaf pearl's field habitat survey, cuttage propagation and shade tolerance. Come to conclusions as follows:(1)According to the survey and transplant experiment, the field habitat of Greyblue Underleaf pearl was recorded, and its seeding plants can grow naturally in Lin'an region.(2)Cuttage propagation experiments showed that: Greyblue Underleaf pearl had three kinds of rooting types, including skin rooting type, callus rooting type and the type which had both skin rooting and callus rooting. Therefore, it's one kind of bush which was easy to root. It confirmed that the best treatment of softwood cutting rooting was IBA 250 mg·L-1, and 1000 mg·L-1 NAA+IBA(1:1)10 s was best for hardwood of Greyblue Underleaf pearl. It also confirmed that cuttings whose diameter was 3 to 5 mm had high rooting quality and rooting rate, which also had the longest root length and the largest number of roots. Therefore, it was suit for hardwood cutting in spring. And it also can be found, that the rooting rate of cuttings without leaves was 38.8%, which was the lowest, while cuttings with half of a leaf has the highest rooting rate, which reached to 89.06%. Different seasons had different cutting rooting results. The rooting rate was 92.13%, the average number of roots was 7.37, the average length of roots were 6.67cm, hence summer was the best cutting season for Greyblue Underleaf pearl.(3)By the changes of their content of total soluble sugar, soluble protein, and holding water, relative conductivity, SOD activity, POD activity, and chlorophyll content under five different shading treament, the comprehensive evaluation of the shade-tolerance ability had been made about there plants including reference plants(Corylopsis glandulifera var. hypoglauca and Lespedeza formosa).The order of the ability of shade-tolerance from strong to weak was: Phyllanthus glaucus > Corylopsis glandulifera var. hypoglauca > Lespedeza formosa. Results of chlorophyll fluorescence parameters in three plants under different shading treatments confirmed that Greyblue Underleaf pearl had the strongest adaptability.