Effects of Different Plant Growth Regulators on Flowering Physiology and Flowering Characters of Cymbidium sine ns e
The Cymbidium sinense cultivar'Qijian Baimo'were used to study the effect of different concentrations of gibberellins(GA3)(B1～B4)and 6-Benzylaminopurine(6-BA)(A1～A4)on physiological indicators,flowering time and flowering quality during the flowering process of Cymbidium sinense.The results indicated that:com-pared with the control(CK),spraying 6-BA or GA3 could increase the content of soluble protein,soluble sugar,starch and activity of related enzymes in the leaves at the flower bud differentiation stage;compared with the control group 6-BA treatment could promote flower bud differentiation,increase the number of flower buds and flower number,and make it blo-ssom earlier,but inhibit flower stalk growth.Among them,6-BA 100 mg/L had the best compre-hensive flowering qualit,which could increased the number of flower buds by 37.4％and advance the flowering date by 5.8 days;GA3 treatment could not promote flower bud differentiation and early flowering compared with the control,but significantly increased the length of flower stalk and sepal.However,high concentration of GA3 treatment(200 mg/L)could affect the growth of Cymbidium sinense,resulting in delayed floret and serious floret de-formity.Therefore,compared with GA3 treatment,spraying 100 mg/L 6-BA could significantly increase the con-tent of various flowering physiological indexes during flower bud differentiation,increase the number of flower buds,advance florescence.The study conclusions provided reference for developing a standardized technical sys-tem for floral regulation in Chinese cymbidium.
Chinese cymbidiumPlant growth regulatorFlower bud differentiationFlowering physiologyFlo-wering regulation
万方数据
维普
