Study On Seed Biological Characteristics And Seedlings Development Of Varieties Of Agapanthus

This article is the research of subspecies and varieties seed of agapanthus biology and the seedling growth processes. The research discovered that, the research discovered that, The outer Form Character of nine different subspecies and varieties seeds and embryo's is consistent, but the weight of one thousand seeds are difference; The law of water absorption of nine different subspecies and varieties are consistent, showed that the process of absorption of water is not the factor of difference target of the seed germination. The Germination Rates in the laboratory approaches to the Vitality that be determined by tetrazole staining very much, but the condition that suitable for Germination of varieties seeds is different. Nine subspecies and varieties seeds insensitive to variable temperature and the illumination condition whether there is. But the germination is sensitive to the high temperature, in 30℃,the germination of subspecies and varieties all obviously drops; The relevance between the result of conductivity and the Seedling Emergence is very high, that showing the conductivity determines the seed's vigor level relatively accurate; Nine subspecies and varieties seed emergent well in the vermiculite and soil mixed the vermiculite; The quality of 5th varieties seed Is best, the vigor,laboratory germination and the sowing seeds rate of seedlings emergence are all highest in nine subspecies and varieties. Next is the 6th,7th,8th seed, the rate of germination and the rate of seedlings emergence all achieved above 80%, also have good growth potential, the speed of seeding emergence relatively to be quicker. The 3th quality is worst, does not have the seedling ability; The soluble sugar content all has the remarkable rise with a-amylase vigor in the 3rd day before, Some varieties has the drop in the 5th day, the starch content all have the drop from the beginning of germination. The data analysis, the time that the soluble sugar content changed in germination was correlated with the speed of germination. The observation to exterior morphology In the seedling growth process discovered that the agapanthus is cotyledon excavated type. After a week of germination the sub- leaf sheath, the seed leaf joint differentiation is obvious, all growth normal seed all to have the root hair; Demonstrated to the seedling growth quantity determination result that, the 5th, 6th, 8th fresh weight and dry weight value is bigger, after sows seeds ten weeks the different subspecies and varieties difference has from leafs width appears.