The Enlargement Process And The Non-structural Carbohydrate Accumulation Preliminary Study Of Sagittaria Tifolia

This is the Sagittaria of the cultivars "Gua lao wu " as the test material, by Sagittaria enlargement process of the elongation growth of rhizome, corm shape dynamic growth, increasing the number of bulbs the state, bulb weight Growth dynamics and changes of water content of bulbs, corms during the enlargement process, and winter changes in non-structural carbohydrates preliminary study, the following conclusions:1. In Wuhan, Sagittaria rhizomes in early July from the pumping began to students, their number is increasing. In early October, the basic stability of the number of rhizomes per plant, with an average of about12per plant. The average length of rhizome increased, but the roughness changed little. In mid-September to an average length of rhizome58.6cm, thick as1.3cm,number reached an average of3per plant.2. From the bulbs began swelling in early September, its longitudinal and transverse, apical long trend of growth rate substantially the same. Among them, the terminal bud length during the30-50d fastest growth, followed by slower growth,75d, the terminal bud does not change the basic length. Bulb enlargement of the30-60d in the vertical and horizontal stems increased significantly, and the vertical/horizontal ratio of the stem is close to1, that is, when the bulbs with small ellipsoidal ball into the final round, to80d after the bulb does not change the size of the basic Table Pew purple. The number of bulbs in late September to mid-October to increase rapidly, the basic stability in late October, an average of12per plant.The main period of bulb enlargement Sagittaria in late September to late October, and the average weight increase of a single bulb showing "slow-fast-slow " variation of the moisture content is "up-down " variation.3.In Wuhan weather conditions, scraping the old varieties of Ukraine in early September bulbs from the start swelling. The results show that the enlargement process, the bulbs of total soluble sugar content increased slowly before the40d, followed by a rapid increase reducing sugar and fructose was "up-down-up " trend. Sucrose contents increased, about90days in the content of bulb enlargement up to28.05mg/g. Glucose increased first and then decreased. Starch and amylose and amylopectin content increased for changes of amylopectin/amylose ratio is always less than1.4． Arrowhead winter period, the bulb of the soluble sugar, sucrose, fructose content increased and then radiate downward trend, reducing sugar content decreased and then increased to2months early as the highest25.09mg/g, then decreased. Glucose content in the corms in late December and reached the lowest level, followed by a slow rise.Arrowhead in the winter period of amylose, amylopectin and starch content of the same trend, concentrations are reduced.