Studies On Physiological And Biochemical Changes During The Formation Of Swollen Lotus Rhizome

The changes of reserve materials , endogenous hormones, mineral elements during the formation of the swollen lotus rhizome (Nelumbo nucifera Gaer tn.) is analyzed by using the materials of Meirenhong,Wuzhi 2,Elian 4.The results are as follows. Accumulate of reserve materials are tie up with the formation of the swollen lotus ihizom e. The contents of every variety' s dy materials have a dsti.nct increase during the formation of the swollen lotus rhizome. The content of anaphase is 5 times than metaphase. The contents of starch increase continually at the whole period. There is a sharp enhance in anaphase. It' sapproximately 2 times than in metaphase and keep 11%~15% of fresh weight ultimately. Reducing sugar levels first increase rapidly and than drop promptly. It keeps a steady level in swollen anaphase. The contents of total dissoluble sugar increase tardily from beginning to metaphase. There is a sharp enhance and 2% in proportion in anaphase. The quantity of protein accumulate assume a slow ascending beeline before metaphase. In anaphase it achieve top and content is 2 times than metaphase. It keeps 1.3%of fresh weight.Endogenous hormones react during the formation of the swollen lotus rhizome together. But they are not the direct decisive materials. GAi levels enhance continuously from beginning to metaphase, and then descend rapidly. IAA levels increase in prophase in some sort. There is a sharp enhance in metaphase, and than descent rapidly. Contents of them have only 52%~59% of quondam. Contents of ZT descend all the while; they are at tiptop in beginning and at nadir in anaphase. Their levels are 41%~45% of primordial. Contents of ABA descent in some sort inprophase, and then enhance in a way in metaphase. There is a sharp enhance in anaphase, and their levels are 2.5 times than forward stage. SA also acts a significant role during the formation of the swollen lotus rhizome. Transformation trend of SA is in accord with IAA. GA3/IAA has a prominent influence best of all during the formation of the swollen lotus rhizome.Transformation trends of mineral elements are similitude. They all enhance slowly before metaphase, and then rapidly in anaphase. Contents of nitrogen, kalium and their ratio have prominent influences to yields of lotus rhizome. Lotus rhizome is an appreciated kalium crop. Kalium by any possibility is concerned with synthesize and transportation of assimilative production; at the same time, it also influences the levels of endogenous hormones and their ratio.