Changes in Nutritive Materials in Off-season Mango in Flower Bud Differentiation Stage

摘要

Under off-season production mode,change laws of nutritive materials in leaves of fruiting mother branches of mango in flowering process induced by different agents were investigated. The results showed that the flowering time of mango trees in the potassium nitrate treatment was earlier than the ethephon treatment by 7 d,and changes trends of materials in leaves of the potassium nitrate and ethephon treatments were substantially the same. The nutritive materials in leaves showed trends of increasing at first and decreasing then. In early flower bud differentiation stage,soluble sugar and starch in leaves increased rapidly,and content of soluble protein also increased rapidly and showed its their peak values,thereby providing energy substances and structural substances demanded by flower bud formation. With flower bud differentiation going on,soluble sugar,starch and soluble protein decreased gradually. It was indicated that the accumulation of soluble sugar,starch and soluble protein is beneficial to flower bud differentiation.