Purification and Characterization at Phosphomannomutase from Fresh Seeds of Sesbania cannabina Phosphomannomutase in the Biosynthesis of Sesbania Gum Nitrogen Fixation and ATPase of Root Nodules from Sesbania cannabina with Chemical and Physical Treatments Structure of Seedcoat of Sesbania cannabina and its Relation with Permeability Localization of ATPese and Dynamic Change in its Activity within Root Nodules of Legumes