ABSTRACT
The mobilization of storage reserves, with particular emphasis on storage proteins of Mucuna pruriens (L.) DC., cotyledons, and embryo was investigated from the ultrastructural and biochemical points of view. Proteins and starch were the two main storage substances in cotyledons, and proteins and lipids were the main ones in the embryo. Embryo protein bodies were smaller and fewer in number than those of cotyledons. Structural and ultrastructural data determined between 24 and 48 h after imbibition and between 48 and 72 h after imbibition, the end of significant embryo and cotyledon protein mobilization, respectively, indicating more precocious storage protein mobilization in the axis than cotyledons. Moreover, storage protein mobilization in embryo and cotyledons occurred before the end of germination. Water soluble proteins were separated by sodium dodecyl sulfate polyacrylamide gel electrophoresis, producing 29 bands with molecular weights from 14 to 90 KDa. Embryo extract contained more proteins than cotyledon extract, contained seven characteristic bands, and showed a higher variability of the optical density trend than cotyledon.
Subject(s)
Cotyledon , Mucuna , Animals , Cotyledon/chemistry , Cotyledon/metabolism , Cotyledon/ultrastructure , Humans , Mucuna/anatomy & histology , Mucuna/chemistry , Mucuna/embryology , Plant Proteins/genetics , Plant Proteins/metabolism , Seeds/metabolism , Seeds/ultrastructureABSTRACT
Domatia of myrmecophytes have been reported only in vegetative organs so far. In this paper, we report the first record of domatia formed on the legume surface of Mucuna interrupta. The domatium consists of 12-16 vertical lamellae which traverse the fruit surface obliquely to form long, narrow hollows, providing two ant species with a nest site.
