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Early studies on sucrose mobilization from the vacuole of germinating maize scutellum cells alluded to the likely possibility of SuSy being tonoplast associated.
An aspartic proteinase was also found in the PB of scutellum cells in dry barley grains.
Protein reserves in the cereal endosperm are sequentially degraded to small peptides and amino acids during germination and these are translocated across the scutellum to support growth of the embryo.
The deposition of pollinaria on the scutellum of bees clearly enhances the chances of cross-pollination, since it is very difficult for these insects to groom and remove the pollinaria from this region.
Peptide transport activity appears in the scutellum of barley seeds after 6-12 h imbibition, before any visible signs of germination, and increases rapidly to a maximum around 24 h imbibition.
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