Development of Peptide Transport Activity in Barley Scutellum during Germination 1

AUTOR(ES)

Sopanen, Tuomas

RESUMO

The scutella separated from nongerminated grains of barley (Hordeum vulgare L. cv. Pirkka) took up labeled glycylsarcosine (Gly-Sar), glycylglycine, and leucylleucine at a rate of about 2 nanomoles per scutellum per hour. About 55% of the uptake of Gly-Sar (2 millimolar) was due to nonmediated uptake, but the active component was similar to that operating in the scutella from germinating grains (pH optimum about 4.5, Km about 10 millimolar).

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