Abstract
Scutella separated from germinating grains of barley (Hordeum vulgare L.), wheat (Triticum aestivum L.), rice (Oryza sativa L.), and maize (Zea mays L.) took up the four amino acids and the three peptides tested from incubation media. The uptake of amino acids by wheat scutella was similar to that of barley scutella and was via at least four uptake systems: two nonspecific amino acid uptake systems, one system specific for proline, and another system specific for basic amino acids. The scutellum of rice apparently has two nonspecific systems and a system specific for the basic amino acids, but the proline-specific system is lacking. The scutellum of maize seems to have the same systems as the scutellum of rice, but one (or both) of the nonspecific systems differs from that of the other species studied in taking up arginine only slowly. No great differences were observed in the uptake of peptides in the four species studied. The rates of uptake of different amino acids and peptides were of the same order of magnitude in the four cereals. The fact that carboxypeptidase activities in the endosperms of wheat and barley are 20-to 100-fold higher than those in rice and maize, does thus not seem to be reflected in the uptake properties of the scutella.
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Selected References
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- Higgins C. F., Payne J. W. The Peptide pools of germinating barley grains: relation to hydrolysis and transport of storage proteins. Plant Physiol. 1981 Apr;67(4):785–792. doi: 10.1104/pp.67.4.785. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mikola L. Acid Carboxypeptidases in Grains and Leaves of Wheat, Triticum aestivum L. Plant Physiol. 1986 Jul;81(3):823–829. doi: 10.1104/pp.81.3.823. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nyman S., Sopanen T., Mikola J. Regulation of development of leucine uptake activity by glutamine in the scutellum of germinating barley grain. Plant Physiol. 1983 Sep;73(1):135–141. doi: 10.1104/pp.73.1.135. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sopanen T., Burston D., Matthews D. M. Uptake of small peptides by the scutellum of germinating barley. FEBS Lett. 1977 Jul 1;79(1):4–7. doi: 10.1016/0014-5793(77)80337-2. [DOI] [PubMed] [Google Scholar]
- Sopanen T., Burston D., Taylor E., Matthews D. M. Uptake of glycylglycine by the scutellum of germinating barley grain. Plant Physiol. 1978 Apr;61(4):630–633. doi: 10.1104/pp.61.4.630. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sopanen T. Development of Peptide Transport Activity in Barley Scutellum during Germination. Plant Physiol. 1979 Oct;64(4):570–574. doi: 10.1104/pp.64.4.570. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sopanen T., Uuskallio M., Nyman S. Characteristics and development of leucine transport activity in the scutellum of germinating barley grain. Plant Physiol. 1980 Feb;65(2):249–253. doi: 10.1104/pp.65.2.249. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sopanen T., Väisänen E. Uptake of glutamine by the scutellum of germinating barley grain. Plant Physiol. 1985 Aug;78(4):684–689. doi: 10.1104/pp.78.4.684. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stewart C. R. Some characteristics of the uptake of glutamine by corn scutellum. Plant Physiol. 1971 Jan;47(1):157–161. doi: 10.1104/pp.47.1.157. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Väisänen E., Sopanen T. Uptake of proline by the scutellum of germinating barley grain. Plant Physiol. 1986 Apr;80(4):902–907. doi: 10.1104/pp.80.4.902. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Winspear M. J., Preston K. R., Rastogi V., Oaks A. Comparisons of Peptide hydrolase activities in cereals. Plant Physiol. 1984 Jun;75(2):480–482. doi: 10.1104/pp.75.2.480. [DOI] [PMC free article] [PubMed] [Google Scholar]