Amino acid and peptide uptake in the scutella of germinating grains of barley, wheat, rice and maize

Marjatta Salmenkallio, Tuomas Sopanen

Research output: Contribution to journalArticleScientificpeer-review

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.
Original languageEnglish
Pages (from-to)1285-1291
JournalPlant Physiology
Volume89
Issue number4
Publication statusPublished - 1989
MoE publication typeA1 Journal article-refereed

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Hordeum
Triticum
Zea mays
barley
peptides
uptake mechanisms
Amino Acids
rice
Peptides
wheat
amino acids
corn
Basic Amino Acids
Proline
proline
Carboxypeptidases
Endosperm
carboxypeptidases
Arginine
Hordeum vulgare

Cite this

Salmenkallio, Marjatta ; Sopanen, Tuomas. / Amino acid and peptide uptake in the scutella of germinating grains of barley, wheat, rice and maize. In: Plant Physiology. 1989 ; Vol. 89, No. 4. pp. 1285-1291.
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title = "Amino acid and peptide uptake in the scutella of germinating grains of barley, wheat, rice and maize",
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.",
author = "Marjatta Salmenkallio and Tuomas Sopanen",
year = "1989",
language = "English",
volume = "89",
pages = "1285--1291",
journal = "Plant Physiology",
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Amino acid and peptide uptake in the scutella of germinating grains of barley, wheat, rice and maize. / Salmenkallio, Marjatta; Sopanen, Tuomas.

In: Plant Physiology, Vol. 89, No. 4, 1989, p. 1285-1291.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Amino acid and peptide uptake in the scutella of germinating grains of barley, wheat, rice and maize

AU - Salmenkallio, Marjatta

AU - Sopanen, Tuomas

PY - 1989

Y1 - 1989

N2 - 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.

AB - 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.

M3 - Article

VL - 89

SP - 1285

EP - 1291

JO - Plant Physiology

JF - Plant Physiology

SN - 0032-0889

IS - 4

ER -