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ARGININE METABOLISM IN GERMINATING SEEDS OF SOME MEMBERS OF THE LEGUMINOSAE
Author(s) -
JONES V. M.,
BOULTER D.
Publication year - 1968
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1968.tb06404.x
Subject(s) - vicia faba , germination , pisum , sativum , arginine , cotyledon , proline , arginase , shoot , biology , ornithine , raphanus , botany , phaseolus , incubation , radicle , vicia , horticulture , biochemistry , amino acid
S ummary Estimation of the arginine content of germinating seeds of Vicia faba, Canazalia ensiformis, Phaseolus vulgaris and Pisum sativum , showed a lowering in concentration during the first week of germination. When [ 14 C] arginine was fed to cotyledon discs of Vicia faba , ornithine, proline, urea and carbon dioxide quickly became labelled and other amino acids became labelled after a longer period of incubation. Arginase was extracted from the V. faba and shown to be present in the roots, shoots and cotyledons during the first 6 days of germination. Urease was also extracted from V. faba and shown to have a pH optimum of 8.0 for extraction. The possible presence of an ornithine cycle is discussed.