Abstract:
:Changes in the levels of twenty-two free amino acids and in the amino acid composition of the total protein were measured throughout the development of cotyledons of a dwarf garden pea, Pisum sativum cv Greenfeast, grown in a constant environment. A sensitive double-isotope dansylation technique was used. Fresh weight, dry weight, and protein content were also followed. Twenty of the amino acids showed synchronous changes in levels, giving a developmental pattern containing four peaks; major peaks occurred very early and very late in development. The amino acid composition of the total protein, which was always very different from that of the free amino acid pool, showed early changes to one consistent with the final storage protein composition of the seed. These changes included a 50% drop in methionine content and a 70% rise in cysteine. While the maximum free methionine level occurred early in development, that of cysteine was late.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Macnicol PKdoi
10.1104/pp.72.2.492subject
Has Abstractpub_date
1983-06-01 00:00:00pages
492-7issue
2eissn
0032-0889issn
1532-2548journal_volume
72pub_type
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