{"doi":"10.1111/j.1399-3054.1973.tb04822.x","title":"Metabolism of Carbon‐14 Labelled Arginine, Citrulline and Ornithine in Intact Apple Stems","abstract":"<jats:title>Abstract</jats:title><jats:p>A study was made of the absorption and metabolism of arginine‐guanido‐<jats:sup>14</jats:sup>C, citrulline‐carbamyl‐<jats:sup>14</jats:sup>C and ornithine 1‐<jats:sup>14</jats:sup>C which had been applied to apple stem internodes by a perfusion technique at intervals throughout the year.</jats:p><jats:p>The results showed that these amino acids were interconverted according to the Krebs‐Henseleit cycle always in the direction arginine‐ornithine‐citrulline‐arginine. In addition ornithine was degraded by another pathway with loss of CO<jats:sub>2</jats:sub>. This loss was particularly extensive during the period June to August when labelled proline and glutamic acid were also found. The evidence is consistent with the initial breakdown of ornithine taking place via glutamic semi‐aldehyde.</jats:p>","journal":"Physiologia Plantarum","year":1973,"id":17602,"datarank":1.7246660332482848,"base_score":2.8903717578961645,"endowment":2.8903717578961645,"self_citation_contribution":0.4335557636844247,"citation_network_contribution":1.29111026956386,"self_endowment_contribution":0.4335557636844247,"citer_contribution":1.29111026956386,"corpus_percentile":null,"corpus_rank":null,"citation_count":17,"citer_count":17,"citers_with_citation_signal":15,"citers_with_endowment":15,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":125424,"name":"C. P. LLOYD‐JONES","orcid":null,"position":1,"is_corresponding":false},{"id":125423,"name":"D. G. HILL‐COTTINGHAM","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":2.8903717578961645,"endowment":2.8903717578961645,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"21071399","pmcid":null,"openalex_id":"https://openalex.org/W2069806382","authors":[],"funders":[],"total_grants":0,"fwci":2.3041,"citation_percentile":0.87813784,"influential_citations":0,"citation_trend":[{"year":2020,"count":1},{"year":2026,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1399-3054.1973.tb04822.x","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.1973.tb04822.x","host_type":"publisher"},{"url":"https://doi.org/10.1111/j.1399-3054.1973.tb04822.x","host_type":"journal"}],"fields_of_study":["Plant Physiology and Cultivation Studies","Postharvest Quality and Shelf Life Management","Horticultural and Viticultural Research","Biology","Agricultural and Food Sciences"],"mesh_terms":[],"keywords":["Arginine","Ornithine","Citrulline","Proline","Biochemistry","Chemistry","Amino acid","Metabolism","Urea cycle"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Clean water and sanitation"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-02T19:31:41.035576Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}