{"id":"https://openalex.org/W2004568278","doi":"https://doi.org/10.1093/jxb/43.4.525","title":"Influx and Efflux of Nitrate and Ammonium in Italian Ryegrass and White Clover Roots: Comparisons Between Effects of Darkness and Defoliation","display_name":"Influx and Efflux of Nitrate and Ammonium in Italian Ryegrass and White Clover Roots: Comparisons Between Effects of Darkness and Defoliation","publication_year":1992,"publication_date":"1992-01-01","ids":{"openalex":"https://openalex.org/W2004568278","doi":"https://doi.org/10.1093/jxb/43.4.525","mag":"2004568278"},"language":"en","primary_location":{"id":"doi:10.1093/jxb/43.4.525","doi":"https://doi.org/10.1093/jxb/43.4.525","is_oa":false,"landing_page_url":"https://doi.org/10.1093/jxb/43.4.525","pdf_url":null,"source":{"id":"https://openalex.org/S32610980","display_name":"Journal of Experimental Botany","issn_l":"0022-0957","issn":["0022-0957","1460-2431"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-b","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311648","host_organization_name":"Oxford University Press","host_organization_lineage":["https://openalex.org/P4310311648","https://openalex.org/P4310311647"],"host_organization_lineage_names":["Oxford University Press","University of Oxford"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Experimental Botany","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5109995459","display_name":"James H. Macduff","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. H. MACDUFF","raw_affiliation_strings":["AFRC Institute of Grassland and Environmental ResearchHurley, Maidenhead, Berks. SL65LR, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"AFRC Institute of Grassland and Environmental ResearchHurley, Maidenhead, Berks. SL65LR, UK","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103545702","display_name":"S. B. Jackson","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. B. JACKSON","raw_affiliation_strings":["AFRC Institute of Grassland and Environmental Research Hurley, Maidenhead, Berks. SL65LR, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"AFRC Institute of Grassland and Environmental Research Hurley, Maidenhead, Berks. SL65LR, UK","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3292,"currency":"GBP","value_usd":4341},"apc_paid":null,"fwci":5.9353,"has_fulltext":false,"cited_by_count":101,"citation_normalized_percentile":{"value":0.95925286,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"43","issue":"4","first_page":"525","last_page":"535"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11247","display_name":"Plant nutrient uptake and metabolism","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T11247","display_name":"Plant nutrient uptake and metabolism","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12566","display_name":"Nitrogen and Sulfur Effects on Brassica","score":0.0005000000237487257,"subfield":{"id":"https://openalex.org/subfields/1102","display_name":"Agronomy and Crop Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T13591","display_name":"Pasture and Agricultural Systems","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/1102","display_name":"Agronomy and Crop Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/nitrate-uptake","display_name":"nitrate uptake","score":0.8949999809265137},{"id":"https://openalex.org/keywords/ammonium-uptake","display_name":"ammonium uptake","score":0.9779999852180481},{"id":"https://openalex.org/keywords/lolium-multiflorum","display_name":"Lolium multiflorum","score":0.9649999737739563},{"id":"https://openalex.org/keywords/white-clover","display_name":"white clover","score":1.0},{"id":"https://openalex.org/keywords/darkness","display_name":"darkness","score":0.6359999775886536},{"id":"https://openalex.org/keywords/defoliation","display_name":"defoliation","score":0.9800000190734863},{"id":"https://openalex.org/keywords/nitrogen-translocation","display_name":"nitrogen translocation","score":0.5870000123977661},{"id":"https://openalex.org/keywords/seedlings","display_name":"seedlings","score":0.37299999594688416}],"concepts":[{"id":"https://openalex.org/C2779027399","wikidata":"https://www.wikidata.org/wiki/Q204170","display_name":"Darkness","level":2,"score":0.896039605140686},{"id":"https://openalex.org/C2777732983","wikidata":"https://www.wikidata.org/wiki/Q148675","display_name":"Trifolium repens","level":2,"score":0.8660677075386047},{"id":"https://openalex.org/C2779159236","wikidata":"https://www.wikidata.org/wiki/Q157883","display_name":"Lolium multiflorum","level":2,"score":0.8431947827339172},{"id":"https://openalex.org/C67283384","wikidata":"https://www.wikidata.org/wiki/Q633912","display_name":"Stolon","level":2,"score":0.5930876135826111},{"id":"https://openalex.org/C21410773","wikidata":"https://www.wikidata.org/wiki/Q220869","display_name":"Shoot","level":2,"score":0.5763757228851318},{"id":"https://openalex.org/C2779870022","wikidata":"https://www.wikidata.org/wiki/Q190901","display_name":"Ammonium","level":2,"score":0.5034112334251404},{"id":"https://openalex.org/C55969652","wikidata":"https://www.wikidata.org/wiki/Q259028","display_name":"photoperiodism","level":2,"score":0.46698588132858276},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.4259512424468994},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.4044966697692871},{"id":"https://openalex.org/C144027150","wikidata":"https://www.wikidata.org/wiki/Q48803","display_name":"Horticulture","level":1,"score":0.38982483744621277},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.366983562707901},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.35420769453048706},{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.33687537908554077},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1093/jxb/43.4.525","doi":"https://doi.org/10.1093/jxb/43.4.525","is_oa":false,"landing_page_url":"https://doi.org/10.1093/jxb/43.4.525","pdf_url":null,"source":{"id":"https://openalex.org/S32610980","display_name":"Journal of Experimental Botany","issn_l":"0022-0957","issn":["0022-0957","1460-2431"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-b","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311648","host_organization_name":"Oxford University Press","host_organization_lineage":["https://openalex.org/P4310311648","https://openalex.org/P4310311647"],"host_organization_lineage_names":["Oxford University Press","University of Oxford"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Experimental Botany","raw_type":"journal-article"},{"id":"mag:2509026912","doi":null,"is_oa":false,"landing_page_url":"https://www.jstor.org/stable/23694076","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6875,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W1967502600","https://openalex.org/W1983248885","https://openalex.org/W1988591456","https://openalex.org/W1988847682","https://openalex.org/W1988904782","https://openalex.org/W1989427022","https://openalex.org/W2006144297","https://openalex.org/W2020314235","https://openalex.org/W2023193018","https://openalex.org/W2024166300","https://openalex.org/W2032984123","https://openalex.org/W2034493586","https://openalex.org/W2035509161","https://openalex.org/W2043093974","https://openalex.org/W2044309414","https://openalex.org/W2063969388","https://openalex.org/W2070460035","https://openalex.org/W2074084101","https://openalex.org/W2076549954","https://openalex.org/W2079264345","https://openalex.org/W2086475255","https://openalex.org/W2088335415","https://openalex.org/W2089882798","https://openalex.org/W2101728806","https://openalex.org/W2110869644","https://openalex.org/W2111451748","https://openalex.org/W2118520678","https://openalex.org/W2122300604","https://openalex.org/W2125781769","https://openalex.org/W2144328805","https://openalex.org/W2154658100","https://openalex.org/W2157588751","https://openalex.org/W2169094582","https://openalex.org/W2404886288","https://openalex.org/W2462632937"],"related_works":["https://openalex.org/W2509026912","https://openalex.org/W2431592794","https://openalex.org/W2017861115","https://openalex.org/W2023193018","https://openalex.org/W2020314235","https://openalex.org/W1994758726","https://openalex.org/W4236110836","https://openalex.org/W2048848450","https://openalex.org/W1971778374","https://openalex.org/W2065912981"],"abstract_inverted_index":{"Seedlings":[0],"of":[1,13,42,48,109,115,119,141,194,203,228,251,265,279,288,293,303],"Italian":[2],"ryegrass":[3,77,106,125,142],"(Lolium":[4],"multiflorum":[5],"Lam.":[6],"cv.":[7,19],"RVP)":[8],"and":[9,46,50,57,75,95,113,123,196,201,217,256,270,276,296],"clonal":[10],"stolon":[11],"cuttings":[12],"white":[14,72,131],"clover":[15,73,132],"(Trifolium":[16],"repens":[17],"L.":[18],"Blanca)":[20],"were":[21,52,80,244],"grown":[22],"for":[23,71,76,105,145,172,224,300],"19":[24],"d":[25],"in":[26,121,130,136,160,215,221,232,240,262,284],"flowing":[27],"solution":[28],"culture,":[29],"with":[30,85,156],"N":[31,304],"supplied":[32],"as":[33],"either":[34,81],"250":[35],"mmol":[36],"m\u22123":[37],"NO3\u2212":[38,49,120,149,195,225,252,280],"or":[39,84],"NH3+":[40],".Rates":[41],"net":[43,110,137,192],"uptake,":[44,111],"influx":[45,93,112,161,174,216,233,295],"translocation":[47],"NH4+":[51,116,146,152,197,207,257],"then":[53],"determined":[54],"using":[55],"15N":[56],"13N":[58,92],"labelling":[59],"techniques:":[60],"between":[61],"3\u20135":[62],"h":[63,69,103],"into":[64,98],"the":[65,99,127,226,248,263,277,285,289,301],"photoperiod":[66,100],"following":[67,101,139],"8":[68],"darkness":[70,104,187],"(CL),":[74],"plants":[78],"that":[79],"entire":[82],"(IL)":[83],"shoots":[86],"excised":[87],"90":[88],"min":[89,97],"prior":[90],"to":[91,164,179,186,246,298],"(IC);":[94],"75":[96],"37\u201339":[102],"(ID).":[107],"Rates":[108],"efflux":[114,297],"exceeded":[117],"those":[118],"IL":[122,204],"IC":[124],"plants:":[126],"opposite":[128],"occurred":[129],"(CL).":[133],"The":[134,242,291],"decrease":[135,159,214,220,231],"uptake":[138,193,305],"defoliation":[140],"was":[143,154,209,234],"greater":[144],"(62%)":[147],"than":[148],"(40%).":[150],"For":[151,206],"this":[153,208],"associated":[155],"a":[157,212,218,229,237],"large":[158,213,230],"from":[162,177],"11\u00b70":[163],"6.0\u03bcmol":[165],"h\u22121":[166,182,254,259,268,274],"g\u22121":[167],"root":[168],"fr.":[169],"wt;":[170],"but":[171],"NO3\u2212,":[173],"only":[175],"decreased":[176],"4\u00b72":[178],"3\u00b77":[180],"\u03bcmol":[181,273],"g\u22121.":[183],"Prolonged":[184],"exposure":[185],"(ID":[188],"plants)":[189],"also":[190],"lowered":[191],"by,":[198],"respectively,":[199],"86%":[200],"95%":[202],"levels.":[205],"characterized":[210],"by":[211,236],"small":[219],"efflux;":[222],"whilst":[223],"effect":[227],"reinforced":[235],"smaller":[238],"increase":[239],"efflux.":[241],"data":[243],"used":[245],"estimate":[247],"translocatory":[249],"fluxes":[250],"(0\u00b73\u20132\u00b70\u03bcmol":[253],"g\u22121)":[255,269],"(0\u00b703\u20130.4\u03bcmol":[258],"g\u22121),":[260,275],"assimilation":[261],"roots":[264],"NO3\u2212(0\u00b72\u20132":[266],"6\u03bcmol":[267],"NH+4":[271],"(0\u00b75\u20138\u00b79":[272],"concentrations":[278],"(9\u201315":[281],"mol":[282],"m\u22123)":[283],"cytoplasmic":[286],"compartment":[287],"roots.":[290],"relevance":[292],"variable":[294],"models":[299],"regulation":[302],"is":[306],"discussed.":[307]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":6}],"updated_date":"2026-11-10T11:39:43.021295","created_date":"2016-06-24T00:00:00"}
