Efficiency of nitrate uptake in spinach: impact of external nitrate concentration and relative growth rate on nitrate influx and efflux
Regulation of nitrate influx and efflux in spinach (Spinacia oleracea L., cv. Subito), was studied in short-term label experiments with ¹³N-and ¹⁵N-nitrate. Nitrate fluxes were examined in relation to the N demand for growth, defined as relative growth rate (RGR) times plant N concentration. Plants...
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| Veröffentlicht in: | Plant and soil 1999, Vol.208 (1), p.125-134 |
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| creator | Steege, M.W. ter (Groningen Univ., Haren (Netherlands). Dept. of Plant Biology) Stulen, I Wiersema, P.K Posthumus, F Vaalburg, W |
| description | Regulation of nitrate influx and efflux in spinach (Spinacia oleracea L., cv. Subito), was studied in short-term label experiments with ¹³N-and ¹⁵N-nitrate. Nitrate fluxes were examined in relation to the N demand for growth, defined as relative growth rate (RGR) times plant N concentration. Plants were grown at different nitrate concentrations (0.8 and 4 mM), with mineral composition of growth and uptake solutions identical. Nitrate influx, efflux and net nitrate uptake rate (NNUR) were independent of the external nitrate concentration, despite differences in internal nitrate concentration. At both N regimes, NNUR was adequate to meet the N demand for growth. RGR-related signals predominantly determined the nitrate fluxes. At high RGR (0.25 g g⁻¹ day⁻¹), nitrate influx was 20 to 40% lower and nitrate efflux was 50 to 70% lower than at lower RGR (0.17 g g⁻¹ day⁻¹); efflux: influx ratio (E:I) declined from 0.5 at low RGR to 0.2 at higher RGR. Thus, the efficiency of NNUR substantially increased with increasing RGR. Differences in nitrate translocation between morning and afternoon coincided with differences in nitrate efflux, which is in accordance with the suggested regulation of nitrate efflux by the root cytoplasmic nitrate concentration. |
| doi_str_mv | 10.1023/a:1004585200558 |
| format | Article |
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Dept. of Plant Biology) ; Stulen, I ; Wiersema, P.K ; Posthumus, F ; Vaalburg, W</creator><creatorcontrib>Steege, M.W. ter (Groningen Univ., Haren (Netherlands). Dept. of Plant Biology) ; Stulen, I ; Wiersema, P.K ; Posthumus, F ; Vaalburg, W</creatorcontrib><description>Regulation of nitrate influx and efflux in spinach (Spinacia oleracea L., cv. Subito), was studied in short-term label experiments with ¹³N-and ¹⁵N-nitrate. Nitrate fluxes were examined in relation to the N demand for growth, defined as relative growth rate (RGR) times plant N concentration. Plants were grown at different nitrate concentrations (0.8 and 4 mM), with mineral composition of growth and uptake solutions identical. Nitrate influx, efflux and net nitrate uptake rate (NNUR) were independent of the external nitrate concentration, despite differences in internal nitrate concentration. At both N regimes, NNUR was adequate to meet the N demand for growth. RGR-related signals predominantly determined the nitrate fluxes. At high RGR (0.25 g g⁻¹ day⁻¹), nitrate influx was 20 to 40% lower and nitrate efflux was 50 to 70% lower than at lower RGR (0.17 g g⁻¹ day⁻¹); efflux: influx ratio (E:I) declined from 0.5 at low RGR to 0.2 at higher RGR. Thus, the efficiency of NNUR substantially increased with increasing RGR. Differences in nitrate translocation between morning and afternoon coincided with differences in nitrate efflux, which is in accordance with the suggested regulation of nitrate efflux by the root cytoplasmic nitrate concentration.</description><identifier>ISSN: 0032-079X</identifier><identifier>EISSN: 1573-5036</identifier><identifier>DOI: 10.1023/a:1004585200558</identifier><identifier>CODEN: PLSOA2</identifier><language>eng</language><publisher>Dordrecht: Kluwer Academic Publishers</publisher><subject>ABSORCION DE SUSTANCIAS NUTRITIVAS ; ABSORPTION DE SUBSTANCES NUTRITIVES ; Absorption. Translocation of ions and substances. Permeability ; Agronomy. Soil science and plant productions ; Barley ; Biological and medical sciences ; Economic plant physiology ; Efficiency ; Fundamental and applied biological sciences. Psychology ; GROWTH RATE ; INDICE DE CRECIMIENTO ; Mineral composition ; NITRATE ; NITRATES ; NITRATOS ; Nitrogen ; NUTRIENT UPTAKE ; Nutrition. Photosynthesis. Respiration. Metabolism ; Physiological regulation ; Plant growth ; Plant growth regulators ; Plant physiology and development ; Plant roots ; Plants ; Sowing ; Spinach ; SPINACIA OLERACEA ; TAUX DE CROISSANCE ; Translocation ; Water and solutes. Absorption, translocation and permeability</subject><ispartof>Plant and soil, 1999, Vol.208 (1), p.125-134</ispartof><rights>1999 Kluwer Academic Publishers</rights><rights>1999 INIST-CNRS</rights><rights>Kluwer Academic Publishers 1999</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c365t-7b35d47155d14b82e9b45fb2961e11503f0861cee396c634b9c3343b6978d103</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/42949496$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/42949496$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,4021,27921,27922,27923,58015,58248</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1891731$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Steege, M.W. ter (Groningen Univ., Haren (Netherlands). Dept. of Plant Biology)</creatorcontrib><creatorcontrib>Stulen, I</creatorcontrib><creatorcontrib>Wiersema, P.K</creatorcontrib><creatorcontrib>Posthumus, F</creatorcontrib><creatorcontrib>Vaalburg, W</creatorcontrib><title>Efficiency of nitrate uptake in spinach: impact of external nitrate concentration and relative growth rate on nitrate influx and efflux</title><title>Plant and soil</title><description>Regulation of nitrate influx and efflux in spinach (Spinacia oleracea L., cv. Subito), was studied in short-term label experiments with ¹³N-and ¹⁵N-nitrate. Nitrate fluxes were examined in relation to the N demand for growth, defined as relative growth rate (RGR) times plant N concentration. Plants were grown at different nitrate concentrations (0.8 and 4 mM), with mineral composition of growth and uptake solutions identical. Nitrate influx, efflux and net nitrate uptake rate (NNUR) were independent of the external nitrate concentration, despite differences in internal nitrate concentration. At both N regimes, NNUR was adequate to meet the N demand for growth. RGR-related signals predominantly determined the nitrate fluxes. At high RGR (0.25 g g⁻¹ day⁻¹), nitrate influx was 20 to 40% lower and nitrate efflux was 50 to 70% lower than at lower RGR (0.17 g g⁻¹ day⁻¹); efflux: influx ratio (E:I) declined from 0.5 at low RGR to 0.2 at higher RGR. Thus, the efficiency of NNUR substantially increased with increasing RGR. Differences in nitrate translocation between morning and afternoon coincided with differences in nitrate efflux, which is in accordance with the suggested regulation of nitrate efflux by the root cytoplasmic nitrate concentration.</description><subject>ABSORCION DE SUSTANCIAS NUTRITIVAS</subject><subject>ABSORPTION DE SUBSTANCES NUTRITIVES</subject><subject>Absorption. Translocation of ions and substances. Permeability</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Barley</subject><subject>Biological and medical sciences</subject><subject>Economic plant physiology</subject><subject>Efficiency</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>GROWTH RATE</subject><subject>INDICE DE CRECIMIENTO</subject><subject>Mineral composition</subject><subject>NITRATE</subject><subject>NITRATES</subject><subject>NITRATOS</subject><subject>Nitrogen</subject><subject>NUTRIENT UPTAKE</subject><subject>Nutrition. Photosynthesis. Respiration. Metabolism</subject><subject>Physiological regulation</subject><subject>Plant growth</subject><subject>Plant growth regulators</subject><subject>Plant physiology and development</subject><subject>Plant roots</subject><subject>Plants</subject><subject>Sowing</subject><subject>Spinach</subject><subject>SPINACIA OLERACEA</subject><subject>TAUX DE CROISSANCE</subject><subject>Translocation</subject><subject>Water and solutes. 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Psychology</topic><topic>GROWTH RATE</topic><topic>INDICE DE CRECIMIENTO</topic><topic>Mineral composition</topic><topic>NITRATE</topic><topic>NITRATES</topic><topic>NITRATOS</topic><topic>Nitrogen</topic><topic>NUTRIENT UPTAKE</topic><topic>Nutrition. Photosynthesis. Respiration. Metabolism</topic><topic>Physiological regulation</topic><topic>Plant growth</topic><topic>Plant growth regulators</topic><topic>Plant physiology and development</topic><topic>Plant roots</topic><topic>Plants</topic><topic>Sowing</topic><topic>Spinach</topic><topic>SPINACIA OLERACEA</topic><topic>TAUX DE CROISSANCE</topic><topic>Translocation</topic><topic>Water and solutes. Absorption, translocation and permeability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Steege, M.W. ter (Groningen Univ., Haren (Netherlands). 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Dept. of Plant Biology)</au><au>Stulen, I</au><au>Wiersema, P.K</au><au>Posthumus, F</au><au>Vaalburg, W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Efficiency of nitrate uptake in spinach: impact of external nitrate concentration and relative growth rate on nitrate influx and efflux</atitle><jtitle>Plant and soil</jtitle><date>1999</date><risdate>1999</risdate><volume>208</volume><issue>1</issue><spage>125</spage><epage>134</epage><pages>125-134</pages><issn>0032-079X</issn><eissn>1573-5036</eissn><coden>PLSOA2</coden><abstract>Regulation of nitrate influx and efflux in spinach (Spinacia oleracea L., cv. Subito), was studied in short-term label experiments with ¹³N-and ¹⁵N-nitrate. Nitrate fluxes were examined in relation to the N demand for growth, defined as relative growth rate (RGR) times plant N concentration. Plants were grown at different nitrate concentrations (0.8 and 4 mM), with mineral composition of growth and uptake solutions identical. Nitrate influx, efflux and net nitrate uptake rate (NNUR) were independent of the external nitrate concentration, despite differences in internal nitrate concentration. At both N regimes, NNUR was adequate to meet the N demand for growth. RGR-related signals predominantly determined the nitrate fluxes. At high RGR (0.25 g g⁻¹ day⁻¹), nitrate influx was 20 to 40% lower and nitrate efflux was 50 to 70% lower than at lower RGR (0.17 g g⁻¹ day⁻¹); efflux: influx ratio (E:I) declined from 0.5 at low RGR to 0.2 at higher RGR. Thus, the efficiency of NNUR substantially increased with increasing RGR. Differences in nitrate translocation between morning and afternoon coincided with differences in nitrate efflux, which is in accordance with the suggested regulation of nitrate efflux by the root cytoplasmic nitrate concentration.</abstract><cop>Dordrecht</cop><pub>Kluwer Academic Publishers</pub><doi>10.1023/a:1004585200558</doi><tpages>10</tpages></addata></record> |
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| ispartof | Plant and soil, 1999, Vol.208 (1), p.125-134 |
| issn | 0032-079X 1573-5036 |
| language | eng |
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| source | JSTOR Archive Collection A-Z Listing; SpringerLink Journals - AutoHoldings |
| subjects | ABSORCION DE SUSTANCIAS NUTRITIVAS ABSORPTION DE SUBSTANCES NUTRITIVES Absorption. Translocation of ions and substances. Permeability Agronomy. Soil science and plant productions Barley Biological and medical sciences Economic plant physiology Efficiency Fundamental and applied biological sciences. Psychology GROWTH RATE INDICE DE CRECIMIENTO Mineral composition NITRATE NITRATES NITRATOS Nitrogen NUTRIENT UPTAKE Nutrition. Photosynthesis. Respiration. Metabolism Physiological regulation Plant growth Plant growth regulators Plant physiology and development Plant roots Plants Sowing Spinach SPINACIA OLERACEA TAUX DE CROISSANCE Translocation Water and solutes. Absorption, translocation and permeability |
| title | Efficiency of nitrate uptake in spinach: impact of external nitrate concentration and relative growth rate on nitrate influx and efflux |
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