OrangerV1, PascalFrancis, Corpus, bibRecord, 000335

Caesium, potassium and ammonium distributions in different organs of tropical plants

Identifieur interne : 000335 ( PascalFrancis/Corpus ); précédent : 000334; suivant : 000336

Caesium, potassium and ammonium distributions in different organs of tropical plants

Auteurs : R. M. Anjos ; B. Mosquera ; N. Sanches ; C. A. Cambui ; H. Mercier

Source :

Environmental and experimental botany [ 0098-8472 ] ; 2009.

RBID : Pascal:09-0153860

Descripteurs français

Pascal (Inist)
- Césium, Distribution, Organe, Zone tropicale, Arbre fruitier, Concentration, Ratio, Discrimination, Botanique, Potassium, Ammonium, Fruit tropical, Radioisotope, Césium Isotope, <<>>, Ecologie végétale.

English descriptors

KwdEn :
- Ammonium, Botany, Cesium, Cesium Isotopes, Concentration, Discrimination, Distribution, Fruit tree, Organ, Plant ecology, Potassium, Radioisotope, Ratio, Tropical fruit, Tropical zone.

Abstract

In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K⁺) and ammonium (NH₄⁺). We present the results for the distributions of ¹³⁷Cs,⁴⁰K and NH₄⁺ from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of ¹³⁷Cs and ⁴⁰K were measured by gamma spectrometry and concentrations of free NH₄⁺ ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of ¹³⁷Cs and ⁴⁰K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for ⁴⁰K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, ¹³⁷Cs was not well correlated with NH₄⁺. Significant temporal changes in the NH₄⁺ concentrations were observed during the development of fruits, while the ¹³⁷Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs⁺ and free NH₄⁺ ions could have distinct concentration ratios for each particular plant organ.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A05				`@2 65`
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A08	`01`	`1`	`ENG`	`@1 Caesium, potassium and ammonium distributions in different organs of tropical plants`
A11	`01`	`1`		`@1 ANJOS (R. M.)`
A11	`02`	`1`		`@1 MOSQUERA (B.)`
A11	`03`	`1`		`@1 SANCHES (N.)`
A11	`04`	`1`		`@1 CAMBUI (C. A.)`
A11	`05`	`1`		`@1 MERCIER (H.)`
A14	`01`			`@1 Instituto de Física, Universidade Federal Fluminense, Av. Cal. Milton Tavares de Souza s/n, Gragoatá @2 Niterói Cep 24210-346, RJ @3 BRA @Z 1 aut. @Z 2 aut. @Z 3 aut.`
A14	`02`			`@1 Instituto de Biociências, Universidade de São Paulo, Caixa-Postal 11461 @2 São Paulo Cep 05422-970, SP @3 BRA @Z 4 aut. @Z 5 aut.`
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A23	`01`			`@0 ENG`
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A44				`@0 0000 @1 © 2009 INIST-CNRS. All rights reserved.`
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A64	`01`	`1`		`@0 Environmental and experimental botany`
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C01	`01`		`ENG`	@0 In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K⁺) and ammonium (NH₄⁺). We present the results for the distributions of ¹³⁷Cs,⁴⁰K and NH₄⁺ from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of ¹³⁷Cs and ⁴⁰K were measured by gamma spectrometry and concentrations of free NH₄⁺ ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of ¹³⁷Cs and ⁴⁰K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for ⁴⁰K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, ¹³⁷Cs was not well correlated with NH₄⁺. Significant temporal changes in the NH₄⁺ concentrations were observed during the development of fruits, while the ¹³⁷Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs⁺ and free NH₄⁺ ions could have distinct concentration ratios for each particular plant organ.
C02	`01`	`X`		`@0 002A`
C03	`01`	`X`	`FRE`	`@0 Césium @2 NC @5 01`
C03	`01`	`X`	`ENG`	`@0 Cesium @2 NC @5 01`
C03	`01`	`X`	`SPA`	`@0 Cesio @2 NC @5 01`
C03	`02`	`X`	`FRE`	`@0 Distribution @5 02`
C03	`02`	`X`	`ENG`	`@0 Distribution @5 02`
C03	`02`	`X`	`SPA`	`@0 Distribución @5 02`
C03	`03`	`X`	`FRE`	`@0 Organe @5 03`
C03	`03`	`X`	`ENG`	`@0 Organ @5 03`
C03	`03`	`X`	`SPA`	`@0 Organo @5 03`
C03	`04`	`X`	`FRE`	`@0 Zone tropicale @5 04`
C03	`04`	`X`	`ENG`	`@0 Tropical zone @5 04`
C03	`04`	`X`	`SPA`	`@0 Zona tropical @5 04`
C03	`05`	`X`	`FRE`	`@0 Arbre fruitier @5 05`
C03	`05`	`X`	`ENG`	`@0 Fruit tree @5 05`
C03	`05`	`X`	`SPA`	`@0 Arbol frutal @5 05`
C03	`06`	`X`	`FRE`	`@0 Concentration @5 06`
C03	`06`	`X`	`ENG`	`@0 Concentration @5 06`
C03	`06`	`X`	`SPA`	`@0 Concentración @5 06`
C03	`07`	`X`	`FRE`	`@0 Ratio @5 07`
C03	`07`	`X`	`ENG`	`@0 Ratio @5 07`
C03	`07`	`X`	`SPA`	`@0 Ratio @5 07`
C03	`08`	`X`	`FRE`	`@0 Discrimination @5 08`
C03	`08`	`X`	`ENG`	`@0 Discrimination @5 08`
C03	`08`	`X`	`SPA`	`@0 Discriminación @5 08`
C03	`09`	`X`	`FRE`	`@0 Botanique @5 09`
C03	`09`	`X`	`ENG`	`@0 Botany @5 09`
C03	`09`	`X`	`SPA`	`@0 Botánica @5 09`
C03	`10`	`X`	`FRE`	`@0 Potassium @2 NC @2 FR @5 15`
C03	`10`	`X`	`ENG`	`@0 Potassium @2 NC @2 FR @5 15`
C03	`10`	`X`	`SPA`	`@0 Potasio @2 NC @2 FR @5 15`
C03	`11`	`X`	`FRE`	`@0 Ammonium @2 NC @5 16`
C03	`11`	`X`	`ENG`	`@0 Ammonium @2 NC @5 16`
C03	`11`	`X`	`SPA`	`@0 Amonio @2 NC @5 16`
C03	`12`	`X`	`FRE`	`@0 Fruit tropical @5 17`
C03	`12`	`X`	`ENG`	`@0 Tropical fruit @5 17`
C03	`12`	`X`	`SPA`	`@0 Fruta tropical @5 17`
C03	`13`	`X`	`FRE`	`@0 Radioisotope @5 18`
C03	`13`	`X`	`ENG`	`@0 Radioisotope @5 18`
C03	`13`	`X`	`SPA`	`@0 Radionúclido @5 18`
C03	`14`	`X`	`FRE`	`@0 Césium Isotope @2 NC @2 NA @5 19`
C03	`14`	`X`	`ENG`	`@0 Cesium Isotopes @2 NC @2 NA @5 19`
C03	`14`	`X`	`SPA`	`@0 Cesio Isótopo @2 NC @2 NA @5 19`
C03	`15`	`X`	`FRE`	`@0 <<>> @4 INC @5 68`
C03	`16`	`X`	`FRE`	`@0 Ecologie végétale @4 CD @5 96`
C03	`16`	`X`	`ENG`	`@0 Plant ecology @4 CD @5 96`
C03	`16`	`X`	`SPA`	`@0 Ecología vegetal @4 CD @5 96`
N21				`@1 110`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 09-0153860 INIST
ET :	Caesium, potassium and ammonium distributions in different organs of tropical plants
AU :	ANJOS (R. M.); MOSQUERA (B.); SANCHES (N.); CAMBUI (C. A.); MERCIER (H.)
AF :	Instituto de Física, Universidade Federal Fluminense, Av. Cal. Milton Tavares de Souza s/n, Gragoatá/Niterói Cep 24210-346, RJ/Brésil (1 aut., 2 aut., 3 aut.); Instituto de Biociências, Universidade de São Paulo, Caixa-Postal 11461/São Paulo Cep 05422-970, SP/Brésil (4 aut., 5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Environmental and experimental botany; ISSN 0098-8472; Coden EEBODM; Pays-Bas; Da. 2009; Vol. 65; No. 1; Pp. 111-118; Bibl. 1/2 p.
LA :	Anglais
EA :	In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K⁺) and ammonium (NH₄⁺). We present the results for the distributions of ¹³⁷Cs,⁴⁰K and NH₄⁺ from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of ¹³⁷Cs and ⁴⁰K were measured by gamma spectrometry and concentrations of free NH₄⁺ ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of ¹³⁷Cs and ⁴⁰K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for ⁴⁰K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, ¹³⁷Cs was not well correlated with NH₄⁺. Significant temporal changes in the NH₄⁺ concentrations were observed during the development of fruits, while the ¹³⁷Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs⁺ and free NH₄⁺ ions could have distinct concentration ratios for each particular plant organ.
CC :	002A
FD :	Césium; Distribution; Organe; Zone tropicale; Arbre fruitier; Concentration; Ratio; Discrimination; Botanique; Potassium; Ammonium; Fruit tropical; Radioisotope; Césium Isotope; <<>>; Ecologie végétale
ED :	Cesium; Distribution; Organ; Tropical zone; Fruit tree; Concentration; Ratio; Discrimination; Botany; Potassium; Ammonium; Tropical fruit; Radioisotope; Cesium Isotopes; Plant ecology
SD :	Cesio; Distribución; Organo; Zona tropical; Arbol frutal; Concentración; Ratio; Discriminación; Botánica; Potasio; Amonio; Fruta tropical; Radionúclido; Cesio Isótopo; Ecología vegetal
LO :	INIST-9462.354000185550790140
ID :	09-0153860

Links to Exploration step

Pascal:09-0153860

Le document en format XML

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<term>Discrimination</term>
<term>Distribution</term>
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<term>Plant ecology</term>
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<front><div type="abstract" xml:lang="en">In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K<sup>+</sup>
) and ammonium (NH<sub>4</sub>
<sup>+</sup>
). We present the results for the distributions of <sup>137</sup>
Cs,<sup>40</sup>
K and NH<sub>4</sub>
<sup>+</sup>
 from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K were measured by gamma spectrometry and concentrations of free NH<sub>4</sub>
<sup>+</sup>
 ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for <sup>40</sup>
K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, <sup>137</sup>
Cs was not well correlated with NH<sub>4</sub>
<sup>+</sup>
. Significant temporal changes in the NH<sub>4</sub>
<sup>+</sup>
 concentrations were observed during the development of fruits, while the <sup>137</sup>
Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs<sup>+</sup>
 and free NH<sub>4</sub>
<sup>+</sup>
 ions could have distinct concentration ratios for each particular plant organ.</div>
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<fA66 i1="01"><s0>NLD</s0>
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<fC01 i1="01" l="ENG"><s0>In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K<sup>+</sup>
) and ammonium (NH<sub>4</sub>
<sup>+</sup>
). We present the results for the distributions of <sup>137</sup>
Cs,<sup>40</sup>
K and NH<sub>4</sub>
<sup>+</sup>
 from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K were measured by gamma spectrometry and concentrations of free NH<sub>4</sub>
<sup>+</sup>
 ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for <sup>40</sup>
K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, <sup>137</sup>
Cs was not well correlated with NH<sub>4</sub>
<sup>+</sup>
. Significant temporal changes in the NH<sub>4</sub>
<sup>+</sup>
 concentrations were observed during the development of fruits, while the <sup>137</sup>
Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs<sup>+</sup>
 and free NH<sub>4</sub>
<sup>+</sup>
 ions could have distinct concentration ratios for each particular plant organ.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>002A</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Césium</s0>
<s2>NC</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Cesium</s0>
<s2>NC</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Cesio</s0>
<s2>NC</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Distribution</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Distribution</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Distribución</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Organe</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Organ</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Organo</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Zone tropicale</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Tropical zone</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Zona tropical</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Arbre fruitier</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Fruit tree</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Arbol frutal</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Concentration</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Concentration</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Concentración</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Ratio</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Ratio</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Ratio</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Discrimination</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Discrimination</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Discriminación</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Botanique</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Botany</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Botánica</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Potassium</s0>
<s2>NC</s2>
<s2>FR</s2>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Potassium</s0>
<s2>NC</s2>
<s2>FR</s2>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Potasio</s0>
<s2>NC</s2>
<s2>FR</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Ammonium</s0>
<s2>NC</s2>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Ammonium</s0>
<s2>NC</s2>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Amonio</s0>
<s2>NC</s2>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Fruit tropical</s0>
<s5>17</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Tropical fruit</s0>
<s5>17</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Fruta tropical</s0>
<s5>17</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Radioisotope</s0>
<s5>18</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Radioisotope</s0>
<s5>18</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Radionúclido</s0>
<s5>18</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Césium Isotope</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>19</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Cesium Isotopes</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>19</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Cesio Isótopo</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>19</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0><<>></s0>
<s4>INC</s4>
<s5>68</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Ecologie végétale</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Plant ecology</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA"><s0>Ecología vegetal</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fN21><s1>110</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 09-0153860 INIST</NO>
<ET>Caesium, potassium and ammonium distributions in different organs of tropical plants</ET>
<AU>ANJOS (R. M.); MOSQUERA (B.); SANCHES (N.); CAMBUI (C. A.); MERCIER (H.)</AU>
<AF>Instituto de Física, Universidade Federal Fluminense, Av. Cal. Milton Tavares de Souza s/n, Gragoatá/Niterói Cep 24210-346, RJ/Brésil (1 aut., 2 aut., 3 aut.); Instituto de Biociências, Universidade de São Paulo, Caixa-Postal 11461/São Paulo Cep 05422-970, SP/Brésil (4 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Environmental and experimental botany; ISSN 0098-8472; Coden EEBODM; Pays-Bas; Da. 2009; Vol. 65; No. 1; Pp. 111-118; Bibl. 1/2 p.</SO>
<LA>Anglais</LA>
<EA>In the present work the distribution of ions in aboveground plant parts was studied in order to establish the suitability of using radiocaesium as a tracer for the plant absorption of nutrients, such as potassium (K<sup>+</sup>
) and ammonium (NH<sub>4</sub>
<sup>+</sup>
). We present the results for the distributions of <sup>137</sup>
Cs,<sup>40</sup>
K and NH<sub>4</sub>
<sup>+</sup>
 from four tropical plant species: lemon (Citrus aurantifolia), orange (Citrus sinensis), guava (Psidium guajava) and chili pepper (Capsicum frutescens). Activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K were measured by gamma spectrometry and concentrations of free NH<sub>4</sub>
<sup>+</sup>
 ions by a colorimetric method. Similarly to potassium and ammonium, caesium showed a high mobility within the plants, exhibiting the highest values of concentration in the growing parts of the tree (fruits, new leaves, twigs, and barks). A significant correlation between activity concentrations of <sup>137</sup>
Cs and <sup>40</sup>
K was observed in these tropical plants. The K/Cs discrimination ratios were approximately equal to unity in different compartments of each individual plant, suggesting that caesium could be a good tracer for <sup>40</sup>
K in tropical woody fruit species. Despite the similarity observed for the behaviour of caesium and ammonium in the newly grown plant compartments, <sup>137</sup>
Cs was not well correlated with NH<sub>4</sub>
<sup>+</sup>
. Significant temporal changes in the NH<sub>4</sub>
<sup>+</sup>
 concentrations were observed during the development of fruits, while the <sup>137</sup>
Cs activity concentration alterations were not of great importance, indicating, therefore, that Cs<sup>+</sup>
 and free NH<sub>4</sub>
<sup>+</sup>
 ions could have distinct concentration ratios for each particular plant organ.</EA>
<CC>002A</CC>
<FD>Césium; Distribution; Organe; Zone tropicale; Arbre fruitier; Concentration; Ratio; Discrimination; Botanique; Potassium; Ammonium; Fruit tropical; Radioisotope; Césium Isotope; <<>>; Ecologie végétale</FD>
<ED>Cesium; Distribution; Organ; Tropical zone; Fruit tree; Concentration; Ratio; Discrimination; Botany; Potassium; Ammonium; Tropical fruit; Radioisotope; Cesium Isotopes; Plant ecology</ED>
<SD>Cesio; Distribución; Organo; Zona tropical; Arbol frutal; Concentración; Ratio; Discriminación; Botánica; Potasio; Amonio; Fruta tropical; Radionúclido; Cesio Isótopo; Ecología vegetal</SD>
<LO>INIST-9462.354000185550790140</LO>
<ID>09-0153860</ID>
</server>
</inist>
</record>

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Caesium, potassium and ammonium distributions in different organs of tropical plants

Caesium, potassium and ammonium distributions in different organs of tropical plants

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