OrangerV1, Main, Exploration, bibRecord, 001F87

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

Identifieur interne : 001F87 ( Main/Exploration ); précédent : 001F86; suivant : 001F88

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

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

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.
Wicri :
- topic : Zone tropicale, Ratio, Botanique, Potassium, Fruit tropical.

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.

Affiliations:

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Caesium, potassium and ammonium distributions in different organs of tropical plants</title>
<author><name sortKey="Anjos, R M" sort="Anjos, R M" uniqKey="Anjos R" first="R. M." last="Anjos">R. M. Anjos</name>
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<author><name sortKey="Sanches, N" sort="Sanches, N" uniqKey="Sanches N" first="N." last="Sanches">N. Sanches</name>
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<author><name sortKey="Cambui, C A" sort="Cambui, C A" uniqKey="Cambui C" first="C. A." last="Cambui">C. A. Cambui</name>
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<author><name sortKey="Mercier, H" sort="Mercier, H" uniqKey="Mercier H" first="H." last="Mercier">H. Mercier</name>
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<series><title level="j" type="main">Environmental and experimental botany</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ammonium</term>
<term>Botany</term>
<term>Cesium</term>
<term>Cesium Isotopes</term>
<term>Concentration</term>
<term>Discrimination</term>
<term>Distribution</term>
<term>Fruit tree</term>
<term>Organ</term>
<term>Plant ecology</term>
<term>Potassium</term>
<term>Radioisotope</term>
<term>Ratio</term>
<term>Tropical fruit</term>
<term>Tropical zone</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Césium</term>
<term>Distribution</term>
<term>Organe</term>
<term>Zone tropicale</term>
<term>Arbre fruitier</term>
<term>Concentration</term>
<term>Ratio</term>
<term>Discrimination</term>
<term>Botanique</term>
<term>Potassium</term>
<term>Ammonium</term>
<term>Fruit tropical</term>
<term>Radioisotope</term>
<term>Césium Isotope</term>
<term><<>></term>
<term>Ecologie végétale</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Zone tropicale</term>
<term>Ratio</term>
<term>Botanique</term>
<term>Potassium</term>
<term>Fruit tropical</term>
</keywords>
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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>
</front>
</TEI>
<affiliations><list><country><li>Brésil</li>
</country>
<region><li>État de Rio de Janeiro</li>
<li>État de São Paulo</li>
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<settlement><li>São Paulo</li>
</settlement>
<orgName><li>Université de São Paulo</li>
</orgName>
</list>
<tree><country name="Brésil"><region name="État de Rio de Janeiro"><name sortKey="Anjos, R M" sort="Anjos, R M" uniqKey="Anjos R" first="R. M." last="Anjos">R. M. Anjos</name>
</region>
<name sortKey="Cambui, C A" sort="Cambui, C A" uniqKey="Cambui C" first="C. A." last="Cambui">C. A. Cambui</name>
<name sortKey="Mercier, H" sort="Mercier, H" uniqKey="Mercier H" first="H." last="Mercier">H. Mercier</name>
<name sortKey="Mosquera, B" sort="Mosquera, B" uniqKey="Mosquera B" first="B." last="Mosquera">B. Mosquera</name>
<name sortKey="Sanches, N" sort="Sanches, N" uniqKey="Sanches N" first="N." last="Sanches">N. Sanches</name>
</country>
</tree>
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</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

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

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