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Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Identifieur interne : 000022 ( Ncbi/Curation ); précédent : 000021; suivant : 000023

Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Auteurs : H. Zaid [Maroc] ; R. El Morabet [Maroc] ; H. G. Diem [France] ; M. Arahou [Maroc]

Source :

Annals of Botany [ 0305-7364 ] ; 2003.

RBID : PMC:4244850

Descripteurs français

KwdFr :
- Angiospermes (), Angiospermes (physiologie), Chlorures, Composés du fer III (pharmacologie), Facteur de croissance végétal (physiologie), Fer (déficit), Modèles biologiques, Racines de plante (), Racines de plante (physiologie), Éthylènes (antagonistes et inhibiteurs), Éthylènes (pharmacologie).
MESH :
- antagonistes et inhibiteurs : Éthylènes.
- déficit : Fer.
- pharmacologie : Composés du fer III, Éthylènes.
- physiologie : Angiospermes, Facteur de croissance végétal, Racines de plante.
- Angiospermes, Chlorures, Modèles biologiques, Racines de plante.

English descriptors

KwdEn :
- Angiosperms (drug effects), Angiosperms (physiology), Chlorides, Ethylenes (antagonists & inhibitors), Ethylenes (pharmacology), Ferric Compounds (pharmacology), Iron (deficiency), Models, Biological, Plant Growth Regulators (physiology), Plant Roots (drug effects), Plant Roots (physiology).
MESH :
- chemical , antagonists & inhibitors : Ethylenes.
- chemical , deficiency : Iron.
- chemical , pharmacology : Ethylenes, Ferric Compounds.
- chemical , physiology : Plant Growth Regulators.
- chemical : Chlorides.
- drug effects : Angiosperms, Plant Roots.
- physiology : Angiosperms, Plant Roots.
- Models, Biological.

Abstract

Casuarina glauca develops proteoid (cluster) roots in response to Fe deficiency. This study set out to investigate the possible involvement of ethylene in the initiation and/or the morphogenesis of cluster roots (CR). For this purpose, the effect of Ag⁺ added as silver thiosulfate, an inhibitor of ethylene action has been studied in plants growing hydroponically. No CR formation was observed in these growth conditions. Inhibition of ethylene biosynthesis by aminoethoxyvinylglycine, 1‐ aminoisobutyric acid, aminoxyacetic acid or cobalt chloride also eliminated the positive effect of Fe deficiency on CR formation in C. glauca. CR were not formed in Fe‐ deficient roots in the presence of ethylene inhibitors, suggesting a role for ethylene in the morphological responses to Fe deficiency. Interestingly, treatment of Casuarina plants with the ethylene precursor 1‐aminocyclopropane‐1‐carboxylic acid stimulated significantly the formation of CR, even if plants are supplied with Fe. However, this stimulation did not reach the level of CR obtained in Fe‐deficient plants. These results suggest that an ethylene‐mediated signalling pathway is involved in CR formation process in C. glauca.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4244850

DOI: 10.1093/aob/mcg186
PubMed: 12967908
PubMed Central: 4244850

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<term>Chlorides</term>
<term>Ethylenes (antagonists & inhibitors)</term>
<term>Ethylenes (pharmacology)</term>
<term>Ferric Compounds (pharmacology)</term>
<term>Iron (deficiency)</term>
<term>Models, Biological</term>
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<term>Plant Roots (physiology)</term>
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<term>Angiospermes (physiologie)</term>
<term>Chlorures</term>
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<term>Facteur de croissance végétal (physiologie)</term>
<term>Fer (déficit)</term>
<term>Modèles biologiques</term>
<term>Racines de plante ()</term>
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<keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Ethylenes</term>
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<keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Angiosperms</term>
<term>Plant Roots</term>
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<keywords scheme="MESH" qualifier="déficit" xml:lang="fr"><term>Fer</term>
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<front><div type="abstract" xml:lang="en"><p><italic>Casuarina glauca</italic>
 develops proteoid (cluster) roots in response to Fe deficiency. This study set out to investigate the possible involvement of ethylene in the initiation and/or the morphogenesis of cluster roots (CR). For this purpose, the effect of Ag<sup>+</sup>
 added as silver thiosulfate, an inhibitor of ethylene action has been studied in plants growing hydroponically. No CR formation was observed in these growth conditions. Inhibition of ethylene biosynthesis by aminoethoxyvinylglycine, 1‐ aminoisobutyric acid, aminoxyacetic acid or cobalt chloride also eliminated the positive effect of Fe deficiency on CR formation in <italic>C. glauca</italic>
. CR were not formed in Fe‐ deficient roots in the presence of ethylene inhibitors, suggesting a role for ethylene in the morphological responses to Fe deficiency. Interestingly, treatment of <italic>Casuarina</italic>
 plants with the ethylene precursor 1‐aminocyclopropane‐1‐carboxylic acid stimulated significantly the formation of CR, even if plants are supplied with Fe. However, this stimulation did not reach the level of CR obtained in Fe‐deficient plants. These results suggest that an ethylene‐mediated signalling pathway is involved in CR formation process in <italic>C. glauca</italic>
.</p>
</div>
</front>
</TEI>
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Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Source :

Descripteurs français

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Abstract

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