Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features
Crotalaria are plants of the Fabaceae family whose nodulation characteristics have been little explored despite the recent discovery of their unexpected ability to be efficiently nodulated in symbiosis with bacteria of the genus Methylobacterium. It has been shown that methylotrophy plays a key role in this unusual symbiotic system, as it is expressed within the nodule and as non-methylotroph mutants had a depleting effect on plant growth response. Within the nodule, Methylobacterium is thus able to obtain carbon both from host plant photosynthesis and from methylotrophy. In this context, the aim of the present study was to show the histological and cytological impacts of both symbiotic and methylotrophic metabolism within Crotalaria podocarpa nodules. It was established that if Crotalaria nodules are multilobed, each lobe has the morphology of indeterminate nodules but with a different anatomy; that is, without root hair infection or infection threads. In the fixation zone, bacteroids display a spherical shape and there is no uninfected cell. Crotalaria nodulation by Methylobacterium displayed some very unusual characteristics such as starch storage within bacteroid-filled cells of the fixation zone and also the complete lysis of apical nodular tissues (where bacteria have a free-living shape and express methylotrophy). This lysis could possibly reflect the bacterial degradation of plant wall pectins through bacterial pectin methyl esterases, thus producing methanol as a substrate, allowing bacterial multiplication before release from the nodule.
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Subjects: | F62 - Physiologie végétale - Croissance et développement, F01 - Culture des plantes, Crotalaria, Rhizobactérie, http://aims.fao.org/aos/agrovoc/c_1977, http://aims.fao.org/aos/agrovoc/c_25068, http://aims.fao.org/aos/agrovoc/c_6970, |
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dig-cirad-fr-5607152022-12-30T18:33:45Z http://agritrop.cirad.fr/560715/ http://agritrop.cirad.fr/560715/ Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features. Renier Adeline, De Faria Sergio Miana, Jourand Philippe, Giraud Eric, Dreyfus Bernard, Rapior Sylvie, Prin Yves. 2011. Journal of Experimental Botany, 62 (10) : 3693-3697.https://doi.org/10.1093/jxb/err083 <https://doi.org/10.1093/jxb/err083> Researchers Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features Renier, Adeline De Faria, Sergio Miana Jourand, Philippe Giraud, Eric Dreyfus, Bernard Rapior, Sylvie Prin, Yves eng 2011 Journal of Experimental Botany F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 Sénégal http://aims.fao.org/aos/agrovoc/c_6970 Crotalaria are plants of the Fabaceae family whose nodulation characteristics have been little explored despite the recent discovery of their unexpected ability to be efficiently nodulated in symbiosis with bacteria of the genus Methylobacterium. It has been shown that methylotrophy plays a key role in this unusual symbiotic system, as it is expressed within the nodule and as non-methylotroph mutants had a depleting effect on plant growth response. Within the nodule, Methylobacterium is thus able to obtain carbon both from host plant photosynthesis and from methylotrophy. In this context, the aim of the present study was to show the histological and cytological impacts of both symbiotic and methylotrophic metabolism within Crotalaria podocarpa nodules. It was established that if Crotalaria nodules are multilobed, each lobe has the morphology of indeterminate nodules but with a different anatomy; that is, without root hair infection or infection threads. In the fixation zone, bacteroids display a spherical shape and there is no uninfected cell. Crotalaria nodulation by Methylobacterium displayed some very unusual characteristics such as starch storage within bacteroid-filled cells of the fixation zone and also the complete lysis of apical nodular tissues (where bacteria have a free-living shape and express methylotrophy). This lysis could possibly reflect the bacterial degradation of plant wall pectins through bacterial pectin methyl esterases, thus producing methanol as a substrate, allowing bacterial multiplication before release from the nodule. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/560715/1/document_560715.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1093/jxb/err083 10.1093/jxb/err083 info:eu-repo/semantics/altIdentifier/doi/10.1093/jxb/err083 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1093/jxb/err083 |
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F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 http://aims.fao.org/aos/agrovoc/c_6970 F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 http://aims.fao.org/aos/agrovoc/c_6970 |
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F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 http://aims.fao.org/aos/agrovoc/c_6970 F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 http://aims.fao.org/aos/agrovoc/c_6970 Renier, Adeline De Faria, Sergio Miana Jourand, Philippe Giraud, Eric Dreyfus, Bernard Rapior, Sylvie Prin, Yves Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
description |
Crotalaria are plants of the Fabaceae family whose nodulation characteristics have been little explored despite the recent discovery of their unexpected ability to be efficiently nodulated in symbiosis with bacteria of the genus Methylobacterium. It has been shown that methylotrophy plays a key role in this unusual symbiotic system, as it is expressed within the nodule and as non-methylotroph mutants had a depleting effect on plant growth response. Within the nodule, Methylobacterium is thus able to obtain carbon both from host plant photosynthesis and from methylotrophy. In this context, the aim of the present study was to show the histological and cytological impacts of both symbiotic and methylotrophic metabolism within Crotalaria podocarpa nodules. It was established that if Crotalaria nodules are multilobed, each lobe has the morphology of indeterminate nodules but with a different anatomy; that is, without root hair infection or infection threads. In the fixation zone, bacteroids display a spherical shape and there is no uninfected cell. Crotalaria nodulation by Methylobacterium displayed some very unusual characteristics such as starch storage within bacteroid-filled cells of the fixation zone and also the complete lysis of apical nodular tissues (where bacteria have a free-living shape and express methylotrophy). This lysis could possibly reflect the bacterial degradation of plant wall pectins through bacterial pectin methyl esterases, thus producing methanol as a substrate, allowing bacterial multiplication before release from the nodule. |
format |
article |
topic_facet |
F62 - Physiologie végétale - Croissance et développement F01 - Culture des plantes Crotalaria Rhizobactérie http://aims.fao.org/aos/agrovoc/c_1977 http://aims.fao.org/aos/agrovoc/c_25068 http://aims.fao.org/aos/agrovoc/c_6970 |
author |
Renier, Adeline De Faria, Sergio Miana Jourand, Philippe Giraud, Eric Dreyfus, Bernard Rapior, Sylvie Prin, Yves |
author_facet |
Renier, Adeline De Faria, Sergio Miana Jourand, Philippe Giraud, Eric Dreyfus, Bernard Rapior, Sylvie Prin, Yves |
author_sort |
Renier, Adeline |
title |
Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
title_short |
Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
title_full |
Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
title_fullStr |
Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
title_full_unstemmed |
Nodulation of Crotalaria podocarpa DC. by Methylobacterium nodulans displays very unusual features |
title_sort |
nodulation of crotalaria podocarpa dc. by methylobacterium nodulans displays very unusual features |
url |
http://agritrop.cirad.fr/560715/ http://agritrop.cirad.fr/560715/1/document_560715.pdf |
work_keys_str_mv |
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