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Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1

Plant Growth-Promoting Bacteria (PGPB) of the genus Azospirillum are known to enhance root growth and yield in many plant species including cereals. To probe the underlying mechanisms, correlations between modifications of yield and 6-leaf plantlet characteristics were estimated on maize in four fie...

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Autores principales: Rozier, Camille, Hamzaoui, Jihane, Lemoine, Damien, Czarnes, Sonia, Legendre, Laurent
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5547117/
https://www.ncbi.nlm.nih.gov/pubmed/28785036
http://dx.doi.org/10.1038/s41598-017-07929-8
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author Rozier, Camille
Hamzaoui, Jihane
Lemoine, Damien
Czarnes, Sonia
Legendre, Laurent
author_facet Rozier, Camille
Hamzaoui, Jihane
Lemoine, Damien
Czarnes, Sonia
Legendre, Laurent
author_sort Rozier, Camille
collection PubMed
description Plant Growth-Promoting Bacteria (PGPB) of the genus Azospirillum are known to enhance root growth and yield in many plant species including cereals. To probe the underlying mechanisms, correlations between modifications of yield and 6-leaf plantlet characteristics were estimated on maize in four fields with contrasting soil properties over two consecutive years using the commercial isolate A. lipoferum CRT1. In both years, plantlet metabolome, photosynthetic potential and organ morphology were found to display field- and inoculation-specific signatures. Metabolomic analyses revealed that A. lipoferum CRT1 mostly affected sugar metabolism with no suggested impact on N and P assimilation. Mineral nitrogen feeding increased yield but did not affect yield enhancement by the bacterial partner. However, greater improvements of leaf photosynthetic potential correlated with yield diminutions and larger plantlets in all of their proportions correlated with yield enhancements. Bacterial inoculation restored proper seed-to-adult plant ratio when it accidentally dropped below 80%. Only in these cases did it raise yield. All in all, securing mature plant density is hypothesized as being the primary driver of A. lipoferum CRT1-mediated yield enhancement in maize fields.
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spelling pubmed-55471172017-08-09 Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1 Rozier, Camille Hamzaoui, Jihane Lemoine, Damien Czarnes, Sonia Legendre, Laurent Sci Rep Article Plant Growth-Promoting Bacteria (PGPB) of the genus Azospirillum are known to enhance root growth and yield in many plant species including cereals. To probe the underlying mechanisms, correlations between modifications of yield and 6-leaf plantlet characteristics were estimated on maize in four fields with contrasting soil properties over two consecutive years using the commercial isolate A. lipoferum CRT1. In both years, plantlet metabolome, photosynthetic potential and organ morphology were found to display field- and inoculation-specific signatures. Metabolomic analyses revealed that A. lipoferum CRT1 mostly affected sugar metabolism with no suggested impact on N and P assimilation. Mineral nitrogen feeding increased yield but did not affect yield enhancement by the bacterial partner. However, greater improvements of leaf photosynthetic potential correlated with yield diminutions and larger plantlets in all of their proportions correlated with yield enhancements. Bacterial inoculation restored proper seed-to-adult plant ratio when it accidentally dropped below 80%. Only in these cases did it raise yield. All in all, securing mature plant density is hypothesized as being the primary driver of A. lipoferum CRT1-mediated yield enhancement in maize fields. Nature Publishing Group UK 2017-08-07 /pmc/articles/PMC5547117/ /pubmed/28785036 http://dx.doi.org/10.1038/s41598-017-07929-8 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Rozier, Camille
Hamzaoui, Jihane
Lemoine, Damien
Czarnes, Sonia
Legendre, Laurent
Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title_full Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title_fullStr Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title_full_unstemmed Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title_short Field-based assessment of the mechanism of maize yield enhancement by Azospirillum lipoferum CRT1
title_sort field-based assessment of the mechanism of maize yield enhancement by azospirillum lipoferum crt1
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5547117/
https://www.ncbi.nlm.nih.gov/pubmed/28785036
http://dx.doi.org/10.1038/s41598-017-07929-8
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