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Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds

Weeds, which have been the bane of agriculture since the beginning of civilization, are managed manually, mechanically, and, more recently, by chemicals. However, chemical control options are rapidly shrinking due to the recent rise in the number of herbicide-resistant weeds in crop fields, with few...

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Autores principales: Pandeya, Devendra, López-Arredondo, Damar L., Janga, Madhusudhana R., Campbell, LeAnne M., Estrella-Hernández, Priscila, Bagavathiannan, Muthukumar V., Herrera-Estrella, Luis, Rathore, Keerti S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6055188/
https://www.ncbi.nlm.nih.gov/pubmed/29866830
http://dx.doi.org/10.1073/pnas.1804862115
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author Pandeya, Devendra
López-Arredondo, Damar L.
Janga, Madhusudhana R.
Campbell, LeAnne M.
Estrella-Hernández, Priscila
Bagavathiannan, Muthukumar V.
Herrera-Estrella, Luis
Rathore, Keerti S.
author_facet Pandeya, Devendra
López-Arredondo, Damar L.
Janga, Madhusudhana R.
Campbell, LeAnne M.
Estrella-Hernández, Priscila
Bagavathiannan, Muthukumar V.
Herrera-Estrella, Luis
Rathore, Keerti S.
author_sort Pandeya, Devendra
collection PubMed
description Weeds, which have been the bane of agriculture since the beginning of civilization, are managed manually, mechanically, and, more recently, by chemicals. However, chemical control options are rapidly shrinking due to the recent rise in the number of herbicide-resistant weeds in crop fields, with few alternatives on the horizon. Therefore, there is an urgent need for alternative weed suppression systems to sustain crop productivity while reducing our dependence on herbicides and tillage. Such a development will also allay some of the negative perceptions associated with the use of herbicide-resistance genes and heavy dependence on herbicides. Transgenic plants expressing the bacterial phosphite dehydrogenase (ptxD) gene gain an ability to convert phosphite (Phi) into orthophosphate [Pi, the metabolizable form of phosphorus (P)]. Such plants allow for a selective fertilization scheme, based on Phi as the sole source of P for the crop, while offering an effective alternative for suppressing weed growth. Here, we show that, when P is supplied in the form of Phi, ptxD-expressing cotton (Gossypium hirsutum L.) plants outcompete, in both artificial substrates and natural soils from agricultural fields, three different monocot and dicot weed species intentionally introduced in the experiments, as well as weeds naturally present in the tested soils. Importantly, the ptxD/Phi system proved highly efficacious in inhibiting the growth of glyphosate-resistant Palmer amaranth. With over 250 weed species resistant to currently available herbicides, ptxD-transgenic plants fertilized with Phi could provide an effective alternative to suppressing the growth of these weeds while providing adequate nutrition to the crop.
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spelling pubmed-60551882018-07-24 Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds Pandeya, Devendra López-Arredondo, Damar L. Janga, Madhusudhana R. Campbell, LeAnne M. Estrella-Hernández, Priscila Bagavathiannan, Muthukumar V. Herrera-Estrella, Luis Rathore, Keerti S. Proc Natl Acad Sci U S A PNAS Plus Weeds, which have been the bane of agriculture since the beginning of civilization, are managed manually, mechanically, and, more recently, by chemicals. However, chemical control options are rapidly shrinking due to the recent rise in the number of herbicide-resistant weeds in crop fields, with few alternatives on the horizon. Therefore, there is an urgent need for alternative weed suppression systems to sustain crop productivity while reducing our dependence on herbicides and tillage. Such a development will also allay some of the negative perceptions associated with the use of herbicide-resistance genes and heavy dependence on herbicides. Transgenic plants expressing the bacterial phosphite dehydrogenase (ptxD) gene gain an ability to convert phosphite (Phi) into orthophosphate [Pi, the metabolizable form of phosphorus (P)]. Such plants allow for a selective fertilization scheme, based on Phi as the sole source of P for the crop, while offering an effective alternative for suppressing weed growth. Here, we show that, when P is supplied in the form of Phi, ptxD-expressing cotton (Gossypium hirsutum L.) plants outcompete, in both artificial substrates and natural soils from agricultural fields, three different monocot and dicot weed species intentionally introduced in the experiments, as well as weeds naturally present in the tested soils. Importantly, the ptxD/Phi system proved highly efficacious in inhibiting the growth of glyphosate-resistant Palmer amaranth. With over 250 weed species resistant to currently available herbicides, ptxD-transgenic plants fertilized with Phi could provide an effective alternative to suppressing the growth of these weeds while providing adequate nutrition to the crop. National Academy of Sciences 2018-07-17 2018-06-04 /pmc/articles/PMC6055188/ /pubmed/29866830 http://dx.doi.org/10.1073/pnas.1804862115 Text en Copyright © 2018 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle PNAS Plus
Pandeya, Devendra
López-Arredondo, Damar L.
Janga, Madhusudhana R.
Campbell, LeAnne M.
Estrella-Hernández, Priscila
Bagavathiannan, Muthukumar V.
Herrera-Estrella, Luis
Rathore, Keerti S.
Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title_full Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title_fullStr Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title_full_unstemmed Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title_short Selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxD gene while suppressing weeds
title_sort selective fertilization with phosphite allows unhindered growth of cotton plants expressing the ptxd gene while suppressing weeds
topic PNAS Plus
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6055188/
https://www.ncbi.nlm.nih.gov/pubmed/29866830
http://dx.doi.org/10.1073/pnas.1804862115
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