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Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil

The development of crops with better growth under suboptimal phosphorus availability would improve food security in developing countries while reducing environmental pollution in developed countries. We tested the hypothesis that maize (Zea mays) phenotypes with greater lateral root branching densit...

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Autores principales: Jia, Xucun, Liu, Peng, Lynch, Jonathan P
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137997/
https://www.ncbi.nlm.nih.gov/pubmed/30295904
http://dx.doi.org/10.1093/jxb/ery252
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author Jia, Xucun
Liu, Peng
Lynch, Jonathan P
author_facet Jia, Xucun
Liu, Peng
Lynch, Jonathan P
author_sort Jia, Xucun
collection PubMed
description The development of crops with better growth under suboptimal phosphorus availability would improve food security in developing countries while reducing environmental pollution in developed countries. We tested the hypothesis that maize (Zea mays) phenotypes with greater lateral root branching density have greater phosphorus acquisition from low phosphorus soils. Recombinant inbred lines with either ‘many short’ (MS) or ‘few long’ (FL) lateral root phenotypes were grown under high and low phosphorus conditions in greenhouse mesocosms and in the field. Under low phosphorus in mesocosms, lines with the MS phenotype had 89% greater phosphorus acquisition and 48% more shoot biomass than FL lines. Under low phosphorus in the field, MS lines had 16% shallower rooting depth (D(95)), 81% greater root length density in the top 20 cm of the soil, 49% greater shoot phosphorus content, 12% greater leaf photosynthesis, 19% greater shoot biomass, and 14% greater grain yield than FL lines. These results are consistent with the hypothesis that the phenotype of many, shorter lateral roots improves phosphorus acquisition under low phosphorus availability and merits consideration for genetic improvement of phosphorus efficiency in maize and other crops.
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spelling pubmed-61379972018-09-24 Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil Jia, Xucun Liu, Peng Lynch, Jonathan P J Exp Bot Research Papers The development of crops with better growth under suboptimal phosphorus availability would improve food security in developing countries while reducing environmental pollution in developed countries. We tested the hypothesis that maize (Zea mays) phenotypes with greater lateral root branching density have greater phosphorus acquisition from low phosphorus soils. Recombinant inbred lines with either ‘many short’ (MS) or ‘few long’ (FL) lateral root phenotypes were grown under high and low phosphorus conditions in greenhouse mesocosms and in the field. Under low phosphorus in mesocosms, lines with the MS phenotype had 89% greater phosphorus acquisition and 48% more shoot biomass than FL lines. Under low phosphorus in the field, MS lines had 16% shallower rooting depth (D(95)), 81% greater root length density in the top 20 cm of the soil, 49% greater shoot phosphorus content, 12% greater leaf photosynthesis, 19% greater shoot biomass, and 14% greater grain yield than FL lines. These results are consistent with the hypothesis that the phenotype of many, shorter lateral roots improves phosphorus acquisition under low phosphorus availability and merits consideration for genetic improvement of phosphorus efficiency in maize and other crops. Oxford University Press 2018-09-14 2018-07-26 /pmc/articles/PMC6137997/ /pubmed/30295904 http://dx.doi.org/10.1093/jxb/ery252 Text en © The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Jia, Xucun
Liu, Peng
Lynch, Jonathan P
Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title_full Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title_fullStr Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title_full_unstemmed Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title_short Greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
title_sort greater lateral root branching density in maize improves phosphorus acquisition from low phosphorus soil
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137997/
https://www.ncbi.nlm.nih.gov/pubmed/30295904
http://dx.doi.org/10.1093/jxb/ery252
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