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231224s2015 xx |||||o 00| ||eng c |
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7 |
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|a 10.1093/jxb/erv007
|2 doi
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|a eng
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| 100 |
1 |
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|a Zhan, Ai
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Reduced frequency of lateral root branching improves N capture from low-N soils in maize
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 27.01.2016
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|a Date Revised 23.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Suboptimal nitrogen (N) availability is a primary constraint for crop production in developing countries, while in developed countries, intensive N fertilization is a primary economic, energy, and environmental cost for crop production. We tested the hypothesis that under low-N conditions, maize (Zea mays) lines with few but long (FL) lateral roots would have greater axial root elongation, deeper rooting, and greater N acquisition than lines with many but short (MS) lateral roots. Maize recombinant inbred lines contrasting in lateral root number and length were grown with adequate and suboptimal N in greenhouse mesocosms and in the field in the USA and South Africa (SA). In low-N mesocosms, the FL phenotype had substantially reduced root respiration and greater rooting depth than the MS phenotype. In low-N fields in the USA and SA, the FL phenotype had greater rooting depth, shoot N content, leaf photosynthesis, and shoot biomass than the MS phenotype. The FL phenotype yielded 31.5% more than the MS phenotype under low N in the USA. Our results are consistent with the hypothesis that sparse but long lateral roots improve N capture from low-N soils. These results with maize probably pertain to other species. The FL lateral root phenotype merits consideration as a selection target for greater crop N efficiency
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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|a Branching
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|a frequency
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|a lateral root
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|a maize (Zea mays)
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|a nitrogen (N)
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| 700 |
1 |
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|a Lynch, Jonathan P
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 66(2015), 7 vom: 23. Apr., Seite 2055-65
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|x 1460-2431
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|g month:04
|g pages:2055-65
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|u http://dx.doi.org/10.1093/jxb/erv007
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