Reduced root cortical burden improves growth and grain yield under low phosphorus availability in maize.
Identifieur interne : 000935 ( Main/Corpus ); précédent : 000934; suivant : 000936Reduced root cortical burden improves growth and grain yield under low phosphorus availability in maize.
Auteurs : Tania Galindo-Casta Eda ; Kathleen M. Brown ; Jonathan P. LynchSource :
- Plant, cell & environment [ 1365-3040 ] ; 2018.
English descriptors
- KwdEn :
- Edible Grain (growth & development), Mycorrhizae (metabolism), Phosphorus (deficiency), Phosphorus (metabolism), Plant Roots (anatomy & histology), Plant Roots (metabolism), Plant Roots (physiology), Plant Shoots (metabolism), Plant Shoots (physiology), Zea mays (growth & development), Zea mays (metabolism).
- MESH :
- chemical , deficiency : Phosphorus.
- anatomy & histology : Plant Roots.
- growth & development : Edible Grain, Zea mays.
- metabolism : Mycorrhizae, Phosphorus, Plant Roots, Plant Shoots, Zea mays.
- physiology : Plant Roots, Plant Shoots.
Abstract
Root phenes and phene states that reduce the metabolic cost of soil exploration may improve plant growth under low phosphorus availability. We tested the hypothesis that under low phosphorus, reduced living cortical area (LCA) would increase soil exploration, phosphorus capture, biomass, and grain yield. Maize genotypes contrasting in LCA were grown in the field and in greenhouse mesocosms under optimal and suboptimal phosphorus regimes. Percent LCA in nodal roots ranged from 25% to 67%. Plants with 0.2 mm2 less LCA under low phosphorus had 75% less root segment respiration, 54% less root phosphorus content, rooted 20 cm deeper, allocated up to four times more roots between 60 and 120 cm depth, had between 20% and 150% more biomass, 35-40% greater leaf phosphorus content, and 60% greater grain yield compared with plants with high LCA. Low-LCA plants had up to 55% less arbuscular mycorrhizal colonization in axial roots, but this decrease was not correlated with biomass or phosphorus content. The LCA components cortical cell file number and cortical cell size were important for biomass and phosphorus content under low phosphorus. These results are consistent with the hypothesis that root phenes that decrease the metabolic cost of soil exploration are adaptive under phosphorus stress.
DOI: 10.1111/pce.13197
PubMed: 29574982
Links to Exploration step
pubmed:29574982Le document en format XML
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<author><name sortKey="Galindo Casta Eda, Tania" sort="Galindo Casta Eda, Tania" uniqKey="Galindo Casta Eda T" first="Tania" last="Galindo-Casta Eda">Tania Galindo-Casta Eda</name>
<affiliation><nlm:affiliation>Department of Plant Science, The Pennsylvania State University, University Park, PA, 16802, USA.</nlm:affiliation>
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<author><name sortKey="Brown, Kathleen M" sort="Brown, Kathleen M" uniqKey="Brown K" first="Kathleen M" last="Brown">Kathleen M. Brown</name>
<affiliation><nlm:affiliation>Department of Plant Science, The Pennsylvania State University, University Park, PA, 16802, USA.</nlm:affiliation>
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<author><name sortKey="Lynch, Jonathan P" sort="Lynch, Jonathan P" uniqKey="Lynch J" first="Jonathan P" last="Lynch">Jonathan P. Lynch</name>
<affiliation><nlm:affiliation>Department of Plant Science, The Pennsylvania State University, University Park, PA, 16802, USA.</nlm:affiliation>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Reduced root cortical burden improves growth and grain yield under low phosphorus availability in maize.</title>
<author><name sortKey="Galindo Casta Eda, Tania" sort="Galindo Casta Eda, Tania" uniqKey="Galindo Casta Eda T" first="Tania" last="Galindo-Casta Eda">Tania Galindo-Casta Eda</name>
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<author><name sortKey="Brown, Kathleen M" sort="Brown, Kathleen M" uniqKey="Brown K" first="Kathleen M" last="Brown">Kathleen M. Brown</name>
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<author><name sortKey="Lynch, Jonathan P" sort="Lynch, Jonathan P" uniqKey="Lynch J" first="Jonathan P" last="Lynch">Jonathan P. Lynch</name>
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<series><title level="j">Plant, cell & environment</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Edible Grain (growth & development)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Phosphorus (deficiency)</term>
<term>Phosphorus (metabolism)</term>
<term>Plant Roots (anatomy & histology)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Roots (physiology)</term>
<term>Plant Shoots (metabolism)</term>
<term>Plant Shoots (physiology)</term>
<term>Zea mays (growth & development)</term>
<term>Zea mays (metabolism)</term>
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<keywords scheme="MESH" type="chemical" qualifier="deficiency" xml:lang="en"><term>Phosphorus</term>
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<keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Plant Roots</term>
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<term>Zea mays</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Mycorrhizae</term>
<term>Phosphorus</term>
<term>Plant Roots</term>
<term>Plant Shoots</term>
<term>Zea mays</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Roots</term>
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<front><div type="abstract" xml:lang="en">Root phenes and phene states that reduce the metabolic cost of soil exploration may improve plant growth under low phosphorus availability. We tested the hypothesis that under low phosphorus, reduced living cortical area (LCA) would increase soil exploration, phosphorus capture, biomass, and grain yield. Maize genotypes contrasting in LCA were grown in the field and in greenhouse mesocosms under optimal and suboptimal phosphorus regimes. Percent LCA in nodal roots ranged from 25% to 67%. Plants with 0.2 mm<sup>2</sup>
less LCA under low phosphorus had 75% less root segment respiration, 54% less root phosphorus content, rooted 20 cm deeper, allocated up to four times more roots between 60 and 120 cm depth, had between 20% and 150% more biomass, 35-40% greater leaf phosphorus content, and 60% greater grain yield compared with plants with high LCA. Low-LCA plants had up to 55% less arbuscular mycorrhizal colonization in axial roots, but this decrease was not correlated with biomass or phosphorus content. The LCA components cortical cell file number and cortical cell size were important for biomass and phosphorus content under low phosphorus. These results are consistent with the hypothesis that root phenes that decrease the metabolic cost of soil exploration are adaptive under phosphorus stress.</div>
</front>
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<Abstract><AbstractText>Root phenes and phene states that reduce the metabolic cost of soil exploration may improve plant growth under low phosphorus availability. We tested the hypothesis that under low phosphorus, reduced living cortical area (LCA) would increase soil exploration, phosphorus capture, biomass, and grain yield. Maize genotypes contrasting in LCA were grown in the field and in greenhouse mesocosms under optimal and suboptimal phosphorus regimes. Percent LCA in nodal roots ranged from 25% to 67%. Plants with 0.2 mm<sup>2</sup>
less LCA under low phosphorus had 75% less root segment respiration, 54% less root phosphorus content, rooted 20 cm deeper, allocated up to four times more roots between 60 and 120 cm depth, had between 20% and 150% more biomass, 35-40% greater leaf phosphorus content, and 60% greater grain yield compared with plants with high LCA. Low-LCA plants had up to 55% less arbuscular mycorrhizal colonization in axial roots, but this decrease was not correlated with biomass or phosphorus content. The LCA components cortical cell file number and cortical cell size were important for biomass and phosphorus content under low phosphorus. These results are consistent with the hypothesis that root phenes that decrease the metabolic cost of soil exploration are adaptive under phosphorus stress.</AbstractText>
<CopyrightInformation>© 2018 John Wiley & Sons Ltd.</CopyrightInformation>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Galindo-Castañeda</LastName>
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