Mineral nutrition of campos rupestres plant species on contrasting nutrient-impoverished soil types.
Identifieur interne : 001648 ( Main/Corpus ); précédent : 001647; suivant : 001649Mineral nutrition of campos rupestres plant species on contrasting nutrient-impoverished soil types.
Auteurs : Rafael S. Oliveira ; Hugo C. Galvão ; Mariana C R. De Campos ; Cleiton B. Eller ; Stuart J. Pearse ; Hans LambersSource :
- The New phytologist [ 1469-8137 ] ; 2015.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Minerals, Nitrogen, Phosphorus.
- chemistry : Plant Leaves, Plant Roots, Soil.
- metabolism : Plants.
- Ecosystem, Mycorrhizae, Nutritional Physiological Phenomena, Species Specificity.
Abstract
In Brazil, the campos rupestres occur over the Brazilian shield, and are characterized by acidic nutrient-impoverished soils, which are particularly low in phosphorus (P). Despite recognition of the campos rupestres as a global biodiversity hotspot, little is known about the diversity of P-acquisition strategies and other aspects of plant mineral nutrition in this region. To explore nutrient-acquisition strategies and assess aspects of plant P nutrition, we measured leaf P and nitrogen (N) concentrations, characterized root morphology and determined the percentage arbuscular mycorrhizal (AM) colonization of 50 dominant species in six communities, representing a gradient of soil P availability. Leaf manganese (Mn) concentration was measured as a proxy for carboxylate-releasing strategies. Communities on the most P-impoverished soils had the highest proportion of nonmycorrhizal (NM) species, the lowest percentage of mycorrhizal colonization, and the greatest diversity of root specializations. The large spectrum of leaf P concentration and variation in root morphologies show high functional diversity for nutritional strategies. Higher leaf Mn concentrations were observed in NM compared with AM species, indicating that carboxylate-releasing P-mobilizing strategies are likely to be present in NM species. The soils of the campos rupestres are similar to the most P-impoverished soils in the world. The prevalence of NM strategies indicates a strong global functional convergence in plant mineral nutrition strategies among severely P-impoverished ecosystems.
DOI: 10.1111/nph.13175
PubMed: 25425486
Links to Exploration step
pubmed:25425486Le document en format XML
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<author><name sortKey="Oliveira, Rafael S" sort="Oliveira, Rafael S" uniqKey="Oliveira R" first="Rafael S" last="Oliveira">Rafael S. Oliveira</name>
<affiliation><nlm:affiliation>Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Rua Monteiro Lobato 255, Campinas, 13083-862, Brazil; School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia.</nlm:affiliation>
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<author><name sortKey="Galvao, Hugo C" sort="Galvao, Hugo C" uniqKey="Galvao H" first="Hugo C" last="Galvão">Hugo C. Galvão</name>
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<author><name sortKey="De Campos, Mariana C R" sort="De Campos, Mariana C R" uniqKey="De Campos M" first="Mariana C R" last="De Campos">Mariana C R. De Campos</name>
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<author><name sortKey="Eller, Cleiton B" sort="Eller, Cleiton B" uniqKey="Eller C" first="Cleiton B" last="Eller">Cleiton B. Eller</name>
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<author><name sortKey="Pearse, Stuart J" sort="Pearse, Stuart J" uniqKey="Pearse S" first="Stuart J" last="Pearse">Stuart J. Pearse</name>
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<term>Minerals (analysis)</term>
<term>Mycorrhizae (MeSH)</term>
<term>Nitrogen (analysis)</term>
<term>Nutritional Physiological Phenomena (MeSH)</term>
<term>Phosphorus (analysis)</term>
<term>Plant Leaves (chemistry)</term>
<term>Plant Roots (chemistry)</term>
<term>Plants (metabolism)</term>
<term>Soil (chemistry)</term>
<term>Species Specificity (MeSH)</term>
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<term>Phosphorus</term>
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<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Plant Leaves</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plants</term>
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<keywords scheme="MESH" xml:lang="en"><term>Ecosystem</term>
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<front><div type="abstract" xml:lang="en">In Brazil, the campos rupestres occur over the Brazilian shield, and are characterized by acidic nutrient-impoverished soils, which are particularly low in phosphorus (P). Despite recognition of the campos rupestres as a global biodiversity hotspot, little is known about the diversity of P-acquisition strategies and other aspects of plant mineral nutrition in this region. To explore nutrient-acquisition strategies and assess aspects of plant P nutrition, we measured leaf P and nitrogen (N) concentrations, characterized root morphology and determined the percentage arbuscular mycorrhizal (AM) colonization of 50 dominant species in six communities, representing a gradient of soil P availability. Leaf manganese (Mn) concentration was measured as a proxy for carboxylate-releasing strategies. Communities on the most P-impoverished soils had the highest proportion of nonmycorrhizal (NM) species, the lowest percentage of mycorrhizal colonization, and the greatest diversity of root specializations. The large spectrum of leaf P concentration and variation in root morphologies show high functional diversity for nutritional strategies. Higher leaf Mn concentrations were observed in NM compared with AM species, indicating that carboxylate-releasing P-mobilizing strategies are likely to be present in NM species. The soils of the campos rupestres are similar to the most P-impoverished soils in the world. The prevalence of NM strategies indicates a strong global functional convergence in plant mineral nutrition strategies among severely P-impoverished ecosystems. </div>
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<Title>The New phytologist</Title>
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<Abstract><AbstractText>In Brazil, the campos rupestres occur over the Brazilian shield, and are characterized by acidic nutrient-impoverished soils, which are particularly low in phosphorus (P). Despite recognition of the campos rupestres as a global biodiversity hotspot, little is known about the diversity of P-acquisition strategies and other aspects of plant mineral nutrition in this region. To explore nutrient-acquisition strategies and assess aspects of plant P nutrition, we measured leaf P and nitrogen (N) concentrations, characterized root morphology and determined the percentage arbuscular mycorrhizal (AM) colonization of 50 dominant species in six communities, representing a gradient of soil P availability. Leaf manganese (Mn) concentration was measured as a proxy for carboxylate-releasing strategies. Communities on the most P-impoverished soils had the highest proportion of nonmycorrhizal (NM) species, the lowest percentage of mycorrhizal colonization, and the greatest diversity of root specializations. The large spectrum of leaf P concentration and variation in root morphologies show high functional diversity for nutritional strategies. Higher leaf Mn concentrations were observed in NM compared with AM species, indicating that carboxylate-releasing P-mobilizing strategies are likely to be present in NM species. The soils of the campos rupestres are similar to the most P-impoverished soils in the world. The prevalence of NM strategies indicates a strong global functional convergence in plant mineral nutrition strategies among severely P-impoverished ecosystems. </AbstractText>
<CopyrightInformation>© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.</CopyrightInformation>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Oliveira</LastName>
<ForeName>Rafael S</ForeName>
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<AffiliationInfo><Affiliation>Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Rua Monteiro Lobato 255, Campinas, 13083-862, Brazil; School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia.</Affiliation>
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