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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
08/10/2021 |
Data da última atualização: |
13/10/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TAYLOR, T. C.; WISNIEWSKI, W. T.; ALVES, E. G.; OLIVEIRA JUNIOR, R. C. de; SALESKA, S. R. |
Afiliação: |
TYEEN C. TAYLOR, University of Arizona / University of Miami; WIT T. WISNIEWSKI, University of Arizona; ELIANE G. ALVES, Max Planck Institute for Biogeochemistry; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; SCOTT R. SALESKA, University of Arizona. |
Título: |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Frontiers in Forests and Global Change, v. 4, article 668228, July 2021. |
DOI: |
10.3389/ffgc.2021.668228 |
Idioma: |
Inglês |
Conteúdo: |
Both plant physiology and atmospheric chemistry are substantially altered by the emission of volatile isoprenoids (VI), such as isoprene and monoterpenes, from plant leaves. Yet, since gaining scientific attention in the 1950?s, empirical research on leaf VI has been largely confined to laboratory experiments and atmospheric observations. Here, we introduce a new field instrument designed to bridge the scales from leaf to atmosphere, by enabling precision VI detection in real time from plants in their natural ecological setting. With a field campaign in the Brazilian Amazon, we reveal an unexpected distribution of leaf emission capacities (EC) across the vertical axis of the forest canopy, with EC peaking in the mid-canopy instead of the sun-exposed canopy surface, and moderately high emissions occurring in understory specialist species. Compared to the simple interpretation that VI protect leaves from heat stress at the hot canopy surface, our results encourage a more nuanced view of the adaptive role of VI in plants. We infer that forest emissions to the atmosphere depend on the dynamic microenvironments imposed by canopy structure, and not simply on canopy surface conditions. We provide a new emissions inventory from 52 tropical tree species, revealing moderate consistency in EC within taxonomic groups. We highlight priorities in leaf volatiles research that require field-portable detection systems. Our self-contained, portable instrument provides real-time detection and live measurement feedback with precision and detection limits better than 0.5 nmolVI m-2 leaf s-1. We call the instrument ?PORCO? based on the gas detection method: photoionization of organic compounds. We provide a thorough validation of PORCO and demonstrate its capacity to detect ecologically driven variation in leaf emission rates and thus accelerate a nascent field of science: the ecology and ecophysiology of plant volatiles. MenosBoth plant physiology and atmospheric chemistry are substantially altered by the emission of volatile isoprenoids (VI), such as isoprene and monoterpenes, from plant leaves. Yet, since gaining scientific attention in the 1950?s, empirical research on leaf VI has been largely confined to laboratory experiments and atmospheric observations. Here, we introduce a new field instrument designed to bridge the scales from leaf to atmosphere, by enabling precision VI detection in real time from plants in their natural ecological setting. With a field campaign in the Brazilian Amazon, we reveal an unexpected distribution of leaf emission capacities (EC) across the vertical axis of the forest canopy, with EC peaking in the mid-canopy instead of the sun-exposed canopy surface, and moderately high emissions occurring in understory specialist species. Compared to the simple interpretation that VI protect leaves from heat stress at the hot canopy surface, our results encourage a more nuanced view of the adaptive role of VI in plants. We infer that forest emissions to the atmosphere depend on the dynamic microenvironments imposed by canopy structure, and not simply on canopy surface conditions. We provide a new emissions inventory from 52 tropical tree species, revealing moderate consistency in EC within taxonomic groups. We highlight priorities in leaf volatiles research that require field-portable detection systems. Our self-contained, portable instrument provides real-time detection and ... Mostrar Tudo |
Palavras-Chave: |
Ecofisiologia; Estrutura florestal; Microambiente; Química atmosférica. |
Thesagro: |
Floresta Tropical. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226815/1/ffgc-04-6682281.pdf
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Marc: |
LEADER 02738naa a2200241 a 4500 001 2135178 005 2021-10-13 008 2021 bl uuuu u00u1 u #d 024 7 $a10.3389/ffgc.2021.668228$2DOI 100 1 $aTAYLOR, T. C. 245 $aA new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest.$h[electronic resource] 260 $c2021 520 $aBoth plant physiology and atmospheric chemistry are substantially altered by the emission of volatile isoprenoids (VI), such as isoprene and monoterpenes, from plant leaves. Yet, since gaining scientific attention in the 1950?s, empirical research on leaf VI has been largely confined to laboratory experiments and atmospheric observations. Here, we introduce a new field instrument designed to bridge the scales from leaf to atmosphere, by enabling precision VI detection in real time from plants in their natural ecological setting. With a field campaign in the Brazilian Amazon, we reveal an unexpected distribution of leaf emission capacities (EC) across the vertical axis of the forest canopy, with EC peaking in the mid-canopy instead of the sun-exposed canopy surface, and moderately high emissions occurring in understory specialist species. Compared to the simple interpretation that VI protect leaves from heat stress at the hot canopy surface, our results encourage a more nuanced view of the adaptive role of VI in plants. We infer that forest emissions to the atmosphere depend on the dynamic microenvironments imposed by canopy structure, and not simply on canopy surface conditions. We provide a new emissions inventory from 52 tropical tree species, revealing moderate consistency in EC within taxonomic groups. We highlight priorities in leaf volatiles research that require field-portable detection systems. Our self-contained, portable instrument provides real-time detection and live measurement feedback with precision and detection limits better than 0.5 nmolVI m-2 leaf s-1. We call the instrument ?PORCO? based on the gas detection method: photoionization of organic compounds. We provide a thorough validation of PORCO and demonstrate its capacity to detect ecologically driven variation in leaf emission rates and thus accelerate a nascent field of science: the ecology and ecophysiology of plant volatiles. 650 $aFloresta Tropical 653 $aEcofisiologia 653 $aEstrutura florestal 653 $aMicroambiente 653 $aQuímica atmosférica 700 1 $aWISNIEWSKI, W. T. 700 1 $aALVES, E. G. 700 1 $aOLIVEIRA JUNIOR, R. C. de 700 1 $aSALESKA, S. R. 773 $tFrontiers in Forests and Global Change$gv. 4, article 668228, July 2021.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
25/11/1996 |
Data da última atualização: |
10/09/2013 |
Autoria: |
ARRIEL, N. H. C.; ANDRADE, F. P. de; COSTA, I. T. da; ALENCAR, A. R. de; GUEDES, A. |
Título: |
Comportamento de genotipos de gergelim quanto a capacidade de retenção de sementes na capsula. |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
Campina Grande: EMBRAPA-CNPA, 1996 |
Páginas: |
4p. |
Série: |
(EMBRAPA-CNPA: Pesquisa em Andamento, 28 |
Idioma: |
Português |
Palavras-Chave: |
Banc; Banco; Brasil; Paraiba; Sesame. |
Thesagro: |
Gergelim; Germoplasma; Melhoramento; Sesamum Indicum. |
Thesaurus NAL: |
germplasm; Sousa. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00798nam a2200301 a 4500 001 1269404 005 2013-09-10 008 1996 bl uuuu u0uu1 u #d 100 1 $aARRIEL, N. H. C. 245 $aComportamento de genotipos de gergelim quanto a capacidade de retenção de sementes na capsula. 260 $aCampina Grande: EMBRAPA-CNPA$c1996 300 $a4p. 490 $a(EMBRAPA-CNPA: Pesquisa em Andamento, 28 650 $agermplasm 650 $aSousa 650 $aGergelim 650 $aGermoplasma 650 $aMelhoramento 650 $aSesamum Indicum 653 $aBanc 653 $aBanco 653 $aBrasil 653 $aParaiba 653 $aSesame 700 1 $aANDRADE, F. P. de 700 1 $aCOSTA, I. T. da 700 1 $aALENCAR, A. R. de 700 1 $aGUEDES, A.
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