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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
07/06/2005 |
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Data da última atualização: |
07/06/2005 |
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Autoria: |
NERY, M. C.; CARVALHO, M. L. M. de; OLIVEIRA, L. M. de. |
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Título: |
Determinação do grau de umidade de sementes de ipê-do-cerrado Tabebuia ochracea ((Cham.) Standl.) pelos métodos de estufa e forno de microondas. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Ciência e Agrotecnologia, Lavras, v. 28, n. 6, p. 1299-1305, nov./dez. 2004. |
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Idioma: |
Português |
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Palavras-Chave: |
Espécie florestal; Ipê do Cerrado; Tabebuia ochracea; Teor de água. |
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Thesagro: |
Semente. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00658naa a2200193 a 4500
001 1297471
005 2005-06-07
008 2004 bl uuuu u00u1 u #d
100 1 $aNERY, M. C.
245 $aDeterminação do grau de umidade de sementes de ipê-do-cerrado Tabebuia ochracea ((Cham.) Standl.) pelos métodos de estufa e forno de microondas.
260 $c2004
650 $aSemente
653 $aEspécie florestal
653 $aIpê do Cerrado
653 $aTabebuia ochracea
653 $aTeor de água
700 1 $aCARVALHO, M. L. M. de
700 1 $aOLIVEIRA, L. M. de
773 $tCiência e Agrotecnologia, Lavras$gv. 28, n. 6, p. 1299-1305, nov./dez. 2004.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
08/10/2021 |
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Data da última atualização: |
13/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
TAYLOR, T. C.; WISNIEWSKI, W. T.; ALVES, E. G.; OLIVEIRA JUNIOR, R. C. de; SALESKA, S. R. |
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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. |
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Título: |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Frontiers in Forests and Global Change, v. 4, article 668228, July 2021. |
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DOI: |
10.3389/ffgc.2021.668228 |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Ecofisiologia; Estrutura florestal; Microambiente; Química atmosférica. |
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Thesagro: |
Floresta Tropical. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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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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Embrapa Amazônia Oriental (CPATU) |
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