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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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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
05/12/2017 |
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Data da última atualização: |
06/12/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
AVILA, R. G.; SILVA, E. M. da; MAGALHAES, P. C.; ALVARENGA, A. A. de; LAVINSKY, A. de O. |
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Afiliação: |
Roniel Geraldo Avila, Universidade Federal de Lavras; Eder Marcos da Silva, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; Amauri Alves de Alvarenga, Universidade Federal de Lavras; Alyne de Oliveira Lavinsky. |
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Título: |
Drought changes yield and organic and mineral composition of grains of four maize genotypes. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Academia Journal of Agricultural Research, v. 5, n. 9, p. 243-250, Sept. 2017. |
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DOI: |
10.15413/ajar.2017.0517 |
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Idioma: |
Inglês |
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Conteúdo: |
When drought occurs in the pre-flowering of maize with high intensity and average duration of twelve days, it promotes changes in the centesimal composition of grain and reduces yield grains by up to 60%. Therefore, this work aims to evaluate the changes in yield grain and in organic and mineral composition of grains of four maize genotypes with contrasting characteristics for drought tolerance submitted to severe drought in pre-flowering. For this, under greenhouse conditions, drought-tolerant genotypes (DKB390 and P30F35) and drought-sensitive genotypes (BRS1010 and 2B710) of maize were submitted to two water conditions: field capacity and water deficit. Drought was imposed in pre-flowering and maintained for twelve days. The leaf water potential and at the end of the cycle the components of productivity was evaluated. Dry grains were ground and a sample obtained for analysis of organic and mineral composition. We verified that, water deficit promoted a reduction in the number of grains per row in all genotypes. However, only BRS1010 and 2B710, two drought-sensitive genotypes, had their final grain yield reduced. All genotypes under drought conditions reduced starch content and increased protein levels in their grains. Phosphorus, iron, magnesium, zinc, manganese and copper levels increased in plants under water deficit. On the other hand, calcium content was reduced by drought in all genotypes. |
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Palavras-Chave: |
Composição centesimal. |
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Thesagro: |
Amido; Deficiência hídrica; Grão; Proteína. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02165naa a2200241 a 4500
001 2081606
005 2017-12-06
008 2017 bl uuuu u00u1 u #d
024 7 $a10.15413/ajar.2017.0517$2DOI
100 1 $aAVILA, R. G.
245 $aDrought changes yield and organic and mineral composition of grains of four maize genotypes.$h[electronic resource]
260 $c2017
520 $aWhen drought occurs in the pre-flowering of maize with high intensity and average duration of twelve days, it promotes changes in the centesimal composition of grain and reduces yield grains by up to 60%. Therefore, this work aims to evaluate the changes in yield grain and in organic and mineral composition of grains of four maize genotypes with contrasting characteristics for drought tolerance submitted to severe drought in pre-flowering. For this, under greenhouse conditions, drought-tolerant genotypes (DKB390 and P30F35) and drought-sensitive genotypes (BRS1010 and 2B710) of maize were submitted to two water conditions: field capacity and water deficit. Drought was imposed in pre-flowering and maintained for twelve days. The leaf water potential and at the end of the cycle the components of productivity was evaluated. Dry grains were ground and a sample obtained for analysis of organic and mineral composition. We verified that, water deficit promoted a reduction in the number of grains per row in all genotypes. However, only BRS1010 and 2B710, two drought-sensitive genotypes, had their final grain yield reduced. All genotypes under drought conditions reduced starch content and increased protein levels in their grains. Phosphorus, iron, magnesium, zinc, manganese and copper levels increased in plants under water deficit. On the other hand, calcium content was reduced by drought in all genotypes.
650 $aAmido
650 $aDeficiência hídrica
650 $aGrão
650 $aProteína
653 $aComposição centesimal
700 1 $aSILVA, E. M. da
700 1 $aMAGALHAES, P. C.
700 1 $aALVARENGA, A. A. de
700 1 $aLAVINSKY, A. de O.
773 $tAcademia Journal of Agricultural Research$gv. 5, n. 9, p. 243-250, Sept. 2017.
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Embrapa Milho e Sorgo (CNPMS) |
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