A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest.
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.
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Artigo de periódico biblioteca |
Language: | Ingles English |
Published: |
2021-10-08
|
Subjects: | Ecofisiologia, Microambiente, Estrutura florestal, Química atmosférica, Floresta Tropical, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1135178 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-alice-doc-1135178 |
---|---|
record_format |
koha |
spelling |
dig-alice-doc-11351782021-10-08T13:00:39Z A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. TAYLOR, T. C. WISNIEWSKI, W. T. ALVES, E. G. OLIVEIRA JUNIOR, R. C. de SALESKA, S. R. 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. Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical 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. 2021-10-08T13:00:26Z 2021-10-08T13:00:26Z 2021-10-08 2021 Artigo de periódico Frontiers in Forests and Global Change, v. 4, article 668228, July 2021. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1135178 10.3389/ffgc.2021.668228 Ingles en openAccess |
institution |
EMBRAPA |
collection |
DSpace |
country |
Brasil |
countrycode |
BR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-alice |
tag |
biblioteca |
region |
America del Sur |
libraryname |
Sistema de bibliotecas de EMBRAPA |
language |
Ingles English |
topic |
Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical |
spellingShingle |
Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical TAYLOR, T. C. WISNIEWSKI, W. T. ALVES, E. G. OLIVEIRA JUNIOR, R. C. de SALESKA, S. R. A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
description |
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. |
author2 |
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. |
author_facet |
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. TAYLOR, T. C. WISNIEWSKI, W. T. ALVES, E. G. OLIVEIRA JUNIOR, R. C. de SALESKA, S. R. |
format |
Artigo de periódico |
topic_facet |
Ecofisiologia Microambiente Estrutura florestal Química atmosférica Floresta Tropical |
author |
TAYLOR, T. C. WISNIEWSKI, W. T. ALVES, E. G. OLIVEIRA JUNIOR, R. C. de SALESKA, S. R. |
author_sort |
TAYLOR, T. C. |
title |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
title_short |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
title_full |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
title_fullStr |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
title_full_unstemmed |
A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
title_sort |
new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest. |
publishDate |
2021-10-08 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1135178 |
work_keys_str_mv |
AT taylortc anewfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT wisniewskiwt anewfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT alveseg anewfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT oliveirajuniorrcde anewfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT saleskasr anewfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT taylortc newfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT wisniewskiwt newfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT alveseg newfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT oliveirajuniorrcde newfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest AT saleskasr newfieldinstrumentforleafvolatilesrevealsanunexpectedverticalprofileofisoprenoidemissioncapacitiesinatropicalforest |
_version_ |
1756027759087321088 |