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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
17/11/2020 |
Data da última atualização: |
26/11/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SMITH, M. N.; TAYLOR, T. C.; HAREN, J. van; ROSOLEM, R.; RESTREPO-COUPE, N.; ADAMS, J.; WU, J.; OLIVEIRA JUNIOR, R. C. de; SILVA, R. da; ARAUJO, A. C. de; CAMARGO, P. B. de; HUXMAN, T. E.; SALESKA, S. R. |
Afiliação: |
Marielle N. Smith, University of Arizona / Michigan State University; Tyeen C. Taylor, University of Arizona / University of Michigan; Joost van Haren, University of Arizona; Rafael Rosolem, University of Bristol; Natalia Restrepo-Coupe, University of Arizona / University of Technology Sydney; John Adams, University of Arizona; Jin Wu, The University of Hong Kong; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; Rodrigo da Silva, UFOPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU / INPA; Plinio B. de Camargo, CENA/USP; Travis E. Huxman, University of California; Scott R. Saleska, University of Arizona. |
Título: |
Empirical evidence for resilience of tropical forest photosynthesis in a warmer world. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Nature Plants, v. 6, p. 1225-1230, 2020. |
DOI: |
https://doi.org/10.1038/s41477-020-00780-2 |
Idioma: |
Inglês |
Conteúdo: |
Tropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induced stomatal limitation through enhanced water-use efficiency as hypothesized, tropical forest photosynthesis may have a margin of resilience to future warming. MenosTropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induce... Mostrar Tudo |
Thesagro: |
Floresta Tropical; Fotossíntese. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02529naa a2200301 a 4500 001 2126677 005 2020-11-26 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1038/s41477-020-00780-2$2DOI 100 1 $aSMITH, M. N. 245 $aEmpirical evidence for resilience of tropical forest photosynthesis in a warmer world.$h[electronic resource] 260 $c2020 520 $aTropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induced stomatal limitation through enhanced water-use efficiency as hypothesized, tropical forest photosynthesis may have a margin of resilience to future warming. 650 $aFloresta Tropical 650 $aFotossíntese 700 1 $aTAYLOR, T. C. 700 1 $aHAREN, J. van 700 1 $aROSOLEM, R. 700 1 $aRESTREPO-COUPE, N. 700 1 $aADAMS, J. 700 1 $aWU, J. 700 1 $aOLIVEIRA JUNIOR, R. C. de 700 1 $aSILVA, R. da 700 1 $aARAUJO, A. C. de 700 1 $aCAMARGO, P. B. de 700 1 $aHUXMAN, T. E. 700 1 $aSALESKA, S. R. 773 $tNature Plants$gv. 6, p. 1225-1230, 2020.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
02/12/2022 |
Data da última atualização: |
02/12/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
CASARIN, T.; FREITAS, N. C.; PINTO, R. T.; BREITLER, J-C.; RODRIGUES, L. A. Z.; MARRACCINI, P.; ETIENNE, H.; DINIZ, L. E. C.; ANDRADE, A. C.; PAIVA, L. V. |
Afiliação: |
TATIANE CASARIN, UNIVERSIDADE FEDERAL DE LAVRAS; NATÁLIA CHAGAS FREITAS, UNIVERSIDADE FEDERAL DE LAVRAS; RENAN TERASSI PINTO, UNIVERSIDADE FEDERAL DE LAVRAS; JEAN‑CHRISTOPHE BREITLER, CIRAD, IRD, UMR DIADE; LEONARDO AUGUSTO ZEBRAL RODRIGUES, UNIVERSIDADE FEDERAL DE LAVRAS; PIERRE MARRACCINI, CIRAD, IRD, UMR DIADE; HERVÉ ETIENNE, CIRAD, IRD, UMR DIADE; LEANDRO EUGENIO CARDAMONE DINIZ, CNPSO; ALAN CARVALHO ANDRADE, CNPCa; LUCIANO VILELA PAIVA, UNIVERSIDADE FEDERAL DE LAVRAS. |
Título: |
Multiplex CRISPR/Cas9-mediated knockout of the phytoene desaturase gene in Coffea canephora. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Scientific Reports, v. 12, 17270, 2022. |
Páginas: |
10 p. |
DOI: |
10.1038/s41598-022-21566-w |
Idioma: |
Inglês |
Thesagro: |
Café; Coffea Canephora. |
Thesaurus NAL: |
Coffea; Coffee beans. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1149162/1/Multiplex-CRISPR.pdf
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Marc: |
LEADER 00814naa a2200289 a 4500 001 2149162 005 2022-12-02 008 2022 bl uuuu u00u1 u #d 024 7 $a10.1038/s41598-022-21566-w$2DOI 100 1 $aCASARIN, T. 245 $aMultiplex CRISPR/Cas9-mediated knockout of the phytoene desaturase gene in Coffea canephora.$h[electronic resource] 260 $c2022 300 $a10 p. 650 $aCoffea 650 $aCoffee beans 650 $aCafé 650 $aCoffea Canephora 700 1 $aFREITAS, N. C. 700 1 $aPINTO, R. T. 700 1 $aBREITLER, J-C. 700 1 $aRODRIGUES, L. A. Z. 700 1 $aMARRACCINI, P. 700 1 $aETIENNE, H. 700 1 $aDINIZ, L. E. C. 700 1 $aANDRADE, A. C. 700 1 $aPAIVA, L. V. 773 $tScientific Reports$gv. 12, 17270, 2022.
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