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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
09/12/2019 |
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Data da última atualização: |
10/12/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
RAKOCEVIC, M.; BATISTA, E. R. |
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Afiliação: |
Miroslava RAKOCEVIC, Unicamp; EUNICE REIS BATISTA, CNPMA. |
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Título: |
Photosynthetic light curve parameters over vertical profile of Coffea arabica plants after five years of FACE experiment. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
In: AGRICULTURE AND CLIMATE CHANGE CONFERENCE, 3., 2019, Budapest. [Abstracts...] Budapest: Elsevier Ltd., 2019. Ref. P073. |
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Idioma: |
Português |
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Conteúdo: |
Trends in climate changes indicate that the air [CO2] will continue to increase. The first plant response to elevated [CO2] (e[CO2]) is the increased photosynthetic rate. Photosynthetic rate dependence on light (A/PAR curves) is characterized by several parameters, often used to determine plant species responses to environment and phenological plasticity. The effects of water supply and phenological stage were expected, with no acclimation after long-term Coffea arabica L. cultivation under e[CO2]. The aim of the study was to determine variations in parameters of A/PAR curves in coffee leaves over a tree vertical profile after long-term cultivation under free-air-CO2-enrichment (FACE) system. The p arameters of A/PAR curves in C. arabica were estimated after five-years cultivation in FACE under two CO2 conditions, actual (a[CO2], ~390?L CO2 L-1) and e[CO2] (~590?L CO2 L-1), in two water regimes (rainfed and irrigation). The A/PAR curves were estimated in two phenological stages (grain formation - February 2016 and fruit maturation - May 2016). The A/PAR responses were determined by varying photosynthetic active radiation (PAR) from 1117 to 0 ?mol photons m?2 s?1 in four 50 cm-thick layers of vertical plant profile. The maximum photosynthesis (Amax), dark respiration (Rd), apparent quantum efficiency (?), and light compensation point (?) generally increased under e[CO2] compared to a[CO2], showing higher values during grain formation than during fruit maturation (Figure 1). The Rd and ? followed the progressive increase by layers only during the grain formation (Figures 1C and 1E). Continuation in e[CO2] stimulation indicated that leaf photosynthesis acclimation did not occur after five-years coffee cultivation under FACE. The lack of progressive increase in Amax, ? and ? over vertical profile indicates leaf plasticity to light availability, especially considering the high Amax of the two lowest layers. The compensation effects of e[CO2] to low water availability were observed in all A/PAR responses. MenosTrends in climate changes indicate that the air [CO2] will continue to increase. The first plant response to elevated [CO2] (e[CO2]) is the increased photosynthetic rate. Photosynthetic rate dependence on light (A/PAR curves) is characterized by several parameters, often used to determine plant species responses to environment and phenological plasticity. The effects of water supply and phenological stage were expected, with no acclimation after long-term Coffea arabica L. cultivation under e[CO2]. The aim of the study was to determine variations in parameters of A/PAR curves in coffee leaves over a tree vertical profile after long-term cultivation under free-air-CO2-enrichment (FACE) system. The p arameters of A/PAR curves in C. arabica were estimated after five-years cultivation in FACE under two CO2 conditions, actual (a[CO2], ~390?L CO2 L-1) and e[CO2] (~590?L CO2 L-1), in two water regimes (rainfed and irrigation). The A/PAR curves were estimated in two phenological stages (grain formation - February 2016 and fruit maturation - May 2016). The A/PAR responses were determined by varying photosynthetic active radiation (PAR) from 1117 to 0 ?mol photons m?2 s?1 in four 50 cm-thick layers of vertical plant profile. The maximum photosynthesis (Amax), dark respiration (Rd), apparent quantum efficiency (?), and light compensation point (?) generally increased under e[CO2] compared to a[CO2], showing higher values during grain formation than during fruit maturation (Figure 1). T... Mostrar Tudo |
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Palavras-Chave: |
Amax; Elevated CO2; FACE experiment. |
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Thesagro: |
Coffea Arábica; Mudança Climática; Seca. |
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Thesaurus Nal: |
Drought; Phenology. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/206488/1/RA-BatistaER-3rdAgricultureClimate...-2019-RefP073.pdf
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Marc: |
LEADER 02762nam a2200217 a 4500
001 2116357
005 2019-12-10
008 2019 bl uuuu u00u1 u #d
100 1 $aRAKOCEVIC, M.
245 $aPhotosynthetic light curve parameters over vertical profile of Coffea arabica plants after five years of FACE experiment.$h[electronic resource]
260 $aIn: AGRICULTURE AND CLIMATE CHANGE CONFERENCE, 3., 2019, Budapest. [Abstracts...] Budapest: Elsevier Ltd., 2019. Ref. P073.$c2019
520 $aTrends in climate changes indicate that the air [CO2] will continue to increase. The first plant response to elevated [CO2] (e[CO2]) is the increased photosynthetic rate. Photosynthetic rate dependence on light (A/PAR curves) is characterized by several parameters, often used to determine plant species responses to environment and phenological plasticity. The effects of water supply and phenological stage were expected, with no acclimation after long-term Coffea arabica L. cultivation under e[CO2]. The aim of the study was to determine variations in parameters of A/PAR curves in coffee leaves over a tree vertical profile after long-term cultivation under free-air-CO2-enrichment (FACE) system. The p arameters of A/PAR curves in C. arabica were estimated after five-years cultivation in FACE under two CO2 conditions, actual (a[CO2], ~390?L CO2 L-1) and e[CO2] (~590?L CO2 L-1), in two water regimes (rainfed and irrigation). The A/PAR curves were estimated in two phenological stages (grain formation - February 2016 and fruit maturation - May 2016). The A/PAR responses were determined by varying photosynthetic active radiation (PAR) from 1117 to 0 ?mol photons m?2 s?1 in four 50 cm-thick layers of vertical plant profile. The maximum photosynthesis (Amax), dark respiration (Rd), apparent quantum efficiency (?), and light compensation point (?) generally increased under e[CO2] compared to a[CO2], showing higher values during grain formation than during fruit maturation (Figure 1). The Rd and ? followed the progressive increase by layers only during the grain formation (Figures 1C and 1E). Continuation in e[CO2] stimulation indicated that leaf photosynthesis acclimation did not occur after five-years coffee cultivation under FACE. The lack of progressive increase in Amax, ? and ? over vertical profile indicates leaf plasticity to light availability, especially considering the high Amax of the two lowest layers. The compensation effects of e[CO2] to low water availability were observed in all A/PAR responses.
650 $aDrought
650 $aPhenology
650 $aCoffea Arábica
650 $aMudança Climática
650 $aSeca
653 $aAmax
653 $aElevated CO2
653 $aFACE experiment
700 1 $aBATISTA, E. R.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
18/10/2016 |
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Data da última atualização: |
18/10/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
CARVALHO, S. I. C. de; BOITEUX, L. S.; FONSECA, M. E. de N.; SILVA FILHO, J. G. da. |
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Afiliação: |
SABRINA ISABEL COSTA DE CARVALHO, CNPH; LEONARDO SILVA BOITEUX, CNPH; MARIA ESTHER DE N FONSECA BOITEUX, CNPH; JOSE GETULIO DA SILVA FILHO, CNPH. |
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Título: |
Banco ativo de germoplasma de tomate mantido na Embrapa Hortaliças. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE RECURSOS GENÉTICOS PARA A AMÉRICA LATINA E CARIBE, 10., 2015, Bento Gonçalves. Recursos genéticos no século 21: de Vavilov a Svalbard: anais... [s.l.]: Sociedade Brasileira de Recursos Genéticos, 2015. Editores técnicos: Rodrigo Cezar Franzon, Caroline Marques Castro, Alexandre Floriani Ramos, Sueli Correa Marques de Mello. SIRGEALC. |
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Páginas: |
p. 68 |
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Idioma: |
Português |
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Conteúdo: |
O presente trabalho teve como objetivo relatar as principais atividades realizadas no BAG tomate (enriquecimento, multiplicação, caracterização e conservação) e sua aplicação dentro dos programas de melhoramento genético. |
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Palavras-Chave: |
Solanum lycopersicon. |
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Thesagro: |
Banco de germoplasma; Melhoramento genético vegetal. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148910/1/ANAIS-SIMPOSIO-DE-RECURSOS-GENETICOS-2015-p-68.pdf
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Marc: |
LEADER 01146nam a2200193 a 4500
001 2054929
005 2016-10-18
008 2015 bl uuuu u00u1 u #d
100 1 $aCARVALHO, S. I. C. de
245 $aBanco ativo de germoplasma de tomate mantido na Embrapa Hortaliças.$h[electronic resource]
260 $aIn: SIMPÓSIO DE RECURSOS GENÉTICOS PARA A AMÉRICA LATINA E CARIBE, 10., 2015, Bento Gonçalves. Recursos genéticos no século 21: de Vavilov a Svalbard: anais... [s.l.]: Sociedade Brasileira de Recursos Genéticos, 2015. Editores técnicos: Rodrigo Cezar Franzon, Caroline Marques Castro, Alexandre Floriani Ramos, Sueli Correa Marques de Mello. SIRGEALC.$c2015
300 $ap. 68
520 $aO presente trabalho teve como objetivo relatar as principais atividades realizadas no BAG tomate (enriquecimento, multiplicação, caracterização e conservação) e sua aplicação dentro dos programas de melhoramento genético.
650 $aBanco de germoplasma
650 $aMelhoramento genético vegetal
653 $aSolanum lycopersicon
700 1 $aBOITEUX, L. S.
700 1 $aFONSECA, M. E. de N.
700 1 $aSILVA FILHO, J. G. da
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Embrapa Hortaliças (CNPH) |
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