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Registro Completo |
Biblioteca(s): |
Biblioteca Rui Tendinha. |
Data corrente: |
19/01/2015 |
Data da última atualização: |
19/01/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VIEIRA, N. G.; CARNEIRO, F. A.; SUJII, P. S.; ALEKCEVETCH, J. C.; FREIRE, L. P.; VINECKY, F.; ELBELT, S.; SILVA, V. A.; MATTA, F. M. da; FERRÃO, M. A. G.; MARRACCINI, P.; ANDRADE, A. C. |
Afiliação: |
Maria Amélia Gava Ferrão, Incaper/Embrapa Café. |
Título: |
Different molecular mechanisms account for drought tolerance in Coffea canephora var. Conilon. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Tropical Plant Biology v. 6, p. 181-190, 2013. |
DOI: |
DOI 10.1007/s12042-013-9126-0 |
Idioma: |
Inglês |
Conteúdo: |
The effects of water deficit on photochemical parameters and expression of several candidate genes were investigated in drought-tolerant clone 73 of Coffea canephora submitted to slowly imposed water limitation. Under irrigation, this clone showed low values of stomatal conductance (g s ) and of CO2 assimilation rates (A) suggesting that it had a great efficiency in controlling stomatal closure and transpiration. After water withdrawal, this clone reached a ?3.0 MPa after 15 days without irrigation and showed a slow decrease in the pre-dawn leaf water potential. Under drought, the suppression of A was accompanied by maintenance of photochemical quenching (q P) and internal to ambient CO2 concentration (Ci/Ca) ratios as well as by a decrease of non-photochemical quenching (q N). This is confirmed by the transport rate/CO2 assimilation (ETR/A) rates that suggested the participation of an alternative electron sink protecting the photosynthetic apparatus against photoinhibition. At the transcriptomic level, high up-regulation of genes encoding for a dehydrin (CcDH3), an ascorbate peroxidase (CcAPX1), a prephenate-dehydrogenase like protein (CcPDH1) and a non-symbiotic haemoglobin (CcNSH1) was also observed upon drought suggesting a strong induction of antioxidant and osmoprotection systems in this clone. High expression levels of gene-encoding ABA receptors (CcPYL3 and CcPYL7) under water limitation were also observed suggesting the involvement of the ABA signaling pathway in response to drought. All these results where compared to those previously obtained for drought-tolerant clones 14 and 120. Our results demonstrated the existence of different mechanisms amongst the drought-tolerant coffee clones regarding water deficit. MenosThe effects of water deficit on photochemical parameters and expression of several candidate genes were investigated in drought-tolerant clone 73 of Coffea canephora submitted to slowly imposed water limitation. Under irrigation, this clone showed low values of stomatal conductance (g s ) and of CO2 assimilation rates (A) suggesting that it had a great efficiency in controlling stomatal closure and transpiration. After water withdrawal, this clone reached a ?3.0 MPa after 15 days without irrigation and showed a slow decrease in the pre-dawn leaf water potential. Under drought, the suppression of A was accompanied by maintenance of photochemical quenching (q P) and internal to ambient CO2 concentration (Ci/Ca) ratios as well as by a decrease of non-photochemical quenching (q N). This is confirmed by the transport rate/CO2 assimilation (ETR/A) rates that suggested the participation of an alternative electron sink protecting the photosynthetic apparatus against photoinhibition. At the transcriptomic level, high up-regulation of genes encoding for a dehydrin (CcDH3), an ascorbate peroxidase (CcAPX1), a prephenate-dehydrogenase like protein (CcPDH1) and a non-symbiotic haemoglobin (CcNSH1) was also observed upon drought suggesting a strong induction of antioxidant and osmoprotection systems in this clone. High expression levels of gene-encoding ABA receptors (CcPYL3 and CcPYL7) under water limitation were also observed suggesting the involvement of the ABA signaling pathway in re... Mostrar Tudo |
Palavras-Chave: |
Candidate gene; Coffea canephora; Drought; Gene expression; Real-time quantitative PCR; Water potential. |
Categoria do assunto: |
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Marc: |
LEADER 02676nam a2200325 a 4500 001 1004981 005 2015-01-19 008 2013 bl uuuu u0uu1 u #d 024 7 $aDOI 10.1007/s12042-013-9126-0$2DOI 100 1 $aVIEIRA, N. G. 245 $aDifferent molecular mechanisms account for drought tolerance in Coffea canephora var. Conilon. 260 $aTropical Plant Biology v. 6, p. 181-190$c2013 520 $aThe effects of water deficit on photochemical parameters and expression of several candidate genes were investigated in drought-tolerant clone 73 of Coffea canephora submitted to slowly imposed water limitation. Under irrigation, this clone showed low values of stomatal conductance (g s ) and of CO2 assimilation rates (A) suggesting that it had a great efficiency in controlling stomatal closure and transpiration. After water withdrawal, this clone reached a ?3.0 MPa after 15 days without irrigation and showed a slow decrease in the pre-dawn leaf water potential. Under drought, the suppression of A was accompanied by maintenance of photochemical quenching (q P) and internal to ambient CO2 concentration (Ci/Ca) ratios as well as by a decrease of non-photochemical quenching (q N). This is confirmed by the transport rate/CO2 assimilation (ETR/A) rates that suggested the participation of an alternative electron sink protecting the photosynthetic apparatus against photoinhibition. At the transcriptomic level, high up-regulation of genes encoding for a dehydrin (CcDH3), an ascorbate peroxidase (CcAPX1), a prephenate-dehydrogenase like protein (CcPDH1) and a non-symbiotic haemoglobin (CcNSH1) was also observed upon drought suggesting a strong induction of antioxidant and osmoprotection systems in this clone. High expression levels of gene-encoding ABA receptors (CcPYL3 and CcPYL7) under water limitation were also observed suggesting the involvement of the ABA signaling pathway in response to drought. All these results where compared to those previously obtained for drought-tolerant clones 14 and 120. Our results demonstrated the existence of different mechanisms amongst the drought-tolerant coffee clones regarding water deficit. 653 $aCandidate gene 653 $aCoffea canephora 653 $aDrought 653 $aGene expression 653 $aReal-time quantitative PCR 653 $aWater potential 700 1 $aCARNEIRO, F. A. 700 1 $aSUJII, P. S. 700 1 $aALEKCEVETCH, J. C. 700 1 $aFREIRE, L. P. 700 1 $aVINECKY, F. 700 1 $aELBELT, S. 700 1 $aSILVA, V. A. 700 1 $aMATTA, F. M. da 700 1 $aFERRÃO, M. A. G. 700 1 $aMARRACCINI, P. 700 1 $aANDRADE, A. C.
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Registro original: |
Biblioteca Rui Tendinha (BRT) |
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Registro Completo |
Biblioteca(s): |
Biblioteca Rui Tendinha. |
Data corrente: |
13/11/2015 |
Data da última atualização: |
29/02/2024 |
Autoria: |
GONRING, A. I.; SILVA, D. N. da.; SANTIAGO, M. C.; CASER, R. A.; LOSS, W. R. |
Afiliação: |
Antonio Irineu Gonring, EMCAPA/SEAG; Dalmo Nogueira da Silva, EMATER-ES/SEAG; Marcelo Carneiro Santiago; Roque Agostinho Caser, EMCAPA; Wolmar Roque Loss, EMCAPA/SEAG. |
Título: |
Proposta de aplicação de recursos na zona de influência da Companhia Vale do Rio Doce (Perfis de Projetos). |
Ano de publicação: |
1987 |
Fonte/Imprenta: |
Vitória, ES : SEAG, 1987. |
Páginas: |
95 p. |
Idioma: |
Português |
Conteúdo: |
A Secretaria de Agricultura do EspÃrito Santo a partir de 1984 passou a executar projetos com recursos da Companhia Vale do Rio Doce. Neste documento a SEAG propõe a continuidade de alguns projetos ja iniciados com o Fundo RDZRD e acrescenta novas proposições de intervenção visando o desenvolvimento integrado do EspÃrito Santo, particularmente na região de influência da CVRD. |
Palavras-Chave: |
Boa Esperança; Caprinocultura; Companhia Vale do Rio Doce; CVRD; Espírito Santo (Estado); Estradas vicinais; Implantação Parque Estadual da Cachoeira Fumaça; Parque Estadual da Fonte Grande (criação); Produção de sementes; Recuperação da Região de Forno Grande; Reflorestamento; VALE. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01373nom a2200313 a 4500 001 1009095 005 2024-02-29 008 1987 bl u u #d 100 1 $aGONRING, A. I. 245 $aProposta de aplicação de recursos na zona de influência da Companhia Vale do Rio Doce (Perfis de Projetos). 260 $aVitória, ES : SEAG$c1987 300 $a95 p. 520 $aA Secretaria de Agricultura do EspÃrito Santo a partir de 1984 passou a executar projetos com recursos da Companhia Vale do Rio Doce. Neste documento a SEAG propõe a continuidade de alguns projetos ja iniciados com o Fundo RDZRD e acrescenta novas proposições de intervenção visando o desenvolvimento integrado do EspÃrito Santo, particularmente na região de influência da CVRD. 653 $aBoa Esperança 653 $aCaprinocultura 653 $aCompanhia Vale do Rio Doce 653 $aCVRD 653 $aEspírito Santo (Estado) 653 $aEstradas vicinais 653 $aImplantação Parque Estadual da Cachoeira Fumaça 653 $aParque Estadual da Fonte Grande (criação) 653 $aProdução de sementes 653 $aRecuperação da Região de Forno Grande 653 $aReflorestamento 653 $aVALE 700 1 $aSILVA, D. N. da. 700 1 $aSANTIAGO, M. C. 700 1 $aCASER, R. A. 700 1 $aLOSS, W. R.
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