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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Unidades Centrais. |
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Data corrente: |
14/01/1997 |
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Data da última atualização: |
24/11/2011 |
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Autoria: |
DIAS-FILHO, M. B.; WISE, J. A.; DAWSON, T. E. |
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Afiliação: |
MOACYR BERNARDINO DIAS FILHO, CPATU; JAMES A. WISE, CORNELL UNIVERSITY; TODD E. DAWSON, CORNELL UNIVERSITY. |
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Título: |
Irradiance and water deficit effects on gas exchange behavior of two C3 Amazonian weeds. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 3, p. 319-325, mar. 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
The gas exchange behavior or two perennial weed species, a vine Ipomoea asarifolia (Desr.) Roem. & Schultz and a shrub Stachytarpheta cayennensis (L.C. Rich) Vahl., both common in the Brazilian Amazonia, was compared for plants grown under well watered and water limited conditions. Under well-watered conditions, light saturated rates of photosynthesis (A) and stomatal conductance (g) in I. asarifolia were, respectively, 15 and 83% higher than in S. cayennensis. When water stress was imposed, A and g in I. asarifolia declined, respectively, by 29 and 57% in relation to S. cayennensis. Dark respiration and light compensation point were similar on well-watered plants. Under water limited conditions, S. cayennensis had 60% higher dark respiration and 35% higherlight compensation point than I. asarifolia. The observed responses are in accord with the known distribution of the species in the field and may provide important information for designing differential management strategies for controlling these weeds. |
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Palavras-Chave: |
Amazon; Ipomoea asarifolia; Tropical pasture. |
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Thesagro: |
Stachytarpheta Cayennensis. |
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Thesaurus Nal: |
photosynthesis; stomatal conductance; water stress. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/47798/1/pab95-04-mar.pdf
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Marc: |
LEADER 01710naa a2200229 a 4500
001 1907160
005 2011-11-24
008 1995 bl uuuu u00u1 u #d
100 1 $aDIAS-FILHO, M. B.
245 $aIrradiance and water deficit effects on gas exchange behavior of two C3 Amazonian weeds.
260 $c1995
520 $aThe gas exchange behavior or two perennial weed species, a vine Ipomoea asarifolia (Desr.) Roem. & Schultz and a shrub Stachytarpheta cayennensis (L.C. Rich) Vahl., both common in the Brazilian Amazonia, was compared for plants grown under well watered and water limited conditions. Under well-watered conditions, light saturated rates of photosynthesis (A) and stomatal conductance (g) in I. asarifolia were, respectively, 15 and 83% higher than in S. cayennensis. When water stress was imposed, A and g in I. asarifolia declined, respectively, by 29 and 57% in relation to S. cayennensis. Dark respiration and light compensation point were similar on well-watered plants. Under water limited conditions, S. cayennensis had 60% higher dark respiration and 35% higherlight compensation point than I. asarifolia. The observed responses are in accord with the known distribution of the species in the field and may provide important information for designing differential management strategies for controlling these weeds.
650 $aphotosynthesis
650 $astomatal conductance
650 $awater stress
650 $aStachytarpheta Cayennensis
653 $aAmazon
653 $aIpomoea asarifolia
653 $aTropical pasture
700 1 $aWISE, J. A.
700 1 $aDAWSON, T. E.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 30, n. 3, p. 319-325, mar. 1995.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
09/01/2023 |
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Data da última atualização: |
09/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
BOLÍVAR-GONZÁLEZ, L.; MOLINA-BRAVO, R.; SOLANO-SÁNCHEZ, W.; ARAYA-VALVERDE, E.; IVAMOTO-SUZUKI, S. T.; PEREIRA, L. F. P.; GATICA-ARIAS, A. |
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Afiliação: |
ALEJANDRO BOLÍVAR-GONZÁLEZ, UNIVERSIDAD DE COSTA RICA; RAMÓN MOLINA-BRAVO, UNIVERSIDAD NACIONAL; WILLIAM SOLANO-SÁNCHEZ, CENTRO AGRONÓMICO TROPICAL DE INVESTIGACIÓN Y ENSEÑANZA; EMANUEL ARAYA-VALVERDE, CENTRO NACIONAL DE INNOVACIONES BIOTECNOLÓGICAS; SUZANA T. IVAMOTO-SUZUKI, INSTITUTO DE DESENVOLVIMENTO RURAL DO PARANÁ; LUIZ FILIPE PROTASIO PEREIRA, CNPCa; ANDRÉS GATICA-ARIAS, UNIVERSIDAD DE COSTA RICA. |
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Título: |
SNP markers found in non-coding regions can distinguish among low-variant genotypes of arabica and other coffee species. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Genetic Resources and Crop Evolution, Dec. 2022. |
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DOI: |
https://doi.org/10.1007/s10722-022-01498-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Development of efficient and scalable methods for molecular identification of Coffea spp. are necessary to accelerate studies related to the characterization of germplasm for both conservation or breeding purposes, and the validation of coffee germplasm. The low genetic diversity of coffee hinders the establishment of protocols that facilitate the molecular characterization of a given genotype. In this study, nucleotide variability was analyzed at 22 loci in the genome of 19 coffee accessions using de novo primer sets and high-resolution melting (HRM). Single nucleotide polymorphisms (SNPs) variants were studied in coding regions of genes implicated in sucrose accumulation in the seed, Sucrose synthase 2 (SUS2), Ent-kaurene oxidase 1 (CaKO1), and Caffeoyl-coenzyme A 3-O-methyltransferase (CcOAOMT). The non-coding Internal transcribed spacer 2 (ITS2) region was also studied. Variability was shown at 103 positions both at the interspecies level (15 loci) and among varieties of Coffea arabica L. (4 loci). The HMR technique for identification of variants in genes CaKO1, SUS2, CcoAOMT, as well as in the ITS2 region proved to be a robust technique for germplasm characterization. More important this technique can be used for fingerprinting and traceability of coffee grain exports which is an increasing market-consumer demand. |
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Thesagro: |
Coffea Arábica. |
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Thesaurus NAL: |
Genotype; Single nucleotide polymorphism. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1150820/1/SNP-markers-found-innon.pdf
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Marc: |
LEADER 02141naa a2200241 a 4500
001 2150820
005 2023-01-09
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10722-022-01498-0$2DOI
100 1 $aBOLÍVAR-GONZÁLEZ, L.
245 $aSNP markers found in non-coding regions can distinguish among low-variant genotypes of arabica and other coffee species.$h[electronic resource]
260 $c2022
520 $aDevelopment of efficient and scalable methods for molecular identification of Coffea spp. are necessary to accelerate studies related to the characterization of germplasm for both conservation or breeding purposes, and the validation of coffee germplasm. The low genetic diversity of coffee hinders the establishment of protocols that facilitate the molecular characterization of a given genotype. In this study, nucleotide variability was analyzed at 22 loci in the genome of 19 coffee accessions using de novo primer sets and high-resolution melting (HRM). Single nucleotide polymorphisms (SNPs) variants were studied in coding regions of genes implicated in sucrose accumulation in the seed, Sucrose synthase 2 (SUS2), Ent-kaurene oxidase 1 (CaKO1), and Caffeoyl-coenzyme A 3-O-methyltransferase (CcOAOMT). The non-coding Internal transcribed spacer 2 (ITS2) region was also studied. Variability was shown at 103 positions both at the interspecies level (15 loci) and among varieties of Coffea arabica L. (4 loci). The HMR technique for identification of variants in genes CaKO1, SUS2, CcoAOMT, as well as in the ITS2 region proved to be a robust technique for germplasm characterization. More important this technique can be used for fingerprinting and traceability of coffee grain exports which is an increasing market-consumer demand.
650 $aGenotype
650 $aSingle nucleotide polymorphism
650 $aCoffea Arábica
700 1 $aMOLINA-BRAVO, R.
700 1 $aSOLANO-SÁNCHEZ, W.
700 1 $aARAYA-VALVERDE, E.
700 1 $aIVAMOTO-SUZUKI, S. T.
700 1 $aPEREIRA, L. F. P.
700 1 $aGATICA-ARIAS, A.
773 $tGenetic Resources and Crop Evolution, Dec. 2022.
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Registro original: |
Embrapa Café (CNPCa) |
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