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Registro Completo |
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Biblioteca(s): |
Embrapa Acre; Embrapa Agricultura Digital; Embrapa Florestas. |
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Data corrente: |
21/07/2014 |
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Data da última atualização: |
29/12/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
STRASSBURG, B. B. N.; LATAWIEC, A. E.; BARIONI, L. G.; NOBRE, C. A.; PORFIRIO-DA-SILVA, V.; VALENTIM, J. F.; VIANNA, M.; ASSAD, E. D. |
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Afiliação: |
BERNARDO B. N. STRASSBURG, International Institute for Sustainability e PUC/RJ; AGNIESZKA E. LATAWIEC, International Institute for Sustainability / Opole University of Technology / University of East Anglia; LUIS GUSTAVO BARIONI, CNPTIA; CARLOS A. NOBRE, National Institute for Space Research; VANDERLEY PORFIRIO DA SILVA, CNPF; JUDSON FERREIRA VALENTIM, CPAF-AC; MURILO VIANNA, CNPTIA; EDUARDO DELGADO ASSAD, CNPTIA. |
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Título: |
When enough should be enough: improving the use of current agricultural lands could meet production demands and spare natural habitats in Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Global Environmental Change, v. 28, p. 84-97, 2014. |
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DOI: |
http://dx.doi.org/10.1016/j.gloenvcha.2014.06.001 |
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Idioma: |
Inglês |
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Conteúdo: |
Providing food and other products to a growing human population while safeguarding natural ecosystems and the provision of their services is a significant scientific, social and political challenge. With food demand likely to double over the next four decades, anthropization is already driving climate change and is the principal force behind species extinction, among other environmental impacts. The sustainable intensification of production on current agricultural lands has been suggested as a key solution to the competition for land between agriculture and natural ecosystems. However, few investigations have shown the extent to which these lands can meet projected demands while considering biophysical constraints. Here we investigate the improved use of existing agricultural lands and present insights into avoiding future competition for land. We focus on Brazil, a country projected to experience the largest increase in agricultural production over the next four decades and the richest nation in terrestrial carbon and biodiversity. Using various models and climatic datasets, we produced the first estimate of the carrying capacity of Brazil´s 115 million hectares of cultivated pasturelands. We then investigated if the improved use of cultivated pasturelands would free enough land for the expansion of meat, crops, wood and biofuel, respecting biophysical constraints (i.e., terrain, climate) and including climate change impacts. We found that the current productivity of Brazilian cultivated pasturelands is 32-34% of its potential and that increasing productivity to 49-52% of the potential would suffice to meet demands for meat, crops, wood products and biofuels until at least 2040, without further conversion of natural ecosystems. As a result up to 14.3 Gt CO2 Eq could be mitigated. The fact that the country poised to undergo the largest expansion of agricultural production over the coming decades can do so without further conversion of natural habitats provokes the question whether the same can be true in other regional contexts and, ultimately, at the global scale. MenosProviding food and other products to a growing human population while safeguarding natural ecosystems and the provision of their services is a significant scientific, social and political challenge. With food demand likely to double over the next four decades, anthropization is already driving climate change and is the principal force behind species extinction, among other environmental impacts. The sustainable intensification of production on current agricultural lands has been suggested as a key solution to the competition for land between agriculture and natural ecosystems. However, few investigations have shown the extent to which these lands can meet projected demands while considering biophysical constraints. Here we investigate the improved use of existing agricultural lands and present insights into avoiding future competition for land. We focus on Brazil, a country projected to experience the largest increase in agricultural production over the next four decades and the richest nation in terrestrial carbon and biodiversity. Using various models and climatic datasets, we produced the first estimate of the carrying capacity of Brazil´s 115 million hectares of cultivated pasturelands. We then investigated if the improved use of cultivated pasturelands would free enough land for the expansion of meat, crops, wood and biofuel, respecting biophysical constraints (i.e., terrain, climate) and including climate change impacts. We found that the current productivity of Brazil... Mostrar Tudo |
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Palavras-Chave: |
Actividades antropogénicas; Agricultura sustentable; Cambio climático; Increasing demand; Land sparing; Pastizales; Pasturelands; Rendimiento de los cultivos; Sustainable intensification; Sustentabilidade; Uso de la tierra. |
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Thesagro: |
Agricultura; Agricultura sustentável; Demanda; Impacto Ambiental; Mudança climática; Pastagem; Pastagem cultivada; Produção Agrícola; Rendimento; Uso da terra. |
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Thesaurus Nal: |
agriculture; Anthropogenic activities; Climate change; Crop yield; Environmental impact; Land use; Pastures; Sustainable agriculture. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152522/1/AP-When-enough-Strassburg-2014.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160321/1/25101.pdf
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Marc: |
LEADER 03802naa a2200565 a 4500
001 2059579
005 2016-12-29
008 2014 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.gloenvcha.2014.06.001$2DOI
100 1 $aSTRASSBURG, B. B. N.
245 $aWhen enough should be enough$bimproving the use of current agricultural lands could meet production demands and spare natural habitats in Brazil.$h[electronic resource]
260 $c2014
520 $aProviding food and other products to a growing human population while safeguarding natural ecosystems and the provision of their services is a significant scientific, social and political challenge. With food demand likely to double over the next four decades, anthropization is already driving climate change and is the principal force behind species extinction, among other environmental impacts. The sustainable intensification of production on current agricultural lands has been suggested as a key solution to the competition for land between agriculture and natural ecosystems. However, few investigations have shown the extent to which these lands can meet projected demands while considering biophysical constraints. Here we investigate the improved use of existing agricultural lands and present insights into avoiding future competition for land. We focus on Brazil, a country projected to experience the largest increase in agricultural production over the next four decades and the richest nation in terrestrial carbon and biodiversity. Using various models and climatic datasets, we produced the first estimate of the carrying capacity of Brazil´s 115 million hectares of cultivated pasturelands. We then investigated if the improved use of cultivated pasturelands would free enough land for the expansion of meat, crops, wood and biofuel, respecting biophysical constraints (i.e., terrain, climate) and including climate change impacts. We found that the current productivity of Brazilian cultivated pasturelands is 32-34% of its potential and that increasing productivity to 49-52% of the potential would suffice to meet demands for meat, crops, wood products and biofuels until at least 2040, without further conversion of natural ecosystems. As a result up to 14.3 Gt CO2 Eq could be mitigated. The fact that the country poised to undergo the largest expansion of agricultural production over the coming decades can do so without further conversion of natural habitats provokes the question whether the same can be true in other regional contexts and, ultimately, at the global scale.
650 $aagriculture
650 $aAnthropogenic activities
650 $aClimate change
650 $aCrop yield
650 $aEnvironmental impact
650 $aLand use
650 $aPastures
650 $aSustainable agriculture
650 $aAgricultura
650 $aAgricultura sustentável
650 $aDemanda
650 $aImpacto Ambiental
650 $aMudança climática
650 $aPastagem
650 $aPastagem cultivada
650 $aProdução Agrícola
650 $aRendimento
650 $aUso da terra
653 $aActividades antropogénicas
653 $aAgricultura sustentable
653 $aCambio climático
653 $aIncreasing demand
653 $aLand sparing
653 $aPastizales
653 $aPasturelands
653 $aRendimiento de los cultivos
653 $aSustainable intensification
653 $aSustentabilidade
653 $aUso de la tierra
700 1 $aLATAWIEC, A. E.
700 1 $aBARIONI, L. G.
700 1 $aNOBRE, C. A.
700 1 $aPORFIRIO-DA-SILVA, V.
700 1 $aVALENTIM, J. F.
700 1 $aVIANNA, M.
700 1 $aASSAD, E. D.
773 $tGlobal Environmental Change$gv. 28, p. 84-97, 2014.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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Biblioteca |
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Origem |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
07/11/2023 |
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Data da última atualização: |
26/01/2024 |
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Autoria: |
CAVASIN, P. Y.; GOMES, L. A. A.; PEREIRA, W. V. S.; SANTOS, H. O. DOS. |
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Afiliação: |
PEDRO YURI CAVASIN, UNIVERSIDADE FEDERAL DE LAVRAS; LUIZ ANTÔNIO AUGUSTO GOMES, UNIVERSIDADE FEDERAL DE LAVRAS; WILSON VICENTE SOUZA PEREIRA, UNIVERSIDADE FEDERAL DE LAVRAS; HELOISA OLIVEIRA DOS SANTOS, UNIVERSIDADE FEDERAL DE LAVRAS. |
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Título: |
Maternal effect on thermotolerance in lettuce seeds. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 58, e03298, 2023. |
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DOI: |
https://doi.org/10.1590/S1678-3921.pab2023.v58.03298 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Efeito materno na tolerância à termoinibição em sementes de alface. |
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Conteúdo: |
ABSTRACT - The objective of this work was to evaluate the occurrence of the maternal effect on thermotolerance in lettuce (Lactuca sativa) seeds, as well as to find an enzymatic marker for this trait in lettuce seedlings. Seeds from the Everglades thermotolerant cultivar, the Verônica susceptible cultivar, and their reciprocal hybrids were used. For each cultivar and reciprocal hybrid, germination percentage and vigor (germination speed index) tests were carried out at 20 and 32°C. Thermotolerance was defined as the capacity to germinate at 32°C. To obtain markers that could be associated with thermotolerance, enzymatic tests were performed. The bands of the electrophoretic enzymatic extracts were quantified using the ImageJ software. The hybrids behaved similarly to their female genitors. When cultivar Verônica was the female genitor, hybrid seeds did not germinate at high temperatures and showed a lower expression of the esterase enzyme. However, when the female genitor was the Everglades cultivar, hybrids showed a high germination at high temperatures and a greater esterase expression. Therefore, there is a maternal effect on tolerance to thermoinhibition in lettuce seeds, and the esterase enzyme can be used as a selective marker to identify homozygous progenies for this trait. RESUMO - O objetivo deste trabalho foi avaliar a ocorrência do efeito materno na tolerância à termoinibição em sementes de alface (Lactuca sativa), bem como encontrar um marcador enzimático para esta característica em mudas de alface. Foram utilizadas sementes da cultivar termotolerante Everglades, da cultivar suscetível Verônica e de seus híbridos recíprocos. Para cada cultivar e híbrido recíproco, foram conduzidos testes de germinação e vigor (índice de velocidade de germinação) a 20 e 32°C. A termotolerância foi definida pela capacidade de germinação a 32°C. Para encontrar marcadores que pudessem ser associados com a termotolerância, foram realizados testes enzimáticos. As bandas eletroforéticas dos extratos enzimáticos foram quantificadas por meio do programa ImageJ. Os híbridos apresentaram comportamento semelhante ao dos seus genitores femininos. Quando a cultivar Verônica foi o genitor feminino, as sementes dos híbridos não germinaram sob alta temperatura e apresentaram menor expressão da enzima esterase. Porém, quando a cultivar Everglades foi o genitor feminino, os híbridos apresentaram alta germinação sob temperatura elevada e maior expressão da esterase. Portanto, há efeito materno na tolerância à termoinibição em sementes de alface, e a enzima esterase apresenta potencial como marcador para identificar progênies homozigotas para essa característica. MenosABSTRACT - The objective of this work was to evaluate the occurrence of the maternal effect on thermotolerance in lettuce (Lactuca sativa) seeds, as well as to find an enzymatic marker for this trait in lettuce seedlings. Seeds from the Everglades thermotolerant cultivar, the Verônica susceptible cultivar, and their reciprocal hybrids were used. For each cultivar and reciprocal hybrid, germination percentage and vigor (germination speed index) tests were carried out at 20 and 32°C. Thermotolerance was defined as the capacity to germinate at 32°C. To obtain markers that could be associated with thermotolerance, enzymatic tests were performed. The bands of the electrophoretic enzymatic extracts were quantified using the ImageJ software. The hybrids behaved similarly to their female genitors. When cultivar Verônica was the female genitor, hybrid seeds did not germinate at high temperatures and showed a lower expression of the esterase enzyme. However, when the female genitor was the Everglades cultivar, hybrids showed a high germination at high temperatures and a greater esterase expression. Therefore, there is a maternal effect on tolerance to thermoinhibition in lettuce seeds, and the esterase enzyme can be used as a selective marker to identify homozygous progenies for this trait. RESUMO - O objetivo deste trabalho foi avaliar a ocorrência do efeito materno na tolerância à termoinibição em sementes de alface (Lactuca sativa), bem como encontrar um marcador enzimático para es... Mostrar Tudo |
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Thesagro: |
Alface; Dormência da Semente; Germinação; Hibrido; Lactuca Sativa; Progênie; Semente; Temperatura. |
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Thesaurus NAL: |
Esterases; Seed dormancy; Temperature. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1157917/1/Maternal-effect-thermotolerance-2023.pdf
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Marc: |
LEADER 03680naa a2200313 a 4500
001 2157917
005 2024-01-26
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/S1678-3921.pab2023.v58.03298$2DOI
100 1 $aCAVASIN, P. Y.
245 $aMaternal effect on thermotolerance in lettuce seeds.$h[electronic resource]
260 $c2023
500 $aTítulo em português: Efeito materno na tolerância à termoinibição em sementes de alface.
520 $aABSTRACT - The objective of this work was to evaluate the occurrence of the maternal effect on thermotolerance in lettuce (Lactuca sativa) seeds, as well as to find an enzymatic marker for this trait in lettuce seedlings. Seeds from the Everglades thermotolerant cultivar, the Verônica susceptible cultivar, and their reciprocal hybrids were used. For each cultivar and reciprocal hybrid, germination percentage and vigor (germination speed index) tests were carried out at 20 and 32°C. Thermotolerance was defined as the capacity to germinate at 32°C. To obtain markers that could be associated with thermotolerance, enzymatic tests were performed. The bands of the electrophoretic enzymatic extracts were quantified using the ImageJ software. The hybrids behaved similarly to their female genitors. When cultivar Verônica was the female genitor, hybrid seeds did not germinate at high temperatures and showed a lower expression of the esterase enzyme. However, when the female genitor was the Everglades cultivar, hybrids showed a high germination at high temperatures and a greater esterase expression. Therefore, there is a maternal effect on tolerance to thermoinhibition in lettuce seeds, and the esterase enzyme can be used as a selective marker to identify homozygous progenies for this trait. RESUMO - O objetivo deste trabalho foi avaliar a ocorrência do efeito materno na tolerância à termoinibição em sementes de alface (Lactuca sativa), bem como encontrar um marcador enzimático para esta característica em mudas de alface. Foram utilizadas sementes da cultivar termotolerante Everglades, da cultivar suscetível Verônica e de seus híbridos recíprocos. Para cada cultivar e híbrido recíproco, foram conduzidos testes de germinação e vigor (índice de velocidade de germinação) a 20 e 32°C. A termotolerância foi definida pela capacidade de germinação a 32°C. Para encontrar marcadores que pudessem ser associados com a termotolerância, foram realizados testes enzimáticos. As bandas eletroforéticas dos extratos enzimáticos foram quantificadas por meio do programa ImageJ. Os híbridos apresentaram comportamento semelhante ao dos seus genitores femininos. Quando a cultivar Verônica foi o genitor feminino, as sementes dos híbridos não germinaram sob alta temperatura e apresentaram menor expressão da enzima esterase. Porém, quando a cultivar Everglades foi o genitor feminino, os híbridos apresentaram alta germinação sob temperatura elevada e maior expressão da esterase. Portanto, há efeito materno na tolerância à termoinibição em sementes de alface, e a enzima esterase apresenta potencial como marcador para identificar progênies homozigotas para essa característica.
650 $aEsterases
650 $aSeed dormancy
650 $aTemperature
650 $aAlface
650 $aDormência da Semente
650 $aGerminação
650 $aHibrido
650 $aLactuca Sativa
650 $aProgênie
650 $aSemente
650 $aTemperatura
700 1 $aGOMES, L. A. A.
700 1 $aPEREIRA, W. V. S.
700 1 $aSANTOS, H. O. DOS
773 $tPesquisa Agropecuária Brasileira$gv. 58, e03298, 2023.
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