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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
04/12/2017 |
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Data da última atualização: |
04/12/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, R. L. da; SOUZA, E. H. de; VIEIRA, L. de J.; PELACANI, C. R.; SOUZA, F. V. D. |
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Afiliação: |
RONILZE LEITE DA SILVA, EFS; EVERTON HILO DE SOUZA, CAPES; LÍVIA DE JESUS VIEIRA, CAPES; CLAUDINÉIA REGINA PELACANI, UEFS; FERNANDA VIDIGAL DUARTE SOUZA, CNPMF. |
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Título: |
Cryopreservation of pollen of wild pineapple accessions. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Scientia Horticulturae, v.219, p.326-334, May 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Cryopreservation of pollen is an additional way to conserve many species. In particular, it can be used as an alternative strategy to preserve the genetic variation of the genus Ananas. The aim of this study was to cryopreserve pollen from wild pineapple accessions to conserve a gene pool of the genus Ananas, as well as to minimize problems of asynchronous flowering among accessions preserved in a germplasm bank. Accessions of all botanical varieties were used to investigate different protocols for freezing pollen, as well as to determine their viability in vitro/in vivo during the investigation and after freezing in liquid nitrogen. Anthers with pollen of the different accessions were dehydrated and then immersed in liquid nitrogen for periods of 24 h, 60 days and 120 days. After freezing, the viability percentage and pollen tube length were determined. In vivo viability tests were performed through 24 pollinations involving different accessions. The results showed that the cryopreservation of pollen was efficient, attaining in vitro germination rates ranging from 8.24% to 94.25%, with average of 62.67% achieved 120 days after cryopreservation and pollen tube lengths longer than 0.23 mm after this same period. In the in vivo pollinations with cryopreserved grains, the seed formation rate was 70.83% for the different combinations. It was possible to cryopreserve pollen from all the pineapple accessions investigated after dehydration for 6 h on silica gel, with significant in vitro germination percentages and production of viable seeds. MenosCryopreservation of pollen is an additional way to conserve many species. In particular, it can be used as an alternative strategy to preserve the genetic variation of the genus Ananas. The aim of this study was to cryopreserve pollen from wild pineapple accessions to conserve a gene pool of the genus Ananas, as well as to minimize problems of asynchronous flowering among accessions preserved in a germplasm bank. Accessions of all botanical varieties were used to investigate different protocols for freezing pollen, as well as to determine their viability in vitro/in vivo during the investigation and after freezing in liquid nitrogen. Anthers with pollen of the different accessions were dehydrated and then immersed in liquid nitrogen for periods of 24 h, 60 days and 120 days. After freezing, the viability percentage and pollen tube length were determined. In vivo viability tests were performed through 24 pollinations involving different accessions. The results showed that the cryopreservation of pollen was efficient, attaining in vitro germination rates ranging from 8.24% to 94.25%, with average of 62.67% achieved 120 days after cryopreservation and pollen tube lengths longer than 0.23 mm after this same period. In the in vivo pollinations with cryopreserved grains, the seed formation rate was 70.83% for the different combinations. It was possible to cryopreserve pollen from all the pineapple accessions investigated after dehydration for 6 h on silica gel, with significant in... Mostrar Tudo |
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Thesagro: |
Abacaxi. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02070naa a2200181 a 4500
001 2081351
005 2017-12-04
008 2017 bl uuuu u00u1 u #d
100 1 $aSILVA, R. L. da
245 $aCryopreservation of pollen of wild pineapple accessions.$h[electronic resource]
260 $c2017
520 $aCryopreservation of pollen is an additional way to conserve many species. In particular, it can be used as an alternative strategy to preserve the genetic variation of the genus Ananas. The aim of this study was to cryopreserve pollen from wild pineapple accessions to conserve a gene pool of the genus Ananas, as well as to minimize problems of asynchronous flowering among accessions preserved in a germplasm bank. Accessions of all botanical varieties were used to investigate different protocols for freezing pollen, as well as to determine their viability in vitro/in vivo during the investigation and after freezing in liquid nitrogen. Anthers with pollen of the different accessions were dehydrated and then immersed in liquid nitrogen for periods of 24 h, 60 days and 120 days. After freezing, the viability percentage and pollen tube length were determined. In vivo viability tests were performed through 24 pollinations involving different accessions. The results showed that the cryopreservation of pollen was efficient, attaining in vitro germination rates ranging from 8.24% to 94.25%, with average of 62.67% achieved 120 days after cryopreservation and pollen tube lengths longer than 0.23 mm after this same period. In the in vivo pollinations with cryopreserved grains, the seed formation rate was 70.83% for the different combinations. It was possible to cryopreserve pollen from all the pineapple accessions investigated after dehydration for 6 h on silica gel, with significant in vitro germination percentages and production of viable seeds.
650 $aAbacaxi
700 1 $aSOUZA, E. H. de
700 1 $aVIEIRA, L. de J.
700 1 $aPELACANI, C. R.
700 1 $aSOUZA, F. V. D.
773 $tScientia Horticulturae$gv.219, p.326-334, May 2017.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
22/09/2015 |
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Data da última atualização: |
30/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SOLAR, R. R. de C.; BARLOW, J.; FERREIRA, J.; BERENGUER, E.; LEES, A. C.; THOMSON, J. R.; LOUZADA, J.; MAUES, M.; MOURA, N. G.; OLIVEIRA, V. H. F.; CHAUL, J. C. M.; SCHOEREDER, J. H.; VIEIRA, I. C. G.; NALLY, R. M.; GARDNER, T. A. |
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Afiliação: |
Ricardo Ribeiro de Castro Solar, UFV; Jos Barlow, Lancaster University / MPEG; JOICE NUNES FERREIRA, CPATU; Erika Berenguer, Lancaster University; Alexander C. Lees, MPEG; James R. Thomson, University of Canberra / Arthur Rylah Institute for Environmental Research; Júlio Louzada, Lancaster University / UFLA; MARCIA MOTTA MAUES, CPATU; Nárgila G. Moura, MPEG; Victor H. F. Oliveira, Lancaster University / UFLA; Júlio C. M. Chaul, UFV; José Henrique Schoereder, UFV; Ima Célia Guimarães Vieira, MPEG; Ralph Mac Nally, University of Canberra; Toby A. Gardner, Stockholm Environment Institute / International Institute for Sustainability. |
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Título: |
How pervasive is biotic homogenization in human-modified tropical forest landscapes? |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Ecology Letters, v. 18, n. 10, p. 1108-1118, Oct. 2015. |
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DOI: |
10.1111/ele.12494 |
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Idioma: |
Inglês |
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Conteúdo: |
Land-cover change and ecosystem degradation may lead to biotic homogenization, yet our understanding of this phenomenon over large spatial scales and different biotic groups remains weak. We used a multi-taxa dataset from 335 sites and 36 heterogeneous landscapes in the Brazilian Amazon to examine the potential for landscape-scale processes to modulate the cumulative effects of local disturbances. Biotic homogenization was high in production areas but much less in disturbed and regenerating forests, where high levels of among-site and among-landscape β-diversity appeared to attenuate species loss at larger scales. We found consistently high levels of β-diversity among landscapes for all land cover classes, providing support for landscape-scale divergence in species composition. Our findings support concerns that β-diversity has been underestimated as a driver of biodiversity change and underscore the importance of maintaining a distributed network of reserves, including remaining areas of undisturbed primary forest, but also disturbed and regenerating forests, to conserve regional biota. |
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Palavras-Chave: |
Amazon forest; Cobertura da terra; Diversidade; Diversity partitioning; Land-cover change; Landscape divergence; Multi-taxa; Turnover. |
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Thesagro: |
Floresta. |
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Thesaurus NAL: |
Amazonia; nestedness. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02303naa a2200433 a 4500
001 2024699
005 2022-05-30
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1111/ele.12494$2DOI
100 1 $aSOLAR, R. R. de C.
245 $aHow pervasive is biotic homogenization in human-modified tropical forest landscapes?$h[electronic resource]
260 $c2015
520 $aLand-cover change and ecosystem degradation may lead to biotic homogenization, yet our understanding of this phenomenon over large spatial scales and different biotic groups remains weak. We used a multi-taxa dataset from 335 sites and 36 heterogeneous landscapes in the Brazilian Amazon to examine the potential for landscape-scale processes to modulate the cumulative effects of local disturbances. Biotic homogenization was high in production areas but much less in disturbed and regenerating forests, where high levels of among-site and among-landscape β-diversity appeared to attenuate species loss at larger scales. We found consistently high levels of β-diversity among landscapes for all land cover classes, providing support for landscape-scale divergence in species composition. Our findings support concerns that β-diversity has been underestimated as a driver of biodiversity change and underscore the importance of maintaining a distributed network of reserves, including remaining areas of undisturbed primary forest, but also disturbed and regenerating forests, to conserve regional biota.
650 $aAmazonia
650 $anestedness
650 $aFloresta
653 $aAmazon forest
653 $aCobertura da terra
653 $aDiversidade
653 $aDiversity partitioning
653 $aLand-cover change
653 $aLandscape divergence
653 $aMulti-taxa
653 $aTurnover
700 1 $aBARLOW, J.
700 1 $aFERREIRA, J.
700 1 $aBERENGUER, E.
700 1 $aLEES, A. C.
700 1 $aTHOMSON, J. R.
700 1 $aLOUZADA, J.
700 1 $aMAUES, M.
700 1 $aMOURA, N. G.
700 1 $aOLIVEIRA, V. H. F.
700 1 $aCHAUL, J. C. M.
700 1 $aSCHOEREDER, J. H.
700 1 $aVIEIRA, I. C. G.
700 1 $aNALLY, R. M.
700 1 $aGARDNER, T. A.
773 $tEcology Letters$gv. 18, n. 10, p. 1108-1118, Oct. 2015.
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