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| Registros recuperados: 16 | |
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| BRITO, L.K.F.L.; SILVEIRA, J.A.G.; LIMA, L.L.F. de; TIMÓTEO, A.R. de S.; CHAGAS, R.M.; MACEDO, C.E.C. de.. |
| O objetivo deste trabalho foi avaliar o uso de marcadores bioquímicos e fisiológicos, na caracterização do estresse hídrico em calos de cultivares de cana-de-açúcar (Sacharum sp.), RB 72 454 (sensível) e SP 813250 (resistente), contrastantes quanto à resistência à seca em campo. O delineamento experimental foi o inteiramente casualizado, em esquema fatorial de 2x5 [cultivar x doses de polietilenoglicol (PEG)], com dez tratamentos e três repetições. Os calos foram submetidos a concentrações de PEG correspondentes aos potenciais osmóticos de 0, -0,3, -0,6, -0,9 e -1,2 MPa, por 120 horas. A variação no conteúdo relativo de água e na umidade não foi significativamente diferente entre as cultivares. Entretanto, foi observada a tendência de aumento no vazamento... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Saccharum sp.; Ajustamento osmótico; Cultivo de calos; Solutos orgânicos; Osmotic adjustment; Callus culture; Compatible solutes. |
| Ano: 2008 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/111588 |
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| MACÊDO, E. C. F. de; ZONTA, J. H.; MELO, Y. L.; MELO, A. S. de; SILVA, D. C. da; ANDRADE, W. L. de.. |
| The aim of this study was to evaluate the changes in osmoregulatory metabolism of cotton genotypes subjected to water deficit and recovery period. In a greenhouse, six cotton genotypes and two water managements were combined in a 6 x 2 factorial scheme, in a completely randomized design, evaluated after 14 and 22 days under water stress and recovery conditions, respectively. The water status, growth indicators and compatible solutes in the leaves were evaluated. The genotypes BRS Seridó, BRS Aroeira and BRS 7MH withstand better the stress condition because they had lower variations in their water potentials due to the osmotic adjustment and maintained their growth under water deficit conditions. The BRS 286 is the most sensitive genotype to the water... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Osmotic adjustment; Compatible osmolytes; Ajustamento osmótico; Osmólito compatível; Gossypium Hirsutum; Seca; Drought. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118783 |
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| Macêdo,Érika C. F. de; Zonta,João H.; Melo,Yuri L.; Melo,Alberto S. de; Silva,Duval C. da; Andrade,Wellerson L. de. |
| ABSTRACT The aim of this study was to evaluate the changes in osmoregulatory metabolism of cotton genotypes subjected to water deficit and recovery period. In a greenhouse, six cotton genotypes and two water managements were combined in a 6 x 2 factorial scheme, in a completely randomized design, evaluated after 14 and 22 days under water stress and recovery conditions, respectively. The water status, growth indicators and compatible solutes in the leaves were evaluated. The genotypes BRS Seridó, BRS Aroeira and BRS 7MH withstand better the stress condition because they had lower variations in their water potentials due to the osmotic adjustment and maintained their growth under water deficit conditions. The BRS 286 is the most sensitive genotype to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum L.; Osmotic adjustment; Compatible osmolytes; Drought. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800607 |
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| Rickes,Leticia Neutzling; Klumb,Elsa Kuhn; Benitez,Letícia Carvalho; Braga,Eugenia Jacira Bolacel; Bianchi,Valmor João. |
| ABSTRACT Water deficit is responsible for a negative impact on agricultural systems. Several physiological, biochemical, and molecular processes are initiated as a response to water-deficit stress. Quantifying the differential expression of the genes involved in the response to water-deficit stress plays a key role in the development of molecular strategies for engineering water-stress tolerance in plants. Therefore, the present study aims to evaluate the expression of key genes involved in the water-deficit response process in peach trees cv. Chimarrita grafted onto two different rootstocks. The experimental design was completely randomized, with four treatments that correspond to the evaluation periods: day zero (control), the fourth, seventh, and ninth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prunus persica; Osmotic adjustment; Water stress; RT-qPCR; S6PDH; P5CS. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100060 |
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| CAMPOS, M. K. F. de; CARVALHO, K. de; SOUZA, F. S. de; MARUR, C. J.; PEREIRA, L. F. P.; BESPALHOK FILHO, J. C.; VIEIRA, L. G. E.. |
| In this study we investigated the effects of the high endogenous proline level on water relations, gas exchange and antioxidant enzymatic activity in leaves of transgenic ?Swingle? citrumelo rootstocks transformed with the P5CSF129A gene coding for the key-enzyme for proline synthesis, under water deficit. Leaf total water, osmotic and pressure potentials, stomatal conductance, photosynthetic rates and xylem sapflowwere evaluated in non-transformed control and transgenic plants during water deficit treatment. Malondialdehyde (MDA) content, catalase (CAT; EC 1.11.1.6), superoxide dismutase (SOD; EC 1.15.1.1) and ascorbate peroxidase (APX; EC 1.11.1.11) activities were quantified in leaves collected based on their total water potential, representing the... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Citrus rootstock; Drought tolerance; Osmotic adjustment; Oxidative stress; Proline. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/902435 |
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| González,Armando; Tezara,Wilmer; Rengifo,Elizabeth; Herrera,Ana. |
| Nicotiana glauca, a shrub native to southern South America, is widely distributed in the Americas, from Patagonia to the USA, from zero up to 3,700 m; it rapidly invades disturbed environments. In Venezuela, it has been reported from zero up to 2,000 m growing in contrasting conditions of relative humidity, temperature, rainfall, and salinity. In order to gain insight into the extent and mode of resistance to drought and salinity in N. glauca, we studied the effect of these factors on water relations and photosynthesis under both natural and greenhouse conditions. In the field, water potential, photosynthetic rate (A) and stomatal conductance (gs), but not relative water content (RWC) decreased because of drought. Manual removal of epicuticular wax... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drought; Osmotic adjustment; Salinity; Water deficit. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300008 |
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| BRUNINI, O.; CARDOSO, M.. |
| O objetivo deste trabalho foi avaliar o efeito do estresse hidrico sobre o potencial da agua na folha da seringueira, a resistencia estomatica, e a recuperacao do potencial de agua na folha. Progenies de polinizacao aberta de seringueira (Hevea spp.), provenientes dos clones IAN 873, RRIM 600, IAN 713 e de pes francos de Hbr, foram cultivadas sob condicoes controladas e submetidas a deficits hidricos crescentes no solo pela suspensao da irrigacao. Sob alta disponibilidade de agua no solo, a resistencia estomatica dos clones IAN 713 e IAN 873 era similar, porem inferior a dos demais. A baixos valores de disponibilidade hidrica no solo, a resistencia estomatica aumentou consideravelmente em todas progenies, e houve uma inversao de posicao entre o IAN 713 e o... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Ajuste osmotico; Teor de agua no solo; Estresse hidrico do solo; Potencial de agua nas folhas; Resistencia estomatica; Umidade de solo; Osmotic adjustment; Soil water content; Soil water deficit; Plant water potencial; Stomatal resistance; Soil moisture. |
| Ano: 1998 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/89520 |
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| Xu,Hongwen; Lu,Yan; Zhu,Xiancan. |
| ABSTRACT To investigate the effect of arbuscular mycorrhiza fungi on maize growth, osmoregulation substances and photosynthetic physiology, a popular maize variety ZD 958 was measured under potted condition. Arbuscular mycorrhiza (AM) symbiosis promoted plant growth, and enhanced plant height, leaf length, mean leaf width and dry weight. Higher soluble sugar and protein, but lower proline concentrations were detected in AM seedlings than corresponding non-AM seedlings. Quantum yield of PSII photochemistry and potential photochemical efficiency increased by arbuscular mycorrhiza fungi, meanwhile, AM plants had lower primary fluorescence but higher maximal fluorescence and variable fluorescence than non-AM plants. AM enhanced apparent quantum efficiency,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arbuscular mycorrhiza; Maize; Osmotic adjustment; Light response curve. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100435 |
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| Escobar,Hugo; Bustos,Richard; Fernández,Felipe; Cárcamo,Henry; Silva,Herman; Frank,Nicolás; Cardemil,Liliana. |
| We analyzed the mitigating effect of NO3 - and salicylic acid (SA) on the detrimental effects of salt stress by studying the water status of plants of maize grown in Hoagland's medium with NaCl 100 mM as the saline component, to which SA and NO3 - were added in different concentrations as mitigating agents. We evaluated water potential Ψw, osmotic potential Ψs, relative water content (RWC), turgor potential (Ψp ), and the osmotic adjustment (OA) of leaves and roots. SA 0.5 mM mitigated the effects of salinity by increasing the Ψw of the leaf, the Ψsof theroot, the Ψpof the leaf, RWC and OA of the leaf; while NO3 was only effective in combination with SA, mitigating the effects of salinity by increasing... |
| Tipo: Journal article |
Palavras-chave: Nitrate; Osmotic potential; Osmotic adjustment; Salinity mitigation; Salicylic acid; Water potential; Water relative content. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300006 |
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| Carvalho,Luciana Marques de; Carvalho,Hélio Wilson Lemos de; Oliveira,Ivênio Rubens de; Rangel,Marco Antônio Sedrez; Santos,Vanderlei da Silva. |
| ABSTRACT: Ten cassava cultivars were grown in the field and evaluated to identify the most adapted to the Coastal Tablelands of northeast Brazil. The cultivars showed differences in proline and chlorophyll contents, plant height, number of leaves and branches, canopy area and root production, however they did not differ on photosynthetic rates. Cultivars 'Tianguá' and '9783-13' presented lower root yield, whereas 'BRS Tapioqueira' and 'Irará' had the highest root yield. Few leaves coupled with the highest water use efficiency for CO2 assimilation was found in 'BRS Kiriris' in contrast to 'BRS Jarina' and '9783-13'. 'BRS Caipira' had high proline content in both Umbaúba and Frei Paulo areas, traits usually associated to drought tolerance, that contribute to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Adaptation; Osmotic adjustment; Photosynthesis; Chlorophyll. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500796 |
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| Silva,Duval Chagas da; Melo,Alberto Soares de; Melo,Yuri Lima; Andrade,Wellerson Leite de; Lima,Liziane Maria de; Santos,Anderson Reges. |
| ABSTRACT Silicon and proline play important physiological, metabolic and functional roles in plants, especially under water deficit conditions. Their application can mitigate the adverse effects of stress in crops by increasing water use efficiency and antioxidant activity. The objective of this study was to evaluate silicon (Si) as attenuator of the effects of water deficit on cowpea cultivars, through physiological, biochemical and growth indicators. The experimental design was randomized blocks with four cultivars (BRS Guariba, BRS Itaim, BRS Aracê and BRS Rouxinol) and four irrigation treatments associated or not with Si application (W100 - 100% ETo; W50 - 50% ETo; W50+100Si and W50+200Si, with 100 and 200 mg L-1 silicon, respectively), in a 4 x 4... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata (L.) Walp; Water deficit; Antioxidant enzymes; Osmotic adjustment. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100244 |
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| Registros recuperados: 16 | |
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