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Alteração no potencial osmótico e teor de carboidratos solúveis em plantas jovens de lobeira (Solanum lycocarpum St.-Hil.) em resposta ao estresse hídrico Rev. Bras. Bot.
CHAVES FILHO,JALES TEIXEIRA; STACCIARINI-SERAPHIN,ELIANE.
Solanum lycocarpum é uma espécie típica da vegetação do cerrado brasileiro e tem demonstrado resistência à seca que ocorre em seu ambiente. O ajustamento osmótico é um decréscimo do potencial osmótico causado pelo acúmulo de solutos nas células, o qual mantém o gradiente de potencial hídrico e, ao mesmo tempo, a turgescência necessária ao crescimento celular. A influência do estresse hídrico no potencial osmótico e no teor de carboidratos solúveis foi investigada neste trabalho. A análise dos resultados mostrou que as plantas de Solanum lycocarpum apresentaram redução significativa nos valores de potencial osmótico em resposta ao estresse hídrico. O aumento no teor de carboidratos solúveis foi verificado em plantas sob condições estressantes em casa de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Osmotic adjustment; Water stress; "cerrado" vegetation; Savannah; Carbohydrate.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200010
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Alterações no perfil de frações nitrogenadas em calos de cana-de-açúcar induzidas por deficit hídrico. Repositório Alice
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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Changes in osmoregulatory metabolism of cotton genotypes during water deficit and recovery period. Repositório Alice
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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Changes in osmoregulatory metabolism of cotton genotypes during water deficit and recovery period AGRIAMBI
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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Correlation of proline content and gene expression involved in the metabolism of this amino acid under abiotic stress. Repositório Alice
BENITEZ, L. C. B.; VIGHI, I. L.; AULER, P. A.; AMARAL, M. N. do.; MORAES, G. P.; RODRIGUES, G. dos. S.; MAIA, L. C. da.; MAGALHAES JUNIOR, A. M. de; BRAGA, E. J. B..
2016
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Oryza sativa L; Abiotic stress; Osmotic adjustment; RT-qPCR.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1068291
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Differential expression of the genes involved in responses to water-deficit stress in peach trees cv. Chimarrita grafted onto two different rootstocks Bragantia
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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Drought tolerance and antioxidant enzymatic activity in transgenic ?Swingle? citrumelo plants over-accumulating proline. Repositório Alice
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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Ecophysiological responses to drought and salinity in the cosmopolitan invader Nicotiana glauca Braz. J. Plant Physiol.
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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Efeito do deficit hidrico no solo sobre o comportamento estomatico e potencial da agua em mudas de seringueira. Repositório Alice
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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Effects of Arbuscular Mycorrhiza on Osmotic Adjustment and Photosynthetic Physiology of Maize Seedlings in Black Soils Region of Northeast China BABT
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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Mitigating effect of salicylic acid and nitrate on water relations and osmotic adjustment in maize, cv. Lluteño exposed to salinity Ciencia e Investigación Agraria
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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Osmotic adjustment in Leymus cinereus cv. "Trailhead" under field conditions Phyton
Torres,YA; Busso,CA; Montenegro,OA; Giorgetti,HD; Rodríguez,HD; Bentivegna,D.
Osmotic adjustment has been recognized to be an important adaptive response to water stress in higher plants. Although Leymus cinereus cv. "Trailhead" is reputedly a very drought-tolerant rangeland plant, its ability to adjust osmotically in the field has not previously been reported. This study examined the occurrence or not of osmotic adjustment in field-grown plants of Leymus cinereus cv. "Trailhead" during late spring in an arid zone of Patagonia. Plants of this species had been established in the field three years before. With this purpose, leaf laminae of this species were collected and pressure-volume curves made. Results showed turgor maintenance in the face of declining leaf water potentials (i.e., osmotic adjustment) in the study species. Even...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Osmotic adjustment; Leymus cinereus cv. "Trailhead"; Water stress; Patagonia.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200013
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Osmotic adjustment in roots and leaves of two sorghum genotypes under NaCl stress Braz. J. Plant Physiol.
Lacerda,Claudivan Feitosa de; Cambraia,José; Oliva,Marco Antonio; Ruiz,Hugo Alberto.
Seedlings of two sorghum genotypes [Sorghum bicolor (L.) Moench], one salt tolerant (CSF 20) and the other salt sensitive (CSF 18) were grown in nutrient solution containing 0, 50 and 100 mmol.L-1 NaCl for seven days and the osmotic potential (Ys) and the contribution of organic and inorganic solutes to the Ys were determined in the leaves and roots. Salinity reduced the Ys of the cellular sap of leaves and roots in both genotypes, mainly in the salt sensitive one. The higher decrease in the Ys in the salt sensitive genotype was mostly due to higher accumulation of Na+ and Cl- that probably exceeded the amount needed for the osmotic adjustment. Among the inorganic solutes, K+ contributed the most to the Ys in control unstressed seedlings, but its...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ions; Organic solutes; Osmotic adjustment; Salinity; Sorghum bicolor.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200007
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Productivity and drought tolerance of cassava cultivars in the Coastal Tablelands of Northeastern Brazil Ciência Rural
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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Response to water deficit of Nothofagus dombeyi plants inoculated with a specific (Descolea antárctica Sing) and non-specific (Pisolithus tinctorious (Pers.) Coker & Couch) ectomycorrhizal fungi RChHN
ALBERDI,MIREN; ÁLVAREZ,MARICEL; VALENZUELA,EDUARDO; GODOY,ROBERTO; OLIVARES,ERICK; BARRIENTOS,MÓNICA.
The influence of the specific Descolea antárctica {Da) and the non-specific Pisolithus tinctorious {Pt) ectomycorrhizal fungi on some physiological leaf parameters of the Chilean evergreen Nothofagus dombeyi subjected to a low soil water potential (-1.6 to -1.9 MPa in a growth chamber for 35 days) and a high water potential (-0.07 to -0.09 MPa, control) was studied. Drought decreased the water status and increased carbohydrates in mycorrhizal and non-mycorrhizal plants, appearing Z)a-mycorrhizal and non mycorrhizal plants better osmotically adjusted (OA= 0.60 MPa and 0.52 MPa, respectively) than ft-mycorrhizal (0.39 MPa). Proline is not involved in the O A of mycorrhizal plants. The inoculation of N. dombeyi with both ectomycorrhizal fungi favored a better...
Tipo: Journal article Palavras-chave: Nothofagus dombeyi; Ectomycorrhizal fungi; Water deficit; Osmotic adjustment; Performance of the PS II.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400009
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Silicon foliar application attenuates the effects of water suppression on cowpea cultivars Ciência e Agrotecnologia
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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