The effects of salt stress on growth, nitrate reduction and proline and glycinebetaine accumulation in Prosopis alba

Meloni, Diego Ariel; Gulotta, M. R.; Martínez, Carlos A.; Oliva, Marco Antônio

doi:10.1590/s1677-04202004000100006

Cited by 180 publications

(119 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, under salt-stress conditions, NO 3 -contents were significantly reduced in shoot, mainly in seedlings from non-aged and primed seeds ( Figure 4A). These results suggest that salt stress negatively affects shoot NO 3 -accumulation, which corroborates the results by Meloni et al (2004), who reported that salinity treatments in Prosopis alba also leads to shoot NO 3 -decreases. The Cl -content increased in seedling shoot from non-aged and artificially aged seeds subjected to salt stress, and these contents were highest as a function of seed priming (Figures 4C-D).…”

Section: Resultssupporting

confidence: 92%

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Oliveira

Alencar²,

Prisco³

et al. 2011

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

Although it has been known that the seed's physiological potential affects its response to osmoconditioning and abiotic stresses, researches involving seed aging and priming associated to abiotic stresses are scarce. The aim of this work was to evaluate the role of seed priming on salt tolerance in sorghum seedlings from seeds with two vigor levels (aged or non-aged) and to verify the organic and inorganic solute contributions as osmoregulators in NaClstressed seedlings from aged and primed seeds. The combinations of two seed vigor levels (aged or not), two seed types (primed or not) and two salinity levels (exposed to NaCl at 100 mM or not) were evaluated. In low physiological quality seeds (aged seeds), priming provided an attenuation of salinity's negative effects (0 or NaCl at 100 mM) on seedling growth. The accumulation of Na + and Cl -ions in NaCl-stressed sorghum seedling shoot from primed seeds indicate a plant osmotic adjustment induced by seed priming, which was efficient in reducing the osmotic stress caused by salinity. Proline was the main organic solute that contributed to osmoregulation in NaCl-stressed sorghum seedling shoot and its levels increased due to seed priming. Changes in inorganic and organic solute contents, in both shoot and roots, could have been induced by seed priming and as a function of salt stress tolerance, although the changes in these organs were poorly related to each other.

show abstract

Section: Resultssupporting

confidence: 92%

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Oliveira

Alencar²,

Prisco³

et al. 2011

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

show abstract

“…Generally, compatible solutes such as proline, sucrose, trehalose and polyols, and quaternary compounds such as glycinebetaine, protect plants from stress through different mechanisms, which include contributions to cellular osmotic adjustment, acceleration of reactive oxygen species scavenging systems, protection of membrane integrity, and stabilization of enzymes/ proteins (Ashraf and Foolad, 2007). Compatible solutes were originally thought to function as cytosolic osmotica involved in cellular osmoregulation (Hasegawa et al, 2000;Meloni et al, 2004). Consistent with this view, the increase in cellular osmolality that results from the accumulation of non-toxic, osmotically active solutes is accompanied by a reduced efflux of water from cells or even an influx of water into them, thus providing the turgor pressure necessary for cell expansion (Wyn Jones and Storey, 1978).…”

Section: Introductionmentioning

confidence: 99%

Glycinebetaine improves salt tolerance in vinal (Prosopis ruscifolia Griesbach) seedlings

Meloni

Martínez

2009

Braz. J. Plant Physiol.

View full text Add to dashboard Cite

Glycinebetaine (GB) is a very important organic osmolyte that accumulates in a number of diverse groups of plants in response to environmental stress. In some plants, increased resistance to drought, salinity and low temperature has been achieved through exogenous application of GB. In this study, the effect of exogenously applied GB (8 mM) on the ability of vinal (Prosopis ruscifolia G.) plants to withstand NaCl stress was investigated. The dry biomass of vinal showed a decrease under salt stress, but in GBtreated plants exposed to the same stress, this reduction was mitigated. Sodium accumulated in the leaves of plants grown under saline conditions, but the addition of GB to salt-grown plants reduced Na + content by 40%. Salinity significantly reduced the K + concentration in leaves to 65% that of non-salinized controls. In the presence of GB, leaf K + was comparatively higher, reaching as much as 90% of the control concentration. The sodium: potassium ratio in leaves was significantly higher in salt-stressed plants, but this ratio was lowered significantly by the addition of GB. When compared to control plants, NaCl stress increased malondialdehyde (MDA) concentrations by 95%, but GB application reduced the MDA concentration in these same NaCl-treated plants. In comparison to control plants, the activity of superoxide dismutase (SOD) increased by 52% in salt-stressed plants. The addition of GB to salttreated plants stimulated SOD activity twice that of the non-salizined control. These results suggest that, in addition to protecting membranes, GB-enhanced salinity tolerance in vinal may involve an antioxidant mechanism involving enhanced SOD activity and improving the ion homeostasis under conditions of high salinity.Key words: lipid peroxidation, salt stress, superoxide dismutase. resUMo glycinabetaine incrementa a tolerância a estresse salino em plântulas de vinal (Prosopis ruscifolia griesbach): Glycinabetaína (GB) é um dos osmólitos orgânicos mais importantes que se acumulam em diversas plantas em resposta a estresses ambientais. Em algumas espécies, o aumento a resistência à seca, salinidade ou baixa temperatura foram conseguidos pela aplicação exógena da GB. Neste estudo foi investigado o efeito de GB aplicado exogenamente (8 mM) na habilidade do vinal (Prosopis ruscifolia Griesbach) para suportar o estresse salino induzido por NaCl. A biomassa seca das plantas diminuiu por efeito do tratamento salino, mas aumentou em plantas tratadas com GB. O Sódio (Na + ) acumulou-se nas folhas das plantas crescidas sob estresse salino, mas a adição do GB às plantas tratadas com NaCl provocou uma diminuição de 40% no conteúdo de Na + . Em comparação às plantas controle, nas plantas tratadas com NaCl observou-se uma redução de 65% no conteúdo de potássio (K + ). Na presença do GB, a concentração de K + nas plantas sob estresse salino foi maior que nas plantas não tratadas com GB. A relação sódio: potássio aumentou significativamente Braz. J. Plant Physiol., 21(3): 233-241, 2009 234 DIEGO A. MELONI and CARLOS A....

show abstract

“…Farias et al (2009) claim that salinity reduces the activity of the ions in solution and alters the processes of absorption, transport, assimilation and distribution of nutrients in the plant. Among these ions, nitrate is the most affected (Aragão et al, 2010;Meloni et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Absorption of nutrients by cowpea irrigated with saline water under different leaching fractions

Tagliaferre

Guimarães

Gonçalves

et al. 2016

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

A B S T R A C TSalinity is one of the main environmental problems that negatively affect plant growth and metabolism, besides being one of the factors responsible for the decrease in the yield of crops, especially in arid and semiarid regions. Thus, the aim of this study was to evaluate the effects of soil salinity on the mineral nutrition of irrigated cowpea. The experiment was conducted in drainage lysimeters in a greenhouse, in a completely randomized design with seven treatments, one irrigated with freshwater (control) and six irrigated with saline water with different leaching fractions (5, 10, 15, 20, 30 and 40%) of the applied irrigation depth, with three replicates. The irrigation with saline water treatments did not affect significantly the contents of macronutrients and Na in the cowpea leaves, while the opposite behavior occurred with the micronutrients.Absorção de nutrientes pelo feijão caupi irrigado com água salina sob diferentes frações de lixiviação R E S U M OA salinidade constitui um dos principais problemas ambientais que afetam negativamente o crescimento e o metabolismo vegetal, além de ser um dos fatores responsáveis pelo decréscimo da produtividade das culturas, sobretudo nas regiões áridas e semiáridas. Objetivou-se com este estudo, avaliar os efeitos da salinidade do solo na nutrição mineral do feijão caupi irrigado. O experimento foi conduzido em lisímetros de drenagem, em casa de vegetação, no delineamento inteiramente casualizado com sete tratamentos constituídos de um irrigado com água doce (testemunha) e seis irrigados com água salina com diferentes frações de lixiviação (5, 10, 15, 20, 30 e 40%) da lâmina de irrigação aplicada e três repetições. A irrigação com água salina não influenciou de forma significativa as concentrações dos macronutrientes e de Na nas folhas do feijão caupi ocorrendo comportamento contrário com os micronutrientes.

show abstract

The effects of salt stress on growth, nitrate reduction and proline and glycinebetaine accumulation in Prosopis alba

Cited by 180 publications

References 54 publications

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Glycinebetaine improves salt tolerance in vinal (Prosopis ruscifolia Griesbach) seedlings

Absorption of nutrients by cowpea irrigated with saline water under different leaching fractions

Contact Info

Product

Resources

About