Salt-induced changes on H+-ATPase activity, sterol and phospholipid content and lipid peroxidation of root plasma membrane from dwarf-cashew (Anacardium occidentale L.) seedlings

Alvarez‐Pizarro, Juan Carlos; Gomes-Filho, Enéas; Lacerda, Claudivan Feitosa de; Alencar, Nara Lídia Mendes; Prisco, José Tarquı́nio

doi:10.1007/s10725-009-9395-7

Cited by 36 publications

(29 citation statements)

References 51 publications

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“…H + ATPase). There are many examples highlighting importance of elevated sterol to phospholipid ratio in lipid bilayer to deal with the hypersaline condition which causes membrane rigidity and reduces NaCl permeability (Wu et al 2005;Kerkeb et al 2001;Alvarez-Pizarro et al 2009). Free sterols, particularly the more planer ones (e.g.…”

Section: Membranesmentioning

confidence: 99%

Signal Perception and Mechanism of Salt Toxicity/Tolerance in Photosynthetic Organisms: Cyanobacteria to Plants

Agrawal

Sen

Chatterjee

et al. 2015

Stress Responses in Plants

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High salt concentration represents one of the most significant abiotic constraints, affecting all life forms including plants and cyanobacteria. Soil salinity curtails plant growth by way of osmotic, ionic and oxidative stresses resulting in multiple inhibitory effects on various physiological processes such as growth, photosynthesis, respiration and cellular metabolism. In order to combat high salinity, various adaptive strategies employed include ion homeostasis achieved by ion transport and compartmentalization of injurious ions, osmotic homeostasis by accumulation of compatible solutes/osmolytes and upregulation of antioxidant defence mechanism. The aforesaid processes are executed through SOS and MAPK signalling pathways leading to modulation of gene expression. Salt stress signal transduction pathways initiate through sensing extracellular Na + ions causing modification of constitutively expressed transcription factors. This modification is responsible for expression of early transcriptional activators such as CBF/DREB gene family which eventually activate stress tolerance effector genes such as osmolyte biosynthesis genes, detoxification enzymes, and chaperones. Various genes/cDNAs encoding proteins involved in these adaptive mechanisms have been isolated and identified. Bioinformatic predictions through docking revealed interaction of salt across the species at conserved domains and motifs as a possible mechanism for response of a particular protein under salt stress. In this chapter, major aspects of salt stress are reviewed with emphasis on its detrimental consequences and biochemical and molecular mechanisms of signal transduction in plants and cyanobacteria under high salinity.

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Section: Membranesmentioning

confidence: 99%

Signal Perception and Mechanism of Salt Toxicity/Tolerance in Photosynthetic Organisms: Cyanobacteria to Plants

Agrawal

Sen

Chatterjee

et al. 2015

Stress Responses in Plants

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“…Adicionalmente, a relação K + /Na + pode ser considerada um critério de seleção de materiais sensíveis e tolerantes aos sais (Flowers, 2004;Parida e Das, 2005). O comprometimento do estado nutricional das plantas, em termos de K + , pelo aumento da absorção de Na + , sob estresse salino, é um fenômeno bastante conhecido (Azevedo Neto et al, 2004;Alvarez-Pizarro et al, 2009), mas não foi evidente neste estudo.…”

Section: Resultsunclassified

“…Os distúrbios nutricionais associados ao estresse salino podem resultar da redução da disponibilidade de nutrientes (pela competição na absorção e no transporte dentro da planta), da alteração da integridade estrutural e funcional da membrana plasmática, bem como da inibição da atividade de várias enzimas vitais do metabolismo (Mansour e Salama, 2004;Alvarez-Pizarro et al, 2009;Aragão et al, 2010). Dessa forma, a salinidade pode levar à deficiência de nutrientes essenciais e ao excesso de íons tóxicos nas plantas.…”

Section: Introductionunclassified

Nitrato modula os teores de cloreto e compostos nitrogenados em plantas de milho submetidas à salinidade

Feijão

Marques

Silva³

et al. 2013

Bragantia

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ResumoO objetivo deste trabalho foi estudar o efeito do nitrato no crescimento e no acúmulo de solutos inorgânicos e orgâ-nicos em plantas de milho submetidas à salinidade. O delineamento experimental foi o inteiramente casualizado, com cinco repetições, sob esquema fatorial 2×4, constando de oito tratamentos: dois níveis de salinidade (NaCl a 0 e 75 mM) e quatro concentrações de NO 3 -(0,5; 2,5; 5,0 e 7,5 mM) em sistema hidropônico. A massa seca da parte aérea e das raízes foi reduzida pela salinidade, porém isso foi menos evidente quando as plantas foram submetidas a concentrações de NO 3 -abaixo de 2,5 mM. O melhor crescimento das plantas foi observado na concentração aproximada de NO 3 -a 5,0 mM. Os teores de Na + e Cl -aumentaram com a salinidade em todos os órgãos estudados, havendo maior acúmulo desses íons nas raízes. De modo geral, os teores de K + foram pouco afetados por esse estresse. Com o aumento da concentração de NO 3 -no meio, houve melhora na absorção desse íon, levando à redução da absorção de Cl -e ao acúmulo de prolina e N-aminossolúveis. O estresse nutricional é mais limitante ao crescimento das plantas de milho que o estresse salino, cujos efeitos prejudiciais são minimizados por uma nutrição de NO 3 -adequada.Palavras-chave: estresse salino, nitrogênio, solutos inorgânicos e orgânicos, Zea mays. Nitrate modulates the contents of chloride and N-compounds in maize plants under salinity AbstractThis work aimed to study the effect of nitrate (NO 3 -) on growth and accumulation of inorganic and organic solutes in maize plants subjected to salinity. The experiment was carried out in a completely randomized design, with five replications, and a 2×4 factorial scheme, consisting of eight treatments: two salinity levels (NaCl at 0 or 75 mM) and four different concentrations of NO 3 -(0.5, 2.5, 5.0 or 7.5 mM) in nutrient solution. The dry mass of shoots and roots was reduced by salinity, however, this was less evident when plants were exposed to concentrations of NO 3 -below 2.5 mM. The best growth was observed in the approximate concentration of 5.0 mM NO 3 -. The Na + and Cl -contents increased with salinity in all organs studied, and the highest accumulation of these ions was observed in the roots. In general, the K + content was not severely affected by this stress. With the increase of NO 3 -concentration in the medium, there was an improvement in the absorption of this ion, leading to reduced uptake of Cl -and the accumulation of proline and soluble amino acids. Nutritional stress is more limiting to plant growth of maize than the salt stress, with harmful effects being alleviated by an adequate nutrition of NO 3 -.

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“…Nos últimos anos, algumas pesquisas foram realizadas com a finalidade de entender os efeitos do estresse salino no crescimento e no metabolismo de cajueiro anão precoce (ABREU et al, 2008;ALVAREZ-PIZARRO et al, 2009;MARQUES et al, 2013). Contudo, nessa espécie, estudos que relacionem as respostas das plantas à salinidade e o tempo de exposição a esse estresse são escassos.…”

Section: Introductionunclassified

Crescimento e acúmulo de íons em plantas de cajueiro anão precoce em diferentes tempos de exposição à salinidade

et al. 2013

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ResumoO objetivo deste trabalho foi avaliar a influência da duração do estresse salino no crescimento e no acúmulo de íons em plantas jovens de cajueiro anão precoce. Para isso, castanhas do clone CCP 06 foram semeadas em bandejas plásticas contendo vermiculita umedecida com solução nutritiva adicionada de NaCl, com condutividade elétrica variando entre 0,0 e 18,0 dS m AbstractThis work aimed to evaluate the influence of salt stress exposition on growth and ion accumulation in dwarf cashew plants. For this purpose, cashew nuts (CCP 06 clone) were sown in plastic trays containing vermiculite moistened with nutrient solution containing NaCl with electrical conductivities ranging from 0.0 to 18.0 dS m -1 . Plants were harvested after 30 and 60 days under salt stress. It was determined the shoot dry masses (SDM) and root (RDM), the SDM/RDM ratio, Na-and NO 3 -contents and the Na + and Cl -fluxes for whole plant in the period between two times of exposure to salt stress. The cashew growth was affected by salinity and by the exposure time to this stress, and the plants subjected to 60 days of stress were the most affected by NaCl. The Na + and Cl -contents increased in all plant tissues, while the NO 3 -content was reduced and K + content has not changed by salinity. The Na

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Salt-induced changes on H+-ATPase activity, sterol and phospholipid content and lipid peroxidation of root plasma membrane from dwarf-cashew (Anacardium occidentale L.) seedlings

Cited by 36 publications

References 51 publications

Signal Perception and Mechanism of Salt Toxicity/Tolerance in Photosynthetic Organisms: Cyanobacteria to Plants

Signal Perception and Mechanism of Salt Toxicity/Tolerance in Photosynthetic Organisms: Cyanobacteria to Plants

Nitrato modula os teores de cloreto e compostos nitrogenados em plantas de milho submetidas à salinidade

Crescimento e acúmulo de íons em plantas de cajueiro anão precoce em diferentes tempos de exposição à salinidade

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