Ajustamento Osmótico Em Mudas De Jatobá Submetidas À Salinidade Em Meio Hidropônico

Nascimento, Hugo Henrique Costa do; Santos, Cibele Alves dos; Freire, Clarissa Soares; Silva, Marcelle Almeida da; Nogueira, Rejane Jurema Mansur Custódio

doi:10.1590/0100-67622015000400006

Cited by 15 publications

(14 citation statements)

References 21 publications

(20 reference statements)

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“…Del Amor et al (2000) report that this nutrient can attenuate the effect of saline stress on cultures due to competition 152 Formation of soursop… VELOSO, L. L. S. A. et al in absorption between the nitrate and chloride ions, that an increase in nitrate concentration in the root zone may inhibit increased absorption of chloride by the plant. Additionally, the accumulation of these organic solutes inside the cell may increase the osmotic adjustment capacity of the plants, helping and favoring the increment of tolerance to certain levels of water and salt stress (NASCIMENTO et al, 2015) producing better-quality seedlings to plant the orchard, increasing the establishment rate at the field, which is of great importance, especially in the first months after planting, when they are subjected to more-adverse environmental conditions (OLIVEIRA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Formation of soursop seedlings irrigated using waters with different salinity levels and nitrogen fertilization

Veloso¹,

Nobre²,

Souza³

et al. 2018

Biosci. J.

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Using saline waters in agriculture has become common in many regions worldwide, but some techniques have been developed to enable the use of these waters in order not to harm the crop. Thus, this study aimed to evaluate the growth of soursop seedlings, cv. 'Morada Nova', under interaction between salt stress and nitrogen (N) fertilization. The experiment was conducted in a greenhouse in randomized block design, in 5 x 4 factorial scheme, with 4 replicates, formed by the combination of five levels of irrigation water electrical conductivity -ECw (0.3; 1.1; 1.9; 2.4 and 3.5 dS m -¹) and four N doses (70, 100, 130 and 160%). The dose relative to 100% corresponded to 100 mg of N dm -³ of soil. The interaction between N doses and water salinity levels did not affect the seedling production stage of soursop, cv. 'Morada Nova'. The growth of 'Morada Nova' soursop seedlings subjected to different water salinity levels was less affected in the initial stage (45 days after treatment application). Water with ECw of 2.0 dS m -¹ can be used to produce soursop seedlings, because it leads to an acceptable mean growth reduction of 10%. N doses higher than 70 mg dm -³ do not either attenuate salt stress or promote higher growth of soursop seedlings, cv. 'Morada Nova'.

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Section: Introductionmentioning

confidence: 99%

Formation of soursop seedlings irrigated using waters with different salinity levels and nitrogen fertilization

Veloso¹,

Nobre²,

Souza³

et al. 2018

Biosci. J.

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“…Nascimento (2009) reported that H. courbaril performs osmotic adjustment when exposed to water stress. Nascimento et al (2015) verified that jatobá plants in water deficit condition present a osmotic adjustment due to the increase of the turgor in the leaf. Stigonocarpa) due to the weather.…”

Section: Concentrations Of Proline and Glycine-betaine (Gb)mentioning

confidence: 72%

Osmoregulators in Hymenaea courbaril and Hymenaea stigonocarpa under water stress and rehydration

et al. 2017

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The objective of this work was to evaluate the effect of different water deficiency and rehydration levels on the concentrations of osmoregulators in two plant species (Hymenaea courbaril and H. Stigonocarpa) in the Amazon. We adopted a 2 9 5 9 5 factorial system, referring to 2 species (H. courbaril and H. stigonocarpa) and 5 stages of hydration and rehydration. The five hydration and rehydration stages were established in: (1) Control treatment E0; (2) Plants with 13 days of stress after incubation-E13; (3) Plants with 26 days of stress E26; (4) The plants that were established after 26 days after incubation and rehydrated for two days (RD2); (5) rehydrated for two days (RD4). The plants that were established after 26 days after incubation and rehydrated for four days. The experiment totaled fifty young plants with five replicates. Biochemical measurements were performed at the beginning of the experiment (E0) at 13 (E13) and 26 (E26) days after the water stress, in which the plants were rehydrated, repeating the analyses after two (RD2) and four (RD4) days. Both species increased the sucrose concentration by 18%, with a decrease of 52% in starch content. The RD4 time presented the highest mean starch concentration (0.19 mmol g -1 of the residue for H. courbaril and 0.27 mmol g -1 of residue for H. stigonocarpa). Increased proline concentrations were recorded for controls until RD2 for both species. For glycine betaine, the highest increases in treatments E26 and RD2 were observed for the H. courbaril species. Our rehydration period was not sufficient for total recovery of pre-stress concentrations of all studied solutes.

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“…Em relação ao K + observou -se declínio significativo na acumulação desse ião (43,21% para CNPAPM -X; 64,82% para CNPAPM -III) em folhas do tratamento mais severo quando comparado com o controle. A redução na concentração de K + com o aumento das concentrações salinas também foi observada em J. curcas por Silva et al (2009) e Cunha et al (2013), em maracujazeiro amarelo (Cruz et al, 2006), em jatobá (Nascimento et al, 2015) e em faveleira (Oliveira et al, 2012).…”

Section: Resultsunclassified

Padronização das doses de NaCl para indução de stresse salino em Jatropha curcas L.

et al. 2017

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O presente estudo propõe definir as doses consideradas severa e moderada de NaCl utilizadas em ensaios experimentais de Jatropha curcas com até oito dias após a sementeira. Os resultados apresentados nesse estudo baseiam-se em indicadores fenológicos e fisiológicos para definir as doses de NaCl a partir do conceito de dose letal. A pesquisa foi realizada utilizando delineamento experimental inteiramente casualizado com fatorial formado por dois acessos (CNPAPM-X e CNPAPM-III) e cinco doses de NaCl (0; 50; 100; 150; 200 mM de NaCl). Avaliou-se a taxa de germinação, altura da plântula, diâmetro do caule, massa seca e o conteúdo de Na + , K + além da razão K + /Na + de folhas, caules e raízes. Evidenciou-se nas condições experimentais impostas que os acessos apresentaram distintos mecanismos de resposta aos stresses salinos. Obteve-se, ainda, como dose severa e moderada, padronizadas para ensaios de stresse salino em J. curcas com até 8 dias após a sementeira, as doses de 100 e 50 mM, respectivamente.

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Ajustamento Osmótico Em Mudas De Jatobá Submetidas À Salinidade Em Meio Hidropônico

Cited by 15 publications

References 21 publications

Formation of soursop seedlings irrigated using waters with different salinity levels and nitrogen fertilization

Formation of soursop seedlings irrigated using waters with different salinity levels and nitrogen fertilization

Osmoregulators in Hymenaea courbaril and Hymenaea stigonocarpa under water stress and rehydration

Padronização das doses de NaCl para indução de stresse salino em Jatropha curcas L.

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