Solutos orgânicos em genótipos de sorgo forrageiro sob estresse salino

Oliveira, Luiz Antonio de; Barreto, Levy Paes; Neto, Egídio Bezerra; Santos, Mércia Virgínia Ferreira dos; Costa, Jordânia de Cássia Araújo

doi:10.1590/s0100-204x2006000100005

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…O aumento nos teores proteicos é de vital importância para as plantas uma vez que participam de sinalizações durante a diferenciação das células nos processos de desenvolvimento (Taiz & Zeiger, 2006). Oliveira et al (2006) também obtiveram resultados semelhantes ao avaliar o teor de solutos orgânicos em sorgo forrageiro sob estresse salino em que o aumento da condutividade elétrica do solo, de 2,4 para 16 dS m -1 , resultou no incremento de aproximadamente sete vezes o teor de proteínas solúveis no tecido foliar das plantas.…”

Section: Resultsunclassified

Uso de biofertilizantes e águas salinas em plantas de Licopersicon pimpinellifolium L.

Medeiros¹,

Cavalcante²,

Rodrigues³

et al. 2013

Agraria

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RESUMOUm experimento foi conduzido em abrigo telado do Departamento de Solos do Centro CCA -UFPB, Areia, PB, no período de maio a junho de 2008, com o objetivo de avaliar os efeitos de dois tipos de biofertilizantes no desenvolvimento da cultura do tomateiro-cereja sob irrigação com águas salinas. O delineamento experimental foi inteiramente casualizado em esquema fatorial 5 x 3, com seis repetições, referentes aos valores de condutividade elétrica da água de irrigação: 0,5; 1,0; 2,0; 3,0 e 4,0 dS m -1 , no solo sem biofertilizante, com biofertilizante comum e enriquecido com leite, melaço e gesso mineral. Depois de diluídos em água não salina (0,5 dS m -1 ) na razão de 1 : 1, os biofertilizantes foram aplicados dois dias antes da semeadura e o volume aplicado foi equivalente a 10% do volume do substrato. Os biofertilizantes elevaram mais a salinidade do solo que a água de irrigação; entretanto, atenuaram os efeitos prejudiciais da salinidade no crescimento das plantas e na produção de proteínas pelas mesmas. Palavras-chave: tomate-cereja, fermentado microbiano, salinidadeBiofertilizers and saline water use in cherry Licopersicon pimpinellifolium L. ABSTRACTAn experiment was carried out in the greenhouse of the Soil and Rural Engineering Department of CCA -UFPB, located in Areia county, State of Paraiba in Brazil, during the period of October to February, 2010, in order to evaluate the effects two types of bovine biofertilizers in the growth of tomatoes cherry plants under saline water irrigation. The experimental design was completely randomized in 5 x 3 factorial scheme, with six replications, referring to values of electrical conductivity of the irrigation water: 0.5; 1.0; 2.0; 3.0 and 4.0 dS m -1 , in the soil without biofertilizer, with ordinary biofertilizer and enriched with milk, molasses and mineral gypsum. The biofertilizers after dissolving in non-saline water (0.5 dS m -1 ) in a ratio of 1:1 were applied only one time, two days before sowing, in volume equivalent to 10% of the substrate volume. The addition of biofertilizers increased the contents of salts in the soil with higher intensity compared to treatments receiving only saline water but they exercised efficiently in attenuating the deleterious effects of salts to the plants, providing more growth and protein production in comparison to plants without biofertilizers.

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Section: Resultsunclassified

Uso de biofertilizantes e águas salinas em plantas de Licopersicon pimpinellifolium L.

Medeiros¹,

Cavalcante²,

Rodrigues³

et al. 2013

Agraria

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“…When testing the accumulation of proline in herbaceous cotton, beans and sorghum that were irrigated with water with electrical conductivity of up to 8.0 dS m -1 , Sousa et al (2010) verified that sorghum presented the lowest accumulation of proline (1.18 μmol g -1 ) and did not vary according to the level of electrical conductivity (salinity) of the water used in irrigation. The accumulation of proline in plants under saline stress conditions has also been reported in other crops, such as maize (Turan et al, 2009), rice (Lima et al, 2004), sorghum (Oliveira et al, 2006) and beans (Souza et al, 2011).…”

Section: Proline Productionmentioning

confidence: 56%

Mombaça Grass Responds to Partial Replacement of K+ by Na+ with Supplemental Ca2+ Addition in Low Fertility Soil

Carneiro¹,

Silva²,

Santos³

et al. 2017

JAS

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Partial replacement of potassium by sodium may be an alternative to reduce the cost of pasture fertilization and reduce the dependence on imported potassium sources. The objective of this study was to evaluate different sources and doses of calcium as enhancers of sodium effect on the partial replacement of potassium by sodium. Here, Mombaça grass (Megathyrsus maximus) was grown on low fertility soil. The experiment was conducted in a factorial (3 × 5) based on a completely randomized design with 4 replications as follow: three sources of Ca ) and two additional treatments (fertilization with 100% of K + without application of Ca 2+ and one control without any fertilization). Potassium was partially replaced (25%) by Na + prior to Ca 2+ additions. Plant height, growth rate, dry weight, Na + , K + , K + /Na + and shoot proline contents were evaluated as well as Na + levels and the electrical conductivity of the soil. The results show that the addition of Ca 2+ provided better plant development when K + was partially replaced by Na + and that the supply of Ca 2+ reduced the absorption of sodium by plants. The partial replacement of K + by Na + did not increase soil salinity or caused stress to the plants.

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“…The increased concentration of free aminoacids occurs primarily as a result of the increase in the biosynthesis of these compounds (Oliveira et al, 2006). Furthermore, protein degradation allows the recycling of free amino acids, leading to increase concentration of these compounds (Beltrão et al, 2007).…”

Section: Discusionmentioning

confidence: 99%

Biochemical response of Tachi-branco (Tachigali vulgaris L.G. Silva & H.C. Lima) in function of sources and doses of nitrogen

Simões¹,

Cardoso²,

Nascimento³

et al. 2017

Aust J Crop Sci

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This study aimed to evaluate the effects of application of nitrogen sources and doses in the biochemical response of seedlings of Tachigali vulgaris L. G. Silva & H. C. Lima. The seedlings were grown in pots containing 3 dm 3 of soil. Nitrogen sources such as urea [(NH₂)₂CO], ammonium nitrate (NH 4 NO 3 ), ammonium sulfate [(NH 4 ) 2 SO 4 ] and calcium nitrate [Ca (NO 3 ) 2 ] were tested in five doses of 0, 75, 150, 225 and 300 mg dm -³. They were applied as a solution in four portions, 25, 50, 75 and 100 days after transplanting. The experimental unit consisted of a vase and a randomized block design (RBD) in factorial scheme (4 × 5), corresponding to 4 sources and 5 doses, with four replications, totally 80 vessels. The biochemical analyzes were performed at the end of the experiment and nitrate levels, nitrate reductase enzyme activity, free ammonium, total soluble amino acids, total soluble proteins, carbohydrates, sucrose and chlorophylls were determined. There was a reduction in the concentration of protein in leaf and root, with the application of ammonium nitrate and calcium nitrate. The conversion of nitrate into the root in amino acids shown to be dependent to the oxidation of carbohydrates, causing the reduction of the concentration of this solute increases with the supply NO 3 -. The results showed that for production of Tachigali vulgaris seedlings the dose of 150 mg dm -3 of N, applied in a piecemeal manner, at 25, 50, 75 and 100 days of transplanting with the ammonium nitrate fertilizer can be recommended.

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Solutos orgânicos em genótipos de sorgo forrageiro sob estresse salino

Cited by 7 publications

References 17 publications

Uso de biofertilizantes e águas salinas em plantas de Licopersicon pimpinellifolium L.

Uso de biofertilizantes e águas salinas em plantas de Licopersicon pimpinellifolium L.

Mombaça Grass Responds to Partial Replacement of K+ by Na+ with Supplemental Ca2+ Addition in Low Fertility Soil

Biochemical response of Tachi-branco (Tachigali vulgaris L.G. Silva & H.C. Lima) in function of sources and doses of nitrogen

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