Production of Bambusa vulgaris seedlings from rhizomes under brackish water irrigation

Branco, Lourenço M. C.; Lacerda, Claudivan Feitosa de; Marinho, Albanise Barbosa; Sousa, Carlos Henrique Carvalho de; Calvet, Amanda Soraya Freitas; Oliveira, Erasto G. de

doi:10.1590/1807-1929/agriambi.v24n5p337-342

Cited by 2 publications

(2 citation statements)

References 22 publications

(17 reference statements)

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“…The first phenomenon that occurs in plants under salt stress is stomatal closure, caused by the decrease in osmotic potential of water in the soil, which hinders water absorption by the roots. Thus, stomatal closure ensures less water loss to the atmosphere, but also becomes a physical barrier to the entry of CO 2 into the mesophilic cells, reducing carboxylation rates to the lowest level (Branco et al, 2020). The findings described here corroborate Melo, Souza, Duarte, Cunha and Santos ( 2017), who reported a reduction in gs of bell pepper in response to the increase in ECw from 0 to 9 dS m -1 and highlighted that the gas exchange parameters were efficient to identify the deleterious effects of salinity on the crop.…”

Section: Resultsmentioning

confidence: 99%

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Veloso¹,

Lima²,

Silva³

et al. 2021

Semina: Ciênc. Agrár.

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The use of saline water for irrigation in semi-arid regions has become a reality due to the water scarcity that occurs in most of the year. In this scenario, exogenous application of salicylic acid may be a strategy to mitigate the deleterious effects of salt stress on plants and ensure the production of socioeconomically important crops in the semiarid region of Northeast Brazil, such as bell pepper. Thus, this study examines the osmoprotective effect of salicylic acid on gas exchanges, chloroplast pigments and production components of ‘All Big’ bell pepper plants irrigated with water with different saline levels. The experiment was carried out in greenhouse conditions in Campina Grande - PB, Brazil. Treatments consisted of four levels of electrical conductivity on the irrigation water (0.8, 1.6, 2.4 and 3.2 dS m-1) and four concentrations of salicylic acid (0, 1.2, 2.4 and 3.6 mM), which were distributed in a 4 × 4 factorial arrangement in a randomized block design with three replicates. Increases in irrigation water salinity from 0.8 dS m-1 resulted in changes in gas exchange and total chlorophyll levels of ‘All Big’ bell pepper plants. The estimated salicylic acid concentration of 1.7 mM reduced the effects of salinity on stomatal conductance, transpiration, CO2 assimilation rate, instantaneous carboxylation efficiency, total chlorophyll and fruit diameters. Irrigation with water of 1.8, 0.8 and 1.6 dS m-1 salinity associated with the estimated salicylic acid concentration of 1.6 mM increased the biosynthesis of chlorophylls a and b and the number of fruits, respectively, in bell pepper plants.

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Section: Resultsmentioning

confidence: 99%

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Veloso¹,

Lima²,

Silva³

et al. 2021

Semina: Ciênc. Agrár.

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“…No contexto do uso de águas salobras, é usual avaliar sintomas de estresse nas plantas através de análises fisiológicas sobre o aparato fotossintético e o rendimento fotoquímico, a exemplo das trocas gasosas (Branco et al, 2020;Batista et al, 2021) e fluorescência da clorofila (Zhu et al, 2017;. Isto porque, além de serem análises nãodestrutivas -que possibilitam visualizar informações sobre o processo fotossintético sem destruição da amostra -indicam possíveis adaptações da planta ao estresse, pois ajustes fisiológicos, bioquímicos e moleculares são necessários para a sobrevivência da planta em ambiente salino (Kalaji et al, 2016;Willadinho et al, 2017).…”

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Uso de condicionadores de substrato no cultivo do girassol ornamental irrigado com águas salobras

Martins¹

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Use of substrate conditioners in ornamental sunflower cultivation irrigated with brackish waterThe reduction of water offer has encouraged the search for strategies for economy and more efficient use in agricultural production. The use of water of inferior quality that has been used in conjunction with some techniques, such as the use of conditioners in the cultivation, an alternative that allows greater absorption and availability of water for plants. Given the above, the objective was to study irrigation with brackish water using substrate conditioners, analyzing the economic aspects of these conditioners and the physiological aspects of the ornamental sunflower crop, an agronomic species of high commercial movement due to the exuberance of its flowers and rapid economic return. The experiments were carried out between September 2020 and March 2021, in a protected environment on the premises of the "Luiz de Queiroz" College of Agriculture (ESALQ/USP), in the municipality of Piracicaba -SP (22º 42' S, 47º 38' W, 546 m of average altitude), and the treatments were allocated in an experimental design in randomized blocks, in a split-plot scheme with four replications. Two different experiments were carried out, one with 4 doses of hydrogel (0.0, 0.5, 1.0 and 1.5 g kg -1 ) and the other with 4 proportions of coconut fiber (0, 15, 20 and 25% of the substrate volume), both irrigated with 4 levels of electrical water conductivity (0.5, 2.0, 3.5 and 5.0 dS m -1 ), the two experiments obtained two cycles, one performed in spring (from September to December) and another in summer (from January to March). Physiological variables related to gas exchange and photochemical efficiency of the plants were analyzed, as well as the production through the shoot dry matter. These data were submitted to analysis of variance using an F test at 0.05 probability. Also, analyzes of fixed irrigation costs and variables of maintenance, labor, water, pumping and substrate were carried out jointly with analysis of growth through plant height and external diameter of the chapter. Among the main conclusions, it's highlighted that the use of both substrate conditioners in saline environment leads to improvements in the productive, physiological and growth aspects of ornamental sunflower plants, cv. Anão de jardim, not compensating the use of both without salinity. In economic aspects, as the amount of coconut fiber in the substrate increases, costs decrease, however, excess fiber did not improve plant growth and under electrical conductivity of 5.0 dS m -1 the results with fiber were not as expressive, while hydrogel, despite being more expensive, resulted in improvements at all doses for the four electrical conductivities analyzed.

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Production of Bambusa vulgaris seedlings from rhizomes under brackish water irrigation

Cited by 2 publications

References 22 publications

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Uso de condicionadores de substrato no cultivo do girassol ornamental irrigado com águas salobras

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