Influence of salinity on transport of Nitrates and Potassium by means of the xylem sap content between roots and shoots in young tomato plants

Gallegos-Cedillo, Victor M.; Urrestarazu, Miguel; Álvaro, Juan E.

doi:10.4067/s0718-95162016005000072

Cited by 22 publications

(21 citation statements)

References 18 publications

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“…Adams (1991) and Sonneveld (2000) differentiated results between osmotic effects (adding NaCl) and the benefits of the increased EC with an equal balance of macronutrients. Their results for decreased water availability, and thus the reduction of root-pressure-driven xylem transport of water and solutes, are similar to the findings reported by Gallegos-Cedillo et al (2016).…”

Section: Resultssupporting

confidence: 86%

Increased Electrical Conductivity in Nutrient Solution Management Enhances Dietary and Organoleptic Qualities in Soilless Culture Tomato

Moya¹,

Oyanedel²,

Verdugo³

et al. 2017

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Greenhouse tomato production is shifting to meet emerging consumer needs. Increasing environmental concerns have pressured growers to supply high-quality vegetables using sustainable production methods. The utilization of adapting fertigation to production conditions and/or nutrient solutions of moderately high conductivity seems promising in providing high yields of superior quality while limiting the emission of nutrients to the environment in greenhouse tomato crops. A tomato crop was grown in soilless culture with various levels of electrical conductivity (EC), 2.2, 3.5, and 4.5 dS·m−1, adjusting the final nutrient concentration and maintaining nutritional balance. The effect of nutrient solutions with moderately high EC on fertigation parameters and the emission of nutrients to the environment, total crop productivity, distribution of fruit sizes, and dietary and organoleptic qualities were measured. Nutrient solutions of moderately high EC decreased total and commercial yield, with an average reduction from 5% to 19% and 3% to 22%, respectively. A considerable decrease in extra large and large fruits, with an average reduction from 69% to 42%, was also observed. Nonetheless, dietary-related metabolites were significantly increased at the highest EC values: lycopene (6.3%), ascorbic acid (8.8%), total phenolics content (8.3%), and total antioxidant activity (11.1%). EC values of 3.5 and 4.5 dS·m−1 are not widely used in commercial production but are frequently measured in drainage solutions in open hydroponic systems and discarded solutions in closed systems, mainly because of the use of poor-quality water and the accumulation of excess nutrients.

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Section: Resultssupporting

confidence: 86%

Increased Electrical Conductivity in Nutrient Solution Management Enhances Dietary and Organoleptic Qualities in Soilless Culture Tomato

Moya¹,

Oyanedel²,

Verdugo³

et al. 2017

horts

Self Cite

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“…The results in the present study showed that the rootstock did not influence NO 3 − content in the xylem sap of the tomato plants, but environmental conditions leading to different growth rates modified its content. These findings are supported by the data provided by Orieux et al [30], who showed that NO 3 − content in the xylem sap of Brassica napus increases when plants enhance their biomass accumulation rate. On the other hand, the results presented by Galleguillos-Cedillo et al [31] show a stable NO 3 − content in the xylem sap of tomato plants subjected to electrical conductivity values ranging from 2.2 to 12 dS m −1 , EC values that significantly affected the transpiration and, therefore, growth rate.…”

Section: Nitrate Content In the Xylem Sapsupporting

confidence: 85%

Nitrate Transport Rate in the Xylem of Tomato Plants Grafted onto a Vigorous Rootstock

et al. 2020

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Vigorous interspecific rootstocks increase nitrogen (N) uptake in tomato plants but limited information is available on xylem transport rate. Non-grafted and self-grafted tomato plants cv. Attiya and plants grafted onto an interspecific hybrid, Kaiser, were grown under growth chamber conditions and subjected to two light levels, 400 or 800 µmol PAR m−2 s−1. Plant water uptake, xylem sap NO3− content, and stem hydraulic conductance (ks) were measured after two weeks of growth. Xylem vessel number and diameter were evaluated in cross-sectional stem cuts and the theoretical xylem hydraulic conductance (kh) was calculated. Only the light level modified the xylem NO3− content. Grafting reduced ks by 84% in comparison to non-grafted plants. The water uptake rate and xylem sap NO3− content were 4.02 ± 0.66 g H2O kg−1 DW h−1 and 12.78 ± 1.16 mM, respectively, across all grafting treatments. The rootstock has a higher kh because the vessel diameter is 79.3 ± 14.4 µm while in non-grafted plants it is 62.0 ± 10.1 µm. Nitrate concentration and transport rate changes accordingly to the plant’s growth rate. The vigorous rootstock relies on larger vessels to supply the required amounts of N.

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“…It is important to pay special attention to the economic results of the exploitation of resources and the care of the environment. There are numerous studies on the response of the tomato to salinity using different soilless culture systems . However, comparative economic studies have not been conducted on the production of tomatoes using different soilless culture systems.…”

Section: Introductionmentioning

confidence: 99%

Cost–benefit analysis of tomato in soilless culture systems with saline water under greenhouse conditions

et al. 2019

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BACKGROUND The current need to produce food for a growing population, from diminishing natural resources, such as water and energy, and with minimum environmental degradation, demands the optimization of production. We compare the economic feasibility of tomato production in an open system with a perlite substrate, a closed system with the nutrient film technique (NFT), and a hydroponic crop (deep flow technique, DFT) using three levels of salinity that are found within the normal range for irrigation water quality in southeastern Spain. RESULTS Production with DFT resulted in an increase in the cost of phytosanitary treatments and the cost of maintenance. Production with perlite resulted in an increase in the cost of irrigation water and fertilization, and the use of NFT resulted in an increase in energy costs. The point of price equilibrium was exceeded in the three soilless systems when using low salinity water, and in perlite, with intermediate salinity water. CONCLUSION Profitability was reduced in the following order: perlite > NFT > DFT. There were positive results when using irrigation water with low salinity, and in the case of perlite, with intermediate salinity. In every case, salinity reduced the profitability of the operation, and this was greater when NFT was employed. The analysis of these soilless systems should be continued to determine the possibility of reducing cultivation costs. © 2019 Society of Chemical Industry

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Influence of salinity on transport of Nitrates and Potassium by means of the xylem sap content between roots and shoots in young tomato plants

Cited by 22 publications

References 18 publications

Increased Electrical Conductivity in Nutrient Solution Management Enhances Dietary and Organoleptic Qualities in Soilless Culture Tomato

Increased Electrical Conductivity in Nutrient Solution Management Enhances Dietary and Organoleptic Qualities in Soilless Culture Tomato

Nitrate Transport Rate in the Xylem of Tomato Plants Grafted onto a Vigorous Rootstock

Cost–benefit analysis of tomato in soilless culture systems with saline water under greenhouse conditions

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