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

Moya, C.; Oyanedel, Eduardo; Verdugo, Gabriela; Flores, Marcelo; Urrestarazu, Miguel; Álvaro, Juan E.

doi:10.21273/hortsci12026-17

Cited by 48 publications

(47 citation statements)

References 35 publications

(62 reference statements)

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“…found that lycopene content remained unaffected in tomato fruit subjected to saline conditions, whereas Moya et al . reported opposite trends . These contradictory results could be attributed to the severity of salinity stress, since different NaCl levels were applied in those studies, and mild stress (4.5 dS m −1 ) seems to be beneficial to lycopene content of tomato fruit compared to more severe stress (6.0 dS m −1 ).…”

Section: Discussionsupporting

confidence: 94%

“…Moreover, salinity resulted in an increased level of TSS in tomato fruit prior to storage. The beneficial effects of salinity on the soluble solids content are in agreement with the reports of other investigators, although it is mentioned that such an increase could be the result of a concentration effect when results are expressed on a fresh weight basis rather than the actual increase of TSS …”

Section: Discussionsupporting

confidence: 91%

“…In particular, total phenols content decreased for all the tested Si treatments when salinity increased whereas -carotene increased. In contrast to our study, an increase in total phenols content has been reported for tomato fruit when grown under saline conditions, 58 while Chrysargyris et al recorded an increase of total phenols in lavender plants when subjected at salinity levels higher than 50 mmol L −1 NaCl or at non-saline conditions and with Si supplemenation. 19 Similarly to our study, Serio et al found that lycopene content remained unaffected in tomato fruit subjected to saline conditions, 45 whereas Moya et al reported opposite trends.…”

Section: Postharvest Applicationscontrasting

confidence: 99%

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Interactive effects of salinity and silicon application on Solanum lycopersicum growth, physiology and shelf‐life of fruit produced hydroponically

et al. 2019

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BACKGROUND Using water with high salinity for plant fertigation may have detrimental effects on plant development and total yield and on the quality of the crop produced. As a possible means to alleviate the negative effects of salinity, silicon (Si) can be incorporated in the nutrient solution supplied to plants. In the present study, hydroponically grown tomato (Solanum lycopersicum Mill.) plants were subjected to two different salinity levels (0 and 50 mmol L−1 NaCl) with and without the application of Si (0 and 2 mmol L−1 K2SiO3) in order to evaluate its possible positive impact on mitigation of salinity stress‐induced symptoms. An additional experiment was implemented with postharvest Si application (sodium silicate) to investigate effects on the shelf‐life of tomato fruit. RESULTS Salinity (50 mmol L−1 NaCl) decreased plant size, total yield and fresh fruit weight while a high percentage of blossom end rot symptoms of tomato fruit was also observed. The application of Si in the nutrient solution counteracted these detrimental effects, generating a higher yield and healthier fruit (lower blossom end rot incidence) compared to the untreated plants (no application of Si). Salinity improved several quality‐related traits in tomato fruit, resulting in higher marketability, whereas the addition of Si (pre‐ and postharvest) maintained fruit firmness following storage thereby increasing the shelf‐life of tomato fruit. CONCLUSIONS These findings indicate that Si application (pre‐ and postharvest) could provide an effective means of alleviating the unfavorable effects of using low‐quality water in plant fertigation on tomato plant development, fruit yield and post‐harvest quality, through increased fruit firmness. © 2019 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 91%

Section: Postharvest Applicationscontrasting

confidence: 99%

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Interactive effects of salinity and silicon application on Solanum lycopersicum growth, physiology and shelf‐life of fruit produced hydroponically

et al. 2019

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“…Our findings showed that SSC increased with increasing salinity levels in both years and for all lines. It has previously been reported that 86 mM NaCl increased SSC content [40]. This result is in also accordance with a previous study [41].…”

Section: Discussionsupporting

confidence: 93%

Increasing Ascorbic Acid Content and Salinity Tolerance of Cherry Tomato Plants by Suppressed Expression of the Ascorbate Oxidase Gene

et al. 2019

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eg (M.I.A.M.) 2 INRA, UR1052, Génétique et amélioration des fruits et légumes, DomaineAbstract: Ascorbic acid is considered to be one of the most important antioxidants in plants and plays a vital role in the adaptation of plants to unfavorable conditions. In the present study, an ascorbate oxidase gene (Solyc04g054690) was over-expressed in cherry tomato cv. West Virginia 106 lines and compared with previously studied RNAi silenced ascorbate oxidase lines. Two lines with lower ascorbate oxidase activity (AO−15 and AO−42), two lines with elevated activity (AO+14 and AO+16), and the non-transgenic line (WVa106) were grown and irrigated with 75 mM and 150 mM NaCl in 2015 and 2016. Growth, yield, and chemical composition of the lines under salinity stress were evaluated. Lines with lower ascorbate oxidase activity resulted in higher plant growth parameters (plant height, leaf number, flower, and cluster number in 2015 and stem diameter and flower number in 2016), and improved fruit quality (firmness in 2016 and soluble solid content in 2015) and total yield per plant under salinity stress over both years. In addition, we show that ascorbic acid, lycopene, and carotene contents of fruits were higher in lines with lower ascorbate oxidase activity compared to lines with elevated activity and the non-transgenic line under conditions of moderate and high salinity in both years. cancer, including prostate, colon, and breast cancers [4]. Tomato fruits have a considerable amount of ascorbic acid (AA) (or vitamin C), which ranged from 84 to 590 mg/kg [5,6]. In addition, nearly one hundred grams of tomato can provide 40% of the recommended amount of AA for an adult's daily nutritional requirements. AA is considered to be one of the most abundant antioxidants found in the plant, including the apoplast [7]. There are several factors affecting AA levels in plants, such as the genetic background, environmental conditions, seasons, and abiotic stress, such as drought and salinity [8]. Previous work showed that application of exogenous AA leads to increased salt tolerance in tomato [2]. It was reported that breeders should be developing horticultural crops with high ascorbic acid content [9]. In plants, ascorbic acid is oxidized by ascorbate oxidase (AO) (an apoplastic enzyme) to mono-dehydroascorbate (MDHA) [10].The activity of AO plays a role in regulating the redox state (the ratio of reduced to total AA) of the apoplast [11]. A positive relationship has been found between the level of AO activity and abiotic stress tolerance. AO is also highly expressed in fruits and roots of tomato [12].Under-expression of the AO enzyme often leads to increased abiotic stress tolerance, such as to drought in tomato [11] and to salt in Arabidopsis and tobacco [13]. By contrast, the over-expression of AO leads to increased sensitivity to stress [7].In a previous study [11], West Virginia 106 cherry tomato cotyledons were transformed to create two RNAi silenced lines (AO−15 and AO−42) with lower AO activity. In this work, the authors found that t...

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“…The drainage parameters of the resulting pH, EC, and percentage of volume of fertigation and drainage are commonly used in the practical control of soilless culture (Gorbe and Calatayud, 2010;Moya et al, 2017;Rodríguez et al, 2015;Urrestarazu et al, 2008). Figure 1 shows a graph of the pH and EC values as a function of the acid dose added to a standard nutrient solution with 2.0 mM bicarbonate from the irrigation water.…”

Section: Resultsmentioning

confidence: 99%

Effect of pH and Silicon in the Fertigation Solution on Vegetative Growth of Blueberry Plants in Organic Agriculture

Gallegos-Cedillo¹,

Álvaro²,

Capatos³

et al. 2018

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The effect of pH and silicon (Si) in the nutrient solution on the vegetative development of 2-year-old blueberry plants (Vaccinium corymbosum L. cv. Ventura) was studied. Two independent experiments were performed on coir fiber (CF) and sand as substrates. In experiment 1, Si was applied in the nutrient solution at a dose of 0.0, 0.3, 0.6, and 1.2 mM. In experiment 2, plants were treated with nutrient solution at pH 4.00, 4.75, 5.50, and 6.25, using two sources of acidification: nitric acid and citric acid. The parameters of plant growth, foliar surface, and stem biomass were measured. With the application of 1.2 mM Si to CF, plant height registered a significant increase of 8%, and shoot dry and fresh biomass increased by 21% and 25%, respectively. The results of experiment 1 indicated that the application of Si benefits the vegetative growth of blueberry plants in CF, but no effect was observed in the sand substrate. In the results of experiment 2, the pH level of 6.25 in CF decreased the dry weight of stems and leaves by 21% and 18%, respectively. A significant increase in the pH range of 4.00 to 5.50 was recorded in both the citric acid and nitric acid treatments, but these significant effects were not found in sand. Citric acid presented a similar behavior to nitric acid, which indicates that it can be a good source of acidification in organic and ecologically friendly crops.

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

Cited by 48 publications

References 35 publications

Interactive effects of salinity and silicon application on Solanum lycopersicum growth, physiology and shelf‐life of fruit produced hydroponically

Interactive effects of salinity and silicon application on Solanum lycopersicum growth, physiology and shelf‐life of fruit produced hydroponically

Increasing Ascorbic Acid Content and Salinity Tolerance of Cherry Tomato Plants by Suppressed Expression of the Ascorbate Oxidase Gene

Effect of pH and Silicon in the Fertigation Solution on Vegetative Growth of Blueberry Plants in Organic Agriculture

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