Nitrate Content and Expression of Putative Nitrate Transporter Genes in Lettuce Fertilized with Nitrogen Fertilizers

Razgallah, Nesrine; Abid, Ghassen; Chikh-Rouhou, H.; Hassen, Abdennaceur; Mahmoud, Mahmoud A.

doi:10.1080/19315260.2016.1227891

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…Because the timing of nutrient deprivation was earlier in the WN plants compared to in the NW plants, the WN plants underwent nutrient deficiency during a younger growth stage. Younger plant leaves contain lower nitrate levels than older leaves [31,32]. This indicates that younger plants might be more sensitive to nutrient deficiency due to the low nutrient stocks in their leaves.…”

Section: Effects Of Nutrient Deficiency Timing On the Growth Of Hydroponic Radishmentioning

confidence: 99%

Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish

2021

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In hydroponics, a continuous supply of mineral nutrients is essential for plant growth. However, constitutive nutrient-rich conditions also increase the nitrate content in the plants, which can be harmful to human health. Here, we investigated the effect of nutrient deficiency on the growth and component composition of hydroponic radish by changing the timing of nutrient removal from the hydroponic solution. Radish plants that were 14 days old were transferred to four different nutrient conditions for 14 days: nutrient deficiency for 14 days (WW), full nutrient for 14 days (NN), nutrient deficiency for the last 7 days (NW), and nutrient deficiency for the first 7 days (WN). After the treatments, the NW plants had similar taproot growth to NN plants. In contrast, the WN plants significantly reduced taproot growth. The WW plants reduced the shoot and taproot weight and their water contents. The nitrate content in the taproots was reduced in the NW and WW plants. The WW plants contained lower total phenol and higher ascorbic acid and sugar contents. These results suggest that the uptake of nutrient minerals at the young growth stage is important for the growth of radish taproot. Nutrient deficiency management can be one of the most effective tools for regulating radish growth and composition.

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Section: Effects Of Nutrient Deficiency Timing On the Growth Of Hydroponic Radishmentioning

confidence: 99%

Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish

2021

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“…В ряде экспериментов в разных странах было показано, что минимальное стабильное содержание нитратов обнаружено у сортов салата: Викор [22], Орфей [23], Валькирия [24], Великие озера [25], Атлет, Хрустящий витамин [26], cалатромэн [27], Red Grenoble, Bloody Warrior [28], Metalia [29], Corentine, Limeria [30]. Перечисленные сорта рекомендуют использовать в селекции для получения сортов салата с низким содержанием нитратов в продукции.…”

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Influence of nitrogen stress on nitrate accumulation and yield of lettuce varieties

Volkova

2023

Ovoŝi Rossii

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Relevance. Many authors note the existence of significant genotypic differences in the assimilation of nitrogen and the accumulation of nitrates by lettuce, point to the additive-dominant nature of the inheritance of the trait. The aim of the work was to evaluate the response of lettuce of various cultivars to mineral nutrition stress created against a nitrogen-deficient background (N0) and with an increased dose of nitrogen (N200).Material and Methods. In a microfield experiment on well-cultivated soddy-podzolic soil, a collection of lettuce varieties belonging to the main cultivated variety types was studied. The varieties differed in geographical origin, early maturity and morphological characteristics.Results. Differences in yield between varieties against the background of N200 were 4.5 times, and against the background of N0 – 5.7 times. Against an increased background of nitrogen nutrition, the highest yield – 2.22-2.64 kg/m2 was formed by the following varieties: All the Year, Quedlinburger Dickkopf, Berlin Yellow, Great lakes. Against a nitrogen-deficient background, Azart and Odessa Kucheryavets varieties stood out in terms of yield, which absorbed soil nitrogen better than others. The content of nitrates in lettuce plants of different varieties varied more strongly when grown on the background of N200 and ranged from 10.7 to 13.6 times (on average over 2 years – 11,2 times), on the control of N0 – 33 times. Varieties accumulating maximum NO3 under conditions of excess nitrogen nutrition were revealed. Lettuce Romaine (Lactuca romana) – 353 mg/kg and White paris cus (198 mg/kg) had a low content of NO3. The period of the maximum increase in biomass also corresponded to the maximum decrease in NO3 in plants. Power function equations were calculated to estimate the rate of change in biomass and NO3 content. The results indicate that there may be some scope for NO3 reduction in lettuce through cultivar selection or breeding.

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Evaluation of the plant growth-promoting activity of Pseudomonas nitroreducens in Arabidopsis thaliana and Lactuca sativa

Trịnh

Lee

et al. 2018

Plant Cell Rep

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Pseudomonas nitroreducens: strain IHB B 13561 (PnIHB) enhances the growth of Arabidopsis thaliana and Lactuca sativa via the stimulation of cell development and nitrate absorption. Plant growth-promoting rhizobacteria (PGPR) enhance plant development through various mechanisms; they improve the uptake of soil resources by plants to greatly promote plant growth. Here, we used Arabidopsis thaliana seedlings and Lactuca sativa to screen the growth enhancement activities of a purified PGPR, Pseudomonas nitroreducens strain IHB B 13561 (PnIHB). When cocultivated with PnIHB, both species of plants exhibited notably improved growth, particularly in regard to biomass. Quantitative reverse transcription polymerase chain reaction analysis indicated high expression levels of the nitrate transporter genes, especially NRT2.1, which plays a major role in the high-affinity nitrate transport system in roots. Moreover, enhanced activity of the cyclin-B1 promoter was observed when wild-type 'Columbia-0' Arabidopsis seedlings were exposed to PnIHB, whereas upregulation of cyclin-B also occurred in the inoculated lettuce seedlings. Overall, these results suggest that PnIHB improves A. thaliana and L. sativa growth via specific pathways involved in the promotion of cell development and enhancement of nitrate uptake.

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Nitrate Content and Expression of Putative Nitrate Transporter Genes in Lettuce Fertilized with Nitrogen Fertilizers

Cited by 6 publications

References 25 publications

Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish

Nutrient Deficiency Affects the Growth and Nitrate Concentration of Hydroponic Radish

Influence of nitrogen stress on nitrate accumulation and yield of lettuce varieties

Evaluation of the plant growth-promoting activity of Pseudomonas nitroreducens in Arabidopsis thaliana and Lactuca sativa

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