Effects of nitrate supply on plant growth, nitrate accumulation, metabolic nitrate concentration and nitrate reductase activity in three leafy vegetables

Chen, Baoming; Wang, Zhaohui; Sheng-xiu, LI; Wang, Gen‐Xuan; Song, Haixing; Wang, Xina

doi:10.1016/j.plantsci.2004.05.015

Cited by 219 publications

(141 citation statements)

References 61 publications

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“…So, there was a positive correlation between them (Ivashikina & Sokolov, 1997). Some investigations showed that a very small amount of nitrate is sufficient for induction (Matt et al, 2002) where NRA is not being induced when nitrate concentration was higher than a certain threshold level (Chen et al, 2004).…”

Section: Resultsmentioning

confidence: 95%

Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce

et al. 2015

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Leafy vegetables such as lettuce grown under different production systems may accumulate different concentrations of nitrate which may reach to the levels potentially toxic to humans. Moreover, nitrate accumulation varies in various plant parts and physiological age of the plant. Therefore, to determine the effect of production system and harvesting stage on nitrate accumulation and quality of butterhead lettuce, a study was conducted considering two lettuce production systems namely hydroponic and organic, and four different harvesting stages such as 35, 38, 41 and 44 days after transplanting (DAT). The experimental design was complete randomized design (CRD) with four replications. Hydroponic and organic systems performed similar in terms of yield, quality and nitrate content of butterhead lettuce. Delaying harvesting can not only increase yield but also can minimize nitrate accumulation and health hazard risk as well. Delay in harvesting stage may result in quality deterioration of lettuce and increased production cost. Thus, a compromise is necessary to consider 41 DAT as the optimum stage to harvest butterhead lettuce with significantly higher reduction of nitrate content in both outer adult leaf blades and young leaves of hydroponic lettuce. Fresh weight, firmness and color of butterhead lettuce at this stage were still acceptable.

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Section: Resultsmentioning

confidence: 95%

Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce

et al. 2015

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“…According to Knight et al (1987) vegetables are generally considered the main source of dietary nitrate in the human diet. Some vegetables, such as Swiss chard (Beta vulgaris L.) (Parks et al, 2008), rape (Brassica campestris L.), Chinese cabbage (Brassica chinensis L.), spinach (Spinacia oleracea L.) (Chen et al, 2004), lettuce (Lactuca sativa L.) (Huett and White, 1992) and salad rocket (Eruca sativa Mill.) (Cavaiuolo and Ferrante, 2014), contain nitrate at significant levels.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the nitrate and nitrite content of vegetables commonly grown in Slovenia

2017

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Nitrate (NO3 -) and nitrite (NO2 -) levels of a total 1195 samples of nine different vegetables (lettuce, potato, cabbage, carrot, string beans, tomato, cucumber, cauliflower and pepper) collected at several locations of an intensive agricultural area in Slovenia were analysed during a period of 13 years. The content of NO2 -and NO3 -ions in commercial mature samples was determined using a segmented flow analyser. The average NO3 -content was the highest in lettuce (962 mg/kg), cabbage (795 mg/kg), string beans (298 mg/kg), carrot (264 mg/kg), cauliflower (231 mg/kg), potato (169 mg/kg) and was moderately high in cucumber (93 mg/kg) and pepper (69 mg/kg). A low NO3 -content was found in tomato (<10 mg/kg). The average values of NO2 -did not exceed 0.5 mg/kg, with the exception of potato (1.08 mg/kg). Six samples of lettuce exceeded the maximum permissible level of NO3 -according to current European Union (EU) legislation. Based on the results of our investigation, we assessed the approximate daily intake (DI) of NO3 -and NO2 -to human body. The results indicated that with the consumption of potato, the daily intake per inhabitant is close to the acceptable DI permitted in EU.

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“…If fertilizer application exceeds plant demands and the denitrification capacity of the soil, nitrate not taken up by the crop may potentially contribute to ground and surface water pollution through nitrate leaching and soil erosion (Gastal and Lemaire, 2002;Wang et al 2002;Chen et al 2004;Almasri and Kaluarachchi, 2007 and references therein), possibly raising the nitrate concentrations in groundwater above the maximum allowed level of 50 mg L−1 set by the European Commission Nitrate Directive (91/676/EEC).…”

Section: Introductionmentioning

confidence: 99%

The effects of different plant densities and nitrogen levels on certain macro and micro element contents of okra

Yoldaş

Ceylan

Elmacı

et al. 2018

SJAFS

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Field trials were conducted in two locations: the training fields of the Ege University Odemis Vocational High School and Ege University, Menemen Research, Application and Production Farm, where the effects of different plant densities and nitrogen levels on macro and micro element contents of okra (Abelmoschus esculentus L.) were investigated. The experiments were conducted using a split-plot design with three replicates, where the main plots consisted of nitrogen applications and sub-plots of plant densities. Nitrogen fertilizers were applied in the form of urea and ammonium nitrate. Five different nitrogen levels (0, 40, 80, 120 and 160 kg N ha -1 ) and two different distances between rows (15 cm * 70 cm and 25 cm * 70 cm) were tested. Macro and micro nutrients in fruits and leaves were determined. The N content of the leaves increased with higher nitrogen levels in the Odemis location. The maximum nitrogen content in leaves was determined at the 80 kg N ha -1 application in this location. Additionally, the content of Mg, Zn, and Mn in the leaves and P, Ca, Mg, Fe, and Zn in fruits significantly affected nitrogen doses at the Odemis location. The Mg, Cu and Zn uptake of leaves and Zn content in fruit when compared to the control parcel significantly affected nitrogen doses at Menemen.

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Effects of nitrate supply on plant growth, nitrate accumulation, metabolic nitrate concentration and nitrate reductase activity in three leafy vegetables

Cited by 219 publications

References 61 publications

Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce

Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce

Evaluation of the nitrate and nitrite content of vegetables commonly grown in Slovenia

The effects of different plant densities and nitrogen levels on certain macro and micro element contents of okra

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