Screening for genotype and environment effects on nitrate accumulation in 24 species of young lettuce

Burns, Ian G.; Zhang, Kefeng; Turner, Mary K.; Meacham, Mark C.; Al-Redhiman, Khalid; Lynn, James R.; Broadley, Martin R.; Hand, Paul; Pink, David

doi:10.1002/jsfa.4220

Cited by 49 publications

(45 citation statements)

References 37 publications

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“…2B), since light is one of the main factors influencing nitrate concentration, which increases in the plant tissue under poor light conditions (winter) (Burns et al 2010). The lack of oxygen did not affect the nitrate content in any cycle (Fig.…”

Section: Discussionmentioning

confidence: 87%

Nutrient solution aeration and growing cycles affect quality and yield of fresh-cut baby leaf red lettuce

Conesa

Hernández

Niñirola

et al. 2015

AFSci

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The objective of this research was to study the effects of nutrient solution aeration (no aeration [NA], low aeration [LA] or high aeration [HA]) and growing cycle (autumn, winter and summer) on the yield, quality, and shelf life of red lettuce as a fresh-cut product grown in a floating system. The specific leaf area, yield and root diameter were affected by the growing cycle. The percentage of dry matter and the nitrate content were affected by growing cycle and aeration, total phenolics and mesophilic microorganism by aeration and storage time, hue angle and chromacity by growing cycle and storage time, and antioxidant capacity, vitamin C, lightness and psychrophilic microorganisms were affected by all three factors. NA conditions increased the antioxidant capacity in summer and vitamin C content in winter. The lowest mesophilic and psychrophilic count was observed in autumn. The effect of aeration on most of the quality parameters measured was influenced by the growing cycle.

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Section: Discussionmentioning

confidence: 87%

Nutrient solution aeration and growing cycles affect quality and yield of fresh-cut baby leaf red lettuce

Conesa

Hernández

Niñirola

et al. 2015

AFSci

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“…Previous studies had shown that Saladin and Iceberg differ significantly in the extent to which they accumulate nitrate (Meacham et al 2003;Burns et al 2011b), and that these differences reflect much of the variability in nitrate concentration observed within a diverse population of young lettuce cultivars in previous screening experiments (Burns et al 2011b). As a result, any progeny from crosses of these two cultivars would be expected to exhibit a wide variability in nitrate accumulation.…”

Section: Plant Materialsmentioning

confidence: 90%

“…The position of the first hole in adjacent gullies alternated between 240 and 480 mm from each end, producing a staggered plant arrangement with a diagonal spacing of about 270 mm between successive gullies, and an average density of 14.2 plants m −2 on each bench. A complete nutrient solution containing nitrate (at 8 mol m −3 ) as the sole N source previously used by Burns et al (2011b), with an adequate concentration of all other nutrients (Hewitt 1966) was continuously pumped from linked storage tanks (with a total capacity of 800 L) to the top end of the eight gullies; this then flowed down the gradient and drained back into the original tanks. This solution was used at half-strength during the first 5 days after transplanting, and at full strength thereafter.…”

Section: Hydroponic Culturementioning

confidence: 99%

The influence of genetic variation and nitrogen source on nitrate accumulation and iso-osmotic regulation by lettuce

Burns

Durnford

Lynn³

et al. 2011

Plant Soil

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Background and aims Characterisation of genetic variation in nitrate accumulation by lettuce will inform strategies for selecting low-nitrate varieties more capable of meeting EU legislation on harvested produce. This study uses a population of recombinant inbred lines (RILs) of lettuce to determine how genotypic differences influence N uptake, N assimilation and iso-osmotic regulation, and to identify key related traits prior to future genetic analysis. Methods Measurements were made on plants grown to maturity in soil fertilised with ammonium nitrate, and in a complete nutrient solution containing only nitrate-N. A simple osmotic balance model was developed to estimate variations in shoot osmotic concentration between RILs. Results There were significant genotypic variations in nitrate accumulation when plants were grown either with nitrate alone or in combination with ammonium. Ammonium-N significantly reduced nitrate in the shoot but had no effect on its relative variability, or on the ranking of genotypes. Shoot nitrate-N was correlated positively with total-N and tissue water, and negatively with assimilated-C in both experiments. Corresponding relationships with assimilated-N and shoot weight were weaker. Estimated concentrations of total osmotica in shoot sap were statistically identical in all RILs, despite variations in nitrate concentration across the population. Conclusions Approximately 73% of the genotypic variability in nitrate accumulation within the population of RILs arose from differences in nitrate uptake and only 27% from differences in nitrate assimilated, irrespective of whether or not part of the N was recovered as ammonium, or whether the plants were grown in soil or solution culture. Genotypic variability in nitrate accumulation was associated with changes in concentrations of other endogenous solutes (especially carboxylates and soluble carbohydrates) and of tissue water, which minimised differences in osmotic potential of shoot sap between RILs. This offers the opportunity of using the regulation of these solutes as additional traits to manipulate nitrate accumulation.

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“…Although there is strong evidence for the genotypical effects on Cd or nitrate accumulation in vegetable plants (Arao et al, 2003;Burns et al, 2011a;Sugiyama et al, 2011;Wang X et al, 2015;Kristl et al, 2016), less is known about the higher specificity. The present study indicated that no correlation occurred between plant Cd, nitrate, and biomass, suggesting that yield, Cd and nitrate levels may be independent of each other.…”

Section: Discussionmentioning

confidence: 99%

“…(Huang et al, 2015). Nitrate concentration in high-accumulation genotypes was several times greater than that in low-accumulation genotypes, such as lettuce (Lactuca sativa L.) (Escobar-Gutiérrez et al, 2002;Burns et al, 2011a), leaf mustard (Brassica juncea (L.) Czern.) (Sharma et al, 2010), and taro (Colocasia esculenta (L.) Schott) (Kristl et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Variations in cadmium and nitrate co-accumulation among water spinach genotypes and implications for screening safe genotypes for human consumption

Tang

Luo

et al. 2018

J. Zhejiang Univ. Sci. B

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Abstract:Vegetables are important constituents of the human diet. Heavy metals and nitrate are among the major contaminants of vegetables. Consumption of vegetables and fruits with accumulated heavy metals and nitrate has the potential to damage different body organs leading to unwanted effects. Breeding vegetables with low heavy metal and nitrate contaminants is a cost-effective approach. We investigated 38 water spinach genotypes for low Cd and nitrate co-accumulation. Four genotypes, i.e. JXDY, GZQL, XGDB, and B888, were found to have low co-accumulation of Cd (<0.71 mg/kg dry weight) and nitrate (<3100 mg/kg fresh weight) in the edible parts when grown in soils with moderate contamination of both Cd (1.10 mg/kg) and nitrate (235.2 mg/kg). These genotypes should be appropriate with minimized risk to humans who consume them. The Cd levels in the edible parts of water spinach were positively correlated with the concentration of Pb or Zn, but Cd, Pb, or Zn was negatively correlated with P concentration. These results indicate that these three heavy metals may be absorbed into the plant in similar proportions or in combination, minimizing the influx to aerial parts. Increasing P fertilizer application rates appears to prevent heavy metal and nitrate translocation to shoot tissues and the edible parts of water spinach on co-contaminated soils.

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Screening for genotype and environment effects on nitrate accumulation in 24 species of young lettuce

Cited by 49 publications

References 37 publications

Nutrient solution aeration and growing cycles affect quality and yield of fresh-cut baby leaf red lettuce

Nutrient solution aeration and growing cycles affect quality and yield of fresh-cut baby leaf red lettuce

The influence of genetic variation and nitrogen source on nitrate accumulation and iso-osmotic regulation by lettuce

Variations in cadmium and nitrate co-accumulation among water spinach genotypes and implications for screening safe genotypes for human consumption

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