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1. Variation in recovery of Salmonella strains extracted from leafy greens

Author:
Erickson, Marilyn C.; Liao, Jye-Yin
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2019 v.107 pp. 185-190
ISSN:
0023-6438
Subject:
lettuce,   etc   ; Salmonella; cabbage; enrichment culture; pathogens; spinach;     Show all 6 Subjects
Abstract:
... This study investigated the degree of extraction from leafy green tissue (green leafy lettuce, spinach, red cabbage) artificially inoculated with five individual strains of Salmonella at 3–4 log CFU. Inclusion of salt at levels of 0.50 M–0.75 M in the extraction solution improved recovery of S. Enteritidis Benson (P < 0.05) but salt in the range of 0.09–0.75 M had no effect on S. Enteritidis ME18, ...
DOI:
10.1016/j.lwt.2019.02.078

2. Adaptive two time-scale receding horizon optimal control for greenhouse lettuce cultivation

Author:
Xu, Dan; Du, Shangfeng; van Willigenburg, Gerard
Source:
Computers and electronics in agriculture 2018 v.146 pp. 93-103
ISSN:
0168-1699
Subject:
lettuce,   etc   ; algorithms; greenhouses; models; uncertainty;     Show all 5 Subjects
Abstract:
... A two time-scale, receding horizon, optimal controller for greenhouse lettuce cultivation is extended with on-line parameter estimation to handle ill-known or time-varying parameters of the greenhouse-crop model. By means of simulations, the possible improvement of performance and reduction of constraint violation, introduced by this extension, are investigated. Moreover, uncommon issues in the ad ...
DOI:
10.1016/j.compag.2018.02.001

3. Probing the effects of different lead compounds on the bioavailability of lead to plants

Author:
De Silva, Shamali; Bernett, Chloe; Meaklim, Jean; Abeywardane, Erandika; Reichman, Suzie M.
Source:
Chemosphere 2019 v.230 pp. 24-28
ISSN:
0045-6535
Subject:
lettuce,   etc   ; bioavailability; grasses; lead; pollutants; risk; shoots; soil; solubility; toxicity;     Show all 10 Subjects
Abstract:
... Lead (Pb) is an important pollutant and is released into the environment in many forms. Different lead compounds have a variety of solubilities and so may impact on lead bioavailability and toxicity when added to soil. In this experimental study, we investigated the bioavailability of Pb in soil spiked with 300, 900 and 1500 mg/kg of Pb-acetate, PbCl2 and PbO using lettuce and wallaby grass. The c ...
DOI:
10.1016/j.chemosphere.2019.04.122

4. Rapid attachment of Listeria monocytogenes to hydroponic and soil grown lettuce leaves

Author:
Kyere, Emmanuel O.; Foong, Grace; Palmer, Jon; Wargent, Jason J.; Fletcher, Graham C.; Flint, Steve
Source:
Food control 2019 v.101 pp. 77-80
ISSN:
0956-7135
Subject:
lettuce,   etc   ; Listeria monocytogenes; exposure duration; fresh produce; hydroponics; pathogens; soil;     Show all 7 Subjects
Abstract:
... Listeria monocytogenes has been implicated in many foodborne outbreaks involving fresh produce such as lettuce. In order to contaminate the lettuce, the pathogen must attach to the fresh produce. In this study, the attachment of L. monocytogenes strains O8A06, O8A07 and O8A08 to hydroponically grown lettuce as well as lettuce grown with a soil potting mix was evaluated under different exposure tim ...
DOI:
10.1016/j.foodcont.2019.02.015

5. Erinachromanes A and B and Erinaphenol A from the Culture Broth of Hericium erinaceus

Author:
Wu, Jing; Uchida, Kazuki; Ridwan, Arif Yanuar; Kondo, Mitsuru; Choi, Jae-Hoon; Hirai, Hirofumi; Kawagishi, Hirokazu
Source:
Journal of agricultural and food chemistry 2019 v.67 no.11 pp. 3134-3139
ISSN:
1520-5118
Subject:
lettuce,   etc   ; Hericium; bioassays; culture media; plant growth; spectral analysis;     Show all 6 Subjects
Abstract:
... Three novel compounds, erinachromanes A and B (1, 2) and erinaphenol A (3), along with eight known compounds (4–11), were isolated from the culture broth of Hericium erinaceus. The structures of 1–3 were determined by the interpretation of spectroscopic data. Although compounds 4 and 9 had been synthesized, they were isolated from a natural source for the first time. In the bioassay examining plan ...
DOI:
10.1021/acs.jafc.8b06050

6. Effects of artificial light sources on accumulation of phytochemical contents in hydroponic lettuce

Author:
Ruangrak, Eaknarin; Khummueng, Weeraya
Source:
Journal of horticultural science & biotechnology 2019 v.94 no.3 pp. 378-388
ISSN:
1462-0316
Subject:
lettuce,   etc   ; Lactuca sativa; chemical constituents of plants; crop production; hydroponics;     Show all 5 Subjects
Abstract:
... Lettuce is grown in different parts of the world and it is beneficial for health. Light condition is one of the most important environmental factor in regulating growth, development, and phytochemical accumulation in lettuce, particularly when lettuce is produced in a hydroponic system. Due to advances in technologies, artificial light sources have become increasingly capable of providing appropri ...
DOI:
10.1080/14620316.2018.1504630

7. Suitability of centrifuge water for detecting the presence of Escherichia coli versus finished fresh-cut lettuce testing

Author:
López-Gálvez, Francisco; Gil, Maria Isabel; Andújar, Silvia; Allende, Ana
Source:
Food microbiology 2019 v.84 pp. 103271
ISSN:
0740-0020
Subject:
lettuce,   etc   ; Escherichia coli; fresh market; fresh-cut produce; hygiene; microorganisms; pathogens; Europe; United States;     Show all 9 Subjects
Abstract:
... Fresh produce causes most foodborne outbreaks in the USA, and it is also considered a hazardous food product in other areas of the world such as Europe. The outbreaks attributed to fresh produce increase the focus of producers on hygiene to minimize exposure to food hazards. The fresh produce industry has the urgent need to detect if there are production lots contaminated with pathogenic microorga ...
DOI:
10.1016/j.fm.2019.103271

8. Dynamic modeling of famoxadone and oxathiapiprolin residue on cucumber and Chinese cabbage based on tomato and lettuce archetypes

Author:
Feng, Xiaoxiao; Pan, Lixiang; Xu, Tianheng; Jing, Jing; Zhang, Hongyan
Source:
Journal of hazardous materials 2019 v.375 pp. 70-77
ISSN:
0304-3894
Subject:
lettuce,   etc   ; Chinese cabbage; crops; cucumbers; dynamic models; famoxadone; field experimentation; humans; pesticide residues; tomatoes; viability;     Show all 11 Subjects
Abstract:
... We analyzed the uptake and distribution of two pesticides (famoxadone and oxathiapiprolin) in herbaceous vegetables (cucumber and tomato) and leafy vegetables (Chinese cabbage and lettuce) to test the viability of applying existing archetypes in the dynamic plant uptake model dynamiCROP to modeling pesticide residue in other crops. Using field data and modeling, we showed that tomato was an unsuit ...
DOI:
10.1016/j.jhazmat.2019.04.075

9. Conditions at the time of inoculation influence survival of attenuated Escherichia coli O157:H7 on field-inoculated lettuce

Author:
Moyne, Anne-laure; Blessington, Tyann; Williams, Thomas R.; Koike, Steven T.; Cahn, Michael D.; Marco, Maria L.; Harris, Linda J.
Source:
Food microbiology 2019 pp. 103274
ISSN:
0740-0020
Subject:
romaine lettuce,   etc   ; Escherichia coli O157; environmental factors; humidity; inoculum; leaf wetness; plant development;     Show all 7 Subjects
Abstract:
... The impact of plant development, environmental conditions at the time of inoculation, and inoculum concentration on survival of attenuated BSL1 Escherichia coli O157:H7 strain ATCC 700728 on field-grown romaine lettuce was evaluated over 3 years. E. coli 700728 was inoculated onto 4- and 6-week-old romaine lettuce plants in the Salinas Valley, CA, at night or the next morning with either low (5 lo ...
DOI:
10.1016/j.fm.2019.103274

10. Development of a coupled model of quantitative ion character-activity relationships-biotic ligand model (QICARs-BLM) for predicting toxicity for data poor metals

Author:
Meng, Xiaoqi; Wang, Xuedong; Ma, Yibing; Wang, Ying
Source:
Journal of hazardous materials 2019 v.373 pp. 620-629
ISSN:
0304-3894
Subject:
lettuce,   etc   ; barley; earthworms; environmental factors; ionization; ligands; median effective concentration; metals; models; prediction; soil; toxicity;     Show all 12 Subjects
Abstract:
... The biotic ligand model (BLM) is proposed as a tool to quantitatively evaluate biological toxicity of metals considering both metal speciation and the influence of environmental conditions. The model assumes that biological sites bind to metals as biotic ligands (BLs) and obtains a series of BLM parameters including conditional binding constants (K). However, developing a BLM for each metal and bi ...
DOI:
10.1016/j.jhazmat.2019.03.094

11. Application of alternating current electro-degradation improves retarded growth and quality in lettuce under autotoxicity in successive cultivation

Author:
Talukder, Md. Raihan; Asaduzzaman, Md.; Tanaka, Hideyuki; Asao, Toshiki
Source:
Scientia horticulturae 2019 v.252 pp. 324-331
ISSN:
0304-4238
Subject:
lettuce,   etc   ; allelochemicals; calcium; growth retardation; iron; mineral content; nutrient solutions; plant micronutrients;     Show all 8 Subjects
Abstract:
... In this study we investigated autotoxicity in lettuce under successive cultivation and applied alternating current electro-degradation (ED) to non-renewed nutrient solution to degrade the accumulated allelochemicals and consequently to improve the retarded yield and quality of lettuce. In our first experiment, lettuce was grown in renewed, non-renewed and non-renewed + ED solution. Every two weeks ...
DOI:
10.1016/j.scienta.2019.04.001

12. Prediction of prospective leaf morphology in lettuce based on intracellular chloroplast position

Author:
Hikawa, Mio; Nishizawa, Kazuyo; Kodama, Yutaka
Source:
Scientia horticulturae 2019 v.251 pp. 20-24
ISSN:
0304-4238
Subject:
lettuce,   etc   ; Lactuca sativa; blue light; cell walls; chloroplasts; leaf area; leaf morphology; leaves; photosynthesis; prediction;     Show all 10 Subjects
Abstract:
... In the accumulation response, chloroplasts move toward weak blue light, staying at positions along the periclinal cell wall. By contrast, in the avoidance response, chloroplasts move away from strong blue light, escaping to positions along the anticlinal cell wall. The accumulation response maximizes light capture and the avoidance response reduces photodamage. The intracellular positioning of chl ...
DOI:
10.1016/j.scienta.2019.02.080

13. Prevalence of Norovirus in produce sold at retail in the United Kingdom

Author:
Cook, Nigel; Williams, Luminita; D'Agostino, Martin
Source:
Food microbiology 2019 v.79 pp. 85-89
ISSN:
0740-0020
Subject:
lettuce,   etc   ; Norovirus; food safety; fresh produce; raspberries; salads; viruses; United Kingdom;     Show all 8 Subjects
Abstract:
... To acquire data on contamination with Norovirus in berry fruit and salad vegetables in the United Kingdom, one thousand one hundred and fifty two samples of fresh produce sold at retail in the UK were analysed for Norovirus. Of 568 samples of lettuce, 30 (5.3%) were Norovirus-positive. Most (24/30) lettuce samples which tested positive for Norovirus were grown in the UK and 19 of those 24 samples ...
DOI:
10.1016/j.fm.2018.12.003

14. Application of deep brief network in transmission spectroscopy detection of pesticide residues in lettuce leaves

Author:
Wu, Minmin; Sun, Jun; Lu, Bing; Ge, Xiao; Zhou, Xin; Zou, Mengli
Source:
Journal of food process engineering 2019 v.42 no.3 pp. e13005
ISSN:
0145-8876
Subject:
lettuce,   etc   ; fenvalerate; models; near-infrared spectroscopy; pesticide residues; qualitative analysis; spectral analysis; support vector machines; wavelengths;     Show all 9 Subjects
Abstract:
... To realize the quick, nondestructive detection of pesticide residues in lettuce leaves, a new method based on deep brief network (DBN) combined with near‐infrared transmission spectroscopy, was studied in this article. Two kinds of pesticide residues (fenvalerate and triazoline) and distilled water were sprayed on the surface of lettuce leaves, respectively. In addition, near infrared transmission ...
DOI:
10.1111/jfpe.13005

15. Genome Sequence and Antifungal Activity of Two Niche-Sharing Pseudomonas protegens Related Strains Isolated from Hydroponics

Author:
Polano, Cesare; Martini, Marta; Savian, Francesco; Moruzzi, Serena; Ermacora, Paolo; Firrao, Giuseppe
Source:
Microbial ecology 2019 v.77 no.4 pp. 1025-1035
ISSN:
0095-3628
Subject:
lettuce,   etc   ; Pseudomonas protegens; antifungal properties; fungal growth; fungi; hydroponics; multigene family; secondary metabolites; transposons;     Show all 9 Subjects
Abstract:
... This work reports the comparison of the genome sequence and the ability to inhibit fungal growth of two Pseudomonas protegens related strains that were isolated from the same hydroponic culture of lamb’s lettuce. The two strains were very similar in their core genome but one strain, Pf4, contained three gene clusters for the production of secondary metabolites, i.e., pyoluteorin (plt), pyrrolnitri ...
DOI:
10.1007/s00248-018-1238-5

16. Shade cloths and polyethylene covers have opposite effects on tipburn development in greenhouse grown lettuce

Author:
Bárcena, Alejandra; Graciano, Corina; Luca, Tomás; Guiamet, Juan J.; Costa, Lorenza
Source:
Scientia horticulturae 2019 v.249 pp. 93-99
ISSN:
0304-4238
Subject:
lettuce,   etc   ; calcium; calcium fertilizers; fertilizer application; greenhouses; leaves; plant tissues; polyethylene; soil;     Show all 9 Subjects
Abstract:
... Spring-summer production of lettuce under greenhouses is highly affected by Tipburn development, a physiological disorder attributed to localized calcium (Ca) deficiency. As Ca is distributed along the plant tissues together with the water flux, Tipburn development is related to environmental conditions. Until now, no growing condition that avoids this disorder, without an associated yield penalty ...
DOI:
10.1016/j.scienta.2019.01.023

17. Optimization of temperature and light, and cultivar selection for the production of high-quality head lettuce in a closed-type plant factory

Author:
Lee, Ru Ji; Bhandari, Shiva Ram; Lee, Gongin; Lee, Jun Gu
Source:
Horticulture, environment and biotechnology 2019 v.60 no.2 pp. 207-216
ISSN:
2211-3452
Subject:
head lettuce,   etc   ; Lactuca sativa; cultivars; fluorescent lighting; light intensity; photons; photoperiod; photosynthesis; relative humidity; temperature;     Show all 10 Subjects
Abstract:
... Two separate experiments were conducted to identify suitable cultivars, to optimize light and temperature, and to understand the heading process in order to produce high-quality crisphead lettuce (Lactuca sativa L.) in a closed production environment. Three commercial crisphead lettuce cultivars (‘Adam’, ‘Manchu’, and ‘Sensation’) were grown on deep flow technique beds in a closed-type plant facto ...
DOI:
10.1007/s13580-018-0118-8

18. Variability of chromium bioaccessibility and speciation in vegetables: The influence of in vitro methods, gut microbiota and vegetable species

Author:
Wang, Pengfei; Yin, Naiyi; Cai, Xiaolin; Du, Huili; Li, Zejiao; Sun, Guoxin; Cui, Yanshan
Source:
Food chemistry 2019 v.277 pp. 347-352
ISSN:
0308-8146
Subject:
leaf lettuce,   etc   ; Ipomoea aquatica; bioavailability; celery; chemical speciation; chromium; humans; intestinal microorganisms; risk; toxicity;     Show all 10 Subjects
Abstract:
... There is limited research concentrating on the effects of gut microbiota on the bioaccessibility and speciation of chromium (Cr) in vegetables. In this study, the physiologically based extraction test (PBET) and the unified BARGE method (UBM), were combined with the simulator of human intestinal microbial ecosystems (SHIME) to determine the bioaccessibility and speciation of Cr from vegetables. Th ...
DOI:
10.1016/j.foodchem.2018.10.120

19. Crop-dependent changes in water absorption of expanded polystyrene in soil environments

Author:
Kim, Shin Woong; Kim, Dokyung; Chae, Yooeun; Kim, Dasom; An, Youn-Joo
Source:
Chemosphere 2019 v.219 pp. 345-350
ISSN:
0045-6535
Subject:
lettuce,   etc   ; adsorption; bioassays; cadmium; crops; desorption; mung beans; plastics; polystyrenes; rice; soil; water uptake;     Show all 12 Subjects
Abstract:
... As expanded polystyrene (EPS) has been utilized in soil environments, there is a need to understand interactions between chemical adsorption and the soil system. We conducted a plant bioassay using agricultural crops in a soil system containing a macro-sized EPS (8.3 ± 0.5 mm). When the EPS was collected after cultivation of no crop (control), mung bean, lettuce, and rice, we found that its water ...
DOI:
10.1016/j.chemosphere.2018.12.057

20. Genetic analysis of cadmium accumulation in lettuce (Lactuca sativa)

Author:
Zorrig, Walid; Cornu, Jean-Yves; Maisonneuve, Brigitte; Rouached, Aïda; Sarrobert, Catherine; Shahzad, Zaigham; Abdelly, Chedly; Davidian, Jean-Claude; Berthomieu, Pierre
Source:
Plant physiology and biochemistry 2019 v.136 pp. 67-75
ISSN:
0981-9428
Subject:
lettuce,   etc   ; Lactuca sativa; cadmium; crossing; cultivars; genetic analysis; genetic variation; loci; phenotype; roots; shoots;     Show all 11 Subjects
Abstract:
... This work characterized mechanisms controlling cadmium (Cd) tolerance and accumulation in lettuce at both the physiological and genetic levels. These traits were evaluated in 18 Lactuca accessions representing a large genetic diversity. Cd tolerance and accumulation in roots and shoots as well as Cd translocation from roots to the shoot varied independently, and with a significant range of variati ...
DOI:
10.1016/j.plaphy.2019.01.011