Role of sucrose in modulating the low‐nitrogen‐induced accumulation of phenolic compounds in lettuce ( Lactuca sativa L.)

2020 ◽  
Vol 100 (15) ◽  
pp. 5412-5421
Author(s):  
Weiwei Zhou ◽  
Xin Liang ◽  
Yuxue Zhang ◽  
Peibin Dai ◽  
Bin Liang ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Lactuca Sativa ◽  
Lactuca Sativa L ◽  
Low Nitrogen

Effect of Methyl Jasmonate on Phenolic Compounds and Carotenoids of Romaine Lettuce (Lactuca sativa L.)

2007 ◽  
Vol 55 (25) ◽  
pp. 10366-10372 ◽  
Author(s):  
Hyun-Jin Kim ◽  
Jorge M. Fonseca ◽  
Ju-Hee Choi ◽  
Chieri Kubota
Keyword(s):  
Phenolic Compounds ◽  
Methyl Jasmonate ◽  
Lactuca Sativa ◽  
Romaine Lettuce ◽  
Lactuca Sativa L

Effects of nutrient deficiency and abiotic environmental stresses on yield, phenolic compounds and antiradical activity in lettuce (Lactuca sativa L.)

2015 ◽  
Vol 187 ◽  
pp. 93-101 ◽  
Author(s):  
Angelica Galieni ◽  
Carla Di Mattia ◽  
Miriam De Gregorio ◽  
Stefano Speca ◽  
Dino Mastrocola ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Lactuca Sativa ◽  
Antiradical Activity ◽  
Nutrient Deficiency ◽  
Environmental Stresses ◽  
Lactuca Sativa L

scholarly journals Effect of Harpin protein as an elicitor on the content of phenolic compounds and antioxidant capacity in two hydroponically grown lettuce (Lactuca sativa L.) varieties.

2019 ◽  
Vol 39 (1) ◽  
pp. 72-77 ◽  
Author(s):  
Joaquín RODRIGO-GARCÍA ◽  
Benjamín Alejandro NAVARRETE-LABORDE ◽  
Laura Alejandra de la ROSA ◽  
Emilio ALVAREZ-PARRILLA ◽  
José Alberto NÚÑEZ-GASTÉLUM
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Lactuca Sativa ◽  
Lactuca Sativa L ◽  
Harpin Protein ◽  
Hydroponically Grown

Phytotoxic and Enzymatic Study of Philodendron meridionale on seeds of Lactuca sativa L.

2021 ◽  
Vol 10 (1) ◽  
pp. e5610111336
Author(s):  
Juliane Nadal Dias Swiech ◽  
Daniela Gaspardo Folquitto ◽  
Vanessa Barbosa Bobek ◽  
Amanda Migliorini Urban ◽  
Fernando Cesar Martins Betim ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Lactuca Sativa ◽  
Dry Mass ◽  
Cellular Respiration ◽  
Negative Effects ◽  
Methanolic Extracts ◽  
Lactuca Sativa L ◽  
Soxhlet Apparatus ◽  
Enzymatic Study ◽  
And Oxidative Stress

In an effort to identify novel biopesticides, the present study aimed to assess the effects of Philodendron meridionale (Buturi & Sakur) stem and leaf ketonic and ethanolic extracts (SKE, SEE, LKE, and LEE, respectively) on the germination, growth, root respiration, and enzymatic activities of Lactuca sativa L. seeds, and to measure the associated saponins, phenolics, and flavonoids that may possess herbicidal, pharmaceutical, or pesticidal activities. The extracts were obtained using a modified Soxhlet apparatus and methanolic extracts of 0.1, 0.25, 0.5, 0.75 and 1.0 mg.mL-1 were tested, with water and methanol as a control. The presence of saponins and the concentration of phenolic compounds were determined. Allelopathic activity was evaluated in tests of germination, growth, cellular respiration and enzymatic activity. The presence of saponins and the concentration of phenolic compounds equivalent to 225.12 for LKE, 240.45 for LEE, 193.28 for SKE, and 265.14 for SEE (mg·g-1.gallic acid), and flavonoids 52.74 for LKE, 54.31 for LEE, 72.74 for SKE, and 67.21 for SEE (mg.g-1.quercetin) were determined. The allelopathy of the P. meridionale extracts against L. sativa was confirmed through negative effects on L. sativa seed germination, radical growth and morphology, dry mass, and the concentrations of α-amylase (EC 3.2.1.1), ascorbate peroxidase (EC 1.11.1.11), catalase (EC 1.11.1.6), and polyphenol oxidase (EC 1.10.3.1). It was likely that the allelopathic action of the P. meridionale extracts was related to its effects on the membrane permeability and oxidative stress of the treated L. sativa seeds. The P. meridionale extracts contained saponins, calcium oxalate crystals, and flavonoids, including phenolic compounds, which are known allelochemicals with herbicidal activities.

The high reducing sugar content during germination contributes to desiccation damage in lettuce (Lactuca sativa L.) radicles

1995 ◽  
Vol 5 (3) ◽  
pp. 145-149 ◽  
Author(s):  
P. van der Toorn ◽  
B. D. McKersie
Keyword(s):  
Hydroxyl Radicals ◽  
Lactuca Sativa ◽  
Sugar Content ◽  
Primary Source ◽  
Reducing Sugar ◽  
Amino Groups ◽  
Lettuce Seeds ◽  
Lactuca Sativa L ◽  
Lipid Aldehydes

AbstractAt the time of protrusion, radicles of lettuce seeds became susceptible to desiccation damage. Concomitant with radicle elongation, both the reducing sugar content and the amount of lipid-aldehydes increased. The role of the hydroxy- and lipid-aldehydes in browning reactions that occurred during desiccation and re-imbibition was analysed. It was concluded that both types of aldehydes reacted with amino-groups during desiccation and that the increase in lipid-aldehydes during germination could be due to the augmented reducing sugar content. Therefore, the high reducing sugar content in radicles of germinated lettuce seeds may be the primary source of hydroxyl radicals, and thereby, a principal cause of desiccation damage.

scholarly journals Phytochemical Responses to Salt Stress in Red and Green Baby Leaf Lettuce (Lactuca sativa L.) Varieties Grown in a Floating Hydroponic Module

Separations ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 175
Author(s):  
Giandomenico Corrado ◽  
Paola Vitaglione ◽  
Maria Giordano ◽  
Giampaolo Raimondi ◽  
Francesco Napolitano ◽  
...  
Keyword(s):  
Salt Stress ◽  
Lactuca Sativa ◽  
Leaf Traits ◽  
Leafy Vegetables ◽  
Response Models ◽  
Lactuca Sativa L ◽  
Harvest Strategy ◽  
Leaf Lettuce ◽  
Full Factorial

Lettuce (Lactuca sativa L.) is one of the most popular leafy vegetables, appreciated globally as a low-calorie food with bioactive compounds. The application of a low dose of abiotic stress is considered a sustainable pre-harvest strategy to modify the nutraceutical value of horticultural products. In this work, we explored the response of two differently colored (red or green) baby leaf lettuce varieties to four NaCl concentrations in the nutrient solution (from 1 to 30 mM), using a full factorial design. We focused on leaf morphological parameters and possible phytochemical enhancement of the main polyphenols and anthocyanins, analyzed by LC-MS. The response to low-to-moderate salt stress exposure was affected mainly by salt concentration for leaf traits or by the cultivar for leaf color, with very limited factors’ interactions. Multivariate analysis indicated a predominant role of the genotypic factor in shaping differences in the two weeks growing cycle for baby leaf lettuce. Phytochemically, different dose–response models to sub-optimal saline conditions may be applied to the various compounds. A significant hormetic stimulation was present only for cyanidin-malonyl glucoside, the main anthocyanin present in the red cultivar.

scholarly journals Inflorescence Development and the Role of LsFT in Regulating Bolting in Lettuce (Lactuca sativa L.)

2018 ◽  
Vol 8 ◽  
Author(s):  
Zijing Chen ◽  
Yingyan Han ◽  
Kang Ning ◽  
Yunyu Ding ◽  
Wensheng Zhao ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Inflorescence Development ◽  
Lactuca Sativa L

Effect of proline on biochemical and molecular mechanisms in lettuce (Lactuca sativa L.) exposed to UV-B radiation

2017 ◽  
Vol 16 (2) ◽  
pp. 246-254 ◽  
Author(s):  
Ozkan Aksakal ◽  
Dilruba Tabay ◽  
Aslıhan Esringu ◽  
Feyza Icoglu Aksakal ◽  
Nevzat Esim
Keyword(s):  
Oxidative Stress ◽  
Lactuca Sativa ◽  
Molecular Mechanisms ◽  
Lactuca Sativa L ◽  
Radiation Induced

The purpose of the present study was to evaluate the role of proline (Pro) in relieving UV-B radiation-induced oxidative stress in lettuce.

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