Effect on health promoting phytochemicals following seaweed application, in potato and onion crops grown under a low input agricultural system

Lola-Luz, Theodora; Hennequart, Franck; Gaffney, Michael

doi:10.1016/j.scienta.2014.03.022

Cited by 32 publications

(22 citation statements)

References 15 publications

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“…Foliar sprays at the mid‐ripening stage (MR stage) could modulate biosynthesis of anthocyanins and phenolics, and increase their concentration until harvest, anticipating the achievement of the final concentration of different metabolites. This confirms and explains previous findings of various authors who increased anthocyanins, flavonoids and phenolic compounds in tissues of different plants subjected to applications of A. nodosum extract …”

Section: Discussionsupporting

confidence: 93%

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

et al. 2019

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BACKGROUND Recent studies report that Ascophyllum nodosum extracts, once applied on the canopy of different crops, deliver positive effects, increasing yield, inducing tolerance to biotic stress, and improving the quality of products. However, the mechanisms of action are still unclear. In this research, vines subjected to multiple foliar applications of an A. nodosum extract (ANE) at label doses were compared with untreated vines (NTV) in accordance with a comparative approach. The investigation coupled a field experiment with a second trial conducted under semi‐controlled conditions, to clarify the mechanisms of action involved. RESULTS The biostimulant did not affect soluble solids or the acidity of grapes; instead, it improved their anthocyanin and phenolic concentrations and the respective profiles. At the time of harvest, anthocyanin, and phenolic concentration were increased by 10.4% and 14.5%, respectively, when compared to the NTV. These effects correlated with a specific modulation of genes involved in the flavonoid metabolic pathways. Moreover, grapes from ANE vines witnessed a significant reduction in the spreading of gray mold when they were either assessed in field conditions or in vitro, compared to the grapes of NTV vines. This was related to a significant upregulation of the defense‐related genes of the plant. CONCLUSIONS Overall, the results showed that A. nodosum extracts can be valuable tools in viticulture considering the emergence of challenging environmental conditions; hence, the regulation of specific metabolic pathways is the mechanism of action that leads to an increased tolerance of biotic stress and of changes in the content of grape metabolites. © 2019 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 93%

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

et al. 2019

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“…Phenolic compounds are biologically active metabolites showing antioxidant potential ( Rice-Evans et al, 1997 ) and therefore highly considered as health-promoting substances in fruits ( Slavin and Lloyd, 2012 ). Similar health-promoting responses were found in onion and potato after the application of A. nodosum ( Lola-Luz et al, 2014 ). Protein hydrolysates of different origin (legume and alfalfa) promoted the antioxidant capacity of tomato ( Rouphael et al, 2017 ) and green or red pepper ( Ertani et al, 2015 ) similarly to what was detected for the apple pulp in our study ( Figure 10B ).…”

Section: Discussionsupporting

confidence: 66%

“…Biostimulants have been found active in promoting final crop quality and, more in detail, researches had highlighted the relevance of biostimulant applications for selected functional quality traits. The concentration of secondary metabolites such as phenols, flavonoids, and ascorbic acid were enhanced after the application of protein hydrolysates or seaweed extract in tomato ( Rouphael et al, 2017 ), pepper ( Ertani et al, 2015 ), onion, and potato ( Lola-Luz et al, 2014 ). Giving the high antioxidant activity of phenolic compounds, the nutraceutical value of those vegetables was also improved.…”

Section: Introductionmentioning

confidence: 99%

Use of Biostimulants for Organic Apple Production: Effects on Tree Growth, Yield, and Fruit Quality at Harvest and During Storage

et al. 2018

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The experiment was conducted during two consecutive seasons (years 2016 and 2017) in an organic apple orchard of the cultivar Jonathan. Several biostimulants were tested (10 in total), including humic acids, macro and micro seaweed extracts, alfalfa protein hydrolysate, amino acids alone or in combination with zinc, B-group vitamins, chitosan and a commercial product containing silicon. Treatments were performed at weekly intervals, starting from the end of May until mid-August. The macroseaweed extract was effective in stimulate tree growth potential in both years, as shown by a significantly larger leaf area (+20% as compared to control) and by an higher chlorophyll content and leaf photosynthetic rate in year 2016. As for the yield performances and apples quality traits at harvest (average fruit weight, soluble solids content, titratable acidity, and flesh firmness), they were generally affected by the different climatic conditions that characterized the two growing seasons (year 2017 being characterized by higher maximal and average temperatures and by limited rainfalls at the beginning of the season). Treatments with macroseaweed extract, B-group vitamins and alfalfa protein hydrolysate were able to significantly improve the intensity and extension of the red coloration of apples at harvest. Correspondingly, the anthocyanin content in the skin of apples treated with the same biostimulants resulted significantly higher than control, highlighting the potential influence of these substances on the synthesis of secondary metabolites in apple. The incidence of physiological disorders was also monitored during apple storage period. Amino acids plus zinc application was effective in reducing (more than 50%) the incidence of the “Jonathan spot,” the main post-harvest disorder for this cultivar.

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“…Drift seaweed washed up on shore has been used as an organic agricultural fertiliser in coastal regions of the world for centuries. The application of seaweed as a fertiliser improves soil structure, provides trace elements and growth activators [ 4 ] as well as resulting in earlier seed germination, the enhancement of crop performance and yield and a better resistance to both biotic and abiotic stresses [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Looking Beyond the Terrestrial: The Potential of Seaweed Derived Bioactives to Treat Non-Communicable Diseases

et al. 2016

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Seaweeds are a large and diverse group of marine organisms that are commonly found in the maritime regions of the world. They are an excellent source of biologically active secondary metabolites and have been shown to exhibit a wide range of therapeutic properties, including anti-cancer, anti-oxidant, anti-inflammatory and anti-diabetic activities. Several Asian cultures have a strong tradition of using different varieties of seaweed extensively in cooking as well as in herbal medicines preparations. As such, seaweeds have been used to treat a wide variety of health conditions such as cancer, digestive problems, and renal disorders. Today, increasing numbers of people are adopting a “westernised lifestyle” characterised by low levels of physical exercise and excessive calorific and saturated fat intake. This has led to an increase in numbers of chronic Non-communicable diseases (NCDs) such as cancer, cardiovascular disease, and diabetes mellitus, being reported. Recently, NCDs have replaced communicable infectious diseases as the number one cause of human mortality. Current medical treatments for NCDs rely mainly on drugs that have been obtained from the terrestrial regions of the world, with the oceans and seas remaining largely an untapped reservoir for exploration. This review focuses on the potential of using seaweed derived bioactives including polysaccharides, antioxidants and fatty acids, amongst others, to treat chronic NCDs such as cancer, cardiovascular disease and diabetes mellitus.

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Effect on health promoting phytochemicals following seaweed application, in potato and onion crops grown under a low input agricultural system

Cited by 32 publications

References 15 publications

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

Use of Biostimulants for Organic Apple Production: Effects on Tree Growth, Yield, and Fruit Quality at Harvest and During Storage

Looking Beyond the Terrestrial: The Potential of Seaweed Derived Bioactives to Treat Non-Communicable Diseases

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