Effect of Seaweed Extracts-Based Leaf Sprays on the Mineral Status, Yield and Fruit Quality of Apple

Malaguti, Donatella; Rombolà, Adamo Domenico; Gerin, Marcelo Aparecido Nunes; Simoni, G.; Tagliavini, Massimo; Marangoni, Bruno

doi:10.17660/actahortic.2002.594.44

Cited by 18 publications

(13 citation statements)

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“…Few studies have shown that the exogenous application of biostimulants increased endogenous antioxidant capacity in apples, such as increased amounts of phenolics and anthocyanin content in apples that were treated with biostimulants. Our results were in accordance with the data illustrated by Soppelsa et al 2018 [ 24 ] and Malaguti et al 2002 [ 41 ], who reported, in organic apple of the cultivar Jonathan and Mondial Gala, similar health promoting responses regarding the significant improvement of antioxidant capacity following the use of macro and micro seaweed extracts both in the peel and in the pulp and the considerable increase of pulp antioxidant potential as a result of amino acids applications. High antioxidant activities that are related to the biostimulants treatment are fundamental for improving the nutritional value of fruit as well as extending their shelf life, thus increasing the overall quality and marketable value of fresh products [ 35 ].…”

Section: Discussionsupporting

confidence: 93%

Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

Graziani

Ritieni

Cirillo

et al. 2020

Plants

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The cultivar Annurca is an apple that is cultivated in southern Italy that undergoes a typical redding treatment and it is appreciated for organoleptic characteristics, high pulp firmness, and nutritional profile. In this study, the effects of three different biostimulants (Micro-algae (MA), Protein hydrolysate (PEP), and Macro-algae mixed with zinc and potassium (LG)), with foliar application, on the quality parameters of Annurca apple fruits at the harvest, after redding, and at +60 and +120 days of cold storage were analyzed: total soluble solids (TSS) content, total acidity (TA), pH, firmness flesh, and red coloration of epicarp. Additionally, the polyphenolic quali-quantitative profile of pulp and peel was analyzed by UHPLC-Q-Orbitrap HRMS and Folin-Ciocalteu and the antioxidant capacity with the methods 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric-reducing antioxidant capacity (FRAP). The results obtained suggest that biostimulants are involved in the regulation of the secondary metabolism of the treated plants, acting positively on the quality of the Annurca fruits and their nutritional value. Fruits treated with PEP have shown, during cold storage, a significantly higher content of total polyphenols in flesh and a higher concentration of phloretin xylo-glucoside and phloridzin (350.53 and 43.58 mg/kg dw respectively). MA treatment caused, at the same time, an enhancement of flavonols between 0.6–28% and showed the highest total polyphenol content in the peel after 60 and 120 days of cold storage, with 2696.048 and 2570.457 mg/kg dw, respectively. The long-term cold storage (120 days) satisfactorily maintained phenolic content of fruits deriving from MA and PEP application, in accordance with data that were obtained for peel, showed an increase of 7.8 and 5.8%, respectively, when compared to the fruits cold stored for 60 days. This study represents the first detailed research on the use of different types of biostimulants on the quality of the Annurca apple from harvest to storage.

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Section: Discussionsupporting

confidence: 93%

Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

Graziani

Ritieni

Cirillo

et al. 2020

Plants

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“…This outcome was confirmed by the colorimetric coordinates (color index), by the total anthocyanin concentration measured on fruit samples taken from different replications and by the evaluation of the red overcolor extension performed on all fruits harvested from all the considered trees under evaluation ( Table 3 and Figures 7 , 8 ). These results confirm those described by Malaguti et al (2002) on apple “Gala” and those by Frioni et al (2018) on red grapevine cultivars evaluated in different cultivation areas. The boosted final red over color of apples might be ascribed to a modulation of the metabolism of plant endogenous growth regulators (mainly cytochins and abscisic acid) obtained with the application of the biostimulant substances (i.e., A. nodosum ; Wally et al, 2013 ), leading to an induction of anthocyanin biosynthesis and accumulation in fruit skin prior to harvest ( Table 3 ).…”

Section: Discussionsupporting

confidence: 91%

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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“…Application of seaweed extract have been known for many years as soil fertilizers and plant growth supplements in agriculture giving beneficial effects including, increase in crop yield, fruit fresh weight, improved fruit yield, high chlorophyll levels in the plant leaves, improved nutrient uptake by the crops, enhancement of seed germination, plant resistance against stress conditions, reduced incidence of fungal disease and insect attack, and the reduction of the effect of water and salinity stress on plant (Zodape, 2001;Malaguti et al, 2002;Hu et al, 2004;Wang et al, 2005;El-Bakry et al, 2006 andSalah El Din et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of Seaweed Extracts as Foliar Spray on Sunflower Yield and Oil Content

Osman

Salem

2011

Egyptian Journal of Phycology

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A field experiment was conducted, June 2009 to study the effects of foliar applications of different concentrations of seaweed extract of Ulva lactuca (Ulvaceae) and Gracilaria dendroides (Gracilariaceae) on nutrient uptake, growth and yield of sunflower plant. There were five treatment control and two concentration 0.4 and 0.6 % w/v from each algal extract, this treatment applied at 3 times; first one at the seedling stage (20 days after sowing), the second at the flowering stage (40 days after sowing), while the third one before yield stage (70 days after sowing). Application of algal extract significantly increase fresh and dry weight of root and shoot, chlorophyll a, chlorophyll b and carotenoids rather than the control, especially with 0.6% extract of G. dendroides. At harvest stage, application of seaweed significantly increase both root and shoot fresh and dry weight, plant height, head diameter, seed index (weight of 1000 seed), seed yield as compared to control. Also, the highest growth parameters were observed in plant treated by 0.6% extract of G. dendroides, except plant height. Highest oil content was observed at 0.6 % G. dendroides extract, followed with 0.6% U. lactuca extract application (34.05 and 30.55%, respectively). The application of extract of 0.4 % and 0.6 % for both studied algae significantly increased seed yield of sunflower by 20.94, 40.31, 30.29 and 28.73%, respectively, compared to control. Improved nutrient uptake (Na and K) was also observed with seaweed extract applications. Thus, foliar applications of seaweed extracts could be a promising option for yield enhancement and high oil yield production of sunflower plant.

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Effect of Seaweed Extracts-Based Leaf Sprays on the Mineral Status, Yield and Fruit Quality of Apple

Cited by 18 publications

References 0 publications

Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

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

Effect of Seaweed Extracts as Foliar Spray on Sunflower Yield and Oil Content

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