What we talk about when we talk about protein hydrolyzate-based biostimulants

Cavani, Luciano; Margon, Alja; Sciubba, Luigi; Ciavatta, Claudio; Marzadori, Claudio

doi:10.3934/agrfood.2017.3.221

Cited by 10 publications

(8 citation statements)

References 9 publications

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“…The better response of P-PH may be attribute to the fact that PH TAYSON®comprises tryptophan, a precursor of indole-3-acetic acid which is responsible for the expansion of shoots and roots. Conversely, since A-PH are produced through a chemical hydrolysis, that occurs at temperatures above 121 • C, thermolabile amino acids, such as tryptophan, are degraded [34]. Our outcomes on plant N concentration are in accord with those reported by Amr and Hadidi [35], who found that the application of PHs on leafy green vegetables decreases nitrates accumulation.…”

Section: Discussionsupporting

confidence: 90%

“…Thus, we could speculate that the higher total phenolic level is due to a distress triggered by a non-optimal condition caused by the A-PH treatment. Indeed, A-PHs, produced via a chemical hydrolysis, have a higher salinity compared with the P-PHs produced though enzymatic hydrolysis, due to the alkali content, such as sodium, potassium or calcium hydroxide, and acids like hydrochloric or sulfuric acid [34]. Our outcomes on color traits revealed that PH treatments (plant or animal-derived), enhanced the greenish of stalks and leaves.…”

Section: Discussionmentioning

confidence: 80%

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Celery (Apium graveolens L.) Performances as Subjected to Different Sources of Protein Hydrolysates

Consentino

Virga

Placa

et al. 2020

Plants

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The vegetable production sector is currently fronting several issues mainly connected to the increasing demand of high quality food produced in accordance with sustainable horticultural technologies. The application of biostimulants, particularly protein hydrolysates (PHs), might be favorable to optimize water and mineral uptake and plant utilization and to increase both production performance and quality feature of vegetable crops. The present study was carried out on celery plants grown in a tunnel to appraise the influence of two PHs, a plant-derived PH (P-PH), obtained from soy extract and an animal PH (A-PH), derived from hydrolyzed animal epithelium (waste from bovine tanneries) on yield, yield components (head height, root collar diameter, and number of stalks), mineral composition, nutritional and functional features, as well as the economic profitability of PHs applications. Fresh weight in A-PH and P-PH treated plants was 8.3% and 38.2% higher, respectively than in untreated control plants. However, no significant difference was found between A-PH treated plants and control plants in terms of fresh weight. Head height significantly increased by 5.5% and 16.3% in A-PH and P-PH treated plants, respectively compared with untreated control (p ≤ 0.05). N content was inferior in PHs treated plants than in untreated control. Conversely, K and Mg content was higher in A-PH and P-PH treated plants as compared to the untreated ones. Furthermore, A-PH and P-PH improved ascorbic acid content by 8.2% and 8.7%, respectively compared with the non-treated control (p ≤ 0.001). Our results confirmed, also, that PHs application is an eco-friendly technique to improve total phenolic content in celery plants. In support of this, our findings revealed that animal or plants PH applications increased total phenolics by 36.9% and 20.8%, respectively compared with untreated plants (p ≤ 0.001).

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 80%

Celery (Apium graveolens L.) Performances as Subjected to Different Sources of Protein Hydrolysates

Consentino

Virga

Placa

et al. 2020

Plants

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“…Enzymatic hydrolysis on Bio-A proceeded with a hydrolysis degree (HD) of 9.2%, in accordance to similar hydrolytic processes reported in literature [25]. HD indicates the intensity of the hydrolysis process and it’s calculated as the ratio between number of cleaved peptide bonds and the total number of peptide bonds.…”

Section: Resultssupporting

confidence: 80%

Efficient Chemo-Enzymatic Transformation of Animal Biomass Waste for Eco-Friendly Leather Production

Sole

Taddei²,

Franceschi³

et al. 2019

Molecules

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Enzymatically processed animal biomass derived from treated bovine hides (wet blue scraps) is herein used as building block for the synthesis of a novel biopolymer. An enzymatic hydrolysis process allows to produce water-soluble lower molecular weight proteins (Bio-A), which are then reacted with glycerol and maleic anhydride (MA) in order to obtain a new intermediate (Bio-IA). With Bio-IA in hand, co-polymerization in the presence of acrylic acid is then carried out. Hydrolysed biomass, intermediates and the final biopolymer (Bio-Ac) have been characterized by means of NMR, FTIR and GPC analysis. Bio-Ac shows good performance when used as retanning agent to produce leather. Physical and mechanical properties of the leather treated with Bio-Ac have been compared with acrylic resin retanned leather, showing similar performance. The reported protocol represents an environmental-friendly interesting alternative to traditional petrochemical based retanning agents, commonly used by the leather industry.

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“…The interaction between the extraction method and the source material induces a variation among products, which differ by various parameters, such as the free amino acid to protein/peptide rate, amino acid chirality, molecular weight of the constituents and electrical conductivity. When Cavani and collaborators [76] tested 22 different products, they found total amino acidic contents to vary from 5.3 to 52.5%, free amino acidic contents from 0.76 to 19.6%, and electrical conductivity from 3.9 to 20.0 dS m −1 . In particular, products stemming from the chemical hydrolysis of the source matrix by way of strong bases or acids under a high temperature and pressure, can lead to products with high free-amino acid contents, racemization, and high electrical conductivity.…”

Section: Protein Hydrolysatesmentioning

confidence: 99%

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

2021

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Climate change is a pressing matter of anthropogenic nature to which agriculture contributes by abusing production inputs such as inorganic fertilizers and fertigation water, thus degrading land and water sources. Moreover, as the increase in the demand of food in 2050 is estimated to be 25 to 70% more than what is currently produced today, a sustainable intensification of agriculture is needed. Biostimulant substances are products that the EU states work by promoting growth, resistance to plant abiotic stress, and increasing produce quality, and may be a valid strategy to enhance sustainable agricultural practice. Presented in this review is a comprehensive look at the scientific literature regarding the widely used and EU-sanctioned biostimulant substances categories of silicon, seaweed extracts, protein hydrolysates, and humic substances. Starting from their origin, the modulation of plants’ hormonal networks, physiology, and stress defense systems, their in vivo effects are discussed on some of the most prominent vegetable species of the popular plant groupings of cucurbits, leafy greens, and nightshades. The review concludes by identifying several research areas relevant to biostimulant substances to exploit and enhance the biostimulant action of these substances and signaling molecules in horticulture.

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What we talk about when we talk about protein hydrolyzate-based biostimulants

Cited by 10 publications

References 9 publications

Celery (Apium graveolens L.) Performances as Subjected to Different Sources of Protein Hydrolysates

Celery (Apium graveolens L.) Performances as Subjected to Different Sources of Protein Hydrolysates

Efficient Chemo-Enzymatic Transformation of Animal Biomass Waste for Eco-Friendly Leather Production

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

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