A Graminaceae-derived protein hydrolysate and its fractions provide differential growth and modulate qualitative traits of lettuce grown under non-saline and mild salinity conditions

El‐Nakhel, Christophe; Cristofano, Francesco; Colla, Giuseppe; Pii, Youry; Lucini, Luigi; Rouphael, Youssef

doi:10.1016/j.scienta.2023.112130

Cited by 9 publications

(11 citation statements)

References 47 publications

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“…The application of a biostimulant amino acid to a salt-resistant variety of basil (Ocimun basilicum L.) improved production under saline conditions [15]. Treatment with a hydrolyzed protein of plant origin enhanced the lettuce (Lactuca sativa L.) and spinach (Spinacia oleracea L.) production under moderate salinity, although its effect varied depending on its molecular fraction [16,17].…”

Section: Discussionmentioning

confidence: 99%

“…The use of biostimulants could prove to be an effective tool in reducing the toxic effect of salinity in plants, partly due to a reduction in the uptake and accumulation of Na + and Cl − ions [12]. Thus, the application of chitosan-based salicylic acid nanocomposite in a vineyard (Vitis vinifera cv 'Sultana') [13], the foliar application of 24-epibrassinolide to pepper (Capsicum annuum L.) [14], the treatment of basil (Ocimun basilicum L.) with a hydrolyzed animal protein-based biostimulant [15], the application of a graminaceaederived protein hydrolysate and its fractions to lettuce (Lactuca sativa L.) [16], the addition of a protein hydrolysate of plant origin to spinach (Spinacia oleracea L.) [17], the application of the hydroalcoholic extracts of brown algae (Sargassum spp.) to tomato (Solanum lycopersicum L.) [18], and the addition of Ulva intestinalis (L.) extract to bean (Phaseolus vulgaris L.) [19] have been found to improve production and quality under saline conditions.…”

Section: Introductionmentioning

confidence: 99%

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Corn Steep Liquor Application Improves Pepper (Capsicum annum L.) Tolerance to Salinity

Navarro-Morillo,

Pardo-Pina,

Garcia-Sánchez

et al. 2023

Horticulturae

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Salinity, caused by irrigation with water containing high salt concentrations, excessive fertilization, or the loss of leaching capacity in some soils, is a serious problem on a global scale. Its incidence leads to osmotic and specific effects, as well as an imbalance in nutrient uptake that hinders the growth of most crops. Biostimulants can improve salt tolerance by reducing the uptake and accumulation of toxic ions. Corn steep liquor (CSL) is a byproduct of corn cleaning and maceration. This study investigates whether CSL application induces adaptive responses in pepper (Capsicum annuum L.) plants cultivated under saline conditions. Four treatments were carried out with pepper plants in a culture chamber: irrigation with Hoagland nutrient solution; irrigation with 100 mM NaCl in the Hoagland nutrient solution; irrigation with 100 mM NaCl in the Hoagland nutrient solution and the foliar application of CSL at 5 mL L−1 every 7 days; and irrigation with 100 mM NaCl in the Hoagland nutrient solution and root application of CSL at 5 mL L−1 every 7 days. The beneficial effect of CSL in reducing the phytotoxicity of salt stress was found to be due to an improvement in the photosynthetic efficiency and a reduction in the generation of reactive oxygen species. Thus, the increase in MDA concentration due to saline treatment is less when applying CSL, which is 3.5 times less when it is performed via the foliar route and 4.6 times if the treatment is on the root. The results show that CSL application increased the aerial biomass and leaf area under saline conditions through physiological mechanisms that varied depending on the application method.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corn Steep Liquor Application Improves Pepper (Capsicum annum L.) Tolerance to Salinity

Navarro-Morillo,

Pardo-Pina,

Garcia-Sánchez

et al. 2023

Horticulturae

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“…Many studies (e.g., [ 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 ]) have reported beneficial effects of the application of protein hydrolysate biostimulants on crop growth, yield and product quality (e.g., in tomato, spinach, lettuce, celery, melon, chickpea, maize or beans). For example, Testani et al [ 79 ] in Capsicum annuum and Choi et al [ 80 ] in Solanum lycopersicum and Lactuca sativa observed that protein hydrolysates increased nutrient uptake, especially nitrogen, by acting directly on enzymes of nitrogen and carbon metabolism, such as glutamine synthetase, glutamate synthase, nitrate reductase, nitrite reductase, malate and isocitrate dehydrogenases and citrate synthase; these results are in agreement with those obtained in Zea mays plants [ 81 ].…”

Section: Protein Hydrolysatesmentioning

confidence: 99%

“…Many recent reports support the use of biostimulants based on protein hydrolysates of agroindustrial by-products to enhance the responses of horticultural crops to different abiotic stresses. El-Nakhel et al [ 78 ] evaluated a protein hydrolysate derived from plants of the Poaceae family in lettuce plants grown under various salinity conditions and found increased levels of antioxidant metabolites, such as total phenolic acids, flavonoids and lutein, with differences depending on the protein hydrolysate fraction used. Along the same lines, Zuzunaga-Rosas et al [ 57 ] evaluated the effects of the biostimulant Balox ® , mentioned above, on Solanum lycopersicum plants, reporting improved growth under salt stress conditions, and increased foliar levels of photosynthetic pigments and total soluble sugars, not only under stress conditions but also in the absence of salt.…”

Section: Agroindustrial By-products As a Source Of Biostimulantmentioning

confidence: 99%

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Agroindustrial By-Products as a Source of Biostimulants Enhancing Responses to Abiotic Stress of Horticultural Crops

Zuzunaga-Rosas,

Boscaiu,

Vicente

2024

IJMS

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Together with other abiotic stresses such as drought and high temperatures, salt stress is one of the most deleterious environmental factors affecting plant development and productivity, causing significant crop yield reductions. The progressive secondary salinisation of irrigated farmland is a problem as old as agriculture but is aggravated and accelerated in the current climate change scenario. Plant biostimulants, developed commercially during the last decade, are now recognised as innovative, sustainable agronomic tools for improving crop growth, yield, plant health and tolerance to abiotic stress factors such as water and soil salinity. Biostimulants are a disparate collection of biological extracts, natural and synthetic organic compounds or mixtures of compounds, inorganic molecules and microorganisms, defined by the positive effects of their application to crops. The growing interest in biostimulants is reflected in the increasing number of scientific reports published on this topic in recent years. However, the processes triggered by the biostimulants and, therefore, their mechanisms of action remain elusive and represent an exciting research field. In this review, we will mainly focus on one specific group of biostimulants, protein hydrolysates, generally produced from agricultural wastes and agroindustrial by-products—contributing, therefore, to more sustainable use of resources and circular economy—and primarily on the consequences of their application on the abiotic stress resistance of horticultural crops. We will summarise data in the scientific literature describing the biostimulants’ effects on basic, conserved mechanisms activated in response to elevated salinity and other abiotic stress conditions, such as the control of ion transport and ion homeostasis, the accumulation of osmolytes for osmotic adjustment, or the activation of enzymatic and non-enzymatic antioxidant systems to counteract the induced secondary oxidative stress. The collected information confirms the positive effects of biostimulants on crop tolerance to abiotic stress by enhancing morphological, physiological and biochemical responses, but also highlights that more work is needed to further establish the molecular mechanisms underlying biostimulants’ effects.

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Foliar applications of a Malvaceae‐derived protein hydrolysate and its fractions differentially modulate yield and functional traits of tomato under optimal and suboptimal nitrogen application

Cardarelli,

Ceccarelli,

El Nakhel

et al. 2024

J Sci Food Agric

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BACKGROUNDProtein hydrolysates (PHs) can enhance plant nitrogen nutrition and improve the quality of vegetables, depending on their bioactive compounds. A tomato greenhouse experiment was conducted under both optimal (14 mM) and suboptimal (2 mM) nitrogen (N‐NO3) conditions. Tomatoes were treated with a new Malvaceae‐derived PH (MDPH) and its molecular fractions (MDPH1, >10 kDa; MDPH2, 1–10 kDa and MDPH3, <1 kDa).RESULTSUnder optimal N conditions, the plants increased biomass and fruit yield, and showed a higher photosynthetic pigment content in leaves in comparison with suboptimal N, whereas under N‐limiting conditions, an increase in dry matter, soluble solid content (SSC) and lycopene, a reduction in firmness, and changes in organic acid and phenolic compounds were observed. With 14 mM N‐NO3, MDPH3 stimulated an increase in dry weight and increased yield components and lycopene in the fruit. The MDPH2 fraction also resulted in increased lycopene accumulation in fruit under 14 mM N‐NO3. At a low N level, the PH fractions showed distinct effects compared with the whole MDPH and the control, with an increase in biomass for MDPH1 and MDPH2 and a higher pigment content for MDPH3. Regardless of N availability, all the fractions affected fruit quality by increasing SSC, whereas MDPH2 and MDPH3 modified organic acid content and showed a higher concentration of flavonols, lignans, and stilbenes.CONCLUSIONThe molecular weight of the peptides modifies the effect of PHs on plant performance, with different behavior depending on the level of N fertilization, confirming the effectiveness of fractioning processes. © 2024 Society of Chemical Industry.

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A Graminaceae-derived protein hydrolysate and its fractions provide differential growth and modulate qualitative traits of lettuce grown under non-saline and mild salinity conditions

Cited by 9 publications

References 47 publications

Corn Steep Liquor Application Improves Pepper (Capsicum annum L.) Tolerance to Salinity

Corn Steep Liquor Application Improves Pepper (Capsicum annum L.) Tolerance to Salinity

Agroindustrial By-Products as a Source of Biostimulants Enhancing Responses to Abiotic Stress of Horticultural Crops

Foliar applications of a Malvaceae‐derived protein hydrolysate and its fractions differentially modulate yield and functional traits of tomato under optimal and suboptimal nitrogen application

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