Interaction between Humic Substances and Plant Hormones for Phosphorous Acquisition

Jindo, Keiji; Canellas, Luciano Pasqualoto; Albacete, Alfonso; Santos, Lidiane Figueiredo dos; Rocha, Rafael Luiz Frinhani; Baía, Daiane Carvalho; Canellas, Natália O. A.; Goron, Travis L.; Olivares, Fábio Lopes

doi:10.3390/agronomy10050640

Cited by 48 publications

(38 citation statements)

References 155 publications

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“…HA are comprised of amino acids, polysaccharide residues and aromatic and aliphatic compounds, with the functional groups of aromatic rings, carboxyl (R-COOH) and hydroxyl (R-OH) seemingly playing an important role in plant nutrition by forming complexes with the cations of essential nutrients [17,28,32,33]. Hormone-like behavior has also been attributed to HA, with the most common being due to the presence of auxin [34], molecules mimicking the same function [35,36] or by interacting with plant hormone signaling pathways [37]. However, HA were also found to increase peroxidase (POD) expression, which has been reported to be involved in auxin metabolism [38].…”

Section: Humic Acidsmentioning

confidence: 99%

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

et al. 2021

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As the world develops and population increases, so too does the demand for higher agricultural output with lower resources. Plant biostimulants appear to be one of the more prominent sustainable solutions, given their natural origin and their potential to substitute conventional methods in agriculture. Classified based on their source rather than constitution, biostimulants such as humic substances (HS), protein hydrolysates (PHs), seaweed extracts (SWE) and microorganisms have a proven potential in improving plant growth, increasing crop production and quality, as well as ameliorating stress effects. However, the multi-molecular nature and varying composition of commercially available biostimulants presents challenges when attempting to elucidate their underlying mechanisms. While most research has focused on the broad effects of biostimulants in crops, recent studies at the molecular level have started to unravel the pathways triggered by certain products at the cellular and gene level. Understanding the molecular influences involved could lead to further refinement of these treatments. This review comprises the most recent findings regarding the use of biostimulants in plants, with particular focus on reports of their molecular influence.

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Section: Humic Acidsmentioning

confidence: 99%

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

et al. 2021

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“…Humic substances are not only considered an essential component of soil organic carbon, but also well known as a biostimulant, which can perform phytohormone‐like activities to induce nutrient uptake, whereas plant response differs depending on the origin of humic acids, concentration, method of application and stage of plant development (Jindo, Canellas, et al, 2020). As stated by Jindo, Olivares, et al (2020), anatomical and biochemical changes in the root system stimulated by humic substances are the main factors responsible for increased nutrient uptake, along with the increase in the nutrient availability through chelation (Jindo, Olivares, et al, 2020).…”

Section: Plant Response To Abiotic Stress and Biostimulant Applicationmentioning

confidence: 99%

Linking abiotic stress, plant metabolites, biostimulants and functional food

Teklić

Parađiković

Špoljarević

et al. 2020

Annals of Applied Biology

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Plants must cope with different environmental stresses during their whole lifetime. Abiotic stresses like drought, salt, mineral nutrition disturbances and temperature stress are commonly interconnected through some physiological events in stressed plants, such as the synthesis of protective plant compounds as a response to stress. Many of these, produced within plant primary or secondary metabolism, act as functional compounds not exclusively in plants but in other organisms as well. Concurrently, many of the active compounds in biostimulants which can support plant stress tolerance and productivity in adverse growth conditions are the metabolites or intermediates that may influence the plant's edible parts nutritional quality. Such effects of biostimulants application are not elucidated enough, therefore, we aimed to give an overview of recent advances in the research related to the interplay among abiotic stress, plant response, biostimulants effects and plant‐derived functional food, focusing on plant metabolites as the link which connects the environment with the food chain.

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“…On the contrary, in V. locusta Ca content in leaves was enhanced only by HS, regardless of CaP functionalization. In this case, despite an increased root absorption of this element in presence of CaP alone or CaP–HS, Ca translocation to the epigeous portion was significantly stimulated by HS, suggesting that HS could favor the xylematic transport of this macronutrient by a hormone-like activity [ 3 , 33 ].…”

Section: Discussionmentioning

confidence: 99%

“…Among the various biostimulants, humic substances (HS) are among the most studied in virtue of (i) their ability to stimulate plant growth and increase nutrient uptake and hormone production; (ii) their natural occurrence in soils; and (iii) their positive interaction with soil bacterial communities [ 3 , 4 ]. As an example, Purwanto et al studied the effects of different combinations of HS extracted from composted manure and P 2 O 5 on different corn cultivars [ 5 ], reporting a substantial growth in the crop yields due to an increase in the crop root dimensions—that in turn boosted the P uptake—to a significant improvement of the physiological performance of plants.…”

Section: Introductionmentioning

confidence: 99%

Calcium Phosphate Particles Coated with Humic Substances: A Potential Plant Biostimulant from Circular Economy

et al. 2021

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Nowadays, the use of biostimulants to reduce agrochemical input is a major trend in agriculture. In this work, we report on calcium phosphate particles (CaP) recovered from the circular economy, combined with natural humic substances (HSs), to produce a plant biostimulant. CaPs were obtained by the thermal treatment of Salmo salar bones and were subsequently functionalized with HSs by soaking in a HS water solution. The obtained materials were characterized, showing that the functionalization with HS did not sort any effect on the bulk physicochemical properties of CaP, with the exception of the surface charge that was found to get more negative. Finally, the effect of the materials on nutrient uptake and translocation in the early stages of development (up to 20 days) of two model species of interest for horticulture, Valerianella locusta and Diplotaxis tenuifolia, was assessed. Both species exhibited a similar tendency to accumulate Ca and P in hypogeal tissues, but showed different reactions to the treatments in terms of translocation to the leaves. CaP and CaP–HS treatments lead to an increase of P accumulation in the leaves of D. tenuifolia, while the treatment with HS was found to increase only the concentration of Ca in V. locusta leaves. A low biostimulating effect on both plants’ growth was observed, and was mainly scribed to the low concentration of HS in the tested materials. In the end, the obtained material showed promising results in virtue of its potential to elicit phosphorous uptake and foliar translocation by plants.

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Interaction between Humic Substances and Plant Hormones for Phosphorous Acquisition

Cited by 48 publications

References 155 publications

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

Linking abiotic stress, plant metabolites, biostimulants and functional food

Calcium Phosphate Particles Coated with Humic Substances: A Potential Plant Biostimulant from Circular Economy

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