Change in ATP-binding cassette B1/19, glutamine synthetase and alcohol dehydrogenase gene expression during root elongation in Betula pendula Roth and Alnus glutinosa L. Gaertn in response to leachate and leonardite humic substances

Tahiri, Abdelghani; Delporte, Fabienne; Muhovski, Yordan; Ongena, Marc; Thonart, Philippe; Druart, Philippe

doi:10.1016/j.plaphy.2015.11.004

Cited by 18 publications

(10 citation statements)

References 47 publications

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“…Details about the effect of HS at the cellular level in roots are depicted in Figure 6. Beside root ultrastructure modifications, HS can induce lateral root emergence, root elongation and root hair [81,[84][85][86][87] (Figure 7). The mechanism implied, is apparently mediated by HS-dependent effects on auxin polar transport and nitric oxide (NO) signaling pathway [31,66,82,86] (Figure 8).…”

Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

“…In support of this hypothesis, applying inhibitors of auxin-signaling (PCIB) and efflux (TIBA) did not hamper the effect of NO, which was however decreased by NO scavengers. NO is generated Beside root ultrastructure modifications, HS can induce lateral root emergence, root elongation and root hair [81,[84][85][86][87] (Figure 7). The mechanism implied, is apparently mediated by HS-dependent effects on auxin polar transport and nitric oxide (NO) signaling pathway [31,66,82,86] (Figure 8).…”

Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

“…NO is generated Beside root ultrastructure modifications, HS can induce lateral root emergence, root elongation and root hair [81,[84][85][86][87] (Figure 7). The mechanism implied, is apparently mediated by HS-dependent effects on auxin polar transport and nitric oxide (NO) signaling pathway [31,66,82,86] (Figure 8). The role of auxin in modulating root growth and morphology in this case lies in the fact that HS enclose in their structure indole-3-acetic acid (IAA) and other molecules (e.g., phenylacetic acid, indole-3-butyric acid, carboxylic acids, amino acids) endowed with IAA-like activity [68,69,80,84].…”

Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

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Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters

2021

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Humic substances (HS) are dominant components of soil organic matter and are recognized as natural, effective growth promoters to be used in sustainable agriculture. In recent years, many efforts have been made to get insights on the relationship between HS chemical structure and their biological activity in plants using combinatory approaches. Relevant results highlight the existence of key functional groups in HS that might trigger positive local and systemic physiological responses via a complex network of hormone-like signaling pathways. The biological activity of HS finely relies on their dosage, origin, molecular size, degree of hydrophobicity and aromaticity, and spatial distribution of hydrophilic and hydrophobic domains. The molecular size of HS also impacts their mode of action in plants, as low molecular size HS can enter the root cells and directly elicit intracellular signals, while high molecular size HS bind to external cell receptors to induce molecular responses. Main targets of HS in plants are nutrient transporters, plasma membrane H+-ATPases, hormone routes, genes/enzymes involved in nitrogen assimilation, cell division, and development. This review aims to give a detailed survey of the mechanisms associated to the growth regulatory functions of HS in view of their use in sustainable technologies.

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Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

Section: Effects Of Humic Substances On Plant Growth Via Hormone-signaling Controlmentioning

confidence: 99%

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Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters

2021

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“…Leonardite is an oxidized form of lignite, very enriched in HS and characterized by well-known auxin-like effects [14,15]. Tahiri et al [16] showed that HS extracted from leonardite influenced the whole-plant physiology by a transcriptional mechanism of regulation associated with a hormone-like activity, as well as changes in nitrogen and carbon metabolisms in Betula pendula and Alnus glutinosa . Leonardite application has been shown to improve Fe nutrition and N and P uptake, enhancing root growth and crop yield [17].…”

Section: Introductionmentioning

confidence: 99%

Molecular and Morphological Changes Induced by Leonardite-based Biostimulant in Beta vulgaris L.

Barone

Bertoldo

Magro³

et al. 2019

Plants

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Humic substances extracted from leonardite are widely considered to be bioactive compounds, influencing the whole-plant physiology and the crop yield. The aim of this work was to evaluate the effect of a new formulate based on leonardite in the early stage of growth of sugar beet (Beta vulgaris L.). A commercial preparation of leonardite (BLACKJAK) was characterized by ionomic analysis, solid-state 13C MAS NMR spectroscopy. Seedlings of sugar beet were grown in Hoagland’s solution under controlled conditions. After five days of growth, an aliquot of the concentrated BLACKJAK was added to the solution to obtain a final dilution of 1:1000 (0.5 mg C L−1). The sugar beet response in the early stage of growth was determined by evaluating root morphological traits as well as the changes in the expression of 53 genes related to key morphophysiological processes. Root morphological traits, such as total root length, fine root length (average diameter < 0.5 mm), and number of root tips, were significantly (p < 0.001) increased in plants treated with BLACKJAK, compared to the untreated plants at all sampling times. At the molecular level, BLACKJAK treatment upregulated many of the evaluated genes. Moreover, both Real Time PCR and digital PCR showed that genes involved in hormonal response, such as PIN, ARF3, LOGL 10, GID1, and BRI1, were significantly (p < 0.05) upregulated by treatment with BLACKJAK. Our study provides essential information to understand the effect of a leonardite-based formulate on plant growth hormone metabolism, although the molecular and physiological basis for these complicated regulatory mechanisms deserve further investigations.

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“…Residues from the partial oxidation of the dead biomass of plants is considered to be the source of organic substances that are added to soil as humus [3][4][5]. Currently, there is an increase in the quantity of humic-based products available to plant growers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Oxidized Brown Coal Humic Acid Fertilizer on the Relative Height Growth Rate of Three Tree Species

Tsetsegmaa

Akhmadi

Cho

et al. 2018

Forests

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This study aimed to identify the effects of oxidized brown coal humic acid fertilizer on the relative growth rate of several tree species intended for reforestation. Field experiments were carried out during 2011-2014 at the Research and Experimental Center for Combating Desertification located at the Elsen Tasarkhai station in central Mongolia. The trees studied were Populus sibirica Tausch., Salix ledebouriana Trautv., and Acer tataricum L. The experiment was conducted with concentrations of 2000, 10,000, and 20,000 mg L −1 of humic acid fertilization treatment. Measurement of the relative height growth rate (RHGR) was undertaken for a period of four years. The results demonstrated significant differences between the humic fertilizer concentrations, which varied depending on the species. Compared to monthly RHGR over the study period, the treatment using fertilizers yielded significantly better tree growth. P. sibirica, when treated with 2000 mg L −1 and 10,000 mg L −1 humic acid fertilizers, had significant height growth rates. S. ledebouriana with 20,000 mg L −1 of humic acid fertilzers treatments showed the highest RHGR. In addition, when the humic acid treatments were compared to the control, results showed that oxidized brown coal humic acid fertilizers as an organic fertilizer can have a significant effect on the growth of A. tataricum. The results equally showed that the soil chemical properties EC, CO 2 , NO 3 , and K 2 O were significant among all the treatments compared to control. The effect on P 2 O 5 significantly increased in all the treatments; however, there was no significant effect on pH and Mg among all treatments. Combining the results obtained with reforestation and sustainable land-management practices can help to improve soil organics in degraded sandy soil regions.

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Change in ATP-binding cassette B1/19, glutamine synthetase and alcohol dehydrogenase gene expression during root elongation in Betula pendula Roth and Alnus glutinosa L. Gaertn in response to leachate and leonardite humic substances

Cited by 18 publications

References 47 publications

Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters

Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters

Molecular and Morphological Changes Induced by Leonardite-based Biostimulant in Beta vulgaris L.

Effects of Oxidized Brown Coal Humic Acid Fertilizer on the Relative Height Growth Rate of Three Tree Species

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