High accumulation of phenolics and amino acids confers tolerance to the combined stress of cobalt and copper in barley (Hordeum vulagare)

Lwalaba, Jonas Lwalaba Wa; Zvobgo, Gerald; Mwamba, Theodore M.; Louis, Laurence Tennyson; Fu, Liangbo; Kirika, Bibich Ansey; Tshibangu, Audry Kazadi; Adil, Muhammad Faheem; Sehar, Shafaque; Mukobo, Robert Prince; Zhang, Guoping

doi:10.1016/j.plaphy.2020.08.038

Cited by 25 publications

(19 citation statements)

References 57 publications

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“…Phenolic compounds are secondary metabolites, playing numerous functions in plant metabolism, including defense mechanisms against various stressors. They are recognized as biomarkers of plant response in conditions of elevated metal concentration in soil/substrate [54,55], and their enhanced biosynthesis under metal stress, along with their antioxidant action, has been confirmed for many plants and various tissue types [45,[55][56][57][58]. Surprisingly, in the present study the accumulation of phenolic metabolites was noted neither in leaves nor roots of Paulownia elongata S. × Paulownia fortunei.…”

Section: Physiological Responsecontrasting

confidence: 55%

The Possibility of Using Paulownia elongata S. Y. Hu × Paulownia fortunei Hybrid for Phytoextraction of Toxic Elements from Post-Industrial Wastes with Biochar

Drzewiecka

Gąsecka

Magdziak

et al. 2021

Plants

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The potential of the Paulownia hybrid for the uptake and transport of 67 elements along with the physiological response of plants cultivated in highly contaminated post-industrial wastes (flotation tailings—FT, and mining sludge—MS) was investigated. Biochar (BR) was added to substrates to limit metal mobility and facilitate plant survival. Paulownia could effectively uptake and translocate B, Ca, K, P, Rb, Re and Ta. Despite severe growth retardation, chlorophyll biosynthesis was not depleted, while an increased carotenoid content was noted for plants cultivated in waste materials. In Paulownia leaves and roots hydroxybenzoic acids (C6-C1) were dominant phenolics, and hydroxycinnamic acids/phenylpropanoids (C6-C3) and flavonoids (C6-C3-C6) were also detected. Plant cultivation in wastes resulted in quantitative changes in the phenolic fraction, and a significant drop or total inhibition of particular phenolics. Cultivation in waste materials resulted in increased biosynthesis of malic and succinic acids in the roots of FT-cultivated plants, and malic and acetic acids in the case of MS/BR substrate. The obtained results indicate that the addition of biochar can support the adaptation of Paulownia seedlings growing on MS, however, in order to limit unfavorable changes in the plant, an optimal addition of waste is necessary.

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Section: Physiological Responsecontrasting

confidence: 55%

The Possibility of Using Paulownia elongata S. Y. Hu × Paulownia fortunei Hybrid for Phytoextraction of Toxic Elements from Post-Industrial Wastes with Biochar

Drzewiecka

Gąsecka

Magdziak

et al. 2021

Plants

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“…Some organic acids such as citrate and malate are known to participate in HM tolerance directly or indirectly [ 174 ]. The increase of these organic acids might be responsible for energy production under the combined treatment to fulfill the higher energy demand by metal transporters to improve Co and Cu tolerance [ 175 ]. These metal transporters, including ABC type transporters, are a group of organic solute transporters that help in vacuolar sequestration of “PC-metal complexes” and play an important role in metal ion homeostasis and tolerance [ 176 , 177 ].…”

Section: Sequestration and Compartmentalization: Plants’ Way To Alleviate The Hm Toxicitymentioning

confidence: 99%

A Comprehensive Review on the Heavy Metal Toxicity and Sequestration in Plants

et al. 2021

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Heavy metal (HM) toxicity has become a global concern in recent years and is imposing a severe threat to the environment and human health. In the case of plants, a higher concentration of HMs, above a threshold, adversely affects cellular metabolism because of the generation of reactive oxygen species (ROS) which target the key biological molecules. Moreover, some of the HMs such as mercury and arsenic, among others, can directly alter the protein/enzyme activities by targeting their –SH group to further impede the cellular metabolism. Particularly, inhibition of photosynthesis has been reported under HM toxicity because HMs trigger the degradation of chlorophyll molecules by enhancing the chlorophyllase activity and by replacing the central Mg ion in the porphyrin ring which affects overall plant growth and yield. Consequently, plants utilize various strategies to mitigate the negative impact of HM toxicity by limiting the uptake of these HMs and their sequestration into the vacuoles with the help of various molecules including proteins such as phytochelatins, metallothionein, compatible solutes, and secondary metabolites. In this comprehensive review, we provided insights towards a wider aspect of HM toxicity, ranging from their negative impact on plant growth to the mechanisms employed by the plants to alleviate the HM toxicity and presented the molecular mechanism of HMs toxicity and sequestration in plants.

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“…There is considerable evidence with respect to the involvement of phenolic compounds in protection mechanisms against copper toxicity in plants and algae growing in conditions of metal stress (Kováčik et al 2010 ; López et al 2015 ; Lwalaba et al 2020 ; Sharma et al 2019 ; Stiller et al 2021 ). However, little is known about the implication of amino acids.…”

Section: Introductionmentioning

confidence: 99%

Copper toxicity leads to accumulation of free amino acids and polyphenols in Phaeodactylum tricornutum diatoms

Santiago-Díaz

Rivero

Rico

et al. 2023

Environ Sci Pollut Res

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This work is focused on the effect of lethal and sub-lethal copper (Cu) concentrations on the free amino acid and polyphenol production by the marine diatom Phaeodactylum tricornutum (P. tricornutum) after 12, 18, and 21 days of exposure. The concentrations of 10 amino acids (arginine, aspartic acid, glutamic acid, histidine, lysine, methionine, proline, valine, isoleucine, and phenylalanine) and 10 polyphenols (gallic acid, protocatechuic acid, p-coumaric acid, ferulic acid, catechin, vanillic acid, epicatechin syringic acid, rutin, and gentisic acid) were measured by RP-HPLC. Under lethal doses of Cu, free amino acids reached levels significantly higher than those in the control cells (up to 21.9 times higher), where histidine and methionine showed the highest increases (up to 37.4 and 65.8 times higher, respectively). The total phenolic content also increased up to 11.3 and 5.59 times higher compared to the reference cells, showing gallic acid the highest increase (45.8 times greater). The antioxidant activities of cells exposed to Cu were also enhanced with increasing doses of Cu(II). They were evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging ability (RSA), cupric ion reducing antioxidant capacity (CUPRAC), and ferric reducing antioxidant power (FRAP) assays. Malonaldehyde (MDA) exhibited the same tendency: cells grown at the highest lethal Cu concentration yielded the highest MDA level. These findings reflect the involvement of amino acids and polyphenols in protective mechanisms to overcome the toxicity of copper in marine microalgae. Graphical Abstract

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High accumulation of phenolics and amino acids confers tolerance to the combined stress of cobalt and copper in barley (Hordeum vulagare)

Cited by 25 publications

References 57 publications

The Possibility of Using Paulownia elongata S. Y. Hu × Paulownia fortunei Hybrid for Phytoextraction of Toxic Elements from Post-Industrial Wastes with Biochar

The Possibility of Using Paulownia elongata S. Y. Hu × Paulownia fortunei Hybrid for Phytoextraction of Toxic Elements from Post-Industrial Wastes with Biochar

A Comprehensive Review on the Heavy Metal Toxicity and Sequestration in Plants

Copper toxicity leads to accumulation of free amino acids and polyphenols in Phaeodactylum tricornutum diatoms

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