How Plants Handle Trivalent (+3) Elements

Poschenrieder, Charlotte; Busoms, Sílvia; Barceló, Juan Antonio

doi:10.3390/ijms20163984

Cited by 34 publications

(15 citation statements)

References 209 publications

(232 reference statements)

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“…One of the main strategies reported for Al exclusion is mediated by organic acid (OA) efflux from the root apex (Yang et al, 2013;Poschenrieder et al, 2019), a ubiquitous mechanism in all plant cells that reduces Al damage by forming stable compounds with Al 3+ ions in the rhizosphere (Bojórquez-Quintal et al, 2017). The first genes linked to Al tolerance were malate and citrate organic acid transporters in wheat (Triticum aestivum), sorghum (Sorghum bicolor), and barley (Hordeum vulgare) (Sasaki et al, 2004;Furukawa et al, 2007;Magalhaes et al, 2007).…”

Section: Genetic Mechanisms Underlying Heavy Metal Tolerancementioning

confidence: 99%

Epigenetic Control of Plant Response to Heavy Metal Stress: A New View on Aluminum Tolerance

et al. 2020

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High concentrations of heavy metal (HM) ions impact agronomic staple crop production in acid soils (pH ≤ 5) due to their cytotoxic, genotoxic, and mutagenic effects. Among cytotoxic ions, the trivalent aluminum cation (Al3+) formed by solubilization of aluminum (Al) into acid soils, is one of the most abundant and toxic elements under acidic conditions. In recent years, several studies have elucidated the different signal transduction pathways involved in HM responses, identifying complementary genetic mechanisms conferring tolerance to plants. Although epigenetics has become more relevant in abiotic stress studies, epigenetic mechanisms underlying plant responses to HM stress remain poorly understood. This review describes the main epigenetic mechanisms related to crop responses during stress conditions, specifically, the molecular evidence showing how epigenetics is at the core of plant adaptation responses to HM ions. We highlight the epigenetic mechanisms that induce Al tolerance. Likewise, we analyze the pivotal relationship between epigenetic and genetic factors associated with HM tolerance. Finally, using rice as a study case, we performed a general analysis over previously whole-genome bisulfite-seq published data. Specific genes related to Al tolerance, measured in contrasting tolerant and susceptible rice varieties, exhibited differences in DNA methylation frequency. The differential methylation patterns could be associated with epigenetic regulation of rice responses to Al stress, highlighting the major role of epigenetics over specific abiotic stress responses.

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Section: Genetic Mechanisms Underlying Heavy Metal Tolerancementioning

confidence: 99%

Epigenetic Control of Plant Response to Heavy Metal Stress: A New View on Aluminum Tolerance

et al. 2020

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“…In general terms, it is accepted that important toxic metal elements are in contact with the root tip and can be internalized via symplast or apoplast, depending on their chemical nature [ 11 ]. Most of the plant´s constitutive transporters are part of the active transport system that functions with divalent cations (Ca 2+ and Mg 2+ ); therefore, many of the metal(oid) elements that have this chemical valence will find them suitable for entrance into the root tip [ 18 ]. Trivalent ions, such as Al 3+ , are not so abundant in nature but can be liberated due to human activity; thus, only one transporter has been related to Al 3+ uptake in plants: NRAMP Aluminum Transporter 1 (NRAT1) [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Metal and Metalloid Toxicity in Plants: An Overview on Molecular Aspects

Angulo-Bejarano

Puente-Rivera

Cruz-Ortega

2021

Plants

205

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Worldwide, the effects of metal and metalloid toxicity are increasing, mainly due to anthropogenic causes. Soil contamination ranks among the most important factors, since it affects crop yield, and the metals/metalloids can enter the food chain and undergo biomagnification, having concomitant effects on human health and alterations to the environment. Plants have developed complex mechanisms to overcome these biotic and abiotic stresses during evolution. Metals and metalloids exert several effects on plants generated by elements such as Zn, Cu, Al, Pb, Cd, and As, among others. The main strategies involve hyperaccumulation, tolerance, exclusion, and chelation with organic molecules. Recent studies in the omics era have increased knowledge on the plant genome and transcriptome plasticity to defend against these stimuli. The aim of the present review is to summarize relevant findings on the mechanisms by which plants take up, accumulate, transport, tolerate, and respond to this metal/metalloid stress. We also address some of the potential applications of biotechnology to improve plant tolerance or increase accumulation.

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“…Although, under B toxicity, normally BOR1 is quickly degraded to avoid excessive transport of B to the shoot (Poschenrieder et al 2019), in rice an enhancement of other aquaporins, such as OsPIP2,4 and OsPIP2,7 (Kumar et al 2014), to augment B movement to the leaves, was observed. Sutton et al (2007), in barley plants, demonstrated an enhanced expression of efflux transporters in cells of leaves and roots; the key to tolerance lies in an increase in B efflux from the sensitive symplast to the apoplast, with later efflux of this B from hydathodes to the leaf surface, mediated by BOR1 (Reid and Fitzpatrick 2009).…”

Section: The Influence Of Deficiencies Of Micronutrients On the Intermentioning

confidence: 99%

Interrelations of nutrient and water transporters in plants under abiotic stress

Bárzana

Ríos

Lopez-Zaplana

et al. 2020

Physiologia Plantarum

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Environmental changes cause abiotic stress in plants, primarily through alterations in the uptake of the nutrients and water they require for their metabolism and growth and to maintain their cellular homeostasis. The plasma membranes of cells contain transporter proteins, encoded by their specific genes, responsible for the uptake of nutrients and water (aquaporins). However, their interregulation has rarely been taken into account. Therefore, in this review we identify how the plant genome responds to abiotic stresses such as nutrient deficiency, drought, salinity and low temperature, in relation to both nutrient transporters and aquaporins. Some general responses or regulation mechanisms can be observed under each abiotic stress such as the induction of plasma membrane transporter expression during macronutrient deficiency, the induction of tonoplast transporters and reduction of aquaporins during micronutrients deficiency. However, drought, salinity and low temperatures generally cause an increase in expression of nutrient transporters and aquaporins in tolerant plants. We propose that both types of transporters (nutrients and water) should be considered jointly in order to better understand plant tolerance of stresses.

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How Plants Handle Trivalent (+3) Elements

Cited by 34 publications

References 209 publications

Epigenetic Control of Plant Response to Heavy Metal Stress: A New View on Aluminum Tolerance

Epigenetic Control of Plant Response to Heavy Metal Stress: A New View on Aluminum Tolerance

Metal and Metalloid Toxicity in Plants: An Overview on Molecular Aspects

Interrelations of nutrient and water transporters in plants under abiotic stress

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