Silicon nutrition mitigates the negative impacts of iron toxicity on rice photosynthesis and grain yield

Santos, Martielly Santana dos; Sanglard, Lilian Vincis Pereira; Barbosa, Marcela Lúcia; Namorato, Filipe A.; Melo, Danilo C. de; Franco, William Carlos Gonzaga; Pérez-Molina, Junior Pastor; Martins, Samuel C. V.; DaMatta, Fábio M.

doi:10.1016/j.ecoenv.2019.110008

Cited by 20 publications

(14 citation statements)

References 33 publications

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“…So, closure of stomata could be considered as an avoidance mechanism in order to limit its uptake and translocation. In several studies, lower stomatal conductance was reported under high Fe toxicity (da Silva Tavares et al, 2020; dos Santos et al, 2020; Tadaiesky et al, 2020). According to Onyango et al (2019), both sensitive and tolerant varieties reduce stomatal conductance from the very first treatment of Fe.…”

Section: Fe Toxicity and Its Effect On Various Plant Attributesmentioning

confidence: 95%

Fe toxicity in plants: Impacts and remediation

Zahra

Hafeez

Shaukat

et al. 2021

Physiologia Plantarum

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Fe is the fourth abundant element in the earth crust. Fe toxicity is not often discussed in plant science though it causes severe morphological and physiological disorders, including reduced germination percentage, interferes with enzymatic activities, nutritional imbalance, membrane damage, and chloroplast ultrastructure. It also causes severe toxicity to important biomolecules, which leads to ferroptotic cell death and induces structural changes in the photosynthetic apparatus, which results in retardation of carbon metabolism. However, some agronomic practices like soil remediation through chemicals, nutrients, and organic amendments and some breeding and genetic approaches can provide fruitful results in enhancing crop production in Fe‐contaminated soils. Some quantitative trait loci have been reported for Fe tolerance in plants but the function of underlying genes is just emerging. Physiological and molecular mechanism of Fe uptake, translocation, toxicity, and remediation techniques are still under experimentation. In this review, the toxic effects of Fe on seed germination, carbon assimilation, water relations, nutrient uptake, oxidative damages, enzymatic activities, and overall plant growth and development have been discussed. The Fe dynamics in soil rhizosphere and role of remediation strategies, that is, biological, physical, and chemical, have also been described. Use of organic amendments, microbe, phytoremediation, and biological strategies is considered to be both cost and environment friendly for the purification of Fe‐contaminated soil, while to ensure better crop yield and quality the manipulation of agronomic practices are suggested.

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Section: Fe Toxicity and Its Effect On Various Plant Attributesmentioning

confidence: 95%

Fe toxicity in plants: Impacts and remediation

Zahra

Hafeez

Shaukat

et al. 2021

Physiologia Plantarum

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“…Low Si levels are also a feature of highly-weathered acid soils. Although a 'beneficial' rather than an essential nutrient, it is taken up in large amounts by rice plants, and applications to rice under Fe toxic conditions have been found to reduce Fe uptake and produce fewer leaf symptoms (Becker, Ngo & Schenk, 2020;dos Santos et al, 2020;Dufey, Gheysens, Ingabire, Lutts & Bertin, 2014). Its specific role in plant metabolism is not well understood, but probably involves a stabilising effect on cell walls as an inert deposition in lignified cells, and also by modulating lignin biosynthesis (Broadley et al, 2012).…”

Section: Siliconmentioning

confidence: 99%

Below-ground plant-soil interactions affecting adaptations of rice to iron toxicity

Kirk

Manwaring

Ueda

et al. 2021

Preprint

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Iron toxicity is a major constraint to rice production, particularly in highly-weathered soils of inland valleys in sub-Saharan Africa where the rice area is rapidly expanding. Although there is wide variation in tolerance in the rice germplasm, progress in introgressing tolerance traits into high-yielding germplasm has been slow owing to the complexity of tolerance mechanisms and large genotype by environment effects. We review current understanding of tolerance mechanisms, particularly those involving below-ground plant-soil interactions, which to date have been less studied than above-ground mechanisms. We cover processes in the rhizosphere linked to exclusion of toxic ferrous iron by oxidation, and resulting effects on the mobility of nutrient ions. We also cover the molecular physiology of below-ground processes controlling Fe retention in roots and root-shoot transport, and also plant Fe sensing. We conclude that future breeding programs should be based on well-characterised molecular markers for tolerance traits. To successfully identify such markers, the complex tolerance response should be broken down into its components based on understanding of tolerance mechanisms, and tailored screening methods developed for individual mechanisms.

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“…Moreover, Fe toxicity resulted from hypoxia can be further accentuated in soils containing high concentrations of Fe. In plants, Fe toxicity leads to nutritional disorders (Pan et al 2016;Maranguit et al 2017;Matin and Jalali 2017), impairs leaf gas exchange (Pereira et al 2013;Müller et al 2017;dos Santos et al 2019dos Santos et al , 2020, and increases the generation of hydroxyl radicals via the Fenton reaction, which damages various biomolecules such as lipids, proteins, pigments, and DNA (de Oliveira et al 2013;Stein et al 2014;Xu et al 2015;Das et al 2020;Lapaz et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…One of the main crops affected by Fe toxicity in waterlogged soils is rice, losing up to 20% of its production under these conditions, depending on the time of exposure to stress, stage of development, and genotype (Frei et al 2016). The higher availability of Fe to rice plants during hypoxia decreases plant biomass, grain production (Samaranayake et al 2012;Frei et al 2016;dos Santos et al 2020), and leaf gas exchange (Pereira et al 2013;Müller et al 2017;Saikia et al 2018;dos Santos et al 2019dos Santos et al , 2020. In addition, it increases oxidative stress (Stein et al 2014) and promotes nutritional imbalance (Müller et al 2017;dos Santos et al 2020) and leaf bronzing (Frei et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Iron toxicity increases oxidative stress and impairs mineral accumulation and leaf gas exchange in soybean plants during hypoxia

Delias

da-Silva

Martins

et al. 2021

Environ Sci Pollut Res

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Iron toxicity is a major challenge faced by plants in hypoxic soils; however, the consequences of such combined stress for soybean (Glycine max) remain to be determined. Here we assessed the physiological responses of soybean plants exposed to hypoxia and a high concentration of iron. Soil-grown plants cultivated in a greenhouse until the vegetative stage were transferred to a hydroponic system containing nutrient solution and subjected to two oxygen conditions (normoxia (6.2 mg L -1 ) and hypoxia (0.33 mg L -1 )) and two iron concentrations (Fe-EDTA) (0.09 and 1.8 mM) for 72 h. During hypoxia, high concentrations of iron in the nutrient solution resulted in increased iron accumulation in roots and leaves. Under this condition, the concentrations of zinc, nitrogen, potassium, and calcium decreased in the roots, while the concentration of nitrogen and magnesium decreased in the leaves. Additionally, during hypoxia, the higher concentration of iron led to an increase in the activity of the antioxidant enzymes in roots and leaves, while decreased the levels of the photosynthetic pigments, leaf gas exchange, and plant growth. In conclusion, high iron concentration in the root medium results in a considerably more severe damage condition to soybean plants under hypoxia compared to plants grown under low iron availability.

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Silicon nutrition mitigates the negative impacts of iron toxicity on rice photosynthesis and grain yield

Cited by 20 publications

References 33 publications

Fe toxicity in plants: Impacts and remediation

Fe toxicity in plants: Impacts and remediation

Below-ground plant-soil interactions affecting adaptations of rice to iron toxicity

Iron toxicity increases oxidative stress and impairs mineral accumulation and leaf gas exchange in soybean plants during hypoxia

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