Paspalum urvillei and Setaria parviflora, two grasses naturally adapted to extreme iron-rich environments

Araújo, Talita Oliveira de; Isaure, Marie‐Pierre; Alchoubassi, Ghaya; Bierła, Katarzyna; Szpunar, Joanna; Trcera, Nicolas; Chay, Sandrine; Alcon, Carine; Silva, Luzimar Campos da; Curie, Catherine; Mari, Stéphane

doi:10.1016/j.plaphy.2020.03.014

Cited by 24 publications

(15 citation statements)

References 69 publications

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“…Most of the N absorbed by grass species is found in leaf mesophyll cells (up to 75%), which are mainly involved in photosynthetic processes [ 26 , 48 ]. The leaf N also affects the size and number of chloroplasts and is found mainly as Rubisco and other thylakoid compounds (chlorophylls) responsible for light absorption and energy transfer [ 22 , 26 , 49 ]. As is consistent with other grass species [ 30 , 40 , 50 ], the patterns of N concentrations in both studied species were followed by most of the measured variables; plants that are able to capture more of the supplied N ( P. cinerascens ) have the benefits of increased carbon fixation and biomass.…”

Section: Discussionmentioning

confidence: 99%

“…In fact, to reduce the metabolic risk associated with excess iron, species that adapt to environments naturally rich in metals can store large quantities of such elements by carrying the elements to the shoot organs (hyperaccumulators) or can prevent the elements from being absorbed in high quantities (excluders). A sophisticated combination of transport and accumulation in structures such as Fe-ferritin complexes is required in the former strategy to prevent the production of chemically reactive species (hydroxyl radicals) through the Fenton reaction [ 66 ], while in the latter mechanism is commonly found the formation of iron plaques around the roots as a consequence of the precipitation of Fe-oxyhydroxide (ferrihydrite), the restriction of iron uptake by apoplastic barriers, and Fe deposits in the root tissues (epidermal and cortical cells) in plants exposed to high iron availability [ 22 , 67 ]. Although in this study we did not evaluate the root anatomical structures, these adaptations are frequently observed in grasses, including the Paspalum genus.…”

Section: Discussionmentioning

confidence: 99%

“…Grass strips can be effective for soil conservation and rehabilitation by reducing runoff, capturing eroded materials, and, together with biomass deposition, reducing nutrient loss and enhancing fertility [ 21 ]. Moreover, the expected high iron tolerances of both species, which have already been reported for both genera [ 22 , 23 ], are of special advantage, as the high iron availability remaining in mining waste substrates is a significant challenge to rehabilitation processes, in addition to the low natural fertility of these substrates [ 13 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Caldeira¹,

Lima²,

Ramos³

et al. 2021

Plants

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Native species may have adaptive traits that are advantageous for overcoming the adverse environmental conditions faced during the early stages of mine land rehabilitation. Here, we examined the nitrogen (N) growth responses of two native perennial grasses (Axonopus longispicus and Paspalum cinerascens) from canga in nutrient-poor iron mining substrates. We carried out vegetative propagation and recovered substantial healthy tillers from field-collected tussocks of both species. These tillers were cultivated in mining substrates at increasing N levels. The tillering rates of both species increased with the N application. Nonetheless, only in P. cinerascens did the N application result in significant biomass increase. Such growth gain was a result of changes in leaf pigment, stomatal morphology, gas exchanges, and nutrients absorption that occurred mainly under the low N additions. Reaching optimum growth at 80 mg N dm−3, these plants showed no differences from those in the field. Our study demonstrates that an input of N as fertilizer can differentially improve the growth of native grasses and that P. cinerascens plants are able to deposit high quantities of carbon and protect soil over the seasons, thus, making them promising candidates for restoring nutrient cycling, accelerating the return of other species and ecosystem services.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Caldeira¹,

Lima²,

Ramos³

et al. 2021

Plants

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show abstract

“…In foxtail millet, it was found that Iso-potentials of PEG (used for drought treatment) and laundry detergent had a more adverse effect on seed germination and overall plant growth than PEG ( Heidari et al, 2019 ). In a recent study, iron plaque (IP) formation was observed in the less studied grass S. parviflora which helps plants adapt to an iron-rich environment ( Oliveira de Araujo et al, 2020 ). Transient expression in tobacco leaves revealed that foxtail millet PPLS1 , a bHLH transcription factor associated with SiMYB85 controlled the purple color of pulvinus and leaf sheath (PPLS) trait used as an indicative characteristic of the authentic hybrids ( Bai et al, 2020 ).…”

Section: Omics Resources In Setariamentioning

confidence: 99%

Multi-omics intervention in Setaria to dissect climate-resilient traits: Progress and prospects

et al. 2022

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Millets constitute a significant proportion of underutilized grasses and are well known for their climate resilience as well as excellent nutritional profiles. Among millets, foxtail millet (Setaria italica) and its wild relative green foxtail (S. viridis) are collectively regarded as models for studying broad-spectrum traits, including abiotic stress tolerance, C4 photosynthesis, biofuel, and nutritional traits. Since the genome sequence release, the crop has seen an exponential increase in omics studies to dissect agronomic, nutritional, biofuel, and climate-resilience traits. These studies have provided first-hand information on the structure, organization, evolution, and expression of several genes; however, knowledge of the precise roles of such genes and their products remains elusive. Several open-access databases have also been instituted to enable advanced scientific research on these important crops. In this context, the current review enumerates the contemporary trend of research on understanding the climate resilience and other essential traits in Setaria, the knowledge gap, and how the information could be translated for the crop improvement of related millets, biofuel crops, and cereals. Also, the review provides a roadmap for studying other underutilized crop species using Setaria as a model.

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“…Our seeds were collected from a grassland dominated by A. capillaris that is regularly flooded, which suggests that this species and, in particular, this genotype could potentially be adapted to such conditions. Furthermore, other species of the family Poaceae have also been shown to develop iron plaque, such as Paspalum urvillei and Setaria parviflora, which grow in sand with excesses of iron and developed layers of Fe oxyhydroxide (ferrihydrite) in the cell walls and vacuoles, which were detected only by synchrotron µXANES analysis [54]. The evidence suggests that one of the mechanisms of A. capillaris to cope with nZVI could be the formation of iron plaque, however, further investigation is necessary to evaluate this concept.…”

Section: Physiological Parametersmentioning

confidence: 99%

Nanoscale Zero-Valent Iron Has Minimum Toxicological Risk on the Germination and Early Growth of Two Grass Species with Potential for Phytostabilization

et al. 2020

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Two Poaceae species, Agrostis capillaris and Festuca rubra, were selected for their potential as phytostabilizing plants in multicontaminated soils. These species are resistant to contamination and maintain high concentrations of contaminants at the root level. Nanoscale zero-valent iron (nZVI) is an engineered nanomaterial with the ability to stabilize metal(loid)s in soils; its potential toxicological effects in the selected species were studied in a germination test using: (i) control variant without soil; (ii) soil contaminated with Pb and Zn; and (iii) contaminated soil amended with 1% nZVI, as well as in an hydroponic experiment with the addition of nZVI 0, 25, 50 and 100 mg L−1. nZVI had no negative effects on seed germination or seedling growth, but was associated with an increase in shoot growth and reduction of the elongation inhibition rate (root-dependent) of F. rubra seedlings. However, applications of nZVI in the hydroponic solution had no effects on F. rubra but A. capillaris developed longer roots and more biomass. Increasing nZVI concentrations in the growing solution increased Mg and Fe uptake and reduced the Fe translocation factor. Our results indicate that nZVI has few toxic effects on the studied species.

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Paspalum urvillei and Setaria parviflora, two grasses naturally adapted to extreme iron-rich environments

Cited by 24 publications

References 69 publications

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Multi-omics intervention in Setaria to dissect climate-resilient traits: Progress and prospects

Nanoscale Zero-Valent Iron Has Minimum Toxicological Risk on the Germination and Early Growth of Two Grass Species with Potential for Phytostabilization

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