How does drought affect native grasses’ photosynthesis on the revegetation of iron ore tailings?

Rios, Camilla Oliveira; Siqueira-Silva, Advanio Inácio; Pereira, Eduardo Gusmão

doi:10.1007/s11356-020-11599-x

Cited by 18 publications

(5 citation statements)

References 71 publications

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“…The high concentration of Zn in tailings may also contribute to the decrease in chlorophyll, and although Zn is an essential cofactor for enzymes involved in carbohydrate metabolism and other physiological processes [ 45 ], Zn is detrimental at high levels because Zn can displace the Mg cofactor in chlorophyll, thereby disrupting photosynthesis, limiting growth, and causing plants to fade to green [ 26 ]. For gas exchange parameters, it has been shown that the significant decrease in the net photosynthetic rate of plants under heavy metal stress is related to stomatal restriction [ 46 , 47 , 48 ]. We found that Atriplex centralasiatic and Chenopodium glaucum showed a significant decrease in Pn along with a decrease in Gs and E after treatment, and, under heavy metal stress, Ci values also showed significant decreases; these results suggest that the heavy metal stress-induced Pn reduction in Atriplex centralasiatic and Chenopodium glaucum may be related to stomatal restriction, and the results of Saradadevi et al in their study on wheat support this speculation [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

Gao

Wang

et al. 2022

IJERPH

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The physiological mechanisms and phytoremediation effects of three kinds of native quinoa in a desert mining area were studied. We used two different types of local soils (native soil and tailing soil) to analyze the changes in the heavy metal content, leaf physiology, photosynthetic parameters, stem hydraulics, and anatomical characteristics of potted quinoa. The results show that the chlorophyll content, photosynthetic rate, stomatal conductance, and transpiration rate of Kochia scoparia were decreased, but intercellular CO2 concentration (Ci) was increased under heavy metal stress, and the net photosynthetic rate (Pn) was decreased due to non-stomatal limitation. The gas exchange of Chenopodium glaucum and Atriplex centralasiatica showed a decrease in Pn, stomatal conductance (Gs), and transpiration rate (E) due to stomatal limitation. The three species showed a similar change in heavy metal content; they all showed elevated hydraulic parameters, decreased vessel density, and significantly thickened vessel walls under heavy metal stress. Physiological indicators such as proline content and activity of superoxide dismutase (SOD) and peroxidase (POD) increased, but the content of malondialdehyde (MDA) and glutathione (GSH), as well as catalase (CAT) activity, decreased in these three plants. Therefore, it can be concluded that these three species of quinoa, possibly the most dominant 30 desert plants in the region, showed a good adaptability and accumulation capacity under the pressure of heavy metal stress, and these plants can be good candidates for tailings remediation in the Jinchang desert mining area.

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Section: Discussionmentioning

confidence: 99%

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

Gao

Wang

et al. 2022

IJERPH

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“…It is well established that drought stress influences photosynthesis by closing stomata ( Verma et al, 2020 ; Rios et al, 2021 ). Our GO enrichment analysis found more DEGs enriched in carbohydrate metabolism in the drought-stressed diploids, however, there were more DEGs enriched in photosynthesis and light harvesting in the tetraploids under drought stress ( Figure 4 ), implying that one of the important reasons for tetraploid adaptation to drought stress might be through the regulation of photosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Tetraploidy in Citrus wilsonii Enhances Drought Tolerance via Synergistic Regulation of Photosynthesis, Phosphorylation, and Hormonal Changes

Jiang

Yang

et al. 2022

Front. Plant Sci.

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Polyploidy varieties have been reported to exhibit higher stress tolerance relative to their diploid relatives, however, the underlying molecular and physiological mechanisms remain poorly understood. In this study, a batch of autotetraploid Citrus wilsonii were identified from a natural seedling population, and these tetraploid seedlings exhibited greater tolerance to drought stress than their diploids siblings. A global transcriptome analysis revealed that a large number of genes involved in photosynthesis response were enriched in tetraploids under drought stress, which was consistent with the changes in photosynthetic indices including Pn, gs, Tr, Ci, and chlorophyll contents. Compared with diploids, phosphorylation was also modified in the tetraploids after drought stress, as detected through tandem mass tag (TMT)-labeled proteomics. Additionally, tetraploids prioritized the regulation of plant hormone signal transduction at the transcriptional level after drought stress, which was also demonstrated by increased levels of IAA, ABA, and SA and reduced levels of GA3 and JA. Collectively, our results confirmed that the synergistic regulation of photosynthesis response, phosphorylation modification and plant hormone signaling resulted in drought tolerance of autotetraploid C. wilsonii germplasm.

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“…In areas degraded by iron mining, natural regeneration is slow and often impossible (Silva et al, 2006) due to the physical and chemical characteristics of the substrate (González-Alcaraz and van Gestel 2017), such as poor physical structure (Silva et al, 2006), alkaline pH (Wu et al, 20206), low water retention capacity, nutrient (N, P) de ciency , and high metal stress (López-Orenes et al, 2017; Wang et al, 2017). In addition, in degraded iron ore areas with the characteristic of low nutrient concentration and high density of the substrate, arti cial vegetation restoration is a huge challenge (Rios et al, 2021;Wang et al, 2017). In recent years, the recovery of iron-ore mined areas can be achieved through a variety of hard engineering techniques, and phytoremediation has been considered to be a more e cient, economical, and environmentally sustainable remediation strategy compared to physical and chemical methods (Wang et al, 2017;Skirycz et al, 2014), as it could preserve the soil resource, improve soil structure, physico-and bio-chemical properties, biodiversity patterns, ecosystem functioning (Gastauer et al, 2019), soil microbial diversity (Touceda-Gonzalez et al, 2017; Xue et al, 2015), ultimately creating self-sustaining vegetation communities.…”

Section: Introductionmentioning

confidence: 99%

Characterization of ECM fungal community under three different vegetation restorations in iron tailing

Zhu

Ding

Zhu

et al. 2022

Preprint

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Vegetation restoration is an effective method to improve the ecological environment of mine tailings, which has a profound impact on the potential ecological functions of soil fungal communities, yet little is known about its beneficial effect on soil ectomycorrhizal fungal community. In this study, the responses of soil characteristics and soil ectomycorrhizal fungal community diversity and structure to different revegetation, as well as the contribution of soil factors to soil ectomycorrhizal community were investigated in Liaoning Province, China. As we anticipated, the vegetation restoration significantly improved soil nutrients. What’s more, compared to PKSZ and PSC, RPL could better improve soil TC, TN, TP, and AP. In addition, soil ectomycorrhizal community diversity in RPL was greater than PKSZ and PSC. NMDS analyses indicated that soil ectomycorrhizal community significantly differed depending on different revegetation types. Thus, these results indicated that RPL could be a suitable species for the revegetation of iron mine tailings. The experiment provided theoretical basis for evidence for ecological restoration of iron mine tailings using local plant species.

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How does drought affect native grasses’ photosynthesis on the revegetation of iron ore tailings?

Cited by 18 publications

References 71 publications

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

Tetraploidy in Citrus wilsonii Enhances Drought Tolerance via Synergistic Regulation of Photosynthesis, Phosphorylation, and Hormonal Changes

Characterization of ECM fungal community under three different vegetation restorations in iron tailing

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