Zonal responses of sensitive vs. tolerant wheat roots during Al exposure and recovery

Silva, Sónia; Rodriguez, Eleazar; Pinto-Carnide, Olinda; Martins-Lopes, Paula; Matos, Manuela; Guedes-Pinto, Henrique; Santos, Conceição

doi:10.1016/j.jplph.2012.01.011

Cited by 14 publications

(6 citation statements)

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“…These results are in line with other findings where Z. fabago plants exposed to Zn or Cd showed maintenance of RWC (Lefèvre et al, 2014(Lefèvre et al, , 2016. Contrarily, species sensitive to metals as Pb (Parys et al, 1998) or Al (Silva et al, 2012) showed high disturbance of RWC.…”

Section: Discussionsupporting

confidence: 92%

“…While O 2 − levels increased in shoots and decreased in roots upon Pb treatment, H 2 O 2 contents decreased in shoots and increased in roots, which may be supported by differences in the expression of antioxidant systems in these organs, as already reported for other metal-stressed species (Silva et al, 2012). For example, the increased levels of H 2 O 2 in roots may be due to a better activity of enzymes (e.g., SOD) converting O 2− into H 2 O 2 .…”

Section: Aq3supporting

confidence: 80%

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Expression patterns of antioxidant network in pioneer plants from mine tailings polluted with high levels of heavy metals

Orenes¹

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CHAPTER 2: Seasonal changes in antioxidative/oxidative profile of mining and non-mining populations of Syrian beancaper as determined by soil conditions 2.1. Abstract 2.2. Introduction 2.3. Material and Methods 2.3.1. Plant sampling and soil analysis 2.3.2. Plant performance measurements 2.3.3. Measurement of the total antioxidant capacity 2.3.4. Quantification of ascorbate, glutathione, soluble non-protein thiols, proline and alkaloids 2.3.5. Determination of protein oxidation, lipid peroxidation, hydrogen peroxide and superoxide radical 2.3.6. Quantification of total phenolics, flavanols, lignin, flavonoids, hydroxycinnamic acids, and cell wall-associated-proanthocyanidins 2.3.7. Enzymatic assays 2.3.8. Extraction and quantification of free and conjugated SA 2.3.9. Statistical analysis 2.4. Results 2.4.1. Rhizosphere soil characteristics 2.4.2. Multivariate analysis of physiological and antioxidative/oxidative data 2.5. Discussion 2.6. Conclusions CHAPTER 3: Coordinated role of soluble and cell wall bound phenols is a key feature of the metabolic adjustment in a mining woody fleabane (Dittrichia viscosa L.) population under semi-arid conditions 3.1.

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Section: Discussionsupporting

confidence: 92%

Section: Aq3supporting

confidence: 80%

Expression patterns of antioxidant network in pioneer plants from mine tailings polluted with high levels of heavy metals

Orenes¹

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“…Pb is described as being able to impair germination and plant growth [122], even under low concentrations [123], decrease the net photosynthetic rate and effective PSII photosynthetic efficiency [124], impair the Calvin cycle [125], and induce DNA damage [126][127][128] and antioxidant response due to redox homeostasis loss [128,129]. Al, which represents 7% of the soil matter of the Earth's crust, can severely impair crop development and yield in acidic environments [130,131], can change root ultrastructure and development [132][133][134][135], induce nutrient imbalances by limiting the availability of minerals such as Mg, Ca, and K [136][137][138], negatively affect photochemical and non-photochemical phases of photosynthesis [139][140][141], and can increase ROS production [142][143][144][145]. Arsenic (As) is a persisting metalloid in the environment and promotes ROS production and oxidative damage [146], including cell membrane and DNA damages, and alters photosynthesis and nutrient supply [147].…”

Section: Environmental Contaminantsmentioning

confidence: 99%

Titanium and Zinc Based Nanomaterials in Agriculture: A Promising Approach to Deal with (A)biotic Stresses?

Silva

Dias

2022

Toxics

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Abiotic stresses, such as those induced by climatic factors or contaminants, and biotic stresses prompted by phytopathogens and pests inflict tremendous losses in agriculture and are major threats to worldwide food security. In addition, climate changes will exacerbate these factors as well as their negative impact on crops. Drought, salinity, heavy metals, pesticides, and drugs are major environmental problems that need deep attention, and effective and sustainable strategies to mitigate their effects on the environment need to be developed. Besides, sustainable solutions for agrocontrol must be developed as alternatives to conventional agrochemicals. In this sense, nanotechnology offers promising solutions to mitigate environmental stress effects on plants, increasing plant tolerance to the stressor, for the remediation of environmental contaminants, and to protect plants against pathogens. In this review, nano-sized TiO2 (nTiO2) and ZnO (nZnO) are scrutinized, and their potential to ameliorate drought, salinity, and xenobiotics effects in plants are emphasized, in addition to their antimicrobial potential for plant disease management. Understanding the level of stress alleviation in plants by these nanomaterials (NM) and relating them with the application conditions/methods is imperative to define the most sustainable and effective approaches to be adopted. Although broad-spectrum reviews exist, this article provides focused information on nTiO2 and nZnO for improving our understanding of the ameliorative potential that these NM show, addressing the gaps in the literature.

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“…Root growth inhibition is recognized as one of the most typical symptoms of Al toxicity, which may resulted from inhibition of cell division and expansion, disruption of plasma membrane integrity ( Silva et al, 2012 ; Liu et al, 2018 ). Therefore, Al-induced root growth inhibition is frequently used as an indicator of the Al tolerance of many plants, including wheat ( Triticum aestivum L.) ( Sun et al, 2020 ), Arabidopsis ( Arabidopsis thaliana ) ( Lou et al, 2019 ), rice ( Oryza sativa ) ( Zhu et al, 2017 , 2019b ), pea ( Pisum sativum L.) ( Li et al, 2016 ), trifoliate orange [ Poncirus trifoliata (L.) Raf.]…”

Section: Discussionmentioning

confidence: 99%

Aluminum-Induced Alterations to the Cell Wall and Antioxidant Enzymes Involved in the Regulation of the Aluminum Tolerance of Chinese Fir (Cunninghamia lanceolata)

et al. 2022

Front. Plant Sci.

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Chinese fir (Cunninghamia lanceolata), which is an important coniferous tree species in China, is mainly planted in acidic soils with toxic aluminum (Al) levels. However, the consequences of Al toxicity and its resistance mechanism in Chinese fir remain largely uncharacterized. In this study, the Al-induced modification and possible role of cell wall in regulating Al tolerance in Chinese fir were investigated by using seedlings with contrasting Al tolerance, namely, Al-sensitive (YX02) and Al-resistant (YX01) genotypes. The results in present work showed that Al treatment resulted in a dose- and time-dependent inhibition of root growth and oxidative damage in both genotypes, but more in YX02 than in YX01. The severe oxidative damage observed in YX02 under Al stress was found to correlate with lower antioxidant enzyme activities as compared with YX01. The greater root growth inhibition observed in YX02 compared with YX01 was associated with a higher accumulation of Al in pectin and hemicllulose 1 (HC1) fraction because of the higher pectin and HC1 contents and the lower degree of pectin demethylation due to enhanced pectin methylesterase activity in YX02, which ultimately enhanced cell wall binding capacity for Al in YX02. Taken together, our results suggested that enhancement of antioxidant enzyme activities and cell wall modification-induced Al exclusion are the two mechanisms responsible for the Al tolerance of Chinese fir.

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Zonal responses of sensitive vs. tolerant wheat roots during Al exposure and recovery

Cited by 14 publications

References 64 publications

Expression patterns of antioxidant network in pioneer plants from mine tailings polluted with high levels of heavy metals

Expression patterns of antioxidant network in pioneer plants from mine tailings polluted with high levels of heavy metals

Titanium and Zinc Based Nanomaterials in Agriculture: A Promising Approach to Deal with (A)biotic Stresses?

Aluminum-Induced Alterations to the Cell Wall and Antioxidant Enzymes Involved in the Regulation of the Aluminum Tolerance of Chinese Fir (Cunninghamia lanceolata)

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