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Llugany, Mercè; Lombini, Alessandra; Poschenrieder, Charlotte; Dinelli, Enrico; Barceló, Juan Antonio

doi:10.1023/a:1022990525632

Cited by 53 publications

(6 citation statements)

References 34 publications

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“…Presumably, these are procortex cells that differentiate into a new root apex. Creation of inappropriate root branching as a consequence of damage to the apical meristem were found by Clarkson (1969) and Llugany et al (2003). We suggest that the formation of the new root apexes could be an element of plant defence mechanisms allowing for plant regeneration even after death of the primary roots.…”

Section: Biochemical Analysissupporting

confidence: 61%

Significance of selenium supplementation in root- shoot reactions under manganese stress in wheat seedlings – biochemical and cytological studies

Sieprawska

Skórka

Bednarska-Kozakiewicz

et al. 2021

Plant Soil

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Purpose Agronomic practices are one of the reasons for the increasing accumulation of elements in the soil, including manganese (Mn). Our previous studies have shown that selenium (Se) ions can reduce the toxic actions of metal stress. Those, we studied the effects of Mn—treated as a stressor and Se – as a potential defense in plants. Methods Mn ions (10 mM) or/and Se (15 μM) were added into hydroponic nutrients of two wheat cultivares. The evaluation of the stress-generating and protective actions were analyzed by biochemical methods and microscopic observations in leaves and roots. Moreover the level of DNA methylation for these tissues was determined. Results Mn application caused an increase of lipid peroxidation and hydrogen peroxide content in both leaves and roots and was accompanied with a greater absorption of this element by the roots. For other elements (K, Fe, S, P), with the exception of Ca, the reduced their uptake was registered, especially in roots. For roots, Mn stimulated greater, microscopically observed, desorganization in cell structure as compared to leaves, which was accompanied by a quantitative increase in 5-methylcytosine (5-metC) in root meristem. Se application diminished the effects of Mn-stress. Conclusions These studies is the first in which indicated that global 5-metC level in roots enhancing from dividing meristematic cells to elongating cells of the axial cylinder and cortex. It was suggested that the rise in Ca level can lead to modification of root cells differentiations what may be one of the steps in defense mechanisms.

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Section: Biochemical Analysissupporting

confidence: 61%

Significance of selenium supplementation in root- shoot reactions under manganese stress in wheat seedlings – biochemical and cytological studies

Sieprawska

Skórka

Bednarska-Kozakiewicz

et al. 2021

Plant Soil

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“…This suggests that the apical roots gave rise to an extensive production of lateral roots as a response signal to Al stress. Llugany et al (2003) showed that plants of Silene armeria responded rapidly by producing many lateral roots following Cu stress to the root tip meristem. They suggested such responses may prevent the extension of the major root into soil patches with high ion toxicity and favour the extension of lateral roots into the less toxic topsoil.…”

Section: Discussionmentioning

confidence: 99%

Mitigating Effects of Beta-Carotene on Hydroponic Growth and Productivity of Amaranthus Hybridus L. under Aluminium Toxicity Induced Stress

Egedigwe

Udengwu

2021

Preprint

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Aluminium (Al) toxicity is one of the major sources of environmental stress that limit plant growth and productivity in many acidic soils, especially in the tropics and sub-tropics. Al toxicity subsequently leads to food insecurity in developing countries, especially in sub-Saharan Africa. Though plants can synthesize their antioxidants; the need exists to investigate whether under Al toxicity-induced stress; beta-carotene (β-Carotene) supplementation could ameliorate the stress situation and enhance growth and productivity. A 3× 10− 2 mM aluminium chloride (AlCl3) at pH 4.6 was used to stress plants. β-Carotene was extracted from carrots and high-performance liquid chromatography (HPLC) was used to determine its peak absorbance at 295 nm. β-Carotene's activity was determined using the thiobarbituric acid method. The effects of 50 and 200 µM concentrations of β-Carotene on the hydroponic growth of Amaranthus hybridus, subjected to Al stress, were evaluated in this study. Pre- and post- β-Carotene treatments were applied to A. hybridus seedlings before and after Al treatment for 72 h. Results showed that post- β-Carotene treatments significantly ameliorated plants from Al stress when compared to pre- β-Carotene treatments. Higher doses of β-Carotene significantly increased leaf number, plant height, length and number of inflorescence, fresh and dry weights of shoot, root and inflorescence but significantly decreased root length. The present study suggests that plants of A. hybridus were susceptible to Al toxicity-induced stress and post-β-Carotene supplementation could significantly ameliorate the stress situation and enhance growth and productivity. However, intrinsic antioxidants could be adequate for plants not subjected to stress.

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“…That function, PcoD, encodes an internal membrane protein pump that works in copper translocation and is required for copper resistance (Rensing & Grass, 2003;Solioz, 2019). Copper is one of several heavy metals prevalent in serpentine soils that both microbes and plants need to evolve tolerance of to thrive (Fernandez et al, 1999;Llugany et al, 2003). The sourcing of this function highlights the importance of native plants for sustaining microbial functionality in grassland ecosystems given their evolution with local microbes.…”

Section: Invasives Drive Community Assembly Dynamics During Competitionmentioning

confidence: 99%

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

Ettinger

LaForgia

2023

Preprint

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Interactions between species invasions and climate change have the potential to drive changes in plant communities more than either factor alone. One pathway through which these effects can occur is via changes to the rhizosphere microbial community. Invasive plants can alter the taxonomic and functional makeup of these microbial communities, which may affect natives' abilities to compete with invaders. At the same time, climate change is leading to more frequent extreme wet and dry events, shifting the composition of microbial taxa available in the soil. Understanding the response of plant communities to these combined global change drivers requires a comprehensive approach that assesses the relationship between plant competition and belowground rhizosphere microbial community responses. Here we use a field experiment in a California grassland with a set of six native annual forbs (i.e., wildflowers) and three invasive annual grasses to test how competition with invasive plants alters both identity and function in the native rhizosphere microbiome, and whether competition between these groups interacts with rainfall to amplify or ameliorate these microbial shifts. Metagenomics of rhizosphere communities revealed that drought combined with competition from invaders altered a higher number of functions and families in the native rhizosphere compared to invasive competition alone or drought alone. This suggests invasion-driven shifts in the microbial community may be involved in weakening natives' ability to cope with climate change, especially drought. Understanding the role of the microbial community under invasion and climate change may be critical to mitigating the negative effects of these interacting global change drivers on native communities.

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Cited by 53 publications

References 34 publications

Significance of selenium supplementation in root- shoot reactions under manganese stress in wheat seedlings – biochemical and cytological studies

Significance of selenium supplementation in root- shoot reactions under manganese stress in wheat seedlings – biochemical and cytological studies

Mitigating Effects of Beta-Carotene on Hydroponic Growth and Productivity of Amaranthus Hybridus L. under Aluminium Toxicity Induced Stress

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

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