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7 results for “tolerance to heavy metals”
Non-genetically-based intraspecific differentiation for heavy metal tolerance in the copper moss Scopelophila cataractae
<p>We used next-generation sequencing to study DNA methylation and gene expression changes in plants from four clonal populations of the metallophyte moss <em>Scopelophila cataractae</em> experimentally exposed to either Cd or Cu. For this we performed reduced representation bisulfite DNA sequencing and RNA sequencing. </p>
Figure 2 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 2. Leaves of lettuce under lead and silver nitrate concentrations. A: 0 mg.Kg-1 Pb and Ag; B: 12,5 mg.Kg-1 Ag; C: 25 mg.Kg-1 Ag; D: 37 mg.Kg-1 Ag; E: 90 mg.Kg-1 Pb; F: 180 mg.Kg-1 Pb and G: 270 mg.Kg-1 Pb. Ade: adaxial epidermis;Chp:Chlorophyll parenchyma; Tr:trichome; X: xylem; Abe: abaxial epidermins P: phoema Hy: Hypodermis; VB:vascular bundles; AB: Assesory bundles Bars 50µm.
Figure 1 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 1. Germination and growth characteristics of lettuce plants subjected to increasing lead and Ag concentrations. A) Emergence speed index and emergence mean time; B) Emergence percentage; C) Plant height as a function of lead and silver concentrations; D) Behavior of leaf area in plants subjected to lead; E) SPAD as a function of lead and silver concentrations; F) Weight of dry matter. Each point on the graphs represents an average of 50 repetitions. The standards variations vary between ±2.5 and ±6.8 around the average from the graphs at the different points.
Figure 3 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 3. Roots of lettuce under lead and silver nitrate concentrations. A: 0 mg.Kg-1 Pb and Ag; B: 12,5 mg.Kg-1 Ag; C: 25 mg.Kg-1 Ag; D: 37 mg.Kg-1 Ag; E: 90 mg.Kg-1 Pb; F: 180 mg.Kg-1 Pb and G: 270 mg.Kg-1 Pb. En: endoderm; Ep: epidermis; Ex: exoderm; Co: cortex; Px: protoxylem; Mx: metaxylem. Bars: 50µm.
Soil microbe-induced plant volatiles can alert neighboring plants for tolerating heavy metal stress
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Data from: Adaptive differences in gene expression associated with heavy metal tolerance in the soil arthropod Orchesella cincta
Field-selected tolerance to heavy metals has been reported for Orchesella cincta (Arthropoda: Collembola) populations occurring at metal-contaminated mining sites. This tolerance is correlated with heritable increase of metal excretion efficiency; less pronounced cadmium (Cd) induced growth reduction and, over-expression of the metallothionein gene. We applied transcriptomics to determine differential gene expression caused by this abiotic stress in reference and Cd tolerant populations. Many cDNAs responded to Cd exposure in the reference population. Significantly fewer clones were Cd responsive in tolerant animals. Analysis of variance revealed transcripts that interact between Cd exposure and population. Hierarchical cluster analysis of these clones identified two major groups. The first one contained cDNAs that were up regulated by Cd in the reference culture, but non-responsive or down regulated in tolerant animals. This cluster was also characterized by elevated constitutive expression in the tolerant population. Gene ontology analysis revealed that these cDNAs were involved in structural integrity of the cuticle, anti-microbial defense, calcium-channel blocking, sulfur assimilation and chromatin remodeling. The second group consisted of cDNAs down regulated in reference animals but not responding or slightly up regulated in tolerant animals. Their functions involved carbohydrate metabolic processes, Ca2+ dependent stress signaling, redox state, proteolysis and digestion. The reference population showed a strong signature of stress-induced genome-wide perturbation of gene expression, whereas the tolerant animals maintained normal gene expression upon Cd exposure. We confirmed the micro-evolutionary processes occurring in soil arthropod populations and suggest a major contribution of gene regulation to the evolution of a stress-adapted phenotype.
Data from: Adaptive differences in gene expression associated with heavy metal tolerance in the soil arthropod Orchesella cincta
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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