scholarly journals GENETIC AND EPIGENETIC MECHANISMS OF PLANT ADAPTATION (ON THE EXAMPLE OF THE MODEL SPECIES ARABIDOPSIS THALIANA)

2021 ◽  
pp. 5
Author(s):  
Ольга Михайловна Федоренко ◽  
Марина Витальевна Зарецкая ◽  
Ольга Николаевна Лебедева ◽  
Olga Fedorenko ◽  
Marina Zaretskaya ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Epigenetic Mechanisms ◽  
Model Species ◽  
Plant Adaptation

scholarly journals Arabidopsis thaliana as a model species for xylem hydraulics: does size matter?

2013 ◽  
Vol 64 (8) ◽  
pp. 2295-2305 ◽  
Author(s):  
Aude Tixier ◽  
Hervé Cochard ◽  
Eric Badel ◽  
Anaïs Dusotoit-Coucaud ◽  
Steven Jansen ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Model Species ◽  
Size Matter

scholarly journals Assessing the use of reflectance spectroscopy in determining CsCl stress in the model species Arabidopsis thaliana

2015 ◽  
Vol 36 (23) ◽  
pp. 5887-5915 ◽  
Author(s):  
N.E. Martinez ◽  
J.L. Sharp ◽  
W.W. Kuhne ◽  
T.E. Johnson ◽  
C.T. Stafford ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Reflectance Spectroscopy ◽  
Model Species

scholarly journals Molecular mechanisms mediating root hydrotropism: what we have observed since the rediscovery of hydrotropism

2019 ◽  
Vol 133 (1) ◽  
pp. 3-14
Author(s):  
Yutaka Miyazawa ◽  
Hideyuki Takahashi
Keyword(s):  
Arabidopsis Thaliana ◽  
Water Potential ◽  
Water Availability ◽  
Molecular Mechanisms ◽  
Current Knowledge ◽  
Potential Gradient ◽  
Regulatory Mechanisms ◽  
Directional Growth ◽  
Plant Adaptation ◽  
Water Potential Gradient

AbstractRoots display directional growth toward moisture in response to a water potential gradient. Root hydrotropism is thought to facilitate plant adaptation to continuously changing water availability. Hydrotropism has not been as extensively studied as gravitropism. However, comparisons of hydrotropic and gravitropic responses identified mechanisms that are unique to hydrotropism. Regulatory mechanisms underlying the hydrotropic response appear to differ among different species. We recently performed molecular and genetic analyses of root hydrotropism in Arabidopsis thaliana. In this review, we summarize the current knowledge of specific mechanisms mediating root hydrotropism in several plant species.

scholarly journals Arabidopsis thaliana zinc accumulation in leaf trichomes is correlated with zinc concentration in leaves

2020 ◽  
Author(s):  
Felipe K. Ricachenevsky ◽  
Tracy Punshon ◽  
David E. Salt ◽  
Janette P. Fett ◽  
Mary Lou Guerinot
Keyword(s):  
Arabidopsis Thaliana ◽  
Spatial Distribution ◽  
Growth And Yield ◽  
Zn Deficiency ◽  
Model Species ◽  
Nutritional Disorder ◽  
Leaf Trichomes ◽  
Zn Accumulation ◽  
Zn Homeostasis ◽  
Zn Status

AbstractZinc (Zn) is a key micronutrient. In humans, Zn deficiency is a common nutritional disorder, and most people acquire dietary Zn from eating plants. In plants, Zn deficiency can decrease plant growth and yield. Understanding Zn homeostasis in plants can improve agriculture and human health. While root Zn transporters in plat model species have been characterized in detail, comparatively little is known about shoot processes controlling Zn concentrations and spatial distribution. Previous work showed that Zn hyperaccumulator species such as Arabidopsis halleri accumulate Zn and other metals in leaf trichomes. The model species Arabidopsis thaliana is a non-accumulating plant, and to date there is no systematic study regarding Zn accumulation in A. thaliana trichomes. Here, we used Synchrotron X-Ray Fluorescence mapping to show that Zn accumulates at the base of trichomes of A. thaliana, as had seen previously for hyperaccumulators. Using transgenic and natural accessions of A. thaliana that vary in bulk leaf Zn concentration, we demonstrated that higher leaf Zn increases total Zn found at the base of trichome cells. Furthermore, our data suggests that Zn accumulates in the trichome apoplast, likely associated with the cell wall. Our data indicates that Zn accumulation in trichomes is a function of the Zn status of the plant, and provides the basis for future studies on a genetically tractable plant species aiming at understanding the molecular steps involved in Zn spatial distribution in leaves.

scholarly journals Pars Pro Toto: Every Single Cell Matters

2021 ◽  
Vol 12 ◽  
Author(s):  
Fien Christiaens ◽  
Balkan Canher ◽  
Fien Lanssens ◽  
Anchal Bisht ◽  
Simon Stael ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Single Cell ◽  
Tree Species ◽  
Repair Process ◽  
Model Species ◽  
Modus Operandi ◽  
Different Types ◽  
Agricultural Applications ◽  
Regeneration Response ◽  
Self Repair

Compared to other species, plants stand out by their unparalleled self-repair capacities. Being the loss of a single cell or an entire tissue, most plant species are able to efficiently repair the inflicted damage. Although this self-repair process is commonly referred to as “regeneration,” depending on the type of damage and organ being affected, subtle to dramatic differences in the modus operandi can be observed. Recent publications have focused on these different types of tissue damage and their associated response in initiating the regeneration process. Here, we review the regeneration response following loss of a single cell to a complete organ, emphasizing key molecular players and hormonal cues involved in the model species Arabidopsis thaliana. In addition, we highlight the agricultural applications and techniques that make use of these regenerative responses in different crop and tree species.

scholarly journals Host_microbe_PPI - R package to analyse intra-species and inter-species protein-protein interactions in the model plant Arabidopsis thaliana

2019 ◽  
Author(s):  
Thomas Nussbaumer
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Interactions ◽  
Host Plants ◽  
Gene Loss ◽  
R Package ◽  
Protein Protein Interactions ◽  
Model Species ◽  
R Shiny ◽  
Model Plant Arabidopsis Thaliana ◽  
Plant Arabidopsis Thaliana

AbstractIntra-species protein-protein interactions (PPI) provide valuable information about the systemic response of a model species when facing either abiotic and biotic stress conditions. Inter-species PPI can otherwise offer insights into how microbes interact with its host and can provide clues how early infection mechanism takes place. To understand these processes in a more comprehensive way and to compare it with experimental outcomes from omics studies, we require additional methods to analyse and visualize PPI data. We demonstrate the user-interface host_microbe_PPI that is implemented in R Shiny. It allows for interactively analysing inter-species and intra-species datasets from various published Arabidopsis thaliana datasets. It enables among other features comparisons of the centrality measurements (degree, betweenness and closeness) and analysis the existence of orthologous proteins in closely related genomes, e.g. when gene loss in host and non-host plants is compared. Arabidopsis was used even so the tool can be also applied in other host-microbe systems.

scholarly journals Polyploidy-associated paramutation in Arabidopsis is determined by small RNAs, temperature, and allele structure

PLoS Genetics ◽  
2021 ◽  
Vol 17 (3) ◽  
pp. e1009444
Author(s):  
Heinrich Bente ◽  
Andrea M. Foerster ◽  
Nicole Lettner ◽  
Ortrun Mittelsten Scheid
Keyword(s):  
Arabidopsis Thaliana ◽  
Small Rna ◽  
Small Rnas ◽  
Underlying Mechanism ◽  
Mendelian Inheritance ◽  
Epigenetic Mechanisms ◽  
Epigenetic Changes ◽  
F2 Population ◽  
Different Types ◽  
Allelic Interaction

Paramutation is a form of non-Mendelian inheritance in which the expression of a paramutable allele changes when it encounters a paramutagenic allele. This change in expression of the paramutable alleles is stably inherited even after segregation of both alleles. While the discovery of paramutation and studies of its underlying mechanism were made with alleles that change plant pigmentation, paramutation-like phenomena are known to modulate the expression of other traits and in other eukaryotes, and many cases have probably gone undetected. It is likely that epigenetic mechanisms are responsible for the phenomenon, as paramutation forms epialleles, genes with identical sequences but different expression states. This could account for the intergenerational inheritance of the paramutated allele, providing profound evidence that triggered epigenetic changes can be maintained over generations. Here, we use a case of paramutation that affects a transgenic selection reporter gene in tetraploid Arabidopsis thaliana. Our data suggest that different types of small RNA are derived from paramutable and paramutagenic epialleles. In addition, deletion of a repeat within the epiallele changes its paramutability. Further, the temperature during the growth of the epiallelic hybrids determines the degree and timing of the allelic interaction. The data further make it plausible why paramutation in this system becomes evident only in the segregating F2 population of tetraploid plants containing both epialleles. In summary, the results support a model for polyploidy-associated paramutation, with similarities as well as distinctions from other cases of paramutation.

scholarly journals A rainfall-manipulation experiment with 517 Arabidopsis thaliana accessions

2017 ◽  
Author(s):  
Moises Exposito-Alonso ◽  
Rocío Gámez Rodríguez ◽  
Cristina Barragán ◽  
Giovanna Capovilla ◽  
Eunyoung Chae ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Natural Populations ◽  
Common Garden ◽  
Species Traits ◽  
Large Field ◽  
Model Species ◽  
Evolutionary Genetic ◽  
In The Wild ◽  
Genetic Level ◽  
Manipulation Experiment

The gold standard for studying natural selection and adaptation in the wild is to quantify lifetime fitness of individuals from natural populations that have been grown together in a common garden, or that have been reciprocally transplanted. By combining fitness values with species traits and genome sequences, one can infer selection coefficients at the genetic level. Here we present a rainfall-manipulation experiment with 517 whole-genome sequenced natural accessions of the plant Arabidopsis thaliana spanning the global distribution of the species. The experiments were conducted in two field stations in contrasting climates, in the Mediterranean and in Central Europe, where we built rainout shelters and simulated high and low rainfall. Using custom image analysis we quantified fitness- and phenology-related traits for 23,154 pots, which contained about 14,500 plants growing independently, and over 310,000 plants growing in small populations (max. 30 plants). This large field experiment dataset, which associates fitness and ecologically-relevant traits with genomes, will provide an important resource to test eco-evolutionary genetic theories and to understand the potential evolutionary impacts of future climates on an important plant model species.

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