Wyniki wyszukiwania dla: Detlef Weigel

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The genetic and physiological basis of Arabidopsis thaliana tolerance to Pseudomonas viridiflava

Alejandra Duque‐Jaramillo, Nina Ulmer, Saleh Alseekh, Ilja Bezrukov, więcej

New Phytologist > 240 > 5 > 1961 - 1975

The opportunistic pathogen Pseudomonas viridiflava colonizes > 50 agricultural crop species and is the most common Pseudomonas in the phyllosphere of European Arabidopsis thaliana populations. Belonging to the P. syringae complex, it is genetically and phenotypically distinct from well‐characterized P. syringae sensu stricto. Despite its prevalence, we lack knowledge of how A. thaliana responds...

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The genetic architecture and population genomic signatures of glyphosate resistance in Amaranthus tuberculatus

Julia M. Kreiner, Patrick J. Tranel, Detlef Weigel, John R. Stinchcombe, więcej

Molecular Ecology > 30 > 21 > 5373 - 5389

Much of what we know about the genetic basis of herbicide resistance has come from detailed investigations of monogenic adaptation at known target‐sites, despite the increasingly recognized importance of polygenic resistance. Little work has been done to characterize the broader genomic basis of herbicide resistance, including the number and distribution of genes involved, their effect sizes, allele...

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Population structure and evolution of resistance to acetolactate synthase (ALS)‐inhibitors in Amaranthus tuberculatus in Italy

Andrea Milani, Ulrich Lutz, Giulio Galla, Laura Scarabel, więcej

Pest Management Science > 77 > 6 > 2971 - 2980

BACKGROUND Before 2010, Amaranthus tuberculatus (Moq.) J. D. Sauer was barely known to farmers and stakeholders in Italy. Since then, several populations resistant to acetolactate synthase (ALS)‐inhibiting herbicides have been collected. In most populations, a known target site resistance‐endowing mutation was found, a Trp to Leu substitution at position 574 of the ALS gene, but it was unclear whether...

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Male‐specific Y‐chromosomal regions in waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri)

Jacob S. Montgomery, Darci A. Giacomini, Detlef Weigel, Patrick J. Tranel

New Phytologist > 229 > 6 > 3522 - 3533

Amaranthus tuberculatus and Amaranthus palmeri are agronomically important weed species, both with stable dioecious reproductive systems. An understanding of the genetic basis of sex determination may lead to new methods of managing these troublesome weeds. Previous research identified genomic sequences associated with maleness in each species. Male‐specific sequences were used to identify genomic...

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The Earth BioGenome project: opportunities and challenges for plant genomics and conservation

Moises Exposito‐Alonso, Hajk‐Georg Drost, Hernán A. Burbano, Detlef Weigel

The Plant Journal > 102 > 2 > 222 - 229

Sequencing them all. That is the ambitious goal of the recently launched Earth BioGenome project (Proceedings of the National Academy of Sciences of the United States of America, 115, 4325–4333), which aims to produce reference genomes for all eukaryotic species within the next decade. In this perspective, we discuss the opportunities of this project with a plant focus, but highlight also potential...

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Comparing Arabidopsis receptor kinase and receptor protein‐mediated immune signaling reveals BIK1‐dependent differences

Wei‐Lin Wan, Lisha Zhang, Rory Pruitt, Maricris Zaidem, więcej

New Phytologist > 221 > 4 > 2080 - 2095

Pattern recognition receptors (PRRs) sense microbial patterns and activate innate immunity against attempted microbial invasions. The leucine‐rich repeat receptor kinases (LRR‐RK) FLS2 and EFR, and the LRR receptor protein (LRR‐RP) receptors RLP23 and RLP42, respectively, represent prototypical members of these two prominent and closely related PRR families. We conducted a survey of Arabidopsis thaliana...

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EFFECTOR OF TRANSCRIPTION factors are novel plant‐specific regulators associated with genomic DNA methylation in Arabidopsis

Francesca Tedeschi, Paride Rizzo, Bui Thi Mai Huong, Andreas Czihal, więcej

New Phytologist > 221 > 1 > 261 - 278

Plant‐specific EFFECTORS OF TRANSCRIPTION (ET) are characterised by a variable number of highly conserved ET repeats, which are involved in zinc and DNA binding. In addition, ETs share a GIY‐YIG domain, involved in DNA nicking activity. It was hypothesised that ETs might act as epigenetic regulators. Here, methylome, transcriptome and phenotypic analyses were performed to investigate the role...

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An efficient CRISPR vector toolbox for engineering large deletions in Arabidopsis thaliana

Rui Wu, Miriam Lucke, Yun-ting Jang, Wangsheng Zhu, więcej

Plant Methods > 2018 > 14 > 1 > 1-9

Background Our knowledge of natural genetic variation is increasing at an extremely rapid pace, affording an opportunity to come to a much richer understanding of how effects of specific genes are dependent on the genetic background. To achieve a systematic understanding of such GxG interactions, it is desirable to develop genome editing tools that can be rapidly deployed across many different genetic...

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Image-based methods for phenotyping growth dynamics and fitness components in Arabidopsis thaliana

François Vasseur, Justine Bresson, George Wang, Rebecca Schwab, więcej

Plant Methods > 2018 > 14 > 1 > 1-11

Background The model species Arabidopsis thaliana has extensive resources to investigate intraspecific trait variability and the genetic bases of ecologically relevant traits. However, the cost of equipment and software required for high-throughput phenotyping is often a bottleneck for large-scale studies, such as mutant screening or quantitative genetics analyses. Simple tools are needed for the...

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Genome‐wide signatures of flowering adaptation to climate temperature: Regional analyses in a highly diverse native range of Arabidopsis thaliana

Daniel Tabas‐Madrid, Belén Méndez‐Vigo, Noelia Arteaga, Arnald Marcer, więcej

Plant, Cell & Environment > 41 > 8 > 1806 - 1820

Current global change is fueling an interest to understand the genetic and molecular mechanisms of plant adaptation to climate. In particular, altered flowering time is a common strategy for escape from unfavourable climate temperature. In order to determine the genomic bases underlying flowering time adaptation to this climatic factor, we have systematically analysed a collection of 174 highly diverse...

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Arabidopsis thaliana and Pseudomonas Pathogens Exhibit Stable Associations over Evolutionary Timescales

Talia L. Karasov, Juliana Almario, Claudia Friedemann, Wei Ding, więcej

Cell Host & Microbe > 2018 > 24 > 1 > 168-179.e4

Crop disease outbreaks are often associated with clonal expansions of single pathogenic lineages. To determine whether similar boom-and-bust scenarios hold for wild pathosystems, we carried out a multi-year, multi-site survey of Pseudomonas in its natural host Arabidopsis thaliana. The most common Pseudomonas lineage corresponded to a ubiquitous pathogenic clade. Sequencing of 1,524 genomes revealed...

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Dose‐dependent interactions between two loci trigger altered shoot growth in BG‐5 × Krotzenburg‐0 (Kro‐0) hybrids of Arabidopsis thaliana

Dema Alhajturki, Subhashini Muralidharan, Markus Nurmi, Beth A. Rowan, więcej

New Phytologist > 217 > 1 > 392 - 406

Hybrids occasionally exhibit genetic interactions resulting in reduced fitness in comparison to their parents. Studies of Arabidopsis thaliana have highlighted the role of immune conflicts, but less is known about the role of other factors in hybrid incompatibility in plants. Here, we present a new hybrid incompatibility phenomenon in this species. We have characterized a new case of F₁ hybrid...

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Altered chromatin compaction and histone methylation drive non-additive gene expression in an interspecific Arabidopsis hybrid

Wangsheng Zhu, Bo Hu, Claude Becker, Ezgi Süheyla Doğan, więcej

Genome Biology > 2017 > 18 > 1 > 1-16

Background The merging of two diverged genomes can result in hybrid offspring that phenotypically differ greatly from both parents. In plants, interspecific hybridization plays important roles in evolution and speciation. In addition, many agricultural and horticultural species are derived from interspecific hybridization. However, the detailed mechanisms responsible for non-additive phenotypic novelty...

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Chlorosis caused by two recessively interacting genes reveals a role of RNA helicase in hybrid breakdown in Arabidopsis thaliana

Björn Plötner, Markus Nurmi, Axel Fischer, Mutsumi Watanabe, więcej

The Plant Journal > 91 > 2 > 251 - 262

Hybrids often differ in fitness from their parents. They may be superior, translating into hybrid vigour or heterosis, but they may also be markedly inferior, because of hybrid weakness or incompatibility. The underlying genetic causes for the latter can often be traced back to genes that evolve rapidly because of sexual or host–pathogen conflicts. Hybrid weakness may manifest itself only in later...

artykuł

A single haplotype hyposensitive to light and requiring strong vernalization dominates Arabidopsis thaliana populations in Patagonia, Argentina

Luciana Kasulin, Beth A. Rowan, Rolando J.C. León, Verena J. Schuenemann, więcej

Molecular Ecology > 26 > 13 > 3389 - 3404

The growing collection of sequenced or genotyped Arabidopsis thaliana accessions includes mostly individuals from the native Eurasian and N. African range and introduced North American populations. Here, we describe the genetic and phenotypic diversity, along with habitats and life history, of A. thaliana plants collected at the southernmost end of its worldwide distribution. Seed samples were harvested...

artykuł

Activation of a Plant NLR Complex through Heteromeric Association with an Autoimmune Risk Variant of Another NLR

Diep T.N. Tran, Eui-Hwan Chung, Anette Habring-Müller, Monika Demar, więcej

Current Biology > 2017 > 27 > 8 > 1148-1160

When independently evolved immune receptor variants meet in hybrid plants, they can activate immune signaling in the absence of non-self recognition. Such autoimmune risk alleles have recurrently evolved at the DANGEROUS MIX2 (DM2) nucleotide-binding domain and leucine-rich repeat (NLR)-encoding locus in A. thaliana. One of these activates signaling in the presence of a particular variant encoded...

artykuł

Novel allelic variants in ACD6 cause hybrid necrosis in local collection of Arabidopsis thaliana

Magdalena Świadek, Sebastian Proost, Daniela Sieh, Jing Yu, więcej

New Phytologist > 213 > 2 > 900 - 915

Hybrid necrosis is a common type of hybrid incompatibility in plants. This phenomenon is caused by deleterious epistatic interactions, resulting in spontaneous activation of plant defenses associated with leaf necrosis, stunted growth and reduced fertility in hybrids. Specific combinations of alleles of ACCELERATED CELL DEATH 6 (ACD6) have been shown to be a common cause of hybrid necrosis in Arabidopsis thaliana...

artykuł

Gene silencing pathways found in the green alga Volvox carteri reveal insights into evolution and origins of small RNA systems in plants

Anne Dueck, Maurits Evers, Stefan R. Henz, Katharina Unger, więcej

BMC Genomics > 2016 > 17 > 1 > 1-15

Background Volvox carteri (V. carteri) is a multicellular green alga used as model system for the evolution of multicellularity. So far, the contribution of small RNA pathways to these phenomena is not understood. Thus, we have sequenced V. carteri Argonaute 3 (VcAGO3)-associated small RNAs from different developmental stages. Results Using this functional approach, we define the Volvox microRNA...

artykuł

1,135 Genomes Reveal the Global Pattern of Polymorphism in Arabidopsis thaliana

Carlos Alonso-Blanco, Jorge Andrade, Claude Becker, Felix Bemm, więcej

Cell > 2016 > 166 > 2 > 481-491

Arabidopsis thaliana serves as a model organism for the study of fundamental physiological, cellular, and molecular processes. It has also greatly advanced our understanding of intraspecific genome variation. We present a detailed map of variation in 1,135 high-quality re-sequenced natural inbred lines representing the native Eurasian and North African range and recently colonized North America. We...

artykuł

Epigenomic Diversity in a Global Collection of Arabidopsis thaliana Accessions

Taiji Kawakatsu, Shao-shan Carol Huang, Florian Jupe, Eriko Sasaki, więcej

Cell > 2016 > 166 > 2 > 492-505

The epigenome orchestrates genome accessibility, functionality, and three-dimensional structure. Because epigenetic variation can impact transcription and thus phenotypes, it may contribute to adaptation. Here, we report 1,107 high-quality single-base resolution methylomes and 1,203 transcriptomes from the 1001 Genomes collection of Arabidopsis thaliana. Although the genetic basis of methylation variation...

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