A5042680736- Plant Molecular Biology Research
- Plant Reproductive Biology
- Plant Gene Expression Analysis
- Genetic and Environmental Crop Studies
- Chromosomal and Genetic Variations
- Plant Pathogens and Resistance
- Genomics and Phylogenetic Studies
- Plant Stress Responses and Tolerance
- Mediterranean and Iberian flora and fauna
- Genetic diversity and population structure
- Light effects on plants
- Plant Ecology and Taxonomy Studies
- Plant Diversity and Evolution
- Plant Taxonomy and Phylogenetics
- Agricultural Practices and Plant Genetics
- Photosynthetic Processes and Mechanisms
- Bioenergy crop production and management
- Botany, Ecology, and Taxonomy Studies
- Molecular Biology Techniques and Applications
- CRISPR and Genetic Engineering
- Plant Pathogenic Bacteria Studies
- Microtubule and mitosis dynamics
- Cellular Mechanics and Interactions
- Garlic and Onion Studies
- Ion Channels and Receptors
Leibniz Institute of Plant Genetics and Crop Plant Research
2015-2023
Max Planck Institute for Plant Breeding Research
2018-2019
University of Kassel
2008-2015
Leibniz Association
2014-2015
Friedrich Schiller University Jena
2015
University of Tübingen
2012-2014
Johns Hopkins Medicine
1993
Johns Hopkins University
1993
MicroProteins are short, single domain proteins that act by sequestering larger, multi-domain into non-functional complexes. have been identified in plants and animals, where they mostly involved the regulation of developmental processes. Here we show two Arabidopsis thaliana microProteins, miP1a miP1b, physically interact with CONSTANS (CO) a potent regulator flowering time. The miP1a/b-type microProteins evolved dicotyledonous an additional carboxy-terminal PF(V/L)FL motif. This motif...
Summary Unlike the situation in animals, final morphology of plant body is highly modulated by environment. During Arabidopsis development, intrinsic factors provide framework for basic patterning processes. CLASS III HOMEODOMAIN LEUCINE ZIPPER (HD‐ZIPIII) transcription are involved embryo, shoot and root patterning. vegetative growth HD‐ZIPIII proteins control several polarity set‐up processes such as leaves vascular system. We have identified direct target genes factor REVOLUTA (REV) using...
Significance Holocentric chromosomes are characterized by kinetochore activity along each sister chromatid. Although the structure seems to be well conserved, as in monocentric organisms, organization of holocentromeres is still elusive, and no centromeric repeat has been found associated with histone H3 variant-positive nucleosomes for any holocentric organism studied hitherto. We demonstrate that holocentrics sedge (Cyperaceae) Rhynchospora pubera possess different classes...
Significance This study provides a deep population genomic analysis of 10,000 Capsicum accessions held in genebanks and representing frame the global diversity genus. By combining single nucleotide polymorphisms (SNPs) based data passport information, we investigated structure wild domesticated peppers, tracing back to routes evolution providing model annuum distribution, which reflects human trade historical/cultural influences. Our results highlight west–east expansion, shedding light on...
In response to plant proximity or canopy shade, plants can react by altering elongation growth and development. Several members of the class II homeodomain-leucine zipper (HD-ZIPII) transcription factor family have been shown play an instrumental role in responses shade. HD-ZIP III (HD-ZIPIII), contrast, are involved basic patterning processes. We recently showed that REVOLUTA (REV), a member HD-ZIPIII family, directly positively regulates expression several genes shade-induced growth, such...
Water deficit is the most important environmental constraint severely limiting global crop growth and productivity. This study investigated early transcriptome changes in maize (Zea mays L.) primary root tissues response to moderate water conditions by RNA-Sequencing. Differential gene expression analyses revealed a high degree of plasticity response. The activity status genes (active/inactive) was determined Bayesian hierarchical model. In total, 70% expressed were constitutively active all...
As sessile organisms, plants have to continuously adjust growth and development ever-changing environmental conditions. At the end of growing season, annual induce leaf senescence reallocate nutrients energy-rich substances from leaves maturing seeds. Thus, is a means with which increase reproductive success therefore tightly coupled developmental age plant. However, can also be induced in response sub-optimal conditions as an exit strategy, accompanied by severely reduced yield. Here, we...
Microsatellites (or simple sequence repeats, SSR) are widely used markers in population genetics. Traditionally, genotyping was and still is carried out through recording fragment length. Now, next-generation sequencing (NGS) makes it easy to obtain also information for the loci of interest. This avoids misinterpretations that otherwise could arise due size homoplasy. Here, an NGS strategy described allows genotype hundreds individuals at many custom-designed SSR simultaneously, combining...
Abstract Meiotic crossovers (COs) ensure proper chromosome segregation and redistribute the genetic variation that is transmitted to next generation. Large populations demand for genome-wide, fine-scale resolution challenge existing methods CO identification. Taking advantage of linked-read sequencing, we develop a highly efficient method genome-wide identification COs at kilobase in pooled recombinants. We first test this using pool Arabidopsis F 2 recombinants, recapitulate results...
Abstract Grasses have varying inflorescence shapes; however, little is known about the genetic mechanisms specifying such shapes among tribes. Here, we identify grass-specific TCP transcription factor COMPOSITUM 1 (COM1) expressing in meristematic boundaries of different grasses. COM1 specifies branch-inhibition barley (Triticeae) versus branch-formation non-Triticeae Analyses cell size, walls and transcripts reveal regulates growth, thereby affecting wall properties signaling specifically...
Cell movement and cell-type-specific gene expression during Dictyostelium development are regulated by cAMP, which functions both as an extracellular hormone-like signal intracellular second messenger. Previous data indicated that aca- mutants, lack adenylyl cyclase activity, fail to aggregate do not express genes. We show here overexpression of ACG, a constitutively active cyclase, in wild-type cells is only expressed spore germination, partially restores the coordination cell completely...
Abstract Plant responses to insect egg depositions are known shape subsequent defensive larvae hatching from the eggs. Elm ( Ulmus minor ) leaves, on which elm leaf beetles laid their eggs, mount a more efficient defence against However, molecular mechanisms of this egg‐mediated, improved insufficiently understood and have so far only been studied in annual plants. We analysed dynamics transcriptomic changes larval feeding‐damaged leaves with without prior deposition using de novo assembled...
Lomonosova, M., Brandt, R. & Freitag, H.: Suaeda corniculata (Chenopodiaceae) and related new taxa from Eurasia. — Willdenowia 38: 81–109. ISSN 0511-9618; © 2008 BGBM Berlin-Dahlem. doi:10.3372/wi.38.38105 (available via http://dx.doi.org/)The name of the hitherto widely circumscribed species is lectotypified by a specimen Altai subdivided into two subspecies, with subsp. mongolica being tetraploid restricted to SE Siberia C Asia. Based on morphological, caryological molecular data, three S....
Cistanthe longiscapa is an endemic annual herb and characteristic element of the Chilean Atacama Desert. Principal threats are destruction its seed deposits by human activities reduced germination rates due to decreasing occurrence precipitation events. To enable population genetic phylogeographic analyses in this species we performed paired-end shotgun sequencing (2x100 bp) genomic DNA on Illumina HiSeq platform identified microsatellite (SSR) loci resulting sequences. From 29 million...
Molecular identification of mutant alleles responsible for certain phenotypic alterations is a central goal genetic analyses. In this study we describe rapid procedure suitable the induced recessive and dominant mutations applied to two Zea mays mutants expressing dwarf pale green phenotype, respectively, which were obtained through pollen ethyl methanesulfonate (EMS) mutagenesis. First, without prior backcrossing, (single nucleotide polymorphisms, SNPs) segregating in (M2 ) family derived...
Organisms adopt a wide range of strategies to adapt change. Gene silencing describes the ability organisms modulate expression susceptible genes at certain times transcriptional or translational level. In all known eukaryotic 21-nt long short interfering RNAs (siRNAs) are effector molecules post-transcriptional gene (PTGS), while 24-nt siRNAs involved in PTGS plants. Mutant studies Caenorhabditis elegans lead identification enzyme ERI (Enhancer RNAinterference) with enhanced PTGS. Although...
ABSTRACT Meiotic crossovers (COs) ensure proper chromosome segregation and redistribute the genetic variation that is transmitted to next generation. Existing methods for CO identification are challenged by large populations demand genome-wide fine-scale resolution. Taking advantage of linked-read sequencing, we developed a highly efficient method COs at kilobase resolution in pooled recombinants. We first tested this using pool Arabidopsis F 2 recombinants, obtained results recapitulated...
Suaeda iranshahrii Akhani & Freitag, previous specimens cited as S. maritima,is described a new species of sect. Brezia endemic to the coasts Persian Gulf; it is subdivided into type variety distributed along side and var. arabica Freitag from Arabian shore. The named in honour Dr. Musa Iranshahr, eminent Iranian botanist whom this Festschrift dedicated on occasion his 90th birthday. an important component plant communities tidal mudflats. Molecular, anatomical caryological evidence pointed...