A5054511549- Plant Molecular Biology Research
- Plant Reproductive Biology
- Photosynthetic Processes and Mechanisms
- Plant nutrient uptake and metabolism
- Polysaccharides and Plant Cell Walls
- Plant Stress Responses and Tolerance
- Plant Gene Expression Analysis
- Bioenergy crop production and management
- Light effects on plants
- Plant Water Relations and Carbon Dynamics
- Cellular transport and secretion
- Plant tissue culture and regeneration
- Plant Physiology and Cultivation Studies
- Biofuel production and bioconversion
- Plant Virus Research Studies
- Algal biology and biofuel production
- Plant and Biological Electrophysiology Studies
- Biocrusts and Microbial Ecology
- Plant Parasitism and Resistance
- Chromosomal and Genetic Variations
- Genomics and Phylogenetic Studies
- Horticultural and Viticultural Research
- Microtubule and mitosis dynamics
- Tree Root and Stability Studies
- CRISPR and Genetic Engineering
Swedish University of Agricultural Sciences
2016-2025
Umeå Plant Science Centre
2016-2025
University of California, San Francisco
2025
Beijing Forestry University
2019-2022
Zhejiang A & F University
2022
Praj (India)
2018
King Saud University
2014-2016
Umeå University
1991-2015
KTH Royal Institute of Technology
2004-2012
AlbaNova
2004-2012
We report the draft genome of black cottonwood tree, Populus trichocarpa . Integration shotgun sequence assembly with genetic mapping enabled chromosome-scale reconstruction genome. More than 45,000 putative protein-coding genes were identified. Analysis assembled revealed a whole-genome duplication event; about 8000 pairs duplicated from that event survived in A second, older is indistinguishably coincident divergence and Arabidopsis lineages. Nucleotide substitution, tandem gene...
Conifers have dominated forests for more than 200 million years and are of huge ecological economic importance. Here we present the draft assembly 20-gigabase genome Norway spruce (Picea abies), first available any gymnosperm. The number well-supported genes (28,354) is similar to >100 times smaller Arabidopsis thaliana, there no evidence a recent whole-genome duplication in gymnosperm lineage. Instead, large size seems result from slow steady accumulation diverse set long-terminal repeat...
Lateral root development inArabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants.Lateral roots originate from pairs pericycle cells, several cell files positioned opposite xylem pole, initiate series asymmetric, transverse divisions.The auxin transport inhibitor N -1-naphthylphthalamic acid (NPA) arrests lateral by blocking first division(s).We investigated basis NPA action using cell-specific reporter to demonstrate pole...
Summary The distribution and biosynthesis of indole‐3‐acetic acid (IAA) was investigated during early plant development in Arabidopsis . youngest leaves analysed, less than 0.5 mm length, contained 250 pg mg −1 IAA also exhibited the highest relative capacity to synthesize this hormone. A decrease nearly one hundred‐fold content occurred as young expanded their full size, accompanied by a clear shift both pool size synthesis capacity. correlation between high intense cell division further...
Abstract Ethylene represents an important regulatory signal for root development. Genetic studies in Arabidopsis thaliana have demonstrated that ethylene inhibition of growth involves another hormone signal, auxin. This study investigated why auxin was required by to regulate growth. We initially observed positively controls biosynthesis the apex. subsequently ethylene-regulated is dependent on (1) transport from apex via lateral cap and (2) responses occurring multiple elongation zone...
Gravity-induced root curvature has long been considered to be regulated by differential distribution of the plant hormone auxin. However, cells establishing these gradients, and transport mechanisms involved, remain identified. Here, we describe a GFP-based auxin biosensor monitor during Arabidopsis gravitropism at cellular resolution. We identify elevated levels apex in columella cells, site gravity perception, an asymmetric flux from lateral cap (LRC) toward elongation zone after...
Arabidopsis root architecture is regulated by shoot-derived signals such as nitrate and auxin. We report that mutations in the putative auxin influx carrier AUX1 modify a result of disruption hormone transport between indole-3-acetic acid (IAA) source sink tissues. Gas chromatography–selected reaction monitoring–mass spectrometry measurements revealed aux1 mutant exhibited altered IAA distribution young leaf tissues, major organs, respectively, developing seedling. Expression studies using...
The growth of perennial plants in the temperate zone alternates with periods dormancy that are typically initiated during bud development autumn. In a systems biology approach to unravel underlying molecular program apical poplar (Populus tremula x Populus alba), combined transcript and metabolite profiling were applied high-resolution time course from short-day induction complete dormancy. Metabolite gene expression dynamics used reconstruct temporal sequence events development....
Summary Lateral root formation is profoundly affected by auxins. Here we present data which indicate that light influences the of indole‐3‐acetic acid (IAA) in germinating Arabidopsis seedlings. IAA transported from developing leaves to system detectable as a short‐lived pulse roots and required for emergence lateral primordia (LRP) during early seedling development. LRP inhibited removal apical tissues prior detection root, but this treatment has minimal effects on initiation. Our results...
The endodermal tissue layer is found in the roots of vascular plants and functions as a semipermeable barrier, regulating transport solutes from soil into stream. As gateway for solutes, endodermis may also serve an important site sensing responding to useful or toxic substances environment. Here, we show that high salinity, environmental stress widely impacting agricultural land, regulates growth seedling root system through signaling network operating primarily endodermis. We report salt...
In temperate and boreal ecosystems, seasonal cycles of growth dormancy allow perennial plants to adapt winter conditions. We show, in hybrid aspen trees, that photoperiodic regulation is mechanistically distinct from autumnal cessation. Dormancy sets when symplastic intercellular communication through plasmodesmata blocked by a process dependent on the phytohormone abscisic acid. The blockage prevents growth-promoting signals accessing meristem. Thus, precocious disallowed during dormancy....
Although a substantial proportion of plant biomass originates from the activity vascular cambium, molecular basis radial growth is still largely unknown. To address whether cytokinins are required for cambial activity, we studied cytokinin signaling across zones 2 tree species, poplar (Populus trichocarpa) and birch (Betula pendula). We observed an expression peak genes encoding receptors in dividing cells. reduced levels endogenously by engineering transgenic trees (P. tremula x...
Abstract In boreal and temperate ecosystems, temperature signal regulates the reactivation of growth (bud break) in perennials spring. Molecular basis temperature-mediated control bud break is poorly understood. Here we identify a genetic network mediating hybrid aspen. The key components this are transcription factor SHORT VEGETATIVE PHASE-LIKE (SVL) , closely related to Arabidopsis floral repressor PHASE its downstream target TCP18 tree homolog branching regulator Arabidopsis. SVL...
Trees present a life form of paramount importance for terrestrial ecosystems and human societies because their ecological structure physiological function provision energy industrial materials. The genus Populus is the internationally accepted model molecular tree biology. We have analyzed 102,019 ESTs that clustered into 11,885 clusters 12,759 singletons. also provide >4,000 assembled full clone sequences to serve as basis upcoming annotation genome sequence. A public web-based EST database...
Microarray transcript profiling and RNA interference are two new technologies crucial for large-scale gene function studies in multicellular eukaryotes. Both rely on sequence-specific hybridization between complementary nucleic acid strands, inciting us to create a collection of gene-specific sequence tags (GSTs) representing at least 21,500 Arabidopsis genes which compatible with both approaches. The GSTs were carefully selected ensure that each them shared no significant similarity any...