Home  Research
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Alan Marchant Project page |
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Cell wall biosynthesis and auxin signalling
Although the cell wall is a vital structural component of plants regulating cell volume and shape, little is known about its biosynthesis. The plant cell wall consists of a network of cellulose microfibrils cross-linked by glycans. This cellulose-glycan network is embedded in a matrix made up predominantly of polysaccharides and proteoglycans. Pectin forms a major component of this matrix and is also found in the middle lamella between cells where it has a role in regulating cell-cell adhesion.
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PI: Alan Marchant
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Read more... [Alan Marchant Project page]
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Anders Eriksson Project Page |
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The stem of Scots pine ( Pinus sylvestris L.) consists
of two types of wood: sapwood and heartwood. Heartwood is defined as
"the inner layers of the wood, which in a growing tree have ceased to
contain living cells, and in which reserve materials, e.g. starch, have
been removed or converted into heartwood substances". In Scots pine, as
in many other species, the heartwood extractives function as decay
inhibitors. The greater durability of the heartwood than the sapwood in
Scots pine is largely due to the presence the stilbenes pinosylvin and
pinosylvin monomethyl ether.
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PI: Anders Eriksson
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Read more... [Anders Eriksson Project Page]
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Anders Fries Project Page |
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Genetic influence on wood traits in Scots pine
During the last 15 years, I have mostly been doing research within the genetics of wood and fibre traits in Scots pine, and how to measure and evaluate those traits. The research has included:
- techniques for taking wood samples, e.g. increment cores and stem disks
- evaluating progeny tests of Scots pine for wood and fibre traits, and their relation with growth traits
- use of different techniques for analyzing wood and fibre traits, e.g. the water displacement method, X-ray and Kajaani Fiber-analysator, and applications on progeny testing
Studies in seed orchards
During 2007 and 2008 I am working in a group which studies seed orchards from different aspects. We study: i) physical development of seed orchards (growth, flowering etc.), ii) using molecular techniques, we study the pollination pattern in seed orchards and the possibilities to identify parents of open pollinated seed orchard seeds (so called breeding without breeding), iii) selective seed harvest by individual clones
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PI: Anders Fries
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Read more... [Anders Fries Project Page]
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Anita Sellstedt Project Page |
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Biodiversity of hydrogenases and sustainable nitrogen fixation
Nitrogen fixation
Use of nitrogen fixing organisms as sustainable producers of nitrogen
fertilizers is beneficial for the ecosystem. In addition, the nitrogen
produced by the nitrogen fixing organsims is less exposed to situations
where it can be denitrified and leached to the atmosphere.The relevance
of using nitrogen fixing organisms is that it is 1) cheaper than use of
industrially produced nitrogen fertilizers, 2) a sustainable source of
nitrogen and 3) less pollutants are being produced.
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PI. Anita Sellstedt
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Read more... [Anita Sellstedt Project Page]
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Annika Nordin Project Page |
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Mechanisms directing vegetation change in boreal forests exposed to nitrogen pollution
Why do nitrogen pollute boreal forests?
Nitrogen supply normally limits plant growth in high latitude ecosystems, like the boreal forest. However, during recent decades the burning of fossil fuels and the increased use of industrial fertilizers in agriculture and forestry have resulted in deposition of nitrogen pollutants over natural ecosystems.
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PI: Annika Nordin
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Read more... [Annika Nordin Project Page]
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Åsa Strand Project Page |
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Plastid-to-nucleus signalling pathways
The aim of our research is to dissect and elucidate the signalling pathways between the chloroplast and the nucleus that regulate the expression of nuclear genes encoding chloroplastic proteins. We use an integrative approach with a combination of genetics, molecular biology, cell biology and biochemistry to understand the language of the chloroplasts.
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PI: Åsa Strand
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Read more... [Åsa Strand Project Page]
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Benedicte Riber Albrectsen Project Page |
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Genotypic Variation in Aspen and Antagonist Resistance
I focus on natural variation of aspen (Populus tremula) and the identification of resistance against biotic factors. Poplar clones vary in their resistance to antagonists and in their chemical profile. Both secondary and primary metabolites in leaves may determine palatability to insect herbivores and susceptibility to pathogens. In my research I relate genotypic and phenotypic traits of poplar clones to their resistance to selected herbivores and pathogens.
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PI: Benedicte Riber Albrectsen
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Read more... [Benedicte Riber Albrectsen Project Page]
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Björn Sundberg Home Page |
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Wood formation
Secondary xylem (wood) is formed from the cambial meristem. Important fiber and wood properties such as biomass production, fiber morphology and cell wall structure and chemistry are determined during the wood-forming process. Our research is focused on the developmental and biosynthetic regulation of targeted aspects in this process using Arabidopsis and Populus as model plants.
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PI: Björn Sundberg
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Read more... [Björn Sundberg Home Page]
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Bo Zheng Project Page |
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Towards early control of wood formation: Functional study of leucine-rich repeat receptor like kinases in poplar vascular cambium
Meristems consist of undifferentiated stem cells as well as proliferating cells that produce a variety of tissues of a plant. The two primary meristems at the shoot and root apices attract most attention to annual species like Arabidopsis thaliana. However, of forest trees, a large part of the biomass is produced by the vascular cambium. The vascular cambium forms a continuous cylinder of meristematic cells in the stem, producing both secondary phloem and secondary xylem of wood. The general aim of my project is to obtain genetic markers for different stages of vascular cambium development and differentiation; to identify and characterize genes involved in regulation of cambial meristem maintenance and differentiation; and to seek vascular cambial genes able to increase wood production by affecting the early stage of xylem development.
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PI: Bo Zheng
CoPI: Göran Sandberg
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Read more... [Bo Zheng Project Page]
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Brian Jones Project Page |
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Vascular Cambium Function
Wood is derived from the vascular cambium (VC), a circumferential stem cell niche, or meristem, which in some species (e.g. the Bristlecone and Huon pines) maintains a population of undifferentiated stem cells and generates differentiated daughter cells for wood production for over a thousand years. Surprisingly, given its importance to commerce and the environment, although there has been a long tradition of anatomical and physiological analysis of the VC, almost nothing is known of the molecular bases of its establishment and function. In contrast, the study of the root and shoot apical meristems, that provide cells for tip growth, has advanced significantly in recent years. We are using the model plants Arabidopsis thaliana and hybrid aspen (Populus tremula L. x Populus tremuloides Michx.) to investigate the cellular and molecular structure and function of the VC.
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PI: Brian Jones
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Read more... [Brian Jones Project Page]
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