Sustainability Issue #2 June 2008

This is printed from, last updated 9/29/2008 1:27:30 PM


Change language


Main content

Results from research

How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Formas Research Council.

Editor: Margaretha Nordahl

Risks and benefits of GM plants

Oilseed rape modified with pea lectin: insect pests, beneficial insects, plant competition and the attitudes of farmers
Anna Lehrman
Doctoral thesis from SLU.

Plants genetically modified for insect resistance have to be tested and compared to their non-GM counterparts with respect to their effectiveness against the insect pest, negative effects on other organisms and the other changes that modification may give rise to in the ecology of the plants.

Oilseed rape is one of our most prominent oilseed crops, but it is also a crop that is intensively treated against insect pests, chiefly the pollen beetle. In the project, an evaluation was made of rapeseed lines transformed with a protein, lectin from pea seed, which through a pollen specific promoter is only expressed in the anthers and pollen.

The transgenic plants had no effect on the adult pollen beetles, but caused higher larval mortality compared with non-transgenic plants. This indicates that the transgenic oilseed rape is not directly protected from the insect pest, but, if the effect persists under natural conditions, it could, together with the natural enemies of the pollen beetle, limit population growth.

The transgenic plants were also tested to find whether modification increased competitive ability, which would result in increased dispersion of the rapeseed plant outside the field and/or that crossing into wild relatives would result in invasive populations. The transgenic plants hade no competitive advantage compared with plants without pea lectin.

Transgenic oilseed rape was found to have a higher yield when grown together with plants without lectin than when grown in monoculture, while the opposite applied for non-transgenic oilseed rape. This is probably due to deterioration in pollen quality in the transgenic oilseed rape. Since lectin is only expressed in the pollen, it is primarily other insects, e.g. the honey bee which feeds on the pollen, that are exposed. The study showed, however, that bee larvae were unaffected by the transgenic pollen.

A survey was finally made to find what Swedish farmers think are the benefits and drawbacks of growing a crop modified for insect resistance. The majority were negative to GM crops and considered that the negative attitude of the consumers was one of the main drawbacks. They saw a higher yield as the potentially greatest benefit from growing a crop modified for insect resistance.

The role of zinc transporters in the absorption, translocation and storage of cadmium in wheat
Stephen Burleigh (project leader)
Summary of results with list of publications from Department of Ecology, Lund University.

Cadmium (Cd) is considered to be the heavy metal that poses the greatest risk to human health. In Sweden grain is the most important source of cadmium in the diet. There are however great differences between varieties of grain with respect to the amount of cadmium that they can accumulate. Some transporters for zinc (Zn) play an important part for the Cd uptake of plants.

The aim of this project is to enhance understanding of the factors which govern uptake and distribution of cadmium and to begin modifying these in order to reduce the content of heavy metals in our food. One family of Zn transporters which may have a great role in Cd transport in durum wheat has been identified. This research is a start towards full characterisation of the gene family. Knowledge of the genes that participate in the transport of Cd in the plant can be instrumental in developing durum varieties which store less Cd and can also provide knowledge of how distribution can be affected by external factors.

Germination and early growth of annual weeds
Per Millberg (project leader)
Summary of results with list of publications from IFM Ecology, Linköping University.

In crop production without herbicides, knowledge is needed of the germination and early growth of annual weed species. In the project, we studied how the propensity to germinate varies and what it is that governs these variations. It is chiefly germination inhibiting mechanisms, predictability and the timing of germination that were evaluated, and also to what extent different germination properties are phylogenetically conservative or not.

The project has produced specific knowledge of germination requirements, dormancy and the environmental factors which strengthen and weaken dormancy. This knowledge can be used in predicting germination and can be of assistance in planning and prioritising weed control. The project has also produced a new model for comparisons of germination characteristics among populations, genera and species.

Mosses as a component on green roofs: establishment, specific technical properties and diversity
Nils Cronberg (project leader)
Parts of the results have been published in the scientific journal Science. Summary of results from Department of Ecology, Lund University.

Extensive green roofs with moss/Sedum cultures have attracted attention as a possible means of increasing green spaces in the urban environment. In previous research priority was given to vascular plants, while mosses were regarded less interesting and even a problem. The fact that mosses and vascular plants function in completely different ways was overlooked. Mosses have no roots but instead take up water over their entire surface. Because of this, water is rapidly taken up during rain and is lost even more rapidly in dry conditions. In comparison, mosses have a low nutrient requirement and a very good capacity to take up the substances present in rain and dry deposition (dust), including heavy metals and other pollutants. Mosses manage to photosynthesise at low temperatures in the autumn, winter and spring and are therefore green all round the year. One of the primary goals of this project has therefore been to investigate experimentally how biological differences between vascular plants and mosses influence technical properties and long term development.

The investigations confirm the picture that mosses perform an important function as a complement to vascular plants as components on green roofs. Mosses account for a large proportion of the short term water turnover on the roof. Potentially, this has great significance for the local urban  climate. In the long term, the rate of decomposition appears to be comparable between mosses and white stonecrop, but the mosses have a good capacity to take up heavy metals and other compounds from rain and dust particles. The results also show that mosses have a propensity to absorb microparticles from the air. These are considered to be one of the most serious air quality problems in the towns of today.

Responsible for this page: Kerstin Franklin

Journal links

Sustainability June 2008


Cooperation is the key E NVIRONMENTAL PROBLEMS are largely caused by mankind and its way of managing environmental and natural resources. If we are to have a chance of dealing with these ...

Focus: Across disciplinary boundaries

Environment and disciplines Environmental problems must be tackled by linking together studies of social scientific and natural scientific orientation. Formas has an annual call for grant appli... Interdisciplinary cooperation to understand the climate To understand the climate is to understand the interplay between the atmosphere, the seas, ice sheets, the biosphere and now also the anthroposphere. Research groups... Office environment affects health, wellbeing and work The way the workplace is designed has greater significance than we think. It affects health, wellbeing and work. This is shown by an ongoing interdisciplinary resear... Toxicants in combination An inflow of new chemicals to an already overloaded environment can give rise to unexpected synergi stic effects between environmental toxicants. Harvest time for genetics Billions of chickens all over the world have yellow legs. The reason for this is that mankind, over thousands of years, has greatly preferred this. But why just yell... The role of microbes in nature Six research groups from Uppsala Microbiomics Centre (UMC) at the Swedish University of Agricultural Sciences and Uppsala University are busy developing tomorrow´s t...

The Interview

Marine environment and climate the highest priority Greatly increased grants for civil research. This is what Minister of Environment Andreas Carlgren expects to see in the forthcoming research bill. He prioritizes no...


Storms and flooding damage the coast Increasingly Swedish coasts are damaged by erosion and severe flooding, overwash. At present, there are no tools to find out to what extent stretches of coast with s... Formas places special focus on three areas At its board meeting in April 2008, Formas allocated grants for research in three specially selected areas. One concerned environmental pollutants and gender differe... Nature’s calendar in network Now in the spring, a Swedish phenological network has started with the aim to collect phenological data, i.e. data relating to the timing of recurring natural events... Passive buildings – how to increase their numbers A very well informed and helpful project leader is essential to succeed in passive house construction. Increased fertility via pheromones That a cow or heifer shows signs of oestrus and can be inseminated is important for optimal production of milk. Researchers at SLU are now investigating whether pher... Stump extraction – the joker in energy supply? Stumps are an almost unused resource in the context of biofuels. A concentrated effort is now made at SLU in Uppsala into research on both the positive and negative ... Air pollution can give children asthma Children exposed to high concentrations of airborne pollutants in their first year of life run a greater risk of asthma, pollen allergy and impaired respiratory func... Stress resistant bacterium degrades pollutants Bioremediation utilises the ability of microorganisms to degrade environmental pollutants. Maria Unell shows in her doctoral thesis at SLU that Arthrobacter chloroph... Environmental archaeology database Umeå University has been given MSEK 4.5 to develop a database that will provide new knowledge on the interaction between ancient enviro­n­ments, climate and humans. Sweden values happy pigs Some consumers are willing to pay more for the meat if they know that the pig had had a good life, others because they believe that animal welfare makes for safer fo...

In Brief

Sea New marine environment institute Animals Sustainable development for reindeer husbandry Website Pesticides on the web Gender Bonus for choosing women as professors Birds Barn swallows acquitted Energy Nine good examples save energy Genetics Gene that regulates the growth of plants has been found Ethanol 100,000 ethanol cars in Sweden

Results from research

Risks and benefits of GM plants How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma... Fast food – help or scourge? How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma... The sea never shimmered so much How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma... Brick facades worth preserving How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma... Knowledge of wood required How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma... Better information, better work How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Forma...

People and News

The latest from the field of environmental researchNew appointments, prestigious awards, new research institutes – all the latest from the field of environmental research.

Further links