Home research Research Themes Agronomy Institute Research overview Natural products research

Natural products research

Many Scottish plants have a long tradition of use as sources of medicines, flavourings, fragrances, dyes, cosmetic products and for other specialist purposes. Our region has a unique but varied range of growing conditions which have important effects on the vegetation and crops which grow in the region and on the chemical composition and quality of plant products. Moreover, the unspoilt Scottish environment has an excellent marketing image, making the area potentially very attractive for the production of plant-based natural products.

Scots Rose or Burnett Rose (Rosa pimpinellifolia)Our natural products research programme has focused both on traditionally used Scottish plants and on newly introduced species and has included plants used medicinally (e.g. arnica (Arnica montana) and daffodils, (Narcissus spp)) or in cosmetics (e.g. sweet gale, Myrica gale) as well as several species of northern berry with potential for food and drink uses.

Flowers of arnica (Arnica montana)

Projects

The Agronomy Institute has been involved in several natural products-based projects since it opened in 2002. Its main, recent collaborations are described below.

Investigating the potential for growing sweet gale as a crop in Scotland

Sweet gale, or bog myrtle (Myrica gale), is a deciduous shrub which is native to Scotland and is particularly common in high rainfall areas, like the north-west of the country, where it can be found from sea-level up to about 500m. It appears to grow best on wet, but well-aerated soils and has nitrogen fixing root nodules and cluster roots, allowing it to grow on nutritionally poor soils. Harvesting a wild stand of sweet gale

Sweet gale has a tradition of use in many countries for diverse purposes and, most recently, wild-harvested shoots have been used as a source of an oil for cosmetic products by Boots Plc. As a result of the high costs of this operation, interest focused on developing sweet gale as a crop for planting on farmers’ fields. With no tradition or knowledge of cultivating sweet gale as a crop, Boots Plc contracted the Agronomy Institute to investigate aspects of the plant’s cultivation in a project running from December 2007 to May 2011.

Sweet gale trial in its third year after planting As part of the project, the Agronomy Institute established trials, each containing about 1,000 plants, at 6 different locations in the north of Scotland. These were monitored over three years and two harvests to provide information on aspects like plant survival, growth, shoot yield, shoot oil content and the incidence of pests and diseases. Soil and climatic data were also collected from trial sites to look for relationships between these factors and plant growth. Other topics, investigated in Orkney, included the use of different types of planting material, investigation of different weed control strategies and the response of sweet gale to fertiliser.

Identification of traditionally used Highland plants with commercial potential

This study was undertaken for Agros Associates with a HIE Business Innovation Grant from 2010-2011. It identified a number of plants with potential for the following end-uses:

  1. preserves and beverages
  2. salads and vegetables
  3. as sources of medicinal and cosmetic products

Routes to market were also identified for these species.

Developing fruit wines from Orkney-grown northern fruit species

Fruit of aronia (Aronia melanocarpa) Orkney Wine Company ( http://www.orkneywine.co.uk/) produces a range of fruit wines and liqueurs using non-grape ingredients. With help from a Scottish Funding Council innovation grant in 2012, the Agronomy Institute helped the company identify and source unusual, locally grown ingredients to produce unique wines with a high content of local ingredients. All of the species being used have grown and yielded well in Institute research trials since 2004.

The collaboration has been assisted by chemical analyses of the fruits and wines carried out by The James Hutton Institute. During 2014, with additional support from a TSB Innovation Voucher, further assistance was provided by the research partners, and the company is being helped to establish its own fruit garden containing aronia (Aronia melanocarpa), cranberry (Vaccinium macrocarpon), elder (Sambucus nigra) and salal (Gaultheria shallon) to increase supplies of selected fruit species.

Fruit of salal (Gaultheria shallon)

The first commercial products from this collaboration include: ‘Orkney White’, a white wine containing local elder flowers, gooseberries and rosehips; ‘Orkney Rosé’, which contains aronia, salal and cranberry; and ‘Kvasir’, a liqueur which includes salal, rosehips, cranberry and elderberry.