Category Archives: Cloudberries (Rubus chamaemorus)

Simultaneous determination of flavonols and phenolic acids by HPLCCoulArray in berries common in the Nordic diet

Ensieh Hajazimi (a), Rikard Landberg( a, b), Galia Zamaratskaia (a), Food Science and Technology 74 (2016) 128e134

(a) Department of Food Science, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden  (b) Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Insitutet, Stockholm, Sweden

This paper is a methods study testing a new method of detecting antioxidants in wild berries. Although the method information is interesting, of importance to us berry people is the verification that northern berries are endowed with very high levels of antioxidants, in this case flavonols and phenolic compounds even when the berries were  commercially store bought and frozen. Sea buckthorn (Hippophae rhamnoides)  topped the charts of highest flavonols, hydrobenzoic and hydrocinnamic acid compounds with lingonberry (Vaccinium vitas-idaea) and bilberry (V. myrtillus) not far behind. The cloudberry (Rubus chamaemorus)  had less than half total phenolics of the other berries.  The phenolic compound found in greatest concentration in sea buckthorn was Isorhamnetin; in lingonberry,  quercetin; in bilberry – myricetin; and finally in cloudberry – gallic acid.

berry phenolocs

 

Wouldn’t it be great if these berries were available frozen in Alaska stores? For now, enjoy berry picking or purchasing fruit at your local farmers market in summer. The health benefits can be great (although you have to eat twice as many cloudberries as the other fruit)!

Cloudberry phytonutrients change with season and cultivar

Seasonal and yearly variation of total polyphenols, total anthocyanins and ellagic acid in different clones of cloudberry (Rubus chamaemorus L.) 2018. Anne Linn Hykkerud1, Eivind Uleberg, Espen Hansen, Marieke Vervoort, Jørgen Mølmann, Inger Martinussen   Journal of Applied Botany and Food Quality 91, 96 – 102 (2018)

Scientists in Norway have done more than any others in cultivating the cloudberry, Rubus chamaemorus. A lot of research on field cultivation as well as cultivar selection have been done in that country. This study continues that research and studies the levels of two phytonutrients: ellagic acid (the most abundant in cloudberry) and total anthocyanin. They examined the content of the berries in four clones, ‘Fjordgull’, ‘Fjellgull’, ‘102’ and ‘306’ growing in  Tromsø 69°39’N 18°57’E.

Interestingly the anthocyanin which are found in small quantities, varied significantly by the seasonal weather patterns. Anthocyanin levels were greatest in cool seasons and lowest when the weather was hot. They also were highest at the beginning of harvest season and lowest at the end and differed also with cultivar. The most important chemical, ellagic acid did not show the same variation with the seasons. Instead, the biggest factor was genetics. The four cultivars tested showed significantly different levels of this chemical, and those levels also varied by year and by harvest time. Berries lose ellagic acid content life harvested after in the season.

The authors concluded that there is a lot that can be done to select for clones of cloudberry with higher levels of these phytonutrients. It also shows how nutrient levels can change drastically from season to season and even within a single season. Lessons for berry pickers? Pick early in the season. 2018. Rubus chamaemorus

 

Plant Cells as Food

Occasionally I read a journal article and my first response is “Really?” “Why in the world would somebody do that?” This is one such article. These researchers took cloudberry, lingonberry and stone berry (a type of raspberry) tissues and put them into test tubes. This process called tissue or cell culture takes living tissues, puts them into a test tube, adds a cocktail of nutrients and hormones so that the cells divide, and the result is a mass of actively dividing cells that will grow into large blobs of cells. As long as the nutrients and hormone levels are maintained, the cells will divide and divide.

Many years ago, when I was a grad student in Minnesota, other students were working on these cell cultures to see if the mass of cells in the test tubes could be used to harvest large quantities of useful chemicals, pharmaceuticals, bio pesticides and more. Rather than growing the whole plant such as the chrysanthemum-type flower that is the source of the pesticide pyrethrum, you could farm the cells and harvest the pyrethrum from the masses of cells.

Well this study takes cell farming to a new level. You are making masses of cells in a test tube so you can eat them! Rather than enjoying the trek into the woods, filling your bucket full of luscious berries, taking them home, filling your kitchen with the incredible aroma of lingonberry syrup, and then enjoying the fruits of your labor on a pile of pancakes, you will scoop out a mass of pinkish cells from a test tube, and eat them –– not sure how you prepare them. The fresh cells have a “sandy, grainy” texture. Yum!

The research was completed because of the claim that we will be running out of food on this planet because of increased population growth. Using current technology of farming, we will not have enough to feed the world. The solution is cell farming!

My opinion? I’d rather eat sawdust!

Plant cells as food – A concept taking shape (Berry cultures)

Emilia Nordlund, Martina Lille, Pia Silventoinen, Heli Nygren, Tuulikki Seppänen-Laakso, Atte Mikkelson, Anna-Marja Aura, Raija-Liisa Heiniö, Liisa Nohynek, Riitta Puupponen-Pimiä, Heiko Rischer, Food Research International Volume 107, May 2018, Pages 297–305

Abstract

Plant cell cultures from cloudberry, lingonberry and stoneberry were studied in terms of their nutritional properties as food. Carbohydrate, lipid and protein composition, in vitro protein digestibility and sensory properties were investigated. Dietary fibre content varied between 21.2 and 36.7%, starch content between 0.3 and 1.3% and free sugar content between 17.6 and 33.6%. Glucose and fructose were the most abundant sugars. High protein contents between 13.7 and 18.9% were recorded and all samples had a balanced amino acid profile. In vitro protein digestion assay showed hydrolysis by digestive enzymes in fresh cells but only limited hydrolysis in freeze-dried samples. The lipid analysis indicated that the berry cells were rich sources of essential, polyunsaturated fatty acids. In sensory evaluation, all fresh berry cells showed fresh odour and flavour. Fresh cell cultures displayed a rather sandy, coarse mouthfeel, whereas freeze-dried cells melted quickly in the mouth. All in all the potential of plant cells as food was confirmed.

Ethnobotany of the Naukan speakers, Chukotka District, Russian Far East and Western Alaska

Ethnobotany

The attached link is an article written by Kevin Jernigan, Olga S. BelichenkoValeria B. Kolosova and Darlene J. Orr that compares uses of plants including berries from the past through elder recollections compared to present uses.  They also compared usage with communities in Nome and Kotzebue. Edible plant use has dropped overall from previous years (13%) but the awareness of medicinal uses has skyrocketed (+225%) no doubt because of the interest in antioxidants and other bioactive components. I completed a similar project in the mid 1990s in Ft. Yukon, Alaska and found about a 20% drop in native plant uses, but my project was before all the interest in antioxidants. 

Some of the plants whose use had actually increased include: wild chives (Allium schoenoprasum), tilsey sage (Artemisia tilesii), crowberry (Empetrum nigrum), blueberry (Vaccinium uliginosum), lingonberry (Vaccinium vitis-idaea), river beauty (Epilobium (Camerion) latifolium, mountain sorrel (Oxyria digyna), sour dock, (Rumex arcticus), and cloudberry (Rubus chamaemorus). The plant locally called stinkweed or tilsey sage is interesting because I found it mentioned in nearly every ethnobotanical reference written in Alaska. It has extensive medicinal uses throughout the state and now the Russian Far East. All the berries mentioned are also the most popular berries harvested in northern Alaska. The berry with the greatest increase in uses from the past is mesutaq better known as masru, lingonberry or low bush cranberry. No surprise there!

 

Healthy Northern Berries Improve Glucose Utilization

This study from Norway centered around glucose control in the liver. The researchers studied the pathways of glucose uptake and described the enzymes used in the final steps of carbohydrate digestion as alpha-amylase and alpha glucosidase. Any chemical that inhibits these enzymes will slow glucose uptake in the liver and be a benefit to anyone dealing with type 2 diabetes. They studies a lot of berries (bilberry (Vaccinium myrtillus), blackberry (Rubus fruticosus), black chokeberry (Aronia melanocarpa), black currants (Ribes nigrum),  bog whortleberry (Vaccinium uliginosum), cloudberry (Rubus chamaemorus), Crowberry (Empetrum nigrum), Elderberry (Sambucus nigra), Lingonberry (Vaccinium vitas-idaea), raspberry (Rubus idaeus), red currant (Ribes rubric), rowan berries (mountain ash, Sorbus aucuparia), and sea buckthorn (Hippophae (Elaeagnus) rhamnoides). The phenolic compounds in all the berries inhibited response the enzymes that promote glucose uptake. Some berries had other chemicals that actually promoted glucose uptake: mountain ash and bilberry being the highest. The berries with the most powerful inhibitors were crowberry, cloudberry, bog whortleberry (bog blueberry), and lingonberry with crowberry being ranked number 1!

molecules-22-01806-v2

Taste testing Finnish Honey

This is an interesting research paper from the University of Turku, Finland, the Finnish Beekeepers Association and the Tallin University, Estonia. The researchers conducted sensory taste testing and completed chemical profiles of several Finnish honeys (buckwheat, cloudberry, lingonberry, white sweet clover, willow herb (fireweed) and mixed flower honeys (composed of flowering mustards, clover and raspberry, and a member of the genus, Vaccinium). They found a total of 73 compounds that contribute to the aroma of the honeys. They also tested flavor, smell, color and texture with a panel of 62 people. Buckwheat honey was described as malty with a cheese- and fecal-like and cow- and barn-like aroma. Some called it “earthy”! They found that cloudberry honey had the highest level of aromatic compounds of those tested. It was described as pungent, solvent-like, herbal and citrus-like. Lingonberry honey was described as pleasant and sweet with notes of vanilla and caramel. The others were rated well because they were most familiar to the panelists and their pleasant aromas. The honey samples that rated poorly because of strong, unfamiliar odor, flavor and aftertaste as well as dark color were buckwheat and cloudberry! Both were strongly negative in consumer appeal.

I have eaten buckwheat honey, and it is as strong and “earthy” as described, more like a molasses rather than honey, but still good especially for baking. To lump cloudberry in the category is amazing! I have never seen a beekeeper sell cloudberry honey – not enough flowers in one location, I suspect, but it doesn’t sound like anything I would invest in! Lingonberries and fireweed – yes!

Kortesniemi, M., Rosenvald, S., Laaksonen, O., Vanag, A., Ollikka, T., Vene, K., Yang, B., Sensory and chemical profiles of Finnish honeys of different botanical origins and consumer preferences, Food Chemistry (2017), doi: Honey article

 

Documenting Change in Nunavut

Here is a thesis that explores climate change through berries near Kugluktuk, Nunavut, Canada. The program is part citizen science as well as documenting the ethnobotany of the region. It includes great summaries of the most important berries and even some recipes!

ubc_2017_may_desrosiers_sarah

How to improve cloudberry fields

Nice research about increasing abundance of cloudberry plants by increasing fertilizers. Here is the abstract. The full article is available from the Canadian Journal of Plant Science.

Rubus chamaemorus rhizome development

 

 

Roadside fertilizer?

Several Alaska researchers studied the vegetation along the Dalton Highway in moist-acidic tussock-tundra in 2006. The pH of the roadside that is annually covered in fine dust from the road, increased over time from 4 to 6. . The amount of grasses did, too as well as cloudberry, Rubus chamaemorus. The fine dust may be adding a bit of fertilizer to the roadsides. It is not surprising that grasses increase especially on disturbed sites, but cloudberries are a surprise. I wonder if berry yield also increases or if it is just vegetation.

Roadside vegetation

Cloudberries and cheese

I lived in Finland for aobout 10 months many years ago.  It is there that I first heard of tasted and fell in love with the cloudberry.  One memorable way that we ate them was with Leipajuusto (bread cheese).  Its kind of like a large thin pancake of squeaky cheese.  We would eat little slices of leipajuusto with cloudberry jam on top.  Yummmm!  Here is a link for how to make the cheese:  http://www.foodgeeks.com/recipes/finnish-squeaky-cheese-leipajuusto-3808.  And here is a link to see how it looks being made and prepped with cloudberries on top! KDicristina, Fairbanks:  Cheese.

Cloudberries

 I’m very excited to hunt for cloudberries (Aqpik in Inupiaq) and nagoonberries–perhaps far. I remember seeing them occasionally in the Interior but never put much thought into them or effort into looking for them. But that’s all changed now.
Also, I’m a little jealous of the cloudberry hunt in Norway and would love to earn ‘highland gold’. The Coudberry cream sounds absolutely wonderful. I think I would fit right in with hunting and talking about when to go looking for the berries. And speculating about when they will be ripe. I love how obsessed both the Norwegians and Alaska Natives are with berries, because I’m a little obsessed as well.
Katak, M. 2015. Berries of Northwest Alaska. Available Online: https://alaskamastergardener.community.uaf.edu/2015/08/04/berries-of-northwest-alaska/. Accessed 11 Oct 2016.
Guide to cloudberries. 2011. Available Online:

Fertilizing the Tundra

This article verifies what a lot of wild stand managers have known. Adding fertilizer to wild habitats, as long as 30 years, increases grasses and deciduous shrubs and decreases the number of species. In only one habitat type – moist acidic tussock tundra – did the cloudberry, Rubus chamaemorus, increase over the years and only as an understory plant beneath dwarf birch, Betula nana. The article does not address berry yield, but I suspect, it decreased. Reductions in light levels and crowding beneath the shrubs probably made it harder for pollinators to work even if the plants produced flowers. oecologia

Phenology of Cloudberries and Lingonberries in Labrador

Here is a link to an article by Canadian Researchers who are interested in following the growth, flowering and fruiting of two of the most important wild berries, cloudberry and lingonberry. They followed phenological sequences of flowering and fruiting and documented potential pollinators in their region.  It is interesting to compare their cycles with Alaska. It was published in:

Canadian. Journal. of Plant Science. 96: 329–338 (2016)

Cloudberry and Lingon phenology

Abstract: Plant habitat, growth, fruit yield and occurrence of pollinators in cloudberry and lingonberry fields/bogs were monitored and analyzed at three locations in southern Labrador: Lanse’au Clair (51°41’ N, 57°08’ W), Red Bay (51°43’ N, 56°26’ W), and Cartwright (53°42’ N, 57°0’ W) over the two growing seasons, 2011 and 2012. The length of the growing seasons was 100–120 d (DFRA 2014) with 600–700 growing degree days (GDD) (AAFC 2014). The 2012 season was warmer than 2011. The plants recorded in belt transects belong to six families: Rosaceae, Ericaceae, Pottiaceae, Juncaeae, Equisetaceae, and Sphagnaceae. In the Ericaeae family, Vaccinium vitis-idaea, Arctostaphylos alpina, Empetrum nigrum, and Vaccinium angustifolium were found. In both seasons, the cloudberry was the first to bloom, followed by wild blueberry, lingonberry, and Labrador tea. The fruit yields of cloudberry and partridgeberry in southern Labrador were higher than those recorded in Finland, Norway, and in the USA. Pollinators were present in large numbers. Most of the specimens were from three orders: Hymenoptera, Diptera, and Lepidoptera. Temperature, precipitation, wind, and sunlight affected plant growth and the occurrence of pollinators. To our knowledge this is the most comprehensive study of plant growth, yield, and pollinators’ activity in cloudberry/partridgeberry fields conducted in Southern Labrador, Canada.

Bioactivity and Health Considerations

A very well done paper on the bioactivity and health considerations of many o the berries we have studied during this course. (Vaccinium ovalifolium, Vaccinium uliginosum, Rubus spectabilis, Rubus chamaemorus, Empetrum nigrum)  I like that they chose 3 different locations in Alaska, but I think they could have done without climate change in the title, for it was almost not even addressed.  A good read nonetheless.  Antioxidants

Carotenoids in Berries

The ripened color of the cloudberry made me curious as the carotenoid content of the berry.  I found this research paper that compared carotenoid levels of 4 northern berries.  The cloudberry (Rubus chamaemorus), blueberry (Vaccinium myrtillus), cranberry (Oxycoccus palustris) and cowberry (Vaccinium vitis-idaea) were compared in this study.   Carotene

Cloudberry flowers

This is a link to a comparative investigation of flower bud development in Male Female and Hermaphroditic cloudberry plants. Cloudberry Flower Development

Fruit Formation- Cloudberry (akpiq)

Here is a blog from Kotzebue, AK . The writer has a great series of  photos of a cloudberry or more appropriately, akpiq,  ripening.  Cloudberry ripening

Picking Cloudberries in Estonia

Here’s a short blog about cloudberry picking and recipes from Estonia. Cloudberries and cheese- looks good!  Cloudberries in Estonia

Arctic Berry Harvesting- Churchill, Canada

This site lists the common berries found in and around Churchill,Canada and great information about the berries, photos,  and personal harvesting reports, as well as tidbits about wildlife and birds in the area. Churchill, Canada Berries. It includes kinnikinnick, wild blueberries, bunchberries, cloudberries, bog cranberries, crowberries, gooseberries, raspberries, lingonberries and highbush cranberries.

Cloudberry Recipes

From my father-in-law’s favourite (sic) newspaper.  I’ll try it! http://www.telegraph.co.uk/foodanddrink/recipes/6009978/Arctic-cloudberry-recipes-Northern-lights.htmlCloudberry recipes