Skip Navigation

This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Dalmannsdóttir, S.
Right arrow Articles by Gudleifsson, B. E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Dalmannsdóttir, S.
Right arrow Articles by Gudleifsson, B. E.
Agricola
Right arrow Articles by Dalmannsdóttir, S.
Right arrow Articles by Gudleifsson, B. E.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 88 (Special Issue): 753-759, 2001
© 2001 Annals of Botany Company

Fatty Acid and Sugar Content in White Clover in Relation to Frost Tolerance and Ice-encasement Tolerance

Sigridur Dalmannsdóttir 1, Áslaug Helgadóttir 1, and Bjarni E. Gudleifsson 2

1 The Agricultural Research Institute, Keldnaholt, 112 Reykjavik, Iceland
2 The Agricultural Research Institute, Möðruvellir Experimental Station, 603 Akureyri, Iceland

sd{at}rala.is

Physiological characters relating to winter survival were measured in stolons of three white clover populations. Plants were grown in pots and hardened naturally outside in Iceland (66°N); samples were taken on three occasions from autumn to spring. The cultivar AberHerald was compared with a population that had survived one winter in experimental plots in southern Iceland (AberHerald selected) and an indigenous population from Norway (HoKv9238). Frost tolerance and ice-encasement tolerance were determined in the laboratory using meristematic stolon cuttings, and the temperature and number of days required to kill 50% of the population were calculated. Fatty acid and sugar contents of stolons were measured in the same material. The Norwegian population HoKv9238 was much more winter-hardy than the AberHerald populations and its stolons had a higher dry matter percentage. Total amounts of unsaturated fatty acids were higher in HoKv9238 than in AberHerald populations, with differences being most prominent for the 18:2 fatty acid. In September, the starch content was significantly higher in stolons of HoKv9238 than in those of the two AberHerald populations, but by January the starch content had decreased drastically, especially in HoKv9238. Sucrose was the most abundant water-soluble carbohydrate: in September, populations had similar sucrose contents but levels had decreased by January in AberHerald populations but not in HoKv9238. Comparison of the two AberHerald populations showed that the selected population was more frost- and ice-encasement tolerant than the original population in autumn. This coincided with higher levels of the 18:2 fatty acid.

White clover, frost tolerance, ice-encasement tolerance, fatty acids, carbohydrates

Submitted on January 22, 2001
Revised on March 5, 2001
Accepted on April 27, 2001


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 ANN BOT (LOND)Home page
A. Helgadottir, P. Marum, S. Dalmannsdottir, K. Daugstad, T. A. Kristjansdottir, and T. Lunnan
Combining Winter Hardiness and Forage Yield in White Clover (Trifolium repens) Cultivated in Northern Environments
Ann. Bot., November 1, 2008; 102(5): 825 - 834.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
R. P. COLLINS, A. HELGADOTTIR, M. FOTHERGILL, and I. RHODES
Variation Amongst Survivor Populations of White Clover Collected from Sites Across Europe: Growth Attributes and Physiological Responses to Low Temperature
Ann. Bot., March 1, 2002; 89(3): 283 - 292.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.