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 Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (17)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Thomas, H.
Right arrow Articles by James, A. R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Thomas, H.
Right arrow Articles by James, A. R.
Agricola
Right arrow Articles by Thomas, H.
Right arrow Articles by James, A. R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 72: 249-254, 1993
© 1993 Annals of Botany Company

Freezing Tolerance and Solute Changes in Contrasting Genotypes of Lolium perenne L. Acclimated to Cold and Drought

Henry Thomas and A. R. James

Environmental Biology Department, AFRC Institute of Grassland and Environmental Research, Welsh Plant Breeding Station, Plas Gogerddan, Aberystwyth, Dyfed, SY23 3EB, UK

Clonal ramets of 12 contrasting genotypes of Lolium perenne L. were grown in sand or soil-based compost and maintained under well-watered conditions at 20/15°C or acclimated to low temperature (2°C) or to a restricted water supply. Freezing tolerance was measured as LT50 following exposure to sub-zero temperatures in a freezing tank. Measurements were also made of osmotic potential, water-soluble carbohydrates, free proline, free amino acids, and minerals in entire tillers. Acclimation to both drought and cold lowered LT50, induced osmotic adjustment, and increased concentrations of proline and amino acids, Rooting medium had little effect on LT50, but caused large differences in osmotic potential and in proline and amino-acid concentrations. There was considerable genetic diversity for all characters measured, except for mineral contents. There was, however, no relationship between LT50 and osmotic potential or solute content that was consistent across the three sources of variation (growing medium, acclimation, genotype). Furthermore, the diverse genotypic values of cold-induced freezing tolerance were not correlated with those of drought-induced tolerance. It is concluded that more precise measurements are needed of the partitioning of solutes during acclimation and of the sensitivity of different organs and tissues to freezing.Copyright 1993, 1999 Academic Press

Perennial ryegrass, hardening, acclimation, osmotic potential, solute potential, carbohydrates, proline


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
 Crop Sci.Home page
R. H. Skinner and D. L. Gustine
Freezing Tolerance of Chicory and Narrow-Leaf Plantain
Crop Sci., November 1, 2002; 42(6): 2038 - 2043.
[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]

Home page
 Crop Sci.Home page
F. Massardo, L. Corcuera, and M. Alberdi
Embryo Physiological Responses to Cold by Two Cultivars of Oat during Germination
Crop Sci., November 1, 2000; 40(6): 1694 - 1701.
[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.