COLD-ACCLIMATION IN CULTIVARS OF AVENA-SATIVA

Citation
M. Alberdi et al., COLD-ACCLIMATION IN CULTIVARS OF AVENA-SATIVA, Phytochemistry, 33(1), 1993, pp. 57-60
Citations number
34
Categorie Soggetti
Plant Sciences
Journal title
ISSN journal
00319422
Volume
33
Issue
1
Year of publication
1993
Pages
57 - 60
Database
ISI
SICI code
0031-9422(1993)33:1<57:CICOA>2.0.ZU;2-B
Abstract
Changes in frost resistance and contents of total carbohydrate, free p roline and soluble protein in response to cold were studied in two win ter cultivars of Avena sativa (cvs America and OT 220 x Omihi) with di fferent survival capacities under field conditions. Changes in polar l ipids and their constituent fatty acids were studied in cv OT 220 x Om ihi. The lowest frost resistance was found in cv America, as observed in the field. Both cultivars increased their frost resistance and tota l carbohydrates, free proline and soluble proteins during cold acclima tion. Some polar lipids (monogalactosyldiacylglycerols, digalactosyldi acylglycerols and phosphatidylinositol) increased after low temperatur e conditions in the more frost resistant cultivar. Unsaturated fatty a cids (linoleic and linolenic) increased in some lipid fractions in col d acclimated cv OT 220 x Omihi. Genetic variability between the two cu ltivars and possible frost resistance mechanisms are discussed.