Somaclonal variation and chilling tolerance improvement in rice: changes in fatty acid composition

• Published in: Plant growth regulation 1998-01, Vol.24 (1), p.31-41
• Main Authors: Bertin, P. (Universite Catholique de Louvain, Louvain-la-Neuve (Belgium). Lab. de Cytogenetique), Bullens, P, Bouharmont, J, Kinet, J.M
• Format: Article
• Language: English
• Subjects: ACIDE GRAS; ACIDOS GRASOS; Adaptation to environment and cultivation conditions; Agronomy. Soil science and plant productions; Biological and medical sciences; CHEMICAL COMPOSITION; COLD; COMPOSICION QUIMICA; COMPOSITION CHIMIQUE; Cultivars; Diet; FATTY ACIDS; FRIO; FROID; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; Lipids; ORYZA SATIVA; Physical agents; Plant physiology and development; RESISTANCE A LA TEMPERATURE; RESISTENCIA A LA TEMPERATURA; SOMACLONAL VARIATION; TEMPERATURE RESISTANCE; VARIACION SOMACLONAL; VARIATION SOMACLONALE; Varietal selection. Specialized plant breeding, plant breeding aims; Vegetative apparatus, growth and morphogenesis. Senescence
• ISSN: 0167-6903; 1573-5087
• DOI: 10.1023/A:1005950113741

The relationship between chilling tolerance of six rice cultivars - Facagro 57, Facagro 76, Fujisaka 5, Kirundo 3, Kirundo 9 and IR64 -and the fatty acid composition in total lipids, phospholipids, galactolipids and neutral lipids from leaves was studied. Higher double bond index and proportions of linolenic acid in the phospholipid and galactolipid classes were related to cultivar chilling tolerance, but this was not so for the total lipids nor the neutral lipid class. The somaclonal families derived from Facagro 76, Kirundo 3 and Kirundo 9 that showed enhanced chilling tolerance as compared to their original parental cultivar were analyzed for fatty acid composition in phospholipids and galactolipids from leaves. Altered proportions in fatty acid composition in phospholipids, galactolipids or both were found in the somaclonal families derived from Facagro 76 and Kirundo 9, but not from Kirundo 3. These changes most usually resulted in higher double bond index and higher proportions in linoleic and linolenic acids which were related either to lower ratio of C16 to C18 fatty acids or to higher unsaturation in the C18 fatty acid fraction. Different mechanisms thus seem to be implicated in the altered fatty acid composition of somaclones, which may be related to the chilling tolerance improvement of some somaclonal families.[PUBLICATION ABSTRACT]