| Abstract Detail
Conference Wide Schaffer, Arthur [1], Petrikov, Marina [1], Hovav, Ran [1], Moy, MIchal [1], Shamay, Arik [1], Chechanov, Noam [1], Cohen, Shahar [1], Yeselson, Yelena [2], Shen, Shmuel [1], Granot, David [1], Levin, Ilan [1], Bar, Moshe [3]. Evolution under domestication of tomato fruit sugar metabolism and quality. THE evolution of the cultivated tomato is characterized by modifications of fruit sugar metabolism and accumulation. The sugar content of the tomato fruit is a major determinant of the quality and value of the crop, whether for the fresh produce market or for processing. Within the Lycopersicon germplasm there is a broad range of genetic variability for fruit carbohydrate metabolism. The cultivated L. esculentum accumulates little, if any, sucrose and its soluble sugars are comprised of approximately equimolar quantities of the hexoses, glucose and fructose. Among the wild species of Lycopersicon there exists genetic variability for biochemical traits of sucrose accumulation and modified fructose to glucose ratios in the mature fruit, as well as for modulated transient starch accumulation in the immature fruit, which can serve as a reservoir for soluble sugar in the mature fruit. These modified patterns of fruit carbohydrate metabolism are due to molecular allelic variations in loci encoding for particular enzymes of carbohydrate metabolism. Some of these variations have been found to be at the transcriptional level and some are at the protein functional level. In the case of sucrose/hexose partitioning the molecular evolution accompanying domestication can be elucidated. This genetic variability is being utilized for the development of tomato genotypes with altered carbohydrate metabolism and accumulation patterns in the fruit.
Log in to add this item to your schedule
1 - Volcani Center, Vegetable Research, Bet Dagan, 50250, Israel
2 - Volcani Center, Vegetable Crops, Bet Dagan, 50250, Israel
3 - Gedera Seed Co., Gedera, , Israel
Keywords:
carbohydrate metabolism.
Session: Poster-141
Location: Ballroom CD/Monona Terrace
Date: Tuesday, July 25th, 2006
Time: 8:00 AM
Abstract ID:338 |
