Molecular and physiological characterization of the monosaccharide transporters gene family in Medicago truncatula. (4th February 2020)

• Record Type: Journal Article
• Authors: Komaitis, Fotios; Kalliampakou, Katerina; Botou, Maria; Nikolaidis, Marios; Kalloniati, Chrysanthi; Skliros, Dimitrios; Du, Baoguo; Rennenberg, Heinz; Amoutzias, Grigoris D; Frillingos, Stathis; Flemetakis, Emmanouil
• Editors: Sharwood, Robert
• Is Part Of: Journal of experimental botany. Volume 71:Number 10(2020)
• Page Start: 3110
• Page End: 3125
• Publication Date: 2020-02-04
• Subjects: Carbon allocation and partitioning -- carbon starvation -- gene structure -- Medicago truncatula -- monosaccharide sugar transporters -- symbiotic nitrogen fixation; Botany -- Periodicals; Botany, Experimental -- Periodicals; Plant physiology -- Periodicals; 580
• DOI: 10.1093/jxb/eraa055
• Languages: English
• ISSNs: 0022-0957

Abstract

Abstract : The Medicago truncatula genome encodes a large family of monosaccharide transporters with distinct expression patterns and a pivotal role in partitioning and utilization of sugars as well as carbon remobilization in nodules. Abstract: Monosaccharide transporters (MSTs) represent key components of the carbon transport and partitioning mechanisms in plants, mediating the cell-to-cell and long-distance distribution of a wide variety of monosaccharides. In this study, we performed a thorough structural, molecular, and physiological characterization of the monosaccharide transporter gene family in the model legume Medicago truncatula . The complete set of MST family members was identified with a novel bioinformatic approach. Prolonged darkness was used as a test condition to identify the relevant transcriptomic and metabolic responses combining MST transcript profiling and metabolomic analysis. Our results suggest that MSTs play a pivotal role in the efficient partitioning and utilization of sugars, and possibly in the mechanisms of carbon remobilization in nodules upon photosynthate-limiting conditions, as nodules are forced to acquire a new role as a source of both C and N.