Articolo in rivista, 2008,

Effect of sugars on auxin-mediated LeEXPA2 gene expression

Arru L., Rognoni S., Poggi A., Loreti E.

AL-, -University of Modena and Reggio Emilia, I; RS, PA- University of Pisa, I; LE - IBBA-CNR, Pisa, I

The paper deals with the effect of sugars on LeEXPA2 expression in tomato (Lycopersicon esculentum) hypocotyl segments, which is a well studied system for analysis of cell elongation. We tested the interactions between sugars and different plant hormones classically known to be involved in plant growth. We found the induction of LeEXPA2 transcript accumulation to be positively affected by the presence of sucrose and other metabolizable sugars. The effect mediated by sorbitol and by a non-metabolizable glucose analogue (3-O-methylglucose) is lower, while the structural analogue of sucrose, turanose, leads to any auxin-induced increase in LeEXPA2 transcript abundance.

Plant growth regulation (Print) 55 , pp. 11–20

Keywords

Auxin, Elongation, Expansin, Lycopersicon esculentum, Sugar sensing

CNR authors

Loreti Elena

CNR institutes

IBBA – Istituto di biologia e biotecnologia agraria