Université de Neuchâtel

Isoflavonoid exudation from white lupin roots is influenced by phosphate supply, root type and cluster-root stage

Weisskopf, Laure ; Tomasi, Nicola ; Santelia, Diana ; Martinoia, Enrico ; Langlade, Nicolas Bernard ; Tabacchi, Raphael ; Abou-Mansour, Eliane

In: New Phytologist, 2006, vol. 171, no. 3, p. 657-668

• The internal concentration of isoflavonoids in white lupin (Lupinus albus) cluster roots and the exudation of isoflavonoids by these roots were investigated with respect to the effects of phosphorus (P) supply, root type and cluster-root developmental stage. • To identify and quantify the major isoflavonoids exuded by white lupin roots, we used high-pressure liquid...

Université de Neuchâtel

A physiological and molecular approach to study organic acid exudation and development of cluster roots in Lupinus albus L

Langlade, Nicolas Bernard ; Martinoia, E (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2002 ; 1614.

Cluster roots (or proteoid roots) are bottlebrush-like structures, developed by hundreds of plant species (mainly of Proteaceae family, but also the legume Lupinus albus L.) induced by nutrient stresses, especially P. These structures are characterized by a strong capacity to exude citrate (up to 7 µmol .h-1 .g-1) and malate in the rhizosphere and thus to increase the availability of P, Fe and...