V. Kaganzur et al., INITIAL ASSOCIATION BETWEEN HELIANTHEMUM AND TERFEZIA IS ENHANCED BY LOW IRON IN THE GROWTH-MEDIUM, New phytologist, 127(3), 1994, pp. 567-570
Activated charcoal added to artificial growth medium enhances initial
association between the mycelium of the desert truffle Terfezia leonis
Tul. and the roots of Helianthemum sessiliforum (Defs). Pers. in vitr
o. This is due, at least in part, to adsorption of iron.