Arbuscular mycorrhizal colonization inLupinusand related genera

Significance of Plant-induced Solubilization of Soil Nitrogen: A Case of Komatsuna Plants Grown in Fertilized Soils

“…In these studies, both planted and unplanted soils were examined, by which the contribution of solubilization by the plant could be estimated in a way similar to ours. The effect of arbuscular mycorrhizal fungi seems to be negligible in all cases except for sorghum, because komatsuna and white lupin are known as non-mycorrhizal species (Usuki et al, 2007;Oba et al, 2001), and F. vivipara was non-mycorrhizal in the study area (Jonasson et al, 2006).…”

Inhibition of pre-symbiotic hyphal growth of arbuscular mycorrhizal fungusGigaspora margaritaby root exudates ofLupinusspp.

“…Root exudate of L. !uteus inhibited both hyphal elongation and hyphal branching, which may account for the absence of external hyphal elongation around the roots in the pot culture where L. luteus was grown in soil inoculated with G. margarita (Oba et al 2001). Root exudates of L. aridus, L. albus, and L. cosentini did not affect hyphal branching.…”

“…Root exudates of L. aridus, L. albus, and L. cosentini did not affect hyphal branching. Exter- (Oba et al 2001). Inhibition of mycorrhizal colonization in these species seemed to have occurred after hyphal penetration into the roots.…”

“…The other plants (20%) are unable to become involved in mycorrhizal association and are referred to as non-host plants. In a previous paper (Oba et al 2001), we did not observe arbuscule formation in 36 plant species of Lupinus, and concluded that only Lupinus of the tribe Genisteae, family Leguminosae is a non-host plant for arbuscular mycorrhizal (AM) symbiosis. Inhibition of colonization occurred in several steps such as external hyphal growth, appressorium formation, or arbuscu1e formation.…”

Mycorrhizal Interactions for Reforestation: Constraints to Dryland Agroforest in Brazil

“…In reforestation and agroforestry systems, legume trees have received attention, because they usually facilitate the growth of nonlegumes [66] and because all legumes have the potential to form symbiosis with AM, except for Lupinus [67,68], in spite of the fact that the great majority of Caesalpinioideae are nonnodulating [69]. Additionally, legumes can be inoculated with selected symbionts to improve survival in reforestation programs [3,33].…”