Specificity and Functional Compatibility of VA Mycorrhizal Endophytes in Association with Bradyrhizobium Strains in Cicer arietinum
Year: 1993
Type: article
Abstract: Two vesicular-arbuscular mycorrhizal (VAM) fungi, Glomus mosseae (Nicol.and Gerd.)Gerd.and Trappe or G. fasciculatum (Thaxter sensu Gerd.)Gerd.and Trappe, were tested for their functional compatibility with two Bradyrhizobium strains (Br 185 and Br 192) in Cicer arietinum.Observed effects on plant growth and nutrition by dual combinations of Bradyrhizobium and VAM fungi ranged from compatible interactions in the case of Br 185 to a pronounced functional incompatibility with stain Br 192.The association of G. fasciculatum plus Br 185 resulted in a 30% increase of growth and of nutrient content 24% (N), 42% (P), 32% (K).However, the combination of G. fasciculatum plus Br 192 reduced dry weight by (58%) and nutrient acquisition by 31% (P), 54% (K), 65% (Ca) and 44% (Mg).Nodule number also increased (53%) in the case of the compatible interaction and decreased (86%) in the incompatible associations.G. fasciculatum was more infective than G. mosseae in association with Cicer arietinum.The most nodulating Bradyrhizobium strain was Br 192.Mycorrhizal and nodular development was reduced in plants inoculated with the most invasive endophytes ( G. fasciculatum and Bradyrhizobium 192).Specific mechanisms such as the reduced level of chlorophyll content conferring functional differences in plants nodulated with the strain 192 of Bradyrhizobium could be related.In the present study the specific interaction between endophytes was tested at physiological and structural levels.Plant response depends on the particular combination of Rhizobium strain and Glomus isolate.
Authors: Juan Manuel Ruíz-Lozano, Rosario Azcón
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2509260595