INFLUENCE OF MICROSYMBIONTS ON SOYBEAN YIELD

Seeds inoculation with preparations created on the basis of new associations of Glomus P3 and S7 and Rhizobofit has positively influenced formation of triple symbiosis and enhanced yield of soybean of «Annushka» variety in comparison with seeds inoculation with Bradyrhizobium japonicum only.

OPTIMIZATION OF NITRIC AND PHOSPHORIC SUPPLY FOR CHICK PEA

The presowing inoculation of chick pea seeds with M. ciceri high efficient strains in the field experiments of southern Steppe of Ukraine non-irrigation soils increased the seed yield by 1,4–5,5 c/ha. Application of phosphoric fertilizer in doses of P10 (row application) and P60 (plowed-under application) did not influencing triple symbiosis Cіcer arіetіnum − Mesorhizobium cіcerі − vesiculararbuscular mycorrhizal fungi negatively.

Evidence for a fungal liaison between Corallorhiza trifida (Orchidaceae) and Pinus contorta (Pinaceae)

Corallorhiza trifida Châtelain, or pale coral root orchid, is a heterotrophic, leafless, rootless, terrestrial orchid with a circumboreal distribution. Because of its relative inability to photosynthesize, the orchid obtains energy through the digestion of fungal hyphae that grow within the cells of its contorted, yellowish, coralloid rhizomes. Recently, we isolated and cultured strains of a slow-growing basidiomycete with bright yellow, clamped hyphae that are typical of the fungal cells present in C. trifida endomycorrhizas from different treed habitats at widely distributed locations in the northern hemisphere. By inoculating the roots of Pinus contorta Douglas ex Loudon seedlings with this fungus we were able to demonstrate its ability to form distinctive ectomycorrhizas with an ectotrophic, woody plant. The formation of endomycorrhizas with C. trifida and ectomycorrhizas with P. contorta indicates that in nature a triple symbiosis, with a circumboreal distribution, exists among certain trees, the coral root orchid, and this yellow basidiomycete that links the two and functions as a mycorrhizal symbiont in both. Key words: Corallorhiza trifida, orchid mycorrhiza, triple symbiosis, ectomycorrhiza, Pinus contorta.