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THE INFLUENCE OF SOIL AERATION ON THE EFFICIENCY OF VESICULAR‐ARBUSCULAR MYCORRHIZAS
Author(s) -
SAIF S. R.
Publication year - 1983
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1983.tb03508.x
Subject(s) - glomus , shoot , biology , phosphorus , mycorrhiza , botany , loam , inoculation , agronomy , horticulture , chemistry , soil water , symbiosis , bacteria , ecology , genetics , organic chemistry
SUMMARY Oxygen concentrations in the soil atmosphere influenced growth and mineral uptake in Eupatorium odoratum L., Sorghum bicolor (L.) Moench and Guizotia abyssinica (L.f.) Cass. inoculated with Glomus macrocarpus, Glomus mosseae and ‘white reticulate’. Shoot and root dry weights of mycorrhizal plants increased with O 2 concentration up to 16%. Dry weights of roots and shoots of non‐mycorrhizal plants were lower than those of mycorrhizal plants at all O 2 concentrations except at 2 %. Mycorrhizal and non‐mycorrhizal plants at 21 % O 2 , or non‐aerated controls, were smaller than those at 16%. Generally, mycorrhizal plants contained higher quantities of mineral elements than did non‐mycorrhizal plants and took up more nutrients as soil O 2 concentrations increased. Phosphorus concentrations of mycorrhizal plants were mostly significantly higher than those in non‐mycorrhizal plants. Soil O 2 generally did not influence the P concentrations of plants. Inoculation increased the concentrations of K and Mg in E. odoratum , but only the concentration of Mg in S. bicolor and the concentrations of Ca and Mg in Guizotia abyssinica. Only the concentrations of K and Mg in E. ordoratum , the concentrations of Ca and Mg in S, bicolor and the concentration of Mg in Guizotia aybssinica showed positive responses to increase in soil O 2 . The development of Glomus macrocarpus, Glomus mosseae and ‘white reticulate’ exhibited quantitative and qualitative responses to different soil O 2 concentrations.