Showing papers by "Jacques Berthelin published in 1982"

Ability of symbiotic and non-symbiotic rhizospheric microflora of maize (Zea mays) to weather micas and to promote plant growth and plant nutrition

Abstract: Maize was grown under axenic conditions in laboratory devices, in a K+-deficient medium, where biotite was the K+ source. In different treatments plants were inoculated by symbiotic (Glomus mosseae) and/or non symbiotic microflora. In those treatments inoculated byGlomus mosseae, the percentage of roots infection after 7 weeks plant growth was 65%. Rhizospheric bacterial population was approximately 108/g (dry weight). Endomycorrhizae stimulated growth and K uptake. Non-symbiotic microflora increased also plant growth but promoted much more biotite weathering and K uptake. Endomycorrhizae and more particularly non-symbiotic microflora increased also Ca and Mg absorption by plants. Possible mechanisms involved and implications in plant growth and pedogenesis are discussed.