Showing papers on "Phosphate solubilizing bacteria published in 1977"
01 Jan 1977-Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie
TL;DR: In this article, the authors studied the occurrence of bacteria, acid producing and phosphate dissolving micro-organisms in soil, rhizosphere, and rizoplane of Egyptian cotton, peas, or maize during their different growth phases.
20 citations
TL;DR: The abundance of mycelial-forming bacteria and of aerobic sporeformers in Egyptian soil is important as they are well known to resist adverse conditions, such as high temperature and dryness to which the authors' soils are subjected most time of the year.
Abstract: Two hundred colonies which showed positive reaction on the plates prepared for the phosphate-dissolving bacteria from control soil rhizosphere soils and rhizoplane samples of maize, peas, or cotton were isolated at random. Fifty isolates were selected as the most efficient isolates according to their capability for increasing the amounts of available phosphorus in the media with corresponding decreases in pH values. The percentage of the most efficient isolates differed according to type of plant and location of isolation. Not only the morphological types of the phosphate-dissolving bacteria differed in soil and in rhizosphere, but they also differed in the rhizosphere soil of each special plant. Morphological differences in the isolates from rhizosphere soil and from rhizoplane samples of the same plant were also occurring. The abundance of mycelial-forming bacteria and of aerobic sporeformers in Egyptian soil is important as they are well known to resist adverse conditions, such as high temperature and dryness to which our soils are subjected most time of the year.
7 citations
TL;DR: Inoculated wheat grains and broad-bean seeds with the different types of phosphate-dissolvers resulted in increased uptake of phosphorus as well as in phosphorus content of the plants, grown either under sterile or non-sterile conditions.
Abstract: Summary Three different types of the most efficient phosphate-dissolvers were separately used for inoculating either wheat grains or broad-bean seeds. The selected micro-organisms were: aerobic spore-forming bacilli, non-sporeforming micrococci, and mycelial formers (actinomycetes). Both sterile and non-sterile soils as well as control pots (without seed inoculation) were used for growing the two plants (for 40 days) to find the effect of inoculation on plant growth, phosphorus percentage in the plants and uptake of phosphorus. Inoculated wheat grains and broad-bean seeds with the different types of phosphate-dissolvers resulted in increased uptake of phosphorus as well as in phosphorus content of the plants, grown either under sterile or non-sterile conditions. Generally, however, both plants contained greater quantities of phosphorus when grown in the presence of normal soil microflora (non-sterilized soil) than in their absence. This may demonstrate the influence of natural microbial flora on the availability of phosphorus to the growing plants. The results also suggest that the individual phosphate-dissolvers are not equally effective when inoculated on different plants. The mycelial-formers were significantly superior to the other two micro-organisms with respect to their effect on P-uptake by wheat grown in sterile soil. In non-sterile soil, the aerobic sporeformer inoculant was superior in case of wheat and inferior to the other two organisms in case of broad-bean.
7 citations