The rhizosphere microflora of wheat and barley with special reference to gram-negative bacteria

Effectiveness of Bacterial and Fungal Isolates to Control <i>Phoma lingam</i> on Oilseed Rape <i>Brassica napus</i>

“…An average of 74 × 10 8 cfu/g root fresh weight was recorded. These results are in agreement with Kleeberger et al (1983) [30], who recorded viable counts of bacteria of 10 7 -10 8 cfu/g root fresh weight in roots of barley and wheat. Our results are also in agreement with Berg et al (1996) [9] who determined a bacterial number of 1.5 × 10 8 cfu/g root fresh root weight of OSR plants.…”

Characteristics of bacteria isolated from soil and roots of fruit trees

“…it had not been reported hitherto that the strains of Agrobacterium were predominantly isolated from the roots of fruit trees by using non-selective media. In the case of annual crops, Pseudomonas species (especially, Pseudomonas producing fluorescent pigment (FPP-Pseudomonas» have been reported to be common gram-negative bacteria isolated from the rhizosphere and rhizoplane (HOLDING 1960;ROUATT and KATZNELSON 1961;KLEEBERGER et al 1983;KATOH et al 1987) in contrast to the results obtained in this study. However, KATOH el aL (1987) reported that the composition of predominant bacteria on cucumber roots changed by addition of rice straw in soil.…”

DNA base composition of bacterial groups differentiated by a diagnostic scheme used for soil isolates

“…Since none of the isolates demonstrated a fermentative reaction in Hugh and Leifson's medium (data are not shown), 86 isolates in group I were assigned to the genus Pseudomonas which consists of the most abundant bacteria under the influence of root (Kleeberger et al 1983). The predominance of group I in our results was in agreement with this conclusion.…”