IMPROVEMENT OF THE PRODUCTIVITY OF Foeniculum vulgare UNDER SALT STRESS BY USING PHOSPHATE SOLUBILIZING BACTERIA AS BIOFERTILIZATION | ||
| Journal of Agricultural Chemistry and Biotechnology | ||
| Article 3, Volume 29, Issue 2, February 2004, Pages 857-867 PDF (1.69 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jacb.2004.242483 | ||
| Authors | ||
| Azza Sh Turky1; Azza A. M. Mazhar2; Rawya A. Eid3 | ||
| 1Agricultural Microbiology Dep | ||
| 2Water Relationship and Field | ||
| 3National Research Center- Dokk.i, Cairo, Egypt | ||
| Abstract | ||
| Effects of phosphate solubilizing bacteria (PSB) and salt stress on soil biological activity, growth, essential oil persent and yield, and nutrient acquisition of fruits fennel plants (Foeniculum vulgare) were investigated in pot experiments in two seasons. Under the nonsaline (irrigation with tap water) conditions (Oppm) and moderate salt (irrigation with saline water 1500 and 3000 ppm) the rhizosphere colonization showed a significantly higher bacterial, fungal, and actinomycetes counts than the high salt (4500 ppm). The colonization by PSB decreased with increasing salinity level. Soil enzyme activities (phosphatase and dehydrogenase) decreased with increasing soil salinity, however, the degree of inhibition· varied among the enzymes assayed and the amount of salt added. Enzyme activities were higher in the rhizosphere of fennel plants inoculated with f'SB than in uninoculated plants. Inoculation with Bacillus. megalerium contributed positively to plant nutrient content, growth, essential oil, and mineral nutrition under all salinity levels. Inoculation with PSB induced significantly increase in N, P, K content and protein accumulation as compared to uninoculated treatments. Generally, concentration of all nutrients and protein accumulation decreased as the salinity levels increased in both inoculated and uninoculated treatments. Under nonsaline condition, fruit contents of Cu, Fe, and Zn were higher for treatments inoculated with PSB than uninoculated treatments, but the differences were not significant for Cu at the hi\lh salinity level (4500 ppm). The concentration of Na, Mg and Ca increased in fruits under irrigation with saline water compared to the control. The results suggest tnat fennel plants benefited from inoculation with biofertilizers phosphate solubilizir g bacteria especially under salt stress. | ||
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