BIOCHEMICAL ACTIVITY OF HALOPHILIC MICROORGANISMS IN MANGROVE ECOSYSTEM
SHAIMAA MOHAMED ABDELSADEK AHMED;
Abstract
ABSTRACT
This work aimed to study the correlation between biochemical activity in the rhizosphere of mangrove ecosystem and the microbial activity of bacteria isolated from the same ecosystem and the possibility of using these bacterial strains as biofertilizers with one of the economic and important crops: barley cultivated under salt stress through studying some growth criteria, some metabolic activities and the grain yield. Mangrove samples were collected from the mangrove community located at the Egyptian Red Sea coast and subjected for enzymatic activity determination and bacteria isolation. The enzymes activities and growth promoters production of isolated bacteria were conducted; and the best three bacterial isolates were used in a pot experiment. Individually and integrated together, the three bacterial isolates were evaluated to improve barley plantation growth and yield under salinity conditions (350 mM NaCl). In general, the salinity stress affected the growth characters, pigments contents, total free proline, antioxidant enzymes, K+/Na+ ratio and yield characters in comparison with controls. The results showed that the inoculation of barley plants with the growth promoting halophilic bacteria isolated from mangrove ecosystem enhanced plant growth and increased yield production under salinity stress conditions; besides those bacteria could be able to improve the salinity tolerance of barley plants.
Key words: Mangrove, Salinity stress,Barley, Enzymes activity, Growth promoters,Halophilic bacteria
This work aimed to study the correlation between biochemical activity in the rhizosphere of mangrove ecosystem and the microbial activity of bacteria isolated from the same ecosystem and the possibility of using these bacterial strains as biofertilizers with one of the economic and important crops: barley cultivated under salt stress through studying some growth criteria, some metabolic activities and the grain yield. Mangrove samples were collected from the mangrove community located at the Egyptian Red Sea coast and subjected for enzymatic activity determination and bacteria isolation. The enzymes activities and growth promoters production of isolated bacteria were conducted; and the best three bacterial isolates were used in a pot experiment. Individually and integrated together, the three bacterial isolates were evaluated to improve barley plantation growth and yield under salinity conditions (350 mM NaCl). In general, the salinity stress affected the growth characters, pigments contents, total free proline, antioxidant enzymes, K+/Na+ ratio and yield characters in comparison with controls. The results showed that the inoculation of barley plants with the growth promoting halophilic bacteria isolated from mangrove ecosystem enhanced plant growth and increased yield production under salinity stress conditions; besides those bacteria could be able to improve the salinity tolerance of barley plants.
Key words: Mangrove, Salinity stress,Barley, Enzymes activity, Growth promoters,Halophilic bacteria
Other data
| Title | BIOCHEMICAL ACTIVITY OF HALOPHILIC MICROORGANISMS IN MANGROVE ECOSYSTEM | Other Titles | النشاطالكيميائي الحيوي للميكروبات المحبة للملوحة في نظام المانجروف البيئي | Authors | SHAIMAA MOHAMED ABDELSADEK AHMED | Issue Date | 2016 |
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