INVESTIGADORES
SCERVINO Jose martin
congresos y reuniones científicas
Título:
CHANGES IN BACTERIAL COMMUNITY STRUCTURE IN SOIL AMENDED WITH DRY OLIVE RESIDUE COLONIZED BY SAPROBE FUNGI.
Autor/es:
J.A. SILES; R. DÍAZ; J.M. SCERVINO; J.A. OCAMPO; I. GARCÍA-ROMERA; I. SAMPEDRO
Lugar:
Izmir, Turkey
Reunión:
Conferencia; International Conference of IAMAW; 2010
Resumen:
<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES; mso-fareast-language:ES;} p.MsoBodyText, li.MsoBodyText, div.MsoBodyText {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES; mso-fareast-language:ES;} p.MsoBodyTextFirstIndent, li.MsoBodyTextFirstIndent, div.MsoBodyTextFirstIndent {mso-style-parent:"Texto independiente"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; text-indent:10.5pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES; mso-fareast-language:ES;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> The dry olive residue (DOR), the solid by-product arising from the olive oil two-phase extraction system is produce in large quantities. This type of residue contains toxic components, mainly phenols, capable of inhibiting microorganisms and impact negatively in soil ecosystem. The objective of the present study was to investigate the impact of either un-treated DOR or DOR incubated with immobilized saprobe fungi Panus tigrinus and Fusarium lateritium on both enzymes activities (urease, protease, phosphatase and β-glucosidase) and bacterial communities of rhizospheric soil of lettuce. We observed an increase of all hydrolytic enzymes after the soil incubation with un-treated DOR for 60 days. We also observed an increase of all enzymes activities, except urease, in soil incubated with treated DOR. The phosphatase activity was similar in soil with all types of amendant, however the enzymes activities implicated in N cycle such protease and urease were lower in soil incubated with DOR treated with P. tigrinus than the soil incubated with un-treated DOR. The DGGE analysis showed that the addition of un-treated DOR and treated DOR with the fungus F. lateritium decrease the diversity and relative abundance of soil bacterial population. However, the transformation of this residue with the fungus P. tigrinus supposes an increase in the bacterial communities. These results indicated that the DOR treated with P. tigrinus is not toxic on soil bacterial communities and this incubation process provides a residue devoid of toxicity that may be used as an organic fertilizer.