Authors: Dalel Daâssi Sahar Sellami Fakher Frikha Susana RodriguezCouto Moncef Nasri Tahar Mechichi
Publish Date: 2016/04/25
Volume: 23, Issue: 15, Pages: 15370-15380
Abstract
The aim of the present study was to evaluate the phytotoxicity of olive mill wastewater OMW after being treated by the whiterot fungus Coriolopsis gallica For this the effect of irrigation with treated OMW TOMW and untreated OMW UOMW on tomato plants Lycopersicon esculentum for 3 weeks was studied The control plants were irrigated with distilled water Agronomic tests were performed in pot experiments in a greenhouse using the randomized complete block RCB experimental design The relative leaf height RLH as a morphological parameter and the content of total phenols in the roots and total chlorophyll Cha + Chb and reducing sugars in the leaves as physiological parameters were selected as responses of the experimental design The results obtained showed that Cha + Chb in the leaves of tomato growth under TOMW was enhanced by 363 and 194 compared to the plant growth under UOMW and to the controls respectively Also reducing sugar concentrations were closed to those of the control plants ranging from 0424 to 0678 g/L for the different dilutions tested However the plants irrigated with UOMW showed lower reducing sugar concentrations ranging from 0042 to 0297g/L The optimum RLH 0537 was observed in the plants irrigated with TOMW diluted at 14 this value being higher than that observed in the controls 0438 Our study proved that the irrigation with TOMW significantly improved tomato growth and photosynthesis activity over those irrigated with UOMW Optimization of TOMW as a fertilizer was obtained for a dilution of 14 From the obtained results it can be concluded that OMW treated by C gallica holds potential to be used as a fertilizer for tomato plants
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