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91.
Moez Shiri Mokded Rabhi Abdelhak El Amrani Chedly Abdelly 《International journal of phytoremediation》2015,17(10):925-928
In a previous study, we showed that the halophyte plant model Thellungiella salsuginea was more tolerant to phenanthrene (Polycyclic Aromatic Hydrocarbon: PAH) than its relative glycophyte Arabidopsis thaliana. In the present work, we investigated the potential of another halophyte with higher biomass production, Cakile maritma, to reduce phenanthrene phytotoxicity. Sand was used instead of arable soil with the aim to avoid pollutant degradation by microorganisms or their interaction with the plant. After 6 weeks of treatment by 500 ppm phenanthrene (Phe), stressed plants showed a severe reduction (–73%) in their whole biomass, roots being more affected than leaves and stems. In parallel, Guaiacol peroxidase (GPX) activity was increased by 185 and 62% in leaves and roots, respectively. Non-enzymatic antioxidant capacity (assayed by ABTS test) was maintained unchanged in all plant organs. The model halophytic plant Thellungiella salsuginea was used as a biomarker of phenanthrene stress severity and was grown at 0 (control), 125, 250, and 375 ppm. T. salsuginea plants grown on the sand previously contaminated by 500 ppm Phe then treated by C. maritma culture (phytoremediation culture) showed similar biomass production as plants subjected to 125 ppm Phe. This suggests that the phytotoxic effects of phenanthrene were reduced by 75% by the 6-week treatment by C. maritima. Our findings indicate that C. maritima can constitute a potentially good candidate for PAH phytoremediation. 相似文献
92.
Fethi Ben Abdallah Rihab Lagha Amina Bakhrouf 《World journal of microbiology & biotechnology》2008,24(8):1507-1512
Salmonella bovismorbificans, rare serovar, isolated from patient in Tunisia were incubated during 13 years in soil. After its resuscitation, the cells
showed a biochemical profile completely inactive on Api 20E system. These cells recuperated their initial characters after
6 months of incubation in Tryptic Soy broth. The atomic force micrographs showed a reduction of the cells size and an evolution
to coccoid-shapes. After resuscitation S. bovismorbificans cells recuperated their original rod shape. These cells showed an altered envelope. The resuscitate cells were identified
by PCR following the amplification of the internal transcribed spacer (ITS) region of 16S–23S rRNA gene. 相似文献