Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s11104-022-05573-4 |
Licence  |
|
| Title (Primary) | Development of micro-zymography: Visualization of enzymatic activity at the microscopic scale for aggregates collected from the rhizosphere |
| Author | Ghaderi, N.; Schmidt, H.; Schlüter, S.; Banfield, C.C.; Blagodatskaya, E. |
| Source Titel | Plant and Soil |
| Year | 2022 |
| Department | BOOEK; BOSYS |
| Volume | 478 |
| Page From | 253 |
| Page To | 271 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://static-content.springer.com/esm/art%3A10.1007%2Fs11104-022-05573-4/MediaObjects/11104_2022_5573_MOESM1_ESM.docx |
| Keywords | Membrane-free micro-zymography; Exo-enzymes; Fixative |
| Abstract | Aims Visualization of enzymatic activity
links microbial functioning to localization in heterogeneous soil habitats. To
assess enzymatic reactions in soil thin layer at the microscopic level, we
developed a micro-zymography approach and tested it by visualization of the
potential activity of phosphomonoesterase for aggregates collected from the
rhizosphere of Zea mays L. Methods We evaluated micro-zymography by applying fluorogenically-labeled substrate i) on individual soil aggregates freshly sampled from the rhizosphere, ii) on thin layers of aggregates (≈ 500 µm) saturated with substrate to assess the dynamics of phosphomonoesterase activity, and iii) on maize roots under laser scanning microscope upon the identified hotspots by membrane-based zymography. Results We found super transparent silicon as the most appropriate fixative to prevent sample drying. We optimized microscope settings to eliminate the soil auto-fluorescence. The fluorescent signal shifted from the free liquid phase towards the aggregate boundaries within 30 min after substrate addition and was finally detectable at the surface of a few aggregates. This was probably due to higher microbial abundance and enzymatic activity on the soil aggregates compared to the liquid phase. The enzymatic activity appeared patchy at the aggregate and root surfaces indicating heterogeneous distribution of hotspots. Conclusions The methodology including calibration, sample preparation, fixation, and monitoring was developed. The novel membrane-free micro-zymography approach is a promising tool to identify functional specificity and niche differentiation on roots and soil aggregates. This approach revealed unexplained complexity of competing processes (biochemical, hydrolytic, and physical) due to differently charged reaction products and enzyme-clay complexes. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26271 |
| Ghaderi, N., Schmidt, H., Schlüter, S., Banfield, C.C., Blagodatskaya, E. (2022): Development of micro-zymography: Visualization of enzymatic activity at the microscopic scale for aggregates collected from the rhizosphere Plant Soil 478 , 253 - 271 10.1007/s11104-022-05573-4 |
|