دورية أكاديمية
Effects of the inoculation of cyanobacteria on the microstructure and the structural stability of a tropical soil.
| العنوان: | Effects of the inoculation of cyanobacteria on the microstructure and the structural stability of a tropical soil. |
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| المؤلفون: | Malam Issa, Oumarou, Défarge, Christian, Le Bissonnais, Yves, Marin, Béatrice, Duval, Odile, Bruand, Ary, d'Acqui, Luigi Paolo, Nordenberg, Sophie, Annerman, Marcus |
| المساهمون: | Groupe d'Étude sur les Géomatériaux et Environnements Naturels, Anthropiques et Archéologiques - EA 3795 (GEGENAA), Université de Reims Champagne-Ardenne (URCA)-Institut national de recherches archéologiques préventives (Inrap)-Maison des Sciences Humaines de Champagne-Ardenne (MSH-URCA), Université de Reims Champagne-Ardenne (URCA)-Université de Reims Champagne-Ardenne (URCA), Institut des Sciences de la Terre d'Orléans (ISTO), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème (UMR LISAH), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Unité de Science du Sol, Institut National de la Recherche Agronomique (INRA), Istituto per lo Studio degli Ecosistemi ISE-CNR, Istituto per lo Studio degli Ecosistemi, This work formed part of CYANOSOILS project funded by European Union, contract no. ICA4-CT-2001-10058 |
| المصدر: | ISSN: 0032-079X. |
| بيانات النشر: | HAL CCSD Springer Verlag |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Cyanobacteria, Structural stability, Inoculation, Organo-mineral aggregates, Nostoc, Cryo-SEM, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment |
| الوصف: | International audience ; Cyanobacteria are widespread photosynthetic microorganisms among which some are able to fix atmospheric nitrogen. We investigated the impact of indigenous cyanobacteria strains (Nostoc) inoculation on physical characteristics of poorly aggregated soils from Guquka (Eastern Cape, South Africa). The soil aggregates (3–5 mm) were arranged into a layer of 10–20 mm thick, and sprayed with cyanobacteria solution. Subsequently the inoculated and un-inoculated samples were incubated (30C, 80% humidity, continuous illumination at 100 lmol m–2 s–1). Their micromorphological characteristics and aggregate stability were investigated, after 1, 2, 3, 4 and 6 weeks of incubation, by using high resolution Cryo-SEM and aggregate breakdown tests.Micromorphological investigations revealed that the surface of uninoculated samples remained uncovered, while the inoculated samples were partially covered by cyanobacteria material after one week of incubation. Adense superficial network of cyanobacterial filaments and extracellular polymer secretions (EPS) covered their surface after 4 and 6 weeks of incubation. Organo-mineral aggregates comprising cyanobacterial filaments and EPS were observed after 6 weeks of incubation. The results of aggregate breakdown tests showed no significant difference between un-inoculated samples after 1, 2, 3, 4 or 6 weeks, while they revealed improvement of aggregate stability for inoculated samples. The improvement of aggregate stability appeared in a short while following inoculation and increased gradually with time and cyanobacteria growth. The increase in aggregate stability is likely related to the changes induced in micromorphological characteristics by cyanobacterial filaments and EPS. It reflects the effect of coating, enmeshment, binding and gluing of aggregates and isolated mineral particles by cyanobacteria material. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-00120328; https://insu.hal.science/hal-00120328Test; https://insu.hal.science/hal-00120328/documentTest; https://insu.hal.science/hal-00120328/file/Malam_Issa-Plant_and_soil-2007.pdfTest; PRODINRA: 19664; WOS: 000243624400017 |
| DOI: | 10.1007/s11104-006-9153-9 |
| الإتاحة: | https://doi.org/10.1007/s11104-006-9153-9Test https://insu.hal.science/hal-00120328Test https://insu.hal.science/hal-00120328/documentTest https://insu.hal.science/hal-00120328/file/Malam_Issa-Plant_and_soil-2007.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.86EAD85B |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s11104-006-9153-9 |
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