title: Effects of the halophytes Tecticornia indica and Suaeda fruticosa on soil enzyme activities in a Mediterranean Sabkha.
abstract: In the present work, we studied the effectiveness of the predominant halophytes of Soliman sabkha (Tecticornia indica and Suaeda fruticosa) to promote soil biological activities and ecosystem productivity. Soil Arylsulphatese ARY, beta-glucosidase beta-GLU, phosphatase PHO, invertase INV, urease URE, and dehydogenase DES activities in Extra- and Intra-tuft halophytes and plant productivity were assessed. Results revealed a high increase of microbial community and ARY, beta-GLU, PHO, INV URE and DES activities (+298%, +400%, +800%, +350%, +320%, +25% and +759%, respectively) in Intra-tuft rhizosphere as compared to Extra-tuft one, which is likely due to the significant decrease of salinity in the rhizosphere of Tecticornia indica and Suaeda fruticosa. Both perennial plants exhibited high productivities (7.4 t dry weight ha(-1) and 2.2 t dry weight ha(-1), respectively) and Na+-hyperaccumulating capacities (0.75 t Na+ ha(-1) and 0.22 t Na+ ha(-1), respectively), reducing salt constraint and favouring soil fertility. This constitutes a promising alternative to enhance productivity in such a salt-affected biotope by offering suitable microhabitat for annual glycophytes.
authors.affiliation: Laboratory of Extremophile Plants, Biotechnology Centre of Borj-Cedria, University of Tunis El Manar, Hammam-Lif, Tunisia.
authors.forename: Youssef
authors.initials: Y
authors.lastname: Ouni
authors.forename: Abdelbasset
authors.initials: A
authors.lastname: Lakhdar
authors.forename: Mokded
authors.initials: M
authors.lastname: Rabhi
authors.forename: Abderrazak
authors.initials: A
authors.lastname: Smaoui
authors.forename: A Rao
authors.initials: AR
authors.lastname: Maria
authors.forename: Abdelly
authors.initials: A
authors.lastname: Chedly
mesh_terms: D027703:Amaranthaceae / Q000502:physiology*; D001192:Arylsulfatases / Q000378:metabolism; D018533:Biomass; D055598:Chemical Phenomena; D019663:Chenopodiaceae / Q000502:physiology*; D006867:Hydrolases / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism*; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D018517:Plant Roots / Q000502:physiology; D018520:Plant Shoots / Q000502:physiology; D058441:Rhizosphere; D054712:Salinity; D055051:Salt-Tolerant Plants; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D014416:Tunisia; D014510:Urease / Q000378:metabolism; D043324:beta-Fructofuranosidase / Q000378:metabolism; D001617:beta-Glucosidase / Q000378:metabolism
chemical_list: D012987:Soil; D010088:Oxidoreductases; D006867:Hydrolases; D010744:Phosphoric Monoester Hydrolases; D001192:Arylsulfatases; D001617:beta-Glucosidase; D043324:beta-Fructofuranosidase; D014510:Urease