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Publication Type J
Authors Caravaca, F., M. D. Alguacil, P. Torres and A. Roldan
Title Microbial activities and arbuscular mycorrhizal fungi colonization in the rhizosphere of the salt marsh plant Inula crithmoides L. along a spatial salinity gradient
Source Wetlands
Author Keywords water-soluble C fractions; oxidoreductases; hydrolases; Mediterranean salt marsh; semiarid areas organic-matter; soil; nitrogen; infectivity; extraction; biomass; refuse; carbon; roots,Compositae,halophyte
Abstract This study was carried out in a Mediterranean salt marsh in semiarid Southeast Spain to assess whether a spatial salinity gradient can affect the microbiological and biochemical properties (labile C fractions, biomass C, oxidoreductases, and hydrolases) of the rhizosphere soil of Inula crithmoides and the extent of arbuscular mycorrhizal (AM) colonization in its roots. There were no significant differences in the soluble C fractions (water-soluble C and water-soluble carbohydrates) or the microbial biomass C values of the rhizosphere soil of L crithmoides among the different zones of the salt marsh. Dehydrogenase activity, hydrolases (urease, protease, phosphatase, and beta-glucosidase) and the extent of AM colonization in I. crithmoides roots were greater in the higher salt marsh zones, corresponding to those of lower rhizosphere soil salinity. This study shows that soil salinity is inversely associated with some parameters related to soil microbial activity, such as dehydrogenase activity and some hydrolases, as well as the extent of colonization by AM fungi, which can improve plant performance. However, bioactive organic matter fractions that determine soil productivity are not related to soil salinity.
Author Address CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, POB 164,Campus Espinardo, Murcia 30100, Spain CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, Murcia 30100, Spain Univ Liguel Hernandez Elche, Dept Appl Biol, Alicante 03202, Spain Caravaca F CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, POB 164,Campus Espinardo, Murcia 30100, Spain
29-Character Source Abbreviation Wetlands
Publication Date Jun
Year Published 2005
Volume 25
Issue 2
Beginning Page 350-355
Unique Article Identifier ISI:000230152900011
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