Use of cyanobacterial polysaccharides to promote shrub performances in desert soils: a potential approach for the restoration of desertified areas

Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages

“…A significantly high abundance of phototrophic microorganisms in the soil, is known to contribute to the improvement of soil quality due to the fixation of C and N, the stabilization of soils against erosion and the establishment of hydrological and nutrient cycling (Bowker et al, 2010). On these basis, it is highly probable that the inoculation of cyanobacteria created suitable conditions for the recruitment of other organisms and the colonization of soils by vascular plants (Xu et al, 2012). This hypothesis is in accordance with what is reported in Wang et al (2009).…”

“…In this connection, it has to be stressed that the monosaccharidic composition of the EPSs extracted from IBSCs in the experimental sites under study was found to be very complex, being these macromolecules characterized by the presence of a large number of different types of sugars, in spite of the limiting conditions faced by cyanobacteria in natural arid environments (Brüll et al, 2000). The high number of different types of monosaccharides and the significant presence of rhamnose and uronic acids, which is a typical feature of cyanobacterial EPSs (De Philippis et al, 2001;Hu et al, 2003;Pereira et al, 2009;Xu et al, 2012), suggest a predominant role of cyanobacteria in the excretion of these macromolecules in the IBSCs studied. The overall level of complexity of the secreted molecules can be considered as an indicator of the good capability of the inoculated cyanobacteria to adapt to the environmental conditions.…”

Exocellular Polysaccharides in Microalgae and Cyanobacteria: Chemical Features, Role and Enzymes and Genes Involved in Their Biosynthesis

“…The desmid Penium margaritaceum synthesizes a polymer constituted by different gelifi cation fractions, but with similar sugar com- Gouvea et al ( 2005 ) Anabaena torulosa Forni et al ( 1997 ) Microcystis aeruginosa f. fl os-aquae Gloaguen et al ( 1995 ) Phormidium ectocarpi C86 (= Leptolyngbya ectocarpi ) et al ( 1995 ) Phormidium cf . joveolarum MEU Gloaguen et al ( 1995 ) Phormidium autumnale VRUC164* (= Microcoleus autumnalis ) Pippo et al ( 2013 ) Phormidium autumnale VRUC164 r (= Microcoleus autumnalis ) Pippo et al ( 2013 ) Phormidium ectocarpi K5 (= Leptolyngbya ectocarpi ) Gloaguen et al ( 1995 ) Phormidium ectocarpi ME3 (= Leptolyngbya ectocarpi ) Gloaguen et al ( 1995 ) Phormidium ectocarpi N182 (= Leptolyngbya ectocarpi ) Gloaguen et al ( 1995 ) Phormidium ectocarpi PCC7375 (= Leptolyngbya ectocarpi ) et al ( 1995 ) Phormidium minutum Hu et al ( 2003 ) Phormidium tenue (= Leptolyngbya tenuis) Xu et al ( 2013 ) Phormidium sp. et al ( 1995 ) Phormidium sp.…”

Differentiation of the characteristics of excreted extracellular polysaccharides reveals the heterogeneous primary succession of induced biological soil crusts

“…Peaks for each sugar were identified on the basis of the retention time of known standards. The utilized analytical method is in accordance with Xu et al (2013).…”