Microstructural changes in bacterial exopolysaccharides during desiccation

Lignocellulolysis by ascomycetes (fungi) of a saltmarsh grass (smooth cordgrass)

“…These erosion bacteria in cordgrass stems appeared to be embedded in an extracellular matrix ( Fig. 18), perhaps as an adaptation to periodic dryness (Roberson et al, 1993).…”

Invited Review: Cryo-scanning electron microscopy (CSEM) in the advancement of functional plant biology. Morphological and anatomical applications

“…Observation of these mucilaginous components at high resolution in their native state requires the retention of their water component by cryo-fixation in situ (for bacterial mucilages see Fig. 8d; Roberson et al 1993;Roy et al 1996;Barker et al 1998;Chenu et al 2001; -for root mucilage see Mucilages and gels, p. 107).…”

“…But until recently these advantages have been exploited very little (e.g. Dorioz et al 1993;Roberson et al 1993) -the standard images of the rhizosphere being those of slowly processed, dehydrated, extracted and mechanically disrupted specimens.…”

The production of exopolysaccharide by Pseudomonas putida GAP-P45 under various abiotic stress conditions and its role in soil aggregation

“…The task of combating erosion is closely linked with the problem of restoring the crumb structure of soil. Polysaccharide networks shrink and swell dramatically with water potential changes and remain water saturated in a wide range of water poten tials [11]. An EPS producing strain Pseudomonas putida strain GAP P45 could form biofilm on the root surface of sunflower seedlings and showed improved soil aggregation and root adhering soil stability [12][13] observed a significant increase in aggregate stabil ity of root adhering soil in sunflower rhizosphere inoc ulated with the EPS producing rhizobial strain YAS34 under drought conditions.…”