Atypical morphology of dark septate fungal root endophytes of <i>Bouteloua </i>in arid southwestern USA rangelands

TitleAtypical morphology of dark septate fungal root endophytes of Bouteloua in arid southwestern USA rangelands
Publication TypeJournal Article
Year of Publication2003
AuthorsBarrow J.R.
Date PublishedOctober 1, 2003
ARIS Log Number131611
KeywordsBouteloua, fungal endophytes, grama grasses, structures
AbstractRoots of native grama grasses (Bouteloua sp) analyzed for internal colonization of fungal endophytes using histochemical stains and differential interference microscopy. Unique and atypical fungal structures were found to form a continuous nonpathogenic colonization of sieve elements, cortical, epidermal cells, and the root hairs and surface. Unique interfaces with sieve elements, the accumulation of large quantitie of lipids and their distribution throughout the root and the deposition of mucilage on the root surface indicates that dark septate fungi manage carbon between the plant and soil and protect the plant from drought stress. The nondestructive colonization of sieve elements suggests a novel plant-fungal association not previously reported.