Daldinia: The nature of its concentric zones

Abstract

Available online xxxKeywords: Pyrenomycete Stromal anatomy Xylariaceae a b s t r a c t The conspicuous concentric zonation occurring in stromata of species of Daldinia, based on studies on D. concentrica and D. eschscholtzii, is shown to result from a regular alternation of the orientation of the hyphae. The rings are all produced within a single growing season.There is no evidence to suggest that they are a result of successive abortion of perithecia.

<p class="Author"> <p class="Title" style="text-indent:0mm;"> Natural Products from the genus <i>Daldinia</i> and Their Bioactivities

“…The genus was established in 1863 by Cesati & De Notaris with the D.concentrica (Bolton: Fr) Ces & De Not as the type species. [1] Up to now, more than 40 species of this genus have been found worldwide, [2] and the diversity of secondary metabolites has been reported, which can produce active metabolites such as cytotoxic, antioxidant and anti-HIV. [3,4] Even the genus Daldinia, which has been studied for a long time, has not been exhaustively explored for its bioactive secondary metabolites.…”

Key Odorants from Daldinia childiae

“…When sliced open, the carbon-coloured flesh of D childiae is concentrically zoned with alternating white to dark grey bands. 17 Although typically regarded as an inedible mushroom, historically it was believed that the fungus could ward off stomach cramping, thus affording its common name, 'Cramp Balls'. 16 However, due to discrepancies in nomenclature, D childiae has been used interchangeably with D concentrica, leading some publications on D childiae to be erroneously categorized under D concentrica.…”

“…The fungal fruit bodies are small, tough and shaped like a ball with a crust‐like brown to black outer surface. When sliced open, the carbon‐coloured flesh of D childiae is concentrically zoned with alternating white to dark grey bands 17 . Although typically regarded as an inedible mushroom, historically it was believed that the fungus could ward off stomach cramping, thus affording its common name, ‘Cramp Balls’ 16 .…”