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 Add this item to the list   ECHINODONTIUM TAXODII (Lentz & McKay) Gross
Page number:97 
Description type:Culture description 
Description:ECHINODONTIUM TAXODII (Lentz & McKay) Gross
Mats white to Cartridge Buff, thin to moderately thick, appressed to slightly raised, subtomentose to downy at 2 and 6 wk; margins even, appressed; odor absent at 2 wk, slightly sweet at 6 wk; agar unchanged or Cinnamon Buff to Sayal Brown under inocula at 2 and 6 wk; not fruiting by 6 wk.
MEA tr; tr-30; GAA - or +, 0-tr ; TAA -, + or +++, 0; TyA yellow to yellowish green, 0-tr
Microscopic characters: Marginal hyphae 3-4 µm diam, thin walled, nodose septate, sparsely branched, sometimes branches arising from clamps. Submerged hyphae 2-6.5 µm diam, thin walled to slightly thick walled, nodose septate, moderately branched. Aerial hyphae (a) as in submerged mat; (b) fiber hyphae 1.5-3 µm diam, thick walled but thinning at apex, basally clamped, rarely branched, sometimes lightly encrusted with hyaline, crystalline materials, abundant in aerial mats at 6 wk.
Cystidia clavate to fusiform, with a long tapering stalk, 80-250 x (2-)4-13 µm, thick walled, clamped at base, sometimes lightly encrusted at apex, absent or numerous in aerial mats at 6 wk. Chlamydospores ovoid to ellipsoid, 10-35 x 6-13 µm, slightly thick walled, intercalary, single or sometimes in chains, nonstaining in phloxine, scattered to abundant in submerged and aerial mats at 2 and 6 wk.
Sexuality: Heterothallic (Davidson & Chien 1976, p. 1156).
Cultures studied: U. S. A. --Florida-FP 48278 (rot) from Taxodium distichum (L.) Rich. ; Mississippi-FP 105284 and FP 106255 on T. distichum; North Carolina- FP 105317 (rot) from T. distichum.
Cultural descriptions: Aoshima et al. (1961, p. 149); Davidson et al. (1960, p. 268); Davidson & Chien (1976, p. 1156); Stalpers (1978, p. 62).
Species code: (1). 2. 3c. 8. 13. 34. 36. 38. (39). 47. (50).55.58.
Remarks: Echinodontium taxodii is associated with a white pocket rot of cypress throughout southeastern U. S. A. (Davidson et al. 1960; Gross 1964). It has been reported also from Japan and Taiwan (Aoshima et al. 1961; Davidson & Chien 1976). Cultures of E. taxodii often lose their vigor after prolonged cultivation on malt syrup agar. These cultures are appressed, slow growing, and lack chlamydospores and fiber hyphae. The growth rate of isolates studied by Davidson & al. (1960) is now reduced by one-half. In addition, the olive-yellow agar discoloration associated with E. taxodii on dimalt agar was not observed on MEA plates; however, on; TyA a yellowish green tint was usually present at 2 wk. Fiber hyphae and cystidia are found both in basidiomata and in cultures. The differences between the fiber hyphae and cystidia produced in culture, however, are not significant. In some isolates it is quite obvious that the cystidia develop from fiber hyphae.

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