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 Add this item to the list  GRAMMOTHELE SUBARGENTEA (Speg.) comb. nov.
Page number:280 
Description type:Culture description 
Description:GRAMMOTHELE SUBARGENTEA (Speg.) comb. nov.
(Figs. 9-16, 48) Basionym: Poria subargentea Speg., Rev. Arg. Hist. Nat. 1:104, 1891 (LPS 1).
=Poria pavonina Bres., Hedwigia 35:282, 1896 (NY i). =Poria lilacino-rubra Smith, in sched. (K i).
Lowe (1966:123) mistook this species and included it as a synonym of Polyporus epimiltinus Berk. & Br. (BPI i) (=Tinctoporellus epimiltinus (Berk. & Br.)Ryv.). Though it has the macroscopic aspect of a species of Poria Pers., and the hymenium does extend up to the vertical sides of the tubes in mature specimens, the microstructures are similar to those species of Grammothele Berk. & Curt., viz.: dimitic hyphal system with simple clamped generative hyphae and dextrinoid chestnut skeletal hyphae, cylindric hyaline spores (5.2-8.3 x 2.6-3.1 µm) and presence of dendrohyphidia in the borders of the dissepiments . This species may redden the substratum with an oxide-like colour, present only as a narrow band in the limits of the rot, though it is not always evident. G. lineata Berk. & Curt. differs in having 3-Unpublished data on cultural studies of Ceriporia viridans (Berk. & Br.)Donk have also revealed the same characters. Due to the morphological variations of this species (Lowe, 1966:32; Ryvarden et al., 1980:275) it was not deemed advisable to publish our results based on only one culture (BAFC n°806).
4.Lowe (1966:275) already related the species to Porogramme Pat. when describing Poria pavonina Bres.
rigs. 9-16: Microscopic cultural features of Gram mothele subargentea: 9.generative hyphae of the advancing zone; l0.wide and narrow generative hyphae of the aerial mat; ll.skeletal hyphae; 12.thick-walled generative hyphae; 13.hyaline hyphal mat; 14.arthrospores; 15.crystals; 16.plectenchyma.
a grammotheleoid macroscopic aspect, hyphal fascicles and smaller spores (4.2-5.7 x 2.1-2.6 µm).
CULTURES STUDIED: n°542: Argentina, Corrientes, Mburucuyá, Est. Santa Maria, leg. Wright, Deschamps & del Busto C-1915, 17.VIII.72 =BAFC 27921; n°2476, ibid., Saladas, Rio Santa Lucia, leg. L. Rosens vaig C-1992, 10.XII.72 =BAFC 27920.
GROWTH CHARACTERS: growth rapid, 6.0-6.5 cm/7 days, plates covered in 2 wk. Margin regular. Mats at first loosely felty in the advancing zone and tightly so on the inocu lum, becoming tightly woolly in the border of the colony and loosely so in the centre and on inoculum (Fig. 48). Mats always white, but dark reddish zones may develop underneath and colour the agar, covering a small portion or almost all the plates from the 3rd wk on. Odor sweet-fruity, later fungoid. Reverse unchanged, where reddish zones develop the agar becomes chestnut-red (Indian Red 6 L 12). Oxidase reaction in GAA: ++++ , 15 ; in TAA: ++++ , 0 ; in TyA: - , 10 ; in pCA: - (white precip.) , 0 ; with GG: + .
MICROSCOPIC CHARACTERS: Advancing zone with simple clamped, thin-walled generative hyphae, poorly branched, with constrictions, 2.6-7.3 µm wide (Fig. 9). Aerial myce lium formed with (a) simple clamped, thin-walled generative hyphae, branched, 2.1-6.2 µm wide (Fig. 10); (b) similar but narrower generative hyphae, 0.8-2.1 µm wide (Fig. 10); (c)skeletal hyphae scantily to regularly branched, 1.0-2.6 µm wide (Fig. 11); (d) simple clamped generative hyphae with up to 1.0 µm thickened walls (Fig. 12); (e) hyaline hyphal net, profusely branched, formed by empty slender hyphae, that confers on the mat its compact aspect (Fig. 13); (f) arthrospores prismatic, 2.6-11.4 x 1.0-2.1 µm, thin-walled (Fig. 14); and (g) polyhedric crystals on the agar (Fig. 15). Reddish zones are directly related with agelatinous pellicle submerged in the agar just under the surface and constituted of a plectenchyma formed by simple clamped generative hyphae with yellowish chestnut thickened walls with short protuberant branches, all strongly appressed and interwined, and embedded in a diffuse substance that dyes the agar (Fig. 16). A plectenchyma may also form under the uncoloured agar.
SPECIES CODE: 2a. 3. 8. 11. (21). 35. 36. 37. 39. 40. 42. 50. 54.
REMARKS: see page 289 for comparison with cultural studies of Tinctoporellus epimiltinus (Berk. & Br.)Ryv.
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