Difference between revisions of "Laetiporus sp. 3"

Revision as of 00:27, 5 January 2009

This is being redescribed as a species of Laetiporus.

New species 3

Anamorph of species 3

English

Laetiporus sp. 3

Basidiocarps annual, laterally substipitate or sometimes sessile, single, occasionally imbricate but not in large clusters; pileus dimidiate to flabelliform, up to 21 cm wide, upper surface yellow or salmon orange to orange rarely whitish when fresh, fading to pale brownish or nearly white with age or drying, glabrous, azonate to faintly zonate, radiately furrow; pore surface usually yellow, sometimes pale yellowish white when fresh, fading to pale tan on drying, pores angular, 3-6 per mm, with thin dissepiments that quickly become lacerate; tube layer pale yellow or pale cream when fresh, drying pale buff to brownish, distinct, up to 3 mm thick; context white, azonate, brittle and sappy or succulent when fresh, drying crumbly or chalky, up to 3 cm thick, rapidly becoming crumbly and white in old, deteriorating specimens taste mild, odor fruity, pleasant. Ptychogasteric form annual, sessile, single or imbricate form a common base; pilei semiglobose to almost globose, irregular or convex, up to 23 cm long and 8 cm thick; upper surface at first whitish to sulphur yellow, later changing into brownish, azonate; lower surface of pileus usually smooth, but occasionally with tubes, then pore surface yellow, later changing into brownish, pores angular, 3-6 per mm, with thin dissepiments, tubes usually shallow; context at first white, brittle and sappy when fresh, later becoming brownish and finally dark brown and powdery. Hyphal system dimitic; contextual generative hyphae thin-walled, hyaline, simple-septate, with rare branching, 8-14 µm in diam.; contextual binding hyphae firm- to thick-walled, hyaline, nonseptate, much branched and interlocking, up to 18 µm in diam.; tramal generative hyphae thin-walled, hyaline simple-septate, 2.4-4.4 µm in diam.; tramal skeletal hyphae thick- to firm-walled, 2.4- 4 µm in diam. Cystidia or other sterile hymenial elements lacking. Basidia clavate, 2-4 sterigmate, 12-17 × 5-7 µm, simple-septate at the base. Basidiospores ovoid to short ellipsoid, hyaline, smooth, IKI-, CB-, (4.8-)5.2-6.8(-7.5) × (3.9-)4.1-5.5(-6.5) µm, L = 6.0 µm, W = 4.7 µm, r = 1.28, R = 1.08-1.44. The size of basidiospores produced on anamorphic form seems to be slightly smaller than those of teleomorphic form. Chlamydospores abundantly produced in ptychogasteric form, subglobose to ovoid, thick-walled, pale brown to olivaceous brown, (7-)7.5-11.5(-12) × (7-)7.5-11.5(-12) µm, 2-6 nuclei per one chlamydospore.

• Substrata: hardwoods, mainly Castanopsis and Quercus spp., occurring on dead logs, stumps and also living trees, sometimes as much as 3m or more above ground level.

• Distribution: in the warm temperate areas in Japan, China and Taiwan. • Type of decay: brown rot, stem heart rot.

• DNA sequences(nuclear ribosomal DNA of ITS1, 5.8S and ITS2)： AB308135[[1]], AB308136[[2]], AB308137[[3]], AB308138[[4]], AB308139[[5]], AB308140[[6]], AB308141[[7]], AB308142[[8]], AB308148[[9]], AB308149[[10]], AB308150[[11]], AB308151[[12]], AB308152[[13]], AB308153[[14]], AB308154[[15]], AB308155[[16]], AB308156[[17]]

• DNA sequences (elongation factor 1 α region partia)l: AB308219, AB308220, AB308221, AB308222, AB308223, AB308224, AB308225, AB308226, AB308227, AB308228, AB308229, AB308230, AB308231, AB308232, AB308233, AB308234, AB308235, AB308236, AB308237

Japanese

子実体は1年生、無柄あるいは側生の短い柄を持つ。通常単生、時に重なり合って発生するが大きな株になることはほとんどない。傘は扇型から貝殻型、幅21cm、傘の表面は新鮮な時は黄色、あるいは鮮やかなオレンジ色、まれに類白色、のちに色はあせて淡褐色からほとんど白色になる。放射状に波打つ。不明瞭な環紋がある。子実層托は菅孔状、鮮やかな黄色、淡黄色、まれに類白色。孔口はやや角型、３-６個/ mm。菅孔は新鮮時は淡黄色、類白色、古くなると淡黄褐色から褐色、長さ3mm以下。傘肉は類白色から淡黄白色、厚さ3cm余り、新鮮時は多湿柔軟でもろい肉質、古くなり乾燥するともろく砕けやすくなる。フルーティーな香りをもつ。　アナモルフは1年生、無柄、複数個固まって発生する。傘は半球形からほぼ球形あるいは不正形の凸型の傘になり、長さ23 cm 厚さ8 cm程の塊となる。子実体は新鮮な時は類白色から鮮黄色、のちに淡黄褐色から褐色。子実体の下側は通常平滑、時々非常に薄い菅孔を形成する。菅孔面は鮮黄色、孔口はやや角型、３-６個/ mm。傘肉は類白色から淡黄白色、幼時は多湿柔軟でもろい肉質、古くなり乾燥すると褐色から暗褐色になり、内部に細かい褐色の粉状の厚壁胞子を多数形成する。　子実体組織の菌糸型は2菌糸型：傘肉の原菌糸は無色、薄壁、クランプを欠く、ほとんど分岐しない、径8-14 µm。結合菌糸は厚壁、無色、隔壁はなく、頻繁に分岐し結合する。径18 µm以下。実質組織の原菌糸は薄壁、無色、クランプを欠く、2.4 - 4.4 µm。骨格菌糸は厚壁、無色、2.4- 4 µm。担子器は2-4小柄、12-17 × 5-7 µm、基部にクランプを欠く、担子胞子は広楕円形～卵形、無色、平滑、IKI-, CB-, (4.8-) 5.2 - 6.8 (-7.5) × (3.9-) 4.1-5.5(-6.5) µm, L = 6.0 µm, W = 4.7 µm, r = 1.28, R = 1.08-1.44. アナモルフに形成された担子胞子は、通常の子実体に形成された担子胞子のサイズよりもやや小さい。アナモルフ内部の厚壁胞子は、類球形から卵型、厚壁、淡褐色からオリーブ褐色、(7-)7.5-11.5(-12) × (7-)7.5-11.5(-12) µm.

• 基質および宿主：広葉樹、主にシイ属およびコナラ属。倒木、切株、枯死木、生立木の3メートル以上の高さに発生することもある。

• 分布：暖温帯。日本、中国、台湾。

• 腐朽型・腐朽部位：褐色腐朽、根株腐朽あるいは幹心材腐朽