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PDF - Journal of Threatened Taxa

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Foliicolous fungi <strong>of</strong> Silent ValleyHosagoudar & Riju8µmbaacb7µmFigure 122. Oidium doidgeaea - Conidiophores; b - ConidiaFigure 121. Spiropes japonicusa - Conidiogenous cells; b - Synnema; c - Conidiabrown to brown, 3–6 pseudoseptate, 40–70 μm long,8-9μm wide at the broadest portion, 2–4 μm wide at theapex and 3–5 μm broad at the base, wall smooth.Materials examined: 12.xii.2003 on Meliolaceousfungi on Mallotus sp., (Euphorbiaceae), Sairandhri, V.B.Hosagoudar et al. HCIO 46317, TBGT 1963.Powdery MildewsThe genus OidiumOidium doidgeae Bapp., Hosag. & Udaiyan, NewBotanist 22: 124, 1995 (Fig. 122).Colonies amphigenous, mostly epiphyllous, dense,confluent, persistent. Hyphae septate, branched,3.5–7.5 μm wide. Appressoria lobed and oppsite.Conidiophores straight, erect, 57–84 11m long; foot cellsstraight, cylindrical, slightly flexuous, 22–38x7.5–11.511μm, followed by a shorter cell. Conidia solitary, ovoid,ellipsoidal tocylindrical, 22–38x11–19 11μm. Germ tubeapical, simple.Materials examined: 15.xii.2003 on leaves <strong>of</strong>Triumfetta sp., (Tiliaceae), Sairandhri, Silent Valley,Kerala, V.B. Hosagoudar et al. HCIO 45913, TBGT 1675.Sphaeropsidales (Anamorphs <strong>of</strong> Asterina)The genus AsterostomellaAsterostomella daphniphylli Hosag.& Ravikumarin Hosag.& Goos,Mycotaxon 52: 471,1994; Hosag.,Chandraprabha & Agarwal, Asterinales <strong>of</strong> Kerala, p. 229,2011 (Fig. 123).Colonies amphigenous, mostly epiphyllous,crustose to velvety, up to 2mm in diameter, confluentand covering the entire upper surface <strong>of</strong> the leaves.Hyphae straight, flexuous, <strong>of</strong>ten crooked when solitary,branching alternate to irregular at acute angles, severalhyphae running closely parallel and forming a compactmycelial mat, cells 9–15.5x4.5–7.5 µm. Appressoriaalternate and produced only on the outer surface <strong>of</strong>the compact hyphae, mostly straight but rarely curved,unicellular ovate to globose, entire, 6–12.5x6–9.5 µm.Pycnothyria numerous, loosely crowded, circular inoutline, <strong>of</strong>ten ovate, 130–190 µm in diameter, coveringmembrane initially brown, later becoming dark andopaque, splitting stellately at the center or having a wideopening. Pycnothyriospores oval, ellipsoidal, pyriform,<strong>Journal</strong> <strong>of</strong> <strong>Threatened</strong> <strong>Taxa</strong> | www.threatenedtaxa.org | 05 March 2013 | 5(3): 3701–37883775

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