Pythium iranense Badali, Abrinbana & Abdollahz., 2020
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publication ID |
https://doi.org/ 10.5252/cryptogamie-mycologie2020v41a11 |
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persistent identifier |
https://treatment.plazi.org/id/038C879F-FFE3-0057-FC74-FB3B3CF9FB0B |
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treatment provided by |
Felipe |
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scientific name |
Pythium iranense Badali, Abrinbana & Abdollahz. |
| status |
sp. nov. |
Pythium iranense Badali, Abrinbana & Abdollahz. , sp. nov.
( Fig. 6 View FIG )
MYCOBANK. — MB 823190.
TYPUS. — Iran. West Azarbaijan Province, Maku, from soil under Prunus armeniaca , 10.V.2013, coll. M. Abrinbana, IRAN 16697 F as dried culture in Iranian Research Institute of Plant Protection, ex-type culture (IRAN 2386 C).
ADDITIONAL SPECIMEN EXAMINED. — Iran. West Azarbaijan Province, Maku,from soil under Prunus armeniaca , 10.V.2013, coll.M. Abrinbana, living culture in Iranian Research Institute of Plant Protection ( IRAN 2387 C) and Westerdijk Fungal Biodiversity Institute (CBS 143585).
ETYMOLOGY. — Name refers to Iran where it was first found.
DESCRIPTION
Colonies
On PCA partially submerged with a narrow chrysanthemum pattern and on CMA submerged with a narrow chrysanthemum pattern. Main hyphae up to 5 µm diam.
Sporangia and zoospores
Not observed.
Hyphal swellings
Very rarely produced, globose, terminal or intercalary,10-25 µm diam. (av. 15.08 µm).
Oogonia
Smooth-walled, occasionally with 1-3 papillae, globose, rarely elongated, terminal, subterminal, intercalary, sometimes lateral, globose oogonia 12-24 µm diam. (av. 19.65 µm), elongated oogonia up to 38 µm long.
Antheridia
1-2(-5) per oogonium, rarely several antheridia crowding around oogonia, monoclinous or diclinous, occasionally sessile. Antheridial stalks straight,sometimes crooked or wavy.Antheridial cells clavate, swollen, elongated, crook-necked, bell-shaped, occasionally with constriction, 9-21 × 4-11µm (av.13.69 × 6.92 µm).
Oospores
Globose, occasionally subglobose, rarely peanut-shaped, immature oospores sometimes provided with 1-6 projections, aplerotic, occasionally plerotic, usually one, at times two, rarely 3-4 per oogonium, globose oospores 13-22 µm diam. (av. 18.04 µm), elongated oospores up 30 µm long, the oospore wall up to 2 µm thick.
Daily growth
On PCA 0 mm at 5°C, 4 mm at 10°C, 6 mm at 15°C, 9 mm at 20°C, 13 mm at 25°C, 15 mm at 30°C, 14 mm at 35°C and 0 mm at 40°C. The isolates were viable at 5°C but not at 40°C.
NOTES
Differs from other known Pythium species by presence of antheridial complex around the oogonia, various shapes of antheridial cells, smooth-walled oogonia with papillae, ornamented oospores, (sub)globose or peanut-shaped oospores and 1-4 oospores per oogonium.
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