Pythium iranense Badali, Abrinbana & Abdollahz., 2020

Badali, Farzaneh, Abrinbana, Masoud & Abdollahzadeh, Jafar, 2020, Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran, Cryptogamie, Mycologie 20 (11), pp. 179-191 : 185-188

publication ID

https://doi.org/ 10.5252/cryptogamie-mycologie2020v41a11

persistent identifier

https://treatment.plazi.org/id/038C879F-FFE3-0057-FC74-FB3B3CF9FB0B

treatment provided by

Felipe

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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