Skip to main content

Table 2 Morphological features of the Saprolegnia-Achlya clade genera including discharge mode, sporangial characteristics and zoospore motile flagellate phases.

From: Multiple barcode assessment within the Saprolegnia-Achlya clade (Saprolegniales, Oomycota, Straminipila) brings order in a neglected group of pathogens

Genus

Discharge mode

Sporangia

Flagellated zoospores

Saprolegnia

saprolegnoid

New sporangia renewed by internal proliferation

dimorphic (primary+secondary)

Pythiopsis

saprolegnoid

New sporangia renewed sympodially, in cymose or basipetalous fashion

monomorphic (primary)

Protoachlya

protoachloid

Some zoospores swim and some encyst and form a loose cluster

dimorphic (primary +secondary)

Isoachlya

saprolegnoid

New sporangia formed by cymose branching or internal proliferation

dimorphic (primary+ secondary)

Scoliolegnia

saprolegnoid

Newsporangia renewed by internal proliferation, cymose branching or basipetal succession

dimorphic (primary +secondary)

Newbya

achlyoid

Sporangia fusiform orfiliform, renewed by cymose branching

monomorphic (secondary)

Aplanes

aplanoid or achlyoid

Sporangia cylindrical or fusiform; spores germinate in situ, inside sporangium

0 lack flagellate zoospores

Calyptralegnia

thraustothecoid or calyptralegnoid

Sporangia fusiform, cylindrical or clavate; renewed sympodially, or in a basipetalous or cymose fashion

monomorphic (secondary)

Aplanopsis

achlyoid or without sporangia

Sporangia usually unknown

no planonts were seen

Achlya

achlyoid

New sporangia renewed sympodially, in cymose or basipetalous fashion

monomorphic (secondary)

Thraustotheca

thraustothecoid

Sporangia clavate, obpyriform, fusiform, renewed sympodially or in cymose manner

monomorphic (secondary)

Leptolegnia

leptolegnoid

Sporangia cylindrical, elongate, sometimes renewed by internal proliferation, spores produced in a single row

dimorphic (primary+ secondary)

Geolegnia

geolegnoid

Sporangia cylindrical, elongate or swollen at intervals, nonseptate, formed sympodially, spores produced in a single row

0 lack flagellate zoospores

Dictyuchus

dictyucoid

Sporangia cylindrical to clavate, renewed sympodially or in basipetalous fashion, spores produced in a 1 or more than one row

monomorphic (secondary)

Brevilegnia

achlyoid, dictyucoid or brevilegnoid

Sporangia cylindrical to clavate, renewed sympodially, in cymose or basipetalous fashion, spores produced in a 1 or more than one row

monomorphic or not swimming

Aphanomyces

achlyoid

Sporangia filamentous, spores produced in a single row

dimorphic (primary lackflagella)