Peronospora arborescens (Berkeley) de Bary, 1863

on Papaver

Peronospora arborescens: galls on Papaver rhoeas

Papaver rhoeas, Belgium, prov. Namur, Couvin, Aublain © Sébastien Carbonnelle

Peronospora nr. arborescens on Papaver dubium

Peronospora nr. arborescens on Papaver dubium, Belgium, prov. Antwerp, Meerhout © Carina Van Steenwinkel

Peronospora nr. arborescens on Papaver dubium

infected leaf, underside

Peronospora nr. arborescens conidiophore

conidiophore

Peronospora nr. arborescens conidiophore

conidiophore, terminal branches (congo red staining)

Peronospora nr. arborescens conidia

conidia

gall

upper side of the leaves with small, venation-delimited, initially yellow, ultimately red to brown, spots. Their underside with a felty down, consisting of erect, 360-600 µm high conidiophores that apically several times are dichotomously branching, each branch ending in a conidium

hostplants

Papaveraceae, nauw monophagous

Papaver rhoeas.

also Papaver dubium?

In the molecular-genetic analysis by Voglmayr ao landed the samples from Papaver dubium on a separate position, between Peronospora arborescens and P. somniferi. Because they had a relatively limited material at their disposition it was decided to leave this material without a name.
Jage, Klenke, Kruse ao provisionally place also material from P. croceum, lasiothrix, lateritium, orientale, and pilosum under arborescens.

synonyms

See the discussion under Peronospora minor.

notes

considered by Mułenko ao (2010a) a neophyte; first observation in Poland was in 1866.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a), Buhr (19645a), Choi, Constantinescu & Shin (2007a), Cunnington (2008a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Losa España (1944a), Mułenko, Piątek, Wołczańska ao (2010a), Kruse (2014a), Kruse & Jage (2014a), Müller (2015a), Müller & Kokeš (2008a), Negrean, Constantinescu & Denchev (2004a), Özaslan, Hüseyin & Erdogdu (2014a), Redfern & Shirley (2011a), Săvulescu (1948a), Thines, Telle, Ploch & Runge (2009b), Tomasi (2014a), Voglmayr (2003a), Voglmayr, Montes-Borrego & Landa (2014a).

mod 31.viii.2018