Abstract
The obligate plant parasite fungi in the family Albuginaceae are responsible for causing white rust diseases on weeds and they are rather common worldwide. Weedy plants with characteristic symptoms have been collected in 2014 and 2015 on location Hajdú-Bihar and Jász-Nagykun-Szolnok counties in Hungary. The determination of the species were based on the morphological characters both pathogens and hosts. Albugo candida was determined on shepherd’s purse (Capsella bursa-pastoris). Common purslane (Portulaca oleracea) is a host for Wilsoniana portulacae. The fungus Wilsonia bliti (syn.: Albugo bliti), the causal agent of white rust disease was found on redroot pigweed (Amaranthus retroflexus).
Highlights
The member of Albuginales fungus order are obligate biotrophic plant pathogens
Albugo candida was the first described species in the Albuginaceae under the name of Aecidium candidum Persoon (Gmelin, 1792), it was transferred to Uredo (Persoon, 1801), it was replaced to its own genus, Albugo
Multiple plants were collected from each weed species, víz. shepherd’s purse (Capsella bursa-pastoris /L./ Medik.), common purslane (Portulaca oleracea L.) and redroot pigweeed (Amaranthus retroflexus L.)
Summary
The member of Albuginales fungus order are obligate biotrophic plant pathogens. White rust or white blister diseases caused by the members of the Albuginaceae family has been reported from a great variety of hosts.Albugo candida was the first described species in the Albuginaceae under the name of Aecidium candidum Persoon (Gmelin, 1792), it was transferred to Uredo (Persoon, 1801), it was replaced to its own genus, Albugo (de Roussel, 1806). The member of Albuginales fungus order are obligate biotrophic plant pathogens. The fungus Albugo candida has more than 400 host species, including cultivated plants from the family Brassicaceae like horseradish (Armoracia rusticana) wide ranging at HajdúBihar County in East Hungary. More than a century after de Roussel’s discovery, Biga (1955) recognized 40 species of Albugo which were almost impossible to differentiate base only on conidial morphology. This monogenic state of the Albuginaceae only changed when Thines and Spring (2005) made their revision. They used the ultrastucture of the sporangia observed in SEM (Scanning Electron Microscope) to identify the major lineages of the family Albuginaceae
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