Pucciniastrum spotted (Pucciniastrum areolatum)

Systematika:
  • Diviziona: Basidiomycota (Basidiomycetes)
  • Fizarana: Pucciniomycotina
  • Kilasy: Pucciniomycetes (Pucciniomycetes)
  • Sobika: Incertae sedis (tsy azo antoka ny toerana)
  • Karazana: Pucciniales (Holatra harafesina)
  • Family: Pucciniastraceae (Pucciniastraceae)
  • Genus: Pucciniastrum (Pucciniastrum)
  • Type: Pucciniastrum areolatum (Pucciniastrum spotted)

:

  • High school strobilina
  • Melampsora areolata
  • Melampsora rice
  • Perichaena strobilina
  • Phelonitis strobilina
  • Pomatomyces strobilinum
  • Pucciniastrum areolatum
  • Pucciniastrum padi
  • Pucciniastrum strobilinum
  • Rosellinia strobilina
  • Thecopsora areolata
  • Thekopsora padi
  • Thekopsora strobilina
  • Xyloma areolatum

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

The genus Pucciniastrum includes a couple of dozen rust fungi, the main or intermediate host plants of which, along with spruce, are representatives of the wintergreen, orchid, rosaceae and heather families. In the case of pucciniastrum spotted, these are representatives of the genus Prunus – common cherry and antipka, sweet cherry, domestic plum, blackthorn, bird cherry (common, late and virgin).

The life cycle of pucciniastrum spotted, like all rust fungi, is quite complex, consisting of several stages, in which different types of spores are formed. In spring, basidiospores infect young cones (as well as young shoots). The mycelium of the fungus grows along the entire length of the cone and grows into scales. On the outer surface of the scales (and under the bark of the shoots), pyknia are formed – structures responsible for fertilization. Pycniospores and a large amount of strong-smelling liquid are formed in them. It is assumed that this liquid attracts insects, which thereby participate in the process of fertilization (this is the case with a number of other rust fungi).

In summer, already on the inner surface of the scales, aetsia are formed – small formations that look like slightly flattened balls. They can cover the entire inner surface of the scales and thus prevent seed setting. The spores that form in the aetia (aeciospores) are released the following spring. It is this stage in the life of pucciniastrum that attracts the attention of lovers of “silent hunting”, because the cones strewn with rusty-brown grains look quite exotic.

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

The next stage of its life, pucciniastrum spotted, is already, for example, on bird cherry. Aetsiospores formed in spruce cones infect leaves, on the upper side of which purple or reddish-brown spots of an angular shape form (the affected area is always limited by leaf veins) with rusty-yellow convex spots in the middle – uredinia, from which urediniospores scatter. They infect the following leaves and this happens throughout the summer.

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

At the end of summer and autumn, more durable structures are formed – telia, which hibernate in fallen leaves. The spores that are released next spring from the overwintered telia are the same basidiospores that will populate the next generation of young spruce cones.

Pucciniastrum spotted (Pucciniastrum areolatum) sary sy famaritana

Pucciniastrum spotted is widely distributed in Europe, noted in Asia and Central America.

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