Puccinia hordei

Puccinia hordei

Puccinia hordei is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of milk stars, two-leaf and barley. Symptoms of infestation by the way are yellow rust spots and pustules on the leaf surfaces of host plants. The distribution area includes the entire temperate zones of the world.

Features

Macroscopic characteristics

Puccinia hordei, with the naked eye to see only with reference to the protruding on the surface of host spores bearings. They grow in clusters that appear as yellowish to brown spots and pustules on the leaf surfaces.

Microscopic features

The mycelium of Puccinia hordei growing intercellular like all Puccinia species and forms Saugfäden which grow in the tissue of the host memory. Your Pyknien are only honey color, almost black, and later grow on both leaf surfaces. Your spermatia are hyaline and 3-4 × 1.5-2 microns in size. The Aecien are open spherical and only holes shaped. They have roundish to ellipsoidal aecidiospores 18-30 × 18-30 microns, which are hyaline and finely verrucose. The uredia grow leaf upper side and are orange to rust colored. Your uredospores are mostly globose to ellipsoid, 20-30 × 17-22 microns in size and easy stachelwarzig. The Telien the way are small, point-like and black. The teliospores are one-to two-celled, variable in shape and 24-73 × 40-60 microns in size. They are brown, its stem is short.

Dissemination

Puccinia hordei has a distribution area, which extends over the entire temperate zones of the northern and southern hemispheres.

Ecology

The host plants of Puccinia hordei are as Haplont milk Star ( Ornithogalum spp.) And tail blade ( Ornithogalum serotinum ) and barley (Hordeum spp. ) For the dikaryotic. The fungus feeds on the present in storage tissues of the plant nutrients, its spores bearing later break through the leaf surface, and put spores free. The type has a development cycle with Pyknien, uredia, Telien and aecia.