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Leptosphaeria maculans (anamorph Phoma lingam) is a fungal pathogen of the phylum Ascomycota that is the causal agent of blackleg disease on Brassica crops. Its genome has been sequenced, [2] and L. maculans is a well-studied model phytopathogenic fungus.
Several black yeasts including Hormonema dematioides, Aureobasidium pullulans, Rhinocladiella atrovirens, and Phialophora species. Several dark molds such as Alternaria alternata, Cladosporium sphaerospermum and C. cladosporioides. Importance of the symbiotic relationship between blue stain fungi and bark beetles.
A sign of black dot disease is black microsclerotia that are produced by the pathogen, and can be found on the roots, the tuber, the stems, and the leaves. [3] This can be used to diagnose black dot. Symptoms of black dot disease include silvery lesions on the surface of the tuber, brown or black lesions on the leaves, leaf wilting, and ...
They are supported by the vegetative mycelium containing uni– (or mono–) nucleate hyphae, which are sterile. The mycelium containing both sterile and fertile hyphae may grow into fruiting body, the ascocarp, which may contain millions of fertile hyphae. An ascocarp is the fruiting body of the sexual phase in Ascomycota.
A special icing process applied to beech wood leads to results similar to those obtained with fungal decay. After the wood has been soaked, it is iced and then dried. The result is a very light wood with an almost black grain. This result, which also occurs very rarely in nature, is called ice-beech. [43] [44]
Spores are amyloid, meaning that they will absorb iodine and become bluish-black when stained with Melzer's reagent, [30] but this staining reaction has been described as "relatively weak". [ 1 ] The basidia (the spore-bearing cells) are 15–20 by 2.5–3.5 μm, club-shaped, and clamped at the base. [ 15 ]
Paint dots at head height mean the tree needs pruning. “Basically, it marks the tree in an inconspicuous way,” says Ken Fisher, assistant forester for the Boulder Parks and Recreation Department.
A strand or cord of mycelium, often with a dark-colored rind surrounding a central core of colorless cells, penetrating a soft substratum or between portions of it (e.g. between bark and wood). Unlike a mycelial cord, features distinct tissue, unlike "normal" hyphae. Functions as organ of absorption of nutritive substances.