Pocket rot

Types of Decay. As shown in Figure 3, wood decay fungi can be divided into three classes based on the type of decay they cause white, brown, and soft rots. The white rots can be further separated into pocket rots and uniform rots (Figure 3). In North America, the white and brown rots are caused by about 1700 species of wood-decaying fungi in the class Basidiomycetes over 90% of these cause the white rot type of decay (67). Early reports of non-basidiomycete... 

Hyphae colonize lumens of cells, penetrate first from cell to cell via pits, later directly via bore holes progressive decay observed as thinning of cell walls (in pocket rots, decay is limited to the developing pockets)... 

Samples of silicified Triassic Period gymnosperms from Antarctica have been reported with evidence of a white pocket rot (24). The decayed silicified... 

Brown rots may be extremely covert because of the nature of assimilation. Pocket and dry rot typically exist in core material or adjacent to protective surfaces. In pocket rots, an elevated moisture content (the product... 

Phellinus pini is the most economically important conifer decay fungus which causes white pocket rot in many species of pine. Antagonism between P. pini and several other wood pathogens have been reported. When the fungus was grown in liquid medium several aromatic and benzoquinone metabolites were isolated of which 4-hydroxystyrene (33) and the pentaenone 35 showed activity against... 

PI. 3.IB Mouse chemosignal complex, ligand + urinary protein location of 2-jeobutyl-4,5-dih yd rot hi azole (DHT) within the binding pocket at the N-terminus (lower) in MUP (from Tirindelli et ai, 1998). 

The type of root system developed by a plant depends not only on soil tilth but also on the level of nutrients present. The root system tends to be more branched and more concentrated in a fertile soil than in a poor one. If a poor soil is fertilized with well-rotted manure, for example, each pocket of manure will be filled with a mass of much-branched roots, whereas the remainder of the soil will have few roots other than the larger primary and secondary ones. Undoubtedly this extreme development of fine roots in manure is a response to chelated minor elements as well as to the major nutrients. If a poor soil is not fertilized with either chemical fertilizers of manure the top—root ratio is likely to be unusually narrow, and the roots may extend to deeper depths (Oswalt et al., 1959). We sometimes say that such roots are long because they are searching for nutrients, but the real explanation is that the carbohydrate level in the root increases as the available nutrient supply decreases. When the nutrients are inadequate for a luxuriant top growth there is a bigger excess of carbohydrates that are transported downward and used for root growth. Inadequate soil moisture in the upper part of the soil profile may also result in a deeper root system. 

Table 8.8 Ihe overlap between the yeast found in slime fluxes and rot pockets with those found in the guts of Drosophila that breed in those substrates in Tucson, AZ (Ganter et al.,...

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