Advances in Botanical Research by J. A. Callow

By J. A. Callow

This quantity of Advances in Botanical learn incorporating Advances in Plant Pathology comprises 5 stories on quite a few themes including:* Foliar Endophytes and Their Interactions with Host crops, with particular connection with the Gymnospermae* vegetation looking for sun* The Mechanics of Root Anchorage* Molecular Genetics of Sulphate Assimilation* Pathogenecity, Host-specificity, and inhabitants Biology of Taesia spp, Causal brokers of Eyespot affliction of Cereals

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The coniferous endophyte, Cryptosporiopsis abietina, on the other hand, displayed an overall susceptibility to the redwood essential oils (EspinosaGarda and Langenheim, 1991). -M. KRIEL, W. J. SWART and P. W. CROUS (b) Symptom expression elicited by environmental stress. A significant number of endophytic fungi in healthy plants become pathogenic when their host plants are weakened. In this instance the host-fungus interaction manifests itself as a disease syndrome (Dorworth and Callan, 1996). These fungi are often referred to as opportunists that may pass from a latent or mutualistic mode to a necrotrophic mode when the host plant is predisposed by several factors such as stress (Schoeneweiss, 1975).

1989). Sherwood and Carroll (1974) found parasitized needles were shed from trees prematurely, because results showed a drop in the infection frequencies in needles from old-growth (7-8 years) of Douglas fir; 4-5 yearold needles were most severely infected. Overall intensity of infection did not, however, increase with age or canopy level (Sherwood and Carroll, 1974). , 1993a). More endophytes were isolated from the bottom of the crown in A. balsamea than from the top, but no correlation could be found between the frequency of infections by endophytes and the geographic directional orientation of needles (Johnson and Whitney, 1989).

S. (1974). Decomposition of Coniferous leaf litter. In "Biology of Plant Litter Decomposition, Volume I" (C. H. Dickinson and G. J. F. Pugh, eds), pp. 105-128. Academic Press, London. Noble, H. , Sidebottom, P. , Lane, S. J. and Fisher, P. J. (1991). An echinocandin from an endophytic Cryptosporiopsis sp. and Pezicula sp. in Pinus sylvestris and Fagus sylvatica. Mycological Research 95, 1439-1440. Petrini, 0. (1984). Endophytic fungi in British Ericaceae: A preliminary study. Transactions. British Mycological Society 83, 510-512.

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