Advances in Botanical Research by J. A. Callow

By J. A. Callow

This quantity of Advances in Botanical learn incorporating Advances in Plant Pathology contains 5 reports on numerous themes including:* Foliar Endophytes and Their Interactions with Host crops, with particular connection with the Gymnospermae* crops looking for solar* 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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Fitt, B. D. , Mccartney, H. A. and Walklate, P. J. (1989). Annual Review of Phytopathology 27, 241-270. Gange, A. C. (1996). Positive effects of endophyte infection on sycamore aphids. Oikos 75, 500-510. Hallmann, J. and Sikora, R. A. (1996). Toxicity of fungal endophyte secondary metabolites to plant parasitic nematodes and soil-borne plant pathogenic fungi. European Journal of Plant Pathology 102, 155-162. , Butin, H. and Donaubauer, E. (1993). Endophytische pilze in blattern und zweigen von Quercus petraea.

Persistence of endophytic fungal mycelia originating from latent infections in decomposing tissues will depend on their ability to utilize changing energy and nutrient sources, tolerate changing microclimatic conditions, and to defend their territory against invasions by other primary or secondary colonizers (Boddy and Griffith, 1989). Leaf senescence is the process which precedes tissue death, and during which the photosynthetic activity in leaves stops and leaf constituents are broken down and recycled within the host plant (Wilson, 1993).

These methods reduce pathogen populations by eliminating nutritional bases, negatively affecting environmental conditions, or by promoting the development of antagonistic microflora. The same principles can be applied to vegetation management (Dorworth and Callan, 1996). In biocontrol, the balance is tipped towards the pathogen, by strengthening the pathogen or weakening the host. Two benefits in the use of indigenous fungi for biocontrol are operator control, where the operator can limit the reaction by controlling the application of a stress factor quantitatively or qualitatively, and thereby reducing host vigour, and the buffer reaction or natural sink rendered by the natural biosphere.

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