Download Advances in Downy Mildew Research by P.T.N. Spencer-Phillips, U. Gisi, A. Lebeda PDF

By P.T.N. Spencer-Phillips, U. Gisi, A. Lebeda

P. T. N. SPENCER-PHILLIPS Co-ordinator, Downy mould operating team of the foreign Society for Plant Pathology collage of the West of britain, Coldharbour Lane, Bristol BS16 1QY, united kingdom e-mail: it's a very nice privilege to jot down the preface to the 1st expert publication on downy mildews because the significant paintings edited by way of D. M. Spencer in 1981. the belief for the current booklet arose from the Downy mold Workshop on the foreign Congress of Plant Pathology (ICPP) held in Edinburgh in August 1998. Our purpose used to be to ask studies on chosen features of downy mold biology from foreign specialists, and hyperlink those to a chain of similar brief contributions reporting new information. No try out has been made to hide the breadth of downy mold study, yet we are hoping that extra issues could be integrated in destiny volumes, in order that this turns into the 1st of a sequence following the 5 yr ICPP cycle.

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Thus, as a result of continental drift, by the end of the Cretaceous there would have been a more or less continuous band of tropical forest (with rain forest in western South America and South East Asia), isolated from the high latitude land by hot deserts on the Tropic of Cancer to the north, and the Tropic of Capricorn to the south. The southern deserts on both the American and African sides of the South Atlantic Ocean isolated the high latitude, warm temperate Gondwanaland flora from the equatorial forest.

C. Magarey, Bureau of Sugar Experiment Stations, Queensland) that Pachymetra occurs in the native Queensland panicoid grass, Imperata cylindrica var. major (Blady Grass). The absence of any associations with southern temperate grasses makes it unlikely that there was early evolution of these graminicolous fungi from Gondwanaland, which would have required isolated, three-pronged migration and evolution in Africa, India, and Australasia (but not southern South America). A centre of radiation from Africa (Williams, 1984) or India could only be supported if the Sclerosporales are considered to be of late Neogene (Miocene - Pliocene) or Quaternary origin.

Isolated, provincial communities, recovering from the Cretaceous Terminal Event, could evolve independently, allowing for biodiversity in hosts, parasites and host-parasite relationships: speciation would be expected to show adaptive radiation. The probable time of origin, based on palynological and fossil evidence, for orders of interest from the point of view of the DM parasites are given in Dick (1988: fig. 7). , 1998a, b; APG, 1998): Ranunculales and Caryophyllales; Eurosids I (especially Fabales); Eurosids II (especially Brassicales) and the Euasterids (especially various orders in Euasterids I) (see Dick, 2001c and elsewhere in this volume).

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