Cellular and Molecular Aspects of Plant-Nematode by Peter C. Sijmons (auth.), C. Fenoll, F. M. W. Grundler, S.

By Peter C. Sijmons (auth.), C. Fenoll, F. M. W. Grundler, S. A. Ohl (eds.)

In 1992 a Concerted motion Programme (CAP) was once initiated via Peter Sijmons with the aim of intensifying collaborations among sixteen eu laboratories engaged on plant-parasitic nematodes. The four-year programme entitled `Resistance mechanisms opposed to plant-parasitic nematodes' occupied with molecular elements of the interplay among sedentary nematodes and vegetation at the version approach Arabidopsis and on novel resistance thoughts. investment was once supplied customarily for trade visits among participating laboratories and for the association of annual conferences. over the past annual assembly which used to be held in might 1996 in Toledo, Spain, Carmen Fenoll initiated the creation of this quantity. The e-book offers a sequence of updated studies, every one written by way of one of many partaking laboratories, which come with the clinical growth completed within the body of this cover yet are certainly not restricted in scope to this work.

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Below we briefly comment on the significance of our results for these two aspects of the interaction. The Arabidopsis root has a simple structure which allows descriptions of plantnematode interactions with cellular precision [7]. ; and Bleve-zacheo and Melillo, this volume). One possibility is that nematodes sense cell-specific molecules. Alternatively, nematodes could read the positional information that instructs root cell differentiation directly. In either case, we should like to know the identity of the relevant plant molecules.

Rawsthorne and Brodie [67] found that hatching of G. rostochiensis was positively correlated with increased root weight only during the first 3 weeks after plant emergence. Hatching factors are present in very low concentrations and Masamune [49] reported that those causing hatch of H. glycines were active at dilutions as low as 1O-14g ml- 1. Diluting PRD enhances its hatching activity, probably because the influence of hatching inhibitors is reduced. Hatching inhibitors may be important in novel control approaches but they have been investigated only to a limited extent.

PERRY Entomology and Nematology Department, IACR- Rothamsted, Harpenden, Hertfordshire, ALS 2JQ, UK Abstract Plant parasitic nematodes use plant signals (allelochemicals) to ensure close synchrony between host and parasite life cycles. The use by nematodes of plant signals is most extensively developed in the sedentary species, especially in relation to hatching and host location. There is also evidence that plant signals, acting via the feeding female, may influence the physiology of the developing juveniles.

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