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J. Pritchard | 1996The aim of the present study was to quantify osmotic pressures directly in the translocation pathway, from leaf to growing root tip, in order to understand the forces driving solutes from a source to a sink. Solutes move through the translocatio[...]
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D. Tomos ; J. Pritchard | 1994The endogenous regulation of the extension of cells and tissues appears to be dominated by cell wall mechanics. By simultaneously measuring growth rate at near-single cell resolution and single cell turgor pressure we have begun to chart the beh[...]
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K. Ponder ; J. Pritchard ; R. Harrington ; J. Bale | 2000Effects of nitrogen deficiency in hydroponically grown barley seedlings (Hordeum vulgare L.) on the development and reproduction of the aphid Rhopalosiphum padi (L.) (Hemiptera: Aphididae) were investigated. Plant growth was significantly reduce[...]
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V. Yokoyama ; J. Pritchard | 1984
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K. Ponder ; J. Pritchard ; R. Harrington ; J. Bale | 2001Electrical penetration graphs (EPGs) were used to examine the probing behaviour of adult apterous Rhopalosiphum padi (Linnaeus) on barley seedlings grown under conditions of nitrogen or water stress. Aphids took significantly longer to reach and[...]
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T. Wilkinson ; D. Ashford ; J. Pritchard ; A. Douglas | 1997Pea aphids, Acyrthosiphon pisum, containing their symbiotic bacteria (untreated aphids) and experimentally deprived of their bacteria by treatment with the antibiotic rifampicin (antibiotic-treated aphids) were reared on the plant Vicia faba, Th[...]
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V. Yokoyama ; J. Pritchard ; R. Dowell | 1984
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C. Doeringsaad ; H. Newbury ; J. Bale ; J. Pritchard | 2002Unmodified samples of barley (Hordeum vulgare) sieve tube sap have been obtained by severing the stylets (stylectomy) of feeding aphids and collecting the exuding liquid. Primers were designed to direct the amplification of a series of specific [...]
