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Studies on lettuce mosaic virus resistance in commercial lettuce cultivars (1985)

WALKEY, D. G. A. ; WARD, C. M. ; PHELPS, KATHLEEN

Oxford, UK : Blackwell Publishing Ltd

Plant pathology 34 (1985), S. 0

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ISSN: 1365-3059

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: The response to infection with lettuce mosaic virus (LMV) of 16 lettuce cultivars, known to possess the Momo gene for resistance to LMV, was studied in field trials over a 2-year period. Some cultivars developed negligible mosaic symptoms following virus inoculation and had a low virus content as measured by ELISA, while others had more severe symptoms and a higher virus content. Resistant cultivars differed significantly in the effect of LMV upon yield and the correlation between cultivar rankings for yield depression and symptom severity was low.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-3059.1985.tb01405.x

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Synthesis and Biological Evaluation of a Backbone-Modified Phytoalexin Elicitor (1997)

Timmers, C. M. ; Turner, J. J. ; Ward, C. M. ; [et al.]

Weinheim : Wiley-Blackwell

Chemistry - A European Journal 3 (1997), S. 920-929

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ISSN: 0947-6539

Keywords: bioorganic chemistry ; carbohydrates ; glycosides ; peptide bonds ; phytochemistry ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Two suitably protected building blocks (11 and 33) for the preparation of amide-linked heptaglucoside mimetic 2, an analogue of the naturally occurring phytoalexin elicitor 1a, were readily accessible by glycal chemistry. Sequential elongation of terminal glucuronide 21 with laminaribiosyl hemiaminal 33 and anomeric amine 11 by EDC/HOBt-catalyzed condensation and two-step conversion of the C6-OTr moiety into the corresponding carboxylate function afforded homogeneous carbopeptoid 2 in high overall yield. It was found that replacement of the acetal linkages by the more rigid amide bonds destroys the phytoalexin-elicitor activity.

Additional Material: 4 Ill.