Translocation of cyanogenic glycosides in rubber tree crown clones resistant to South American leaf blight

Genetic parameter estimations of three traits used to evaluate South American leaf blight (SALB) in rubber tree

Attack severity, sporulation intensity and stromata density are three symptoms of South American Leaf Blight caused by Microcyclus ulei (P. Henn.) v. Arx. evaluated in the field on one to three year-old rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.]. This genetic study under epidemiologic conditions of the Michelin plantation, Itiquira, State of Mato Grosso Brazil, used ...

Erasing the Past: A New Identity for the Damoclean Pathogen Causing South American Leaf Blight of Rubber

BACKGROUND South American leaf blight (SALB) of rubber has been the main constraint to production in its neotropical centre of origin since commercial plantations were first established. The fungal causal agent was identified and described more than a century ago but its precise placement within the Ascomycota still remains uncertain. Indeed, such is the ambiguity surrounding the pathogen that ...

Cyanogenic Glycosides in Plant Foods

Construction and analysis of a leaf cDNA library from cold stressed rubber tree clones

Background Rubber tree [Hevea Braziliensis (Willd. ex Adr. de Juss.) Muell-Arg.], a native species of the Amazon Rainforest in South America, belonging to the Euphorbiaceae family, is world’s major source of natural latex. Brazil, despite being the center of origin and diversity of the species and latex main producer at the end of XIX century, nowadays imports around 70% of the rubber consumed ...

Cyanogenic and non-cyanogenic glycosides from Manihot esculenta.

In addition to lotaustralin and linamarin, a novel cyanogenic glycoside, 2-((6-O-(beta-D-apiofuranosyl)-beta-D-glucopyranosyl)oxy)-2-met hylbutanenitrile , two novel non-cyanogenic glycosides, (2S)-((6-O-(beta-D-apiofuranosyl)-beta-D- glucopyranosyl)oxy)butane and 2-((6-O-(beta-D-apiofuranosyl)-beta-D-glucopyranosyl)oxy)propane, and a simple non-cyanogenic glycoside, ethyl beta-D-glucopyranosid...