Show simple item record W. H. Gera en_US Mirka en_US Johannes A. en_US Ed en_US 2009-10-06T14:12:23Z 2009-10-06T14:12:23Z 2004-06-21 en_US
dc.identifier en_US
dc.identifier.citation Hol , W H G , Macel , M , van Veen , J A & van der Meijden , E 2004 , ' Root damage and aboveground herbivory change concentration and composition of pyrrolizidine alkaloids of Senecio jacobaea ' Basic and Applied Ecology , vol 5 , no. 3 , pp. 253-260 . , 10.1016/j.baae.2003.12.002 en_US
dc.identifier.other PURE: 121907 en_US
dc.identifier.other dspace: 2160/3160 en_US
dc.description.abstract Thus far not many studies focussed on how herbivory in one plant part affects plant defence in the other. The effects of root damage and a leaf-feeding herbivore (Mamestra brassicae) on pyrrolizidine alkaloid (PA) levels of Senecio jacobaea were investigated in a controlled environment. Three cloned S. jacobaea genotypes, which differed in PA concentrations, received four treatments: (1) no damage, (2) root damage (removing half of the root system), (3) shoot herbivory by M. brassicae larvae, (4) root damage and shoot herbivory. Shoot herbivory did not significantly affect shoot biomass, while root damage decreased both root and shoot biomass. Shoot herbivory decreased PA concentrations in the roots. Conversely, root damage increased PA concentrations in the roots. Alkaloid concentrations in the shoot showed a weak response to root damage, shoot herbivory had no effect on PA levels in the shoot. The effect of damage on the allocation of PAs to shoot and roots depended on genotype. One genotype allocated more PAs to the damaged site, another genotype did not change allocation and the third genotype allocated more PAs to the shoot if the roots were damaged. Changes in PA composition were observed in one genotype. Shoot herbivory increased erucifoline concentrations in the shoot and decreased concentrations of senecionine in the roots. In conclusion, we have shown that even in an alleged constitutively defended plant, damage of one compartment affects secondary metabolite level in the other. en_US
dc.format.extent 8 en_US
dc.relation.ispartof Basic and Applied Ecology en_US
dc.subject constitutive devence en_US
dc.subject aboveground and belowground interactions en_US
dc.subject erucifoline en_US
dc.subject induction en_US
dc.subject mamestra brassicae en_US
dc.title Root damage and aboveground herbivory change concentration and composition of pyrrolizidine alkaloids of Senecio jacobaea en_US
dc.contributor.pbl Aberystwyth University en_US
dc.contributor.pbl Institute of Biological, Environmental and Rural Sciences en_US

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