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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/56407
Title: Effects of phosphorus availability and genetic variation of leaf terpene content and emission rate in Pinus pinaster seedlings susceptible and resistant to the pine weevil, Hylobius abietis
Authors: Blanch, J.; Sampedro, L.; Llusia, Joan; Moreira Tomé, X.; Zas Arregui, Rafael; Peñuelas, Josep
Issue Date: 2012
Publisher: Thieme
Citation: Plant Biology 14: 66- 72 (2012)
Abstract: We studied the effects of phosphorus fertilisation on foliar terpene concentrations and foliar volatile terpene emission rates in six half-sib families of Pinus pinaster Ait. seedlings. Half of the seedlings were resistant to attack of the pine weevil Hylobius abietis L., a generalist phloem feeder, and the remaining seedlings were susceptible to this insect. We hypothesised that P stress could modify the terpene concentration in the needles and thus lead to altered terpene emission patterns relevant to plant-insect signalling. The total concentration and emission rate ranged between 5732 and 13,995οg·g -1DW and between 2 and 22οg·g -1DW·h -1, respectively. Storage and emission were dominated by the isomers α- and β-pinene (77.2% and 84.2% of the total terpene amount amassed and released, respectively). In both resistant and susceptible families, P stress caused an increase of 31% in foliar terpene concentration with an associated 5-fold decrease in terpene emission rates. A higher terpene content in the leaves implies that the 'excess carbon', available under limiting growth conditions (P scarcity), is allocated to terpene production. Sensitive families showed a greater increase in terpene emission rates with increasing P concentrations, which could explain their susceptibility to H. abietis. © 2011 German Botanical Society and The Royal Botanical Society of the Netherlands.
URI: http://hdl.handle.net/10261/56407
DOI: 10.1111/j.1438-8677.2011.00492.x
Identifiers: doi: 10.1111/j.1438-8677.2011.00492.x
issn: 1435-8603
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