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Foliar quality of co-occurring mallee eucalypts: balance of primary and secondary metabolites reflects past growing conditions

Steinbauer, Martin J.; Wallis, Ian; Davies, Noel W.; Watson, Simon J.

Description

Foliar quality for herbivores is determined by the balance of primary and secondary metabolites which is dependent on leaf age which in turn is determined by the periodicity of flushing and the rate of abscission. We conducted a 10-month longitudinal study in northeastern Victoria, Australia, of the quality of fully expanded leaves of Eucalyptus gracilis, E. socialis, E. dumosa and E. incrassata. We measured N and available N (AvailN) as well as sideroxylonals and other formylated...[Show more]

dc.contributor.authorSteinbauer, Martin J.
dc.contributor.authorWallis, Ian
dc.contributor.authorDavies, Noel W.
dc.contributor.authorWatson, Simon J.
dc.date.accessioned2015-12-10T23:27:01Z
dc.identifier.issn0937-7409
dc.identifier.urihttp://hdl.handle.net/1885/68029
dc.description.abstractFoliar quality for herbivores is determined by the balance of primary and secondary metabolites which is dependent on leaf age which in turn is determined by the periodicity of flushing and the rate of abscission. We conducted a 10-month longitudinal study in northeastern Victoria, Australia, of the quality of fully expanded leaves of Eucalyptus gracilis, E. socialis, E. dumosa and E. incrassata. We measured N and available N (AvailN) as well as sideroxylonals and other formylated phloroglucinol compounds (FPCs) and related changes in concentration to tree phenology (flushing and flowering) and climatic conditions (temperature and rainfall). Concentrations of N, sideroxylonals and other FPCs differed significantly between species and with time as well as among trees within a species. AvailN also differed significantly between species and among trees within a species and with time for E. gracilis. Our analyses indicated that tree phenology affected N concentrations in E. gracilis only while climatic conditions affected N concentrations in E. gracilis, E. socialis and E. dumosa. Nitrogen concentrations in E. incrassata were unaffected by phenological or climatic factors. Tree phenology affected concentrations of sideroxylonals in E. gracilis and E. dumosa while climatic conditions affected concentrations of the same in E. socialis, E. dumosa and E. incrassata. The concentration of primary metabolites in expanded leaves of these eucalypts was relatively consistent compared to the concentration of quality reducing secondary metabolites which varied with the conditions experienced when leaves were expanding. Our results show that the foliar quality of leaves can be highly variable, with variations mediated by phenology and climate. These variations are likely to partially explain fluctuations in the abundance of chewing insect herbivores reliant on expanded leaves.
dc.publisherBirkhauser Verlag
dc.sourceChemoecology
dc.titleFoliar quality of co-occurring mallee eucalypts: balance of primary and secondary metabolites reflects past growing conditions
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume25
dc.date.issued2015
local.identifier.absfor060200 - ECOLOGY
local.identifier.absfor060800 - ZOOLOGY
local.identifier.ariespublicationa383154xPUB1596
local.type.statusPublished Version
local.contributor.affiliationSteinbauer, Martin J., La Trobe University
local.contributor.affiliationWallis, Ian, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationDavies, Noel W., University of Tasmania
local.contributor.affiliationWatson, Simon J., La Trobe University
local.description.embargo2037-12-31
local.bibliographicCitation.startpage179
local.bibliographicCitation.lastpage191
local.identifier.doi10.1007/s00049-015-0187-4
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2015-12-10T11:03:35Z
local.identifier.scopusID2-s2.0-84930572940
CollectionsANU Research Publications

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