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dc.contributor.authorAdhikari, Subodh
dc.contributor.authorRussell, F. Leland
dc.identifier.citationAdhikari, Subodh; Russell, F. Leland. 2014. Effects of apical meristem mining on plant fitness, architecture, and flowering phenology in Cirsium altissimum (Asteraceae). American Journal of Botany, vol. 101:no. 12:pp 2079-2087en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractPremise of the study: Interactions that limit lifetime seed production have the potential to limit plant population sizes and drive adaptation through natural selection. Effects of insect herbivory to apical meristems (apical meristem mining) on lifetime seed production rarely have been quantified experimentally. We studied Cirsium altissimum (tall thistle), whose meristems are mined by Platyptilia carduidactyla (artichoke plume moth), to determine how apical damage affects plant maternal fitness and evaluate both direct and indirect mechanisms underlying these effects. Methods: In restored prairie, apical mining was manipulated on tall thistles by applying insecticide, water, or no spray to apical meristems. We quantified effects on lifetime seed production, plant architecture, and flowering phenology. Seed germinability and seedling mass were evaluated in a greenhouse. Key results: Apical meristem miners decreased lifetime seed production of C. altissimum, but not seed quality. Higher mortality rates of damaged plants contributed to reduced seed production. Apical damage reduced plant height and increased the proportion of blooming flower heads in axial positions on branches. Apical damage delayed flowering and shortened flowering duration. Conclusions: Apical meristem mining reduced plant maternal fitness. The shift in the identity of blooming flower heads from terminal to axial positions contributed to this reduction because axial heads are less fecund. Shorter, meristem-mined plants may have been more susceptible to competition, and this susceptibility may explain their higher mortality rates. The kinds of changes in architecture and phenology that resulted from apical damage to C. altissimum have been shown to affect floral visitation in other plant species.en_US
dc.publisherAmerican Journal of Botany, Inc.en_US
dc.relation.ispartofseriesAmerican Journal of Botany;v.101:no.12
dc.subjectApical meristem miningen_US
dc.subjectCirsium altissimumen_US
dc.subjectFlowering phenologyen_US
dc.subjectInsect herbivoryen_US
dc.subjectPlant architectureen_US
dc.subjectPlant fitnessen_US
dc.subjectReproductive successen_US
dc.titleEffects of apical meristem mining on plant fitness, architecture, and flowering phenology in Cirsium altissimum (Asteraceae)en_US
dc.rights.holderCopyright © 2015 by American Journal of Botany, Inc.

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