Universidad Peruana Cayetano Heredia

Genetic variation in the reduction of attractive floral traits of an annual tarweed in response to drought and apical damage

Mostrar el registro sencillo del ítem

dc.contributor.author Gonzáles, Wilfredo L.
dc.contributor.author Suárez, Lorena H.
dc.contributor.author Gianoli, Ernesto
dc.date.accessioned 2019-02-22T14:54:30Z
dc.date.available 2019-02-22T14:54:30Z
dc.date.issued 2015
dc.identifier.uri https://hdl.handle.net/20.500.12866/5653
dc.description.abstract Foliar herbivory and water stress may affect floral traits attractive to pollinators. Plant genotypes may differ in their responses to the interplay between these factors, and evolution of phenotypic plasticity could be expected, particularly in heterogeneous environments. We aimed at evaluating the effects of simulated herbivory and experimental drought on floral traits attractive to pollinators in genetic families of the annual tarweed Madia sativa, which inhabits heterogeneous environments in terms of water availability, herbivore abundance and pollinator abundance. In a greenhouse experiment with 15 inbred lines from a M. sativa population located in central Chile (Mediterranean-type climate), we measured the effects of apical bud damage and reduced water availability on: number of ray florets per flower head, length of ray florets, flower head diameter, number of open flower heads per plant, flowering plant height and flowering time. Apical damage and water shortage reduced phenotypic expression of floral traits attractive to pollinators via additive and non-additive effects. Plants in low water showed decreased height and had fewer and shorter ray florets, and fewer and smaller flower heads. Damaged plants showed delayed flowering, were less tall, and showed shorter ray florets and smaller flower heads. The number of ray florets was reduced by damage only in the low water treatment. Plant height, flowering time and number of flower heads showed among-family variation. These traits also showed genetic variation for plasticity to water availability. Ray floret length, flower head size and time to flowering showed genetic variation for plastic responses to apical damage. Plasticity in flowering time may allow M. sativa to adjust to the increased aridity foreseen for its habitat. Because genetic variation for plastic responses was detected, conditions are given for evolutionary responses to selective forces acting on plastic traits. We suggest that the evolution of adaptive floral plasticity in M. sativa in this ecological scenario (heterogeneous environments) would result from selective forces that include not only pollinators but also resource availability and herbivore damage. en_US
dc.language.iso eng
dc.publisher Oxford University Press
dc.relation.ispartofseries Journal of Plant Ecology
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject herbivory en_US
dc.subject genetic variation en_US
dc.subject flower en_US
dc.subject phenotypic plasticity en_US
dc.subject water availability en_US
dc.title Genetic variation in the reduction of attractive floral traits of an annual tarweed in response to drought and apical damage en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1093/jpe/rtv080
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.10
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.13
dc.relation.issn 1752-993X


Ficheros en el ítem

Ficheros Tamaño Formato Ver

No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

info:eu-repo/semantics/restrictedAccess Excepto si se señala otra cosa, la licencia del ítem se describe como info:eu-repo/semantics/restrictedAccess

Buscar en el Repositorio


Listar

Panel de Control

Estadísticas