TY  - JOUR
AB  - Inbreeding and enemy infestation are common in plants and can synergistically reduce their performance. This inbreeding xenvironment (I x E) interaction may be of particular importance for the success of plant invasions if introduced populations experience a release from attack by natural enemies relative to their native conspecifics. Here, we investigate whether inbreeding affects plant infestation damage, whether inbreeding depression in growth and reproduction is mitigated by enemy release, and whether this effect is more pronounced in invasive than native plant populations. We used the invader Silene latifolia and its natural enemies as a study system. We performed two generations of experimental out- and inbreeding within eight native (European) and eight invasive (North American) populations under controlled conditions using field-collected seeds. Subsequently, we exposed the offspring to an enemy exclusion and inclusion treatment in a common garden in the species' native range to assess the interactive effects of population origin (range), breeding treatment, and enemy treatment on infestation damage, growth, and reproduction. Inbreeding increased flower and leaf infestation damage in plants from both ranges, but had opposing effects on fruit damage in native versus invasive plants. Inbreeding significantly reduced plant fitness; whereby, inbreeding depression in fruit number was higher in enemy inclusions than exclusions. This effect was equally pronounced in populations from both distribution ranges. Moreover, the magnitude of inbreeding depression in fruit number was lower in invasive than native populations. These results support that inbreeding has the potential to reduce plant defenses in S. latifolia, which magnifies inbreeding depression in the presence of enemies. However, future studies are necessary to further explore whether enemy release in the invaded habitat has actually decreased inbreeding depression and thus facilitated the persistence of inbred founder populations and invasion success.
DA  - 2019
DO  - 10.1002/ece3.4990
KW  - biological invasion
KW  - plant defense
KW  - evolution
KW  - genetic paradox
KW  - herbivory
KW  - inbreeding
KW  - purging
KW  - Silene latifolia
LA  - eng
IS  - 6
M2  - 3564
PY  - 2019
SN  - 2045-7758
SP  - 3564-3576
T2  - Ecology and Evolution
TI  - Release from natural enemies mitigates inbreeding depression in native and invasive Silene latifolia populations
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29350072
Y2  - 2024-11-22T11:40:24
ER  -