Floral biology and breeding system of the narrow endemic Dianthus morisianus Vals. (Caryophyllaceae)

Nebot, Anna; Cogoni, Donatella; Fenu, Giuseppe; Bacchetta, Gianluigi

doi:10.1016/j.flora.2015.12.004

Cited by 10 publications

(14 citation statements)

References 54 publications

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“…Our study confirmed that D. morisianus is a self-compatible plant with a mixed mating system, as previously observed on ex situ cultivated plants (Nebot et al, 2016). In addition, the result corroborates the utility of breeding system studies on ex situ plants of narrow endemic plant species.…”

Section: Discussionsupporting

confidence: 90%

“…The results of the plants from natural population are in accordance with Husband and Schemske (1996), who indicated that inbreeding depression can be also found at the germination stage, and the current low values could be due to the purge of lethal and deleterious alleles. In addition, they support the results obtained in the ex situ experiment where D. morisianus presented inbreeding depression in seed germination speed (T50; Nebot et al, 2016). The results of inbreeding depression indicate that D. morisianus could be protected by the inbreeding depression generated by selfing.…”

Section: Discussionsupporting

confidence: 86%

“…These results were not caused by genetic incompatibility, as demonstrated by the geitonogamy treatment, but could be due to the low quantity and quality of pollen available when styles are receptive, as reported for Silene acutifolia (Buide and Guitián, 2002). In D. morisianus, pollen was exposed for three to five days until the styles reached their maturity (Nebot et al, 2016). In this case, dichogamy may reduce the capacity of self-pollination but cannot avoid it.…”

Section: Discussionmentioning

confidence: 64%

“…D. morisianus is a gynomonoecious plant that presents hermaphroditic and, in low frequency, female flowers. It is a self-compatible species, with mixed mating system (Nebot et al, 2016). The flowering season is from early May to late June, and ripe fruits can be found during June-July (Nebot et al, 2018).…”

Section: Plant Speciesmentioning

confidence: 99%

“…The aims of this study were to test the success of the first translocated population, improve the knowledge on the reproductive system of D. morisianus and its reproductive success to identify the potential biological factors that threaten this plant species. Previous studies analysed some characteristics of the breeding system of this species on ex situ cultivated plants (Nebot et al, 2016) and the flowering phenology (Nebot et al, 2018). However, the ability to autonomous selfpollination and the pollination vectors dependence have never been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Breeding system and inbreeding depression in a translocated population of the endangered plant Dianthus morisianus (Caryophyllaceae)

Nebot

Cogoni

Fenu

et al. 2020

Flora

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Know the breeding system of endemic plants is important to design conservation strategies. Translocations are actions to improve the survival prospects of the species, but nowadays there are only a few studies that analyse their success and make a comparison between translocation and the natural populations. Dianthus morisianus is a threatened narrow endemic plant species growing on sand dunes in SW Sardinia (Italy). The objective of this study was to assess the breeding system, the presence of inbreeding depression and pollen limitation, as well as the success of the plant translocation. All these results were compared with those from the single natural population. The breeding system was tested through five pollination treatments and the reproductive success was analysed by the fruit set, seed set, seed weight, germination and mortality rate. The translocated population behaved like the natural one on fruit and seed formation. Autonomous self-pollination was lower than the other treatments regarding fruit set and seed/ovule ratio in the two studied populations. The species is self-compatible and presents partial self-fertility. The selfing rate was higher in the translocated population and the inbreeding depression presented low values for the natural population, while the translocated population presented negative values. Neither of the populations suffered pollen limitation. The species did not present reproductive problems and it is pollinator dependent. Moreover, the translocated population demonstrated high success after five years, as an increase of the population area and new recruited plants was observed; the offspring were able to flower, fruiting and reproduce. This translocation success increases the survival prospects of the species.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 86%