The role of spontaneous selfing in the pioneer species Saxifraga aizoides

Raffl, Corinna; Marcante, Silvia; Erschbamer, Brigitta

doi:10.1016/j.flora.2006.05.002

Cited by 13 publications

(9 citation statements)

References 34 publications

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“…Self‐pollen deposition on stigmas preceding cross‐pollen deposition might be detrimental to maximal seed set. Pollen delivery does not seem to limit the seed set in contrast to what is often claimed for alpine areas (Molau 1993; Blionis & Vokou 2005; Raffl et al. 2007).…”

Section: Discussioncontrasting

confidence: 62%

Comparisons of breeding systems between two sympatric species, Nastanthus spathulatus (Calyceraceae) and Rhodophiala rhodolirion (Amaryllidaceae), in the high Andes of central Chile

Ladd

Arroyo

2009

Plant Species Biology

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Ladd, P.G. and Arroyo, M.T.K. (2009)Comparisons AbstractAlpine vegetation occurs over a wide range of ecological conditions. Thus, the breeding systems of alpine plants are likely to be diverse and vary from one geographical area to another. The reproductive characteristics of Nastanthus spathulatus (Calyceraceae) andRhodophiala rhodolirion (Amaryllidaceae), species with contrasting floral morphology, were studied in the high Andes of Chile, which has a Mediterranean-type climate. Natural and supplemental open pollination, and cross pollination and self-pollination trials were carried out in the field. Flower visitors were quantified by field and video observations. Both species had high outcrossing properties, and Nastanthus was strongly self-incompatible. Rhodophiala could form some seed by self-pollination, but fruit and seed sets were much lower after selfpollination compared with outcrossing. The phenology and flower/inflorescence forms of these species supported the view that alpine flowers are comparatively long lived and that the floral display contributes to a large proportion of the plant biomass. Rhodophiala was well attended by a native bee species (Megachile sauleyi) that was appropriately sized for efficient pollination. Although no flower visitors were observed on Nastanthus and wind pollination was discarded experimentally, a high proportion of the flowers produced seeds under natural pollination. Therefore, the seed set was not severely pollen limited in these species. Including previously published information, breeding systems are now known for 12 species on thisMediterranean alpine site and current knowledge suggests an emphasis on outcrossing breeding systems.

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Section: Discussioncontrasting

confidence: 62%

Comparisons of breeding systems between two sympatric species, Nastanthus spathulatus (Calyceraceae) and Rhodophiala rhodolirion (Amaryllidaceae), in the high Andes of central Chile

Ladd

Arroyo

2009

Plant Species Biology

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“…In Saxifraga oppositifolia L., for instance, warmer conditions lengthen the flowering period, thus driving inter‐individual flowering asynchrony (Stenström, Gugerli & Henry 1997). Moreover, facultative self‐compatibility is common among highland Saxifraga species, which further assures reproductive process when outcrossing fails (Vargas 1994; Raffl, Marcante & Erschbamer 2007). Regarding viability of seeds, improved germinability of highland seeds may also be the consequence of higher rates of outbreeding due to flowering synchrony or to more efficient pollinator activity.…”

Section: Discussionmentioning

confidence: 99%

Intra‐ and interspecific performance in growth and reproduction increase with altitude: a case study with two Saxifraga species from northern Spain

et al. 2009

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Summary1. Improving our knowledge on plant functions underlying shifts in species ranges along altitudinal and latitudinal gradients is a research priority to understand biotic responses to climate change. Although much is known about biological responses to elevation, coupled observations of ecophysiological and reproductive traits with whole-plant performance metrics are rare, and thus our understanding disjunct rather than holistic. 2. We expected growth and reproductive performance to decrease with elevation, irrespective of adjustments in traits, modifications in allocation, or congeneric shifts in populations. To test this hypothesis we assessed growth, reproductive investments and traits related to resource use efficiency and reproductive success in populations of two vicariant species growing along an elevation gradient: Saxifraga trifurcata (lowland species) and S. canaliculata (highland species). 3. For most metrics, a relationship with elevation arose, mostly related to the replacement of species, but also to within-species variation in S. trifurcata . Leaves of S. canaliculata , and of the higher populations of S. trifurcata , were denser, had lower specific leaf area (SLA) and lower N concentration but higher N resorption efficiency. Collectively, these trends indicate a more conservative resource use pattern at the highlands as compared to the lowlands. Despite this, vegetative growth per unit canopy area was higher in S. canaliculata than in S. trifurcata , and in the highland than lowland populations of S. trifurcata . Reproductive investments, measured as the reproductive mass per unit canopy area, were lower, and reproductive maturity was reached later, in S. canaliculata , but reproductive success (fruit set and seed germination) increased at the high altitude limit of each species' range. 4. Performance did not uniformly decrease with altitude. Growth was higher in the uplands possibly because preferential biomass and meristem allocation to the vegetative function compensated for the decrease in growth season length. Similarly, the decrease in reproductive investments in the highland populations was partially compensated for, since fruit set was higher and more viable seeds (per gram invested in reproduction) were produced in the highland limit of each species. 5. This suggests that populations growing in increasingly limiting environments can partially compensate by modifications in allocation and morpho-functional traits.

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“…As most seeds are deposited in the immediate surrounding of the mother plant, this direct diaspore input is by far more effective than long distance dispersal (Stöcklin & Bäumler, 1996;Tackenberg & Stöcklin, 2008). In addition, the ability for self-pollination of many taxa enhances the reproductive success, even though at the expense of genetic variability (Raffl, Marcante, & Erschbamer, 2007).…”

Section: Trisetum Spicatummentioning

confidence: 99%

High‐speed colonization of bare ground—Permanent plot studies on primary succession of plants in recently deglaciated glacier forelands

Fickert

Grüninger

2018

Land Degrad Dev

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Glacier forelands are highly suitable environments to study vegetation dynamics. Due to time constraints, the method of ‘space for time substitution’ is commonly employed, using spatially different sites to reconstruct a temporal sequence. However, migration patterns, growth performance, shifts in frequency or abundance of species, changes in biological traits, setbacks, etc. can only be detected by long‐term monitoring on permanent plots. In 2005, a set of permanent plots were established immediately in front of two glacier termini in the European Alps (Goldbergkees, Austria; Lenksteinferner, Italy), which were revisited every second year thereafter. Changes in ground cover and individual numbers of vascular plants as well as structural features such as life‐form composition and dispersal biology types are recorded. The six visits between 2005 and 2015 allow for a detailed appraisal of early vegetation development in glacier forelands, which is surprisingly swift and primarily progressive, but locally interrupted by temporary setbacks due to disturbances. This study contributes to a better understanding of high alpine vegetation dynamics in paraglacial landscapes, that is, transitional landscapes characterized by particular rate and direction of change.

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The role of spontaneous selfing in the pioneer species Saxifraga aizoides

Cited by 13 publications

References 34 publications

Comparisons of breeding systems between two sympatric species, Nastanthus spathulatus (Calyceraceae) and Rhodophiala rhodolirion (Amaryllidaceae), in the high Andes of central Chile

Comparisons of breeding systems between two sympatric species, Nastanthus spathulatus (Calyceraceae) and Rhodophiala rhodolirion (Amaryllidaceae), in the high Andes of central Chile

Intra‐ and interspecific performance in growth and reproduction increase with altitude: a case study with two Saxifraga species from northern Spain

High‐speed colonization of bare ground—Permanent plot studies on primary succession of plants in recently deglaciated glacier forelands

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