Differentiation in morphology and flowering phenology between two Campanula thyrsoides L. subspecies

Kuss, Patrick; Stöcklin, Jürg

doi:10.1007/s00035-011-0087-3

Cited by 13 publications

(14 citation statements)

References 40 publications

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“…C. thyrsoides is one of the few monocarpic perennials in the Alps. Plants produce a dense spike composed of 50-200 yellow and bellshaped protandrous flowers (Scheepens et al 2011). They die after the production of 15,000-50,000 tiny seeds with no morphological adaptations for dispersal.…”

Section: Study Species and Regionmentioning

confidence: 99%

Dispersal and microsite limitation of a rare alpine plant

Frei

Stöcklin

2011

Plant Ecol

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Knowledge on the limitation of plant species' distributions is important for preserving alpine biodiversity, particularly when the loss of alpine habitats because of global warming or land use changes is faster than colonization of new habitats. We investigated the potential of the rare alpine plant Campanula thyrsoides L. to colonize grassland sites of different suitability on a small mountain plateau in the Swiss Alps. A total of 15 experimental sites were selected according to their differences in habitat suitability for adult C. thyrsoides, which was measured by the Beals index. At each site we applied a disturbance treatment, added seeds at different densities and monitored the survival of seedlings over two consecutive years. The number of surviving seedlings was not positively related to habitat suitability for adult C. thyrsoides. Furthermore, C. thyrsoides appears to be strongly dispersal limited at the regional scale because seed addition to unoccupied habitats resulted in successful germination and survival of seedlings. Since an increase of seed density in already occupied sites did not affect the number of seedlings, we suggest that C. thyrsoides is microsite limited at the local scale. Microsite limitation is supported by the result that seedling survival of the species was enhanced in vegetation gaps created by disturbance. We conclude that C. thyrsoides may become endangered in the future if environmental changes cause local extinction of populations. An appropriate management, such as a disturbance regime for enhancing recruitment in existing populations, may ensure the long-term survival of this rare alpine plant species.

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Section: Study Species and Regionmentioning

confidence: 99%

Dispersal and microsite limitation of a rare alpine plant

Frei

Stöcklin

2011

Plant Ecol

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“…Natural selection then cannot operate on trait means as efficiently as when environments and phenotypes are stable, because the same genotype does not have highest fitness under all conditions (Via and Lande 1985). The question, whether mean flowering time is subject to divergent selection among populations in the highly variable alpine landscape remains rarely addressed (Scheepens et al 2011;Scheepens and Stöcklin 2013;Frei et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Past selection explains differentiation in flowering phenology of nearby populations of a common alpine plant

et al. 2015

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The timing of and relative investment in reproductive events are crucial fitness determinants for alpine plants, which have limited opportunities for reproduction in the cold and short growing seasons at high elevations. We use the alpine Anthyllis vulneraria to study whether flowering phenology and reproductive allocation have been under diversifying selection, and to assess genetic diversity and plastic responses to drought in these traits. Open-pollinated maternal families from three populations in each of two regions from the Swiss Alps with contrasting precipitation were grown in low and high soil moisture in a common garden. We measured onset, peak, and end of flowering, as well as vegetative and reproductive aboveground biomass. Population differentiation for each character (Q ST ) was compared to differentiation at neutral microsatellite loci (F ST ) to test for past selection. We found population differentiation in onset and peak of flowering which results from natural selection according to Q ST -F ST . End of flowering and biomass were not significantly differentiated among populations. Reduced soil moisture had no consistent effect on mean onset of flowering, and advanced peak and end of flowering by less than 1 week. Reproductive biomass was strongly decreased by lowered soil moisture. No genetic variation within or among populations was found for plasticity in any trait measured. The results suggest past heterogeneous selection on onset and peak of flowering in alpine Anthyllis vulneraria and potentially indicate local adaptation to differences in snowmelt date over distances \5 km. Limited variation in plastic responses to reduced soil moisture suggests that soil moisture might not vary between populations.

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“…Regarding to the implication of morphological variation on the infraspecific classification, the main criteria for recognition of subspecies is the coherence of morphology supported by solid association to geographical distribution (Scheepens et al, 2011;Swanepoel, 2012). When this criterion is not found in the observed samples or populations, then the infraspecific categories of subspecies could not be assigned.…”

Section: Discussionmentioning

confidence: 99%

ASSESSMENT OF TAXONOMIC AFFINITY OF INDONESIAN PUMMELO (<i>CITRUS MAXIMA</i> (BURM.) MERR.) BASED ON MORPHOLOGICAL CHARACTERS

Susandarini

Subandiyah

Rugayah³

et al. 2013

American Journal of Agricultural and Biological Sciences

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Citrus maxima is a tropical fruit species with high morphological variability on fruit characters, including shape, size, thickness of peel, flesh color and taste. This variability has been used by breeders and common people to practically distinguish different pummelo cultivars. Despite such well known variation, so far there is no published study specifically addressed the extent of phenotypic variability and taxonomy of pummelo in Indonesia. This study was, therefore, aiming at assessing phenotypic variability and taxonomic affinity of Indonesian pummelo cultivars and landraces using multivariate analysis methods. A total of 60 accessions from six provinces were collected, including some representatives of registered cultivars. Twenty one morphological characters were subjected to cluster analysis and principal component analysis. Results showed that two major clusters were formed, in which each group was characterized by combination of distinctive morphological features leading to recognition of two cultivar groups. Based on the fact that the morphology of individuals from intensively cultivated orchards showed similar level of variability to those from sporadically distributed areas, there was strong indication that the morphological variation has genetic background.

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Differentiation in morphology and flowering phenology between two Campanula thyrsoides L. subspecies

Abstract: Subspecies are usually characterised by sets of morphological discontinuities.

Cited by 13 publications

References 40 publications

Dispersal and microsite limitation of a rare alpine plant

Dispersal and microsite limitation of a rare alpine plant

Past selection explains differentiation in flowering phenology of nearby populations of a common alpine plant

ASSESSMENT OF TAXONOMIC AFFINITY OF INDONESIAN PUMMELO (<i>CITRUS MAXIMA</i> (BURM.) MERR.) BASED ON MORPHOLOGICAL CHARACTERS

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