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4 results for “Conospermum undulatum”
Data from: Floral display and habitat fragmentation: effects on the reproductive success of the threatened mass-flowering Conospermum undulatum (Proteaceae)
1. Fragmentation of natural vegetation is currently one of the largest threats to plant populations and their interactions with pollinators. Plant reproductive susceptibility to habitat fragmentation has been investigated in many species; however, the response of wild mass-flowering species is poorly known, with research limited to mainly boreal plant species. 2. Here we studied twelve remnant populations of the threatened mass-flowering shrub Conospermum undulatum in the southwest Australian biodiversity hotspot, each presenting different population size, level of isolation, and floral display. We assessed the impact of fragmentation on: 1) fruit and seed production; and 2) seed germination. To gain a deeper understanding of factors influencing the reproductive success of C. undulatum we performed pollinator exclusion and self-pollination treatments to experimentally assess the mating system of this threatened shrub. 3. We found C. undulatum to be strictly self-incompatible and totally reliant on pollinators visiting with an outcrossed pollen load to complete the reproductive cycle. Further, we found that fruit production significantly decreased with decreasing floral display. A decrease in population size and floral display led to a decrease in seed output, while increasing isolation also led to a reduced production of seeds. Overall, seed germination was positively related to population size, and a negative relationship was found between germination and isolation. 4. Our results demonstrate the important relationship between pollinators and floral morphology in plants of southwest Australia that have coevolved with native pollinators and developed characteristic flower morphologies over long timeframes. The self-incompatible C. undulatum cannot rely on its mass-flowering trait to attract pollinators from co-flowering species, neither can it compensate for the lack of visitors by promoting geitonogamy. Consequently, fragmentation has a significant effect on the reproductive output of C. undulatum, and size, isolation, and floral display of populations should be considered when planning conservation actions for the species.
Data from: Isolation, characterization, and cross-amplification of 20 microsatellite markers for the rare Conospermum undulatum (Proteaceae)
Premise of the study: Recent habitat fragmentation is posing a risk to the wavy-leaved smokebush, Conospermum undulatum, a rare plant species endemic to the south-western Western Australia. Microsatellites markers are required to characterize the genetic diversity and structure of the species for conservation purposes and to facilitate ecological studies. Methods and Results: Illumina MiSeq high-throughput sequencing was used to develop 20 novel microsatellite markers for C. undulatum. Polymorphism at each locus was assessed using 72 individuals from three natural populations. Nineteen markers were polymorphic, with the number of alleles per locus ranging from two to 21, and observed and expected heterozygosity ranging from 0.000 to 1.000 and 0.117 to 0.919, respectively. All markers successfully amplified in three congeneric species. Conclusions: The microsatellite markers will be useful for revealing patterns of genetic diversity, dispersal dynamics and hybridization events for C. undulatum to inform future conservation efforts.
Data from: Floral display and habitat fragmentation: effects on the reproductive success of the threatened mass-flowering Conospermum undulatum (Proteaceae)
Open the record for dataset details and reuse information.
Data from: Isolation, characterization, and cross-amplification of 20 microsatellite markers for the rare Conospermum undulatum (Proteaceae)
Open the record for dataset details and reuse information.
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