Cowslip flower types diverge in germination rates and stress tolerance
Florianová A, Dostálek T, Do H, Plue J, Aavik T
Native Plants
Which cowslip flower type you collect seed from affects how well those seeds sprout, and because the two types respond to fertilizer and competition in opposite ways, a single management decision can quietly shift which type dominates your meadow planting over time.
Cowslips come in two flower types that need each other to set seed, but they aren't equal in other ways. Seeds from the shorter-styled flowers sprouted more reliably than seeds from the longer-styled ones. Under stress, the two types also responded differently to added nutrients and competing plants nearby, so changes in how land is managed can quietly favor one type over the other.
Key Findings
Seeds from S-morph (thrum) mothers germinated at significantly higher rates than seeds from L-morph (pin) mothers across 30 semi-natural grassland populations
Seed production was similar between morphs but was higher in fragmented habitats, possibly because lower plant species richness reduces competition for pollinators
S-morphs responded positively to fertilization regardless of competition, while L-morphs only benefited from fertilization when grown without competing plants
chevron_right Technical Summary
Cowslip primroses have two flower types that depend on each other to reproduce, but this study found they differ in germination and stress responses. Seeds from the shorter-styled morph sprouted more reliably, and the two types responded in opposite ways to fertilizer and competition, meaning land-use changes can shift which type dominates a population over time.
Abstract Preview
Original paper
Floral morphs of a heterostylous grassland herb differ in responses to grassland fragmentation and environmental pressures.
Semi-natural grasslands represent biodiversity hotspots but face increasing threats from habitat fragmentation, land-use intensification, and climate change, which disrupt ecological interactions a...
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Grassland ecology is the study of the structure, function, and dynamics of grassland ecosystems, including the interactions between plants, soils, climate, and other organisms. For plant science, it provides critical insights into how grasses and forbs adapt to disturbance regimes such as fire,
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