Seed dormancy and germination of three Corydalis species, disjunct relict species in East Asia.
Kim CW, Walck JL, Hidayati SN, Ko CH, Rhie YH
Seed Saving
Fumeworts are increasingly coveted spring ephemerals for shade gardens, and cracking their germination has stumped growers for years — this research reveals they need a warm period before cold stratification, not cold alone, which is why seeds tossed straight in the fridge so rarely work.
Fumeworts (Corydalis) are delicate spring wildflowers whose seeds have tiny, unfinished embryos when they fall from the plant. Those embryos need to slowly develop through an autumn warm spell and then a cold winter before the seedling can emerge — a built-in delay that times sprouting perfectly for early spring. Scientists found this two-stage requirement is shared across the whole genus worldwide, even though different species have tuned exactly how much warmth or cold they need to match their local climate.
Key Findings
All three species had underdeveloped embryos at seed dispersal and exhibited morphophysiological dormancy (MPD), confirming MPD is conserved across the Corydalis genus despite long-term geographic separation.
C. remota and C. incisa require warm-then-cold temperature sequences for germination and could not be shortcut with gibberellic acid (GA3), classifying them as deep simple regular MPD.
C. speciosa germinated under cold conditions alone (non-deep complex regular MPD), but germination was enhanced by prior warm exposure — showing diversification in dormancy depth even within the same dormancy class.
chevron_right Technical Summary
Three Korean fumewort species (Corydalis) share the same class of seed dormancy — requiring specific sequences of warm and cold temperatures before germinating — and this dormancy type has been preserved across the genus even after long geographic separation, though the precise temperature triggers differ by species.
Abstract Preview
Disjunct congeneric species are common in the temperate flora of Europe, East Asia and eastern North America. However, it is unclear whether the kind of seed dormancy is maintained after divergence...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Urban Tree Canopy Reduces Heat-Related Mortality by 39% in European Cities
Trees in your local park or street aren't just pretty — they are literally keeping people alive during heatwaves, and planting even a modest number of the ri...
Phenology is the study of recurring biological events in plant life cycles—such as flowering, fruiting, and germination—and how these events are timed in response to seasonal and climatic conditions. This research is essential to plant science because phenological patterns directly influence
arrow_forward Explore topic