Do variations in dormancy and germination across achenes from peripheral, intermediate and central positions contribute to the success of the cold desert annual Heteracia szovitsii?
Tag - physiological dormancy
William Salter
Dormancy and endosperm presence influence the seed longevity of central European calcareous grassland plants
Despite increasing efforts towards habitat and species protection in Europe since the 1990s, when the Fauna-Flora-Habitat directive was adopted, the proportion of threatened plant species has steadily increased. One...
Morpho-physiological dormancy described in seeds of waterlilies (Nymphaea)
Substantial evidence supports morpho-physiological dormancy (MPD) as the basal kind of seed dormancy in flowering plants. However, for seeds of waterlilies (Nymphaea, Nymphaeaceae), only physiological dormancy (PD) is...
Alex Assiry
This Carnivorous Plant Needs Its Home to Burn
Like the mythical Phoenix, the Portuguese Sundew is reborn from ashes, but that's a problem when people protect your habitat from flames.
Alun Salt
Breaking dormancy in Persoonia longifolia endocarps
Germination of species with hard woody indehiscent endocarps has troubled seed scientists for many years. To understand how germination is regulated in such species Chia et al. show that the conditions required for...
botanyone
Seed dormancy cycling and mortality in Arabidopsis thaliana
The contribution of variation in seed bank dynamics to local adaptation is not well studied. Postma et al. investigated the extent to which genetic and environmental factors affect dormancy cycling and mortality of...
Tumbleweed hedges its bets
A cold desert tumbleweed trades-off seed dispersal and dormancy.
AJ Cann
A soil heat sum model for predicting seed germination
The thermal requirements for seed dormancy release and germination of Rhamnus persicifolia, an endemic tree species restricted to mountain streams.
Prediction of seed germination time for wild grapevine
Thermal thresholds for seed dormancy release and germination are important tools for predicting germination timing. Orrù et al. study germination in seeds of Vitis vinifera subsp. sylvestris collected from four...
Parental environment and seed response to karrikinolide
Seeds from different populations of the same species often show distinct germination responses to the smoke-derived chemical karrikinolide (KAR1), thus limiting its potential for use in weed management. Gorecki et al...
Smoking out weeds with karrikinolide
Karrikinolide (KAR1) is a smoke-derived chemical that can trigger seeds to germinate, and shows promise as a tool for flushing out weed seeds from the soil seed bank. Long et al. demonstrate that weeds of Brassicaceae...
