Many hardy Asiatic and trumpet hybrids germinate this way, as do species lilies such as Lilium tigrinum, L.
Seed that is harvested early (before August) from lilies that germinate immediately, either above (epigeal) or below ground (hypogeal), should be sown at once to ensure bulb development before the onset of winter.
Also, since GA remains at undetectable levels in this breeding line (Honda et al., 1996) yet is able to germinate
to 95% anaerobically suggests that a-amylase is not activated by GA under anaerobic conditions.
Direct investigation of this issue is difficult, because comparing the performance of seeds in the field that germinate in different seasons may be confounded by the different biotic and abiotic environments each cohort would encounter.
Thus it is conceivable that the Lesquerella seeds that remain dormant throughout a particular germination period may differ ecologically and evolutionarily from the seeds that do germinate.
The seeds of these plants have a very thick seed coat, and the embryo is able to germinate only after scarification of the seed coat.
The seeds of the summer ecotypes germinate and the plants develop when the temperatures are high (27-32 [degrees] C) and day length is long (12.2-14 hours of light per day, during March to September).
Seeds don't do any good if they won't germinate. And each plant needs a unique combination of environmental conditions for its seeds to begin to grow.
Once Young gets a seed to germinate, ARS mathematician Debra E.
When he's tested samples in greenhouses, "they germinate
fantastically," von Willert says.
After treatments, the seeds were placed in Petri dishes of 90mm size with two layers of wet paper to germinate
in a Kryoven incubator (irradiance 142.7[micro]mol/[m.sup.2].s) at constant temperature (31[degrees]C) and a 12/12h photoperiod.
The seeds will germinate
and poke up leaves in about five days.