Changes in the Germinability of Buried Seeds of
Nightshade (Solanum nigrum L.)
Chin Jin Hou and Tauh-Shang Yen
Department of Agronomy, National Chiayi University,
Taiwan, R. O. C.
of this report was to study the annual changes in the germinability
of the buried seeds of nightshade grown in the dry farmland of Taiwan. The
seeds were collected in Chiayi and buried in the
upland soil of 10 cm in depth and exhumed monthly, for up to two years. The
exhumed seeds were then tested for germination under four different temperature
regimes or field soil of 0.3 cm in depth. The germination of buried seeds
incubated at 30/25, 25/20, 20/15, and 23/13℃ in light was high
except short treatment of seed buried being 33-66% of seed germination. The
seed buried in dark condition more than three months that appeared high
germination, therefore the seed of nightshade exhibited an annual non-dormancy.
However, these buried seeds incubated at 30/25, 25/20 and 23/13℃ in summer were low germination（38-60%）. This result is conjectured that the seed of nightshade exhibited
a conditional dormancy. The emergent rates of exhumed seed were not different
among seed sowed monthly. Two years measurement of nightshade seed emergence
showed that the buried seeds mostly germinated at the beginning of three months
after the burial treatment. These results of monthly plowing experiment
indicated nightshade seed could
germinate all year round.
words：conditional dormancy , temperature, nightshade, Solanum nigrum L., germination, seed.