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THE LIGHT FACTOR IN THE GERMINATION ECOLOGY OF DRABA VERNA
Author(s) -
Baskin Jerry M.,
Baskin Carol C.
Publication year - 1972
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1972.tb10149.x
Subject(s) - germination , biology , darkness , moisture , spring (device) , agronomy , botany , meteorology , mechanical engineering , physics , engineering
The majority of the seeds of the winter annual Draba verna L. require light for germination, but light can be given before they are fully after‐ripened and as long as 4 months before temperature and moisture conditions are favorable for germination. Seeds that are exposed to light in late spring, or in late spring and early summer, and then removed to darkness can germinate under favorable temperature and moisture conditions in autumn, even after passing through a long unfavorable (for germination) wetting and drying period at high summer temperatures in darkness. The light requirement for germination probably is not an important factor restricting D. verna to open, well‐lighted habitats.