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- Title
Multiple environmental signals required for embryo growth and germination of seeds of Selinum carvifolia(L.) L. and Angelica sylvestrisL. (Apiaceae).
- Authors
Filip Vandelook; Nele Bolle; Jozef A. Van Assche
- Abstract
AbstractGermination and dormancy breaking requirements were studied in Selinum carvifolia(L.) L. and Angelica sylvestrisL. (Apiaceae). Seeds of these two species have an underdeveloped embryo and are morpho-physiologically dormant. The embryo does not start to grow until physiological dormancy is broken by cold stratification. Incubating seeds at fluctuating temperatures in the light, after cold stratification, had a stimulating effect on embryo growth and seed germination. Seeds of S. carvifoliaand A. sylvestrishave non-deep simple morphophysiological dormancy (MPD), since gibberellic acid (GA3) could substitute for cold stratification. This is the first report of non-deep simple MPD that is broken by cold stratification in the Apiaceae. Under natural conditions, physiological dormancy is broken by low temperature conditions during winter. Embryo growth and germination occur in a short time interval when temperatures start rising in early spring. Due to the fact that multiple environmental signals regulate dormancy, seedling emergence in these species is timed very accurately in spring.
- Subjects
PLANT physiology; PLANT embryology; MORPHIDAE; GERMINATION
- Publication
Seed Science Research, 2007, Vol 17, Issue 4, p283
- ISSN
0960-2585
- Publication type
Article
- DOI
10.1017/S0960258507838888