We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of temperature and light on germination and early seedling development of the pine pink orchid ( Bletia purpurea).
- Authors
JOHNSON, TIMOTHY R.; KANE, MICHAEL E.
- Abstract
Orchid seed physiology is a poorly understood phenomenon owing to an emphasis on production and the challenges associated with propagating orchids from minute seed. We investigated the role of simulated south Florida temperatures and illumination (dark and 12 h photoperiod) in regulating germination and seedling development using asymbiotic seed germination assays of Bletia purpurea. Our objectives were to determine whether in situ germination is limited by seasonal temperatures and to determine whether temperature alters responses to illumination. Bletia purpurea seeds were able to germinate to > 90% under all treatments. The greatest germination after 3 weeks was observed at 29/19°C under continual darkness and at 25°C under dark and illuminated conditions. The slowest germination was observed at simulated winter temperatures (22/11°C). Illumination initially inhibited germination and development, but resulted in equal or greater development by week six. Germination under 22/11°C was strongly inhibited by illumination, indicating an interaction between temperature and light sensing systems.
- Subjects
PLANT reproduction; ORCHIDS; GERMINATION; SEEDLINGS; LAELIA purpurata; SEED viability
- Publication
Plant Species Biology, 2012, Vol 27, Issue 2, p174
- ISSN
0913-557X
- Publication type
Article
- DOI
10.1111/j.1442-1984.2011.00347.x