Effects of Gibberellin, Kinetin, Thiourea, and Photomorphogenic Radiation on Mitotic Activity in Dormant Lettuce Seed
Journal Article
·
· Plant Physiology (Bethesda)
The effects of several germination-stimulating agents on mitotic activity in radicles of nongerminated lettuce seeds were studied using conditions near the upper limits of temperatures permitting germination. Under appropriate conditions where gibberellin, kinetin, thiourea, and red light could stimulate germination, only kinetin stimulated mitotic activity. Kinetin can be considered a true cell division factor in nongerminated lettuce seeds. Neither gibberellin nor red light had any significant effect on mitotic activity under conditions where they were later active in stimulating germination. The conditions under which thiourea inhibited mitosis were the same as those under which it later stimulated germination. The results are discussed in relation to seed germination, the general problem of dormancy, and the actions of the germination- stimulating agents on other aspects of growth and development.
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-022731
- OSTI ID:
- 4156451
- Journal Information:
- Plant Physiology (Bethesda), Journal Name: Plant Physiology (Bethesda) Journal Issue: 4 Vol. 35; ISSN 0032-0889
- Publisher:
- American Society of Plant Biologists
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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