Work

Stimulation of Lettuce Seed Germination at High Temperatures by Ethephon and Kinetin1

Year: 1973

Type: article

Abstract: ‘GL 659’ and ‘Vanguard’ lettuce seed lots germinated almost completely at 30°C when treated with ethephon (100 mg/liter). Similar treatment at 35°C failed to release seeds from dormancy. Kinetin treatment (10 mg/liter) at 35°C was only moderately effective in breaking heat dormancy, but when ethephon and kinetin were combined at this temperature, the interaction was synergistic and germination was almost complete. The preincubation time requirement at 25°C before maximum germination could occur after transferring to 35°C was nearly eliminated by treating seeds with the ethephon-kinetin mixture. ‘Calmar’ seeds, which had a lower heat tolerance, could not be induced to germinate completely at high temperature by any treatment.

Source: Journal of the American Society for Horticultural Science

DOI: 10.21273/jashs.98.2.209

Author: G. C. Sharpies

Institution: University of Arizona

Language: English

Topic: Seed Germination and Physiology

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,500