Dark Reversion of Phytochrome in Lettuce Seeds Stored in a Water-saturated Atmosphere 1

AUTOR(ES)

Hsiao, A. I-Hsiung

RESUMO

Dark reversion of the far red-absorbing form of phytochrome, which does not occur in dry lettuce (Lactuca sativa var. Grand Rapids) seeds, appears to take place in seeds stored in a water-saturated atmosphere. The water content (approximately 70% after 10 days) of such seeds is insufficient to support germination; however the treatment enhances germination in seeds stored for 1 to 5 days, but this enhancement subsequently disappears, and the effect of extended storage (up to 28 days) is inhibiting. The half-time for dark far red-absorbing phytochrome reversion is 7 to 8 days, and at this time it can be completely reversed by exposing the seeds to a flash of red light. Storage of more than 7 to 8 days decreases red light enhancement of germination.

Documentos Relacionados

• Steam injection into water-saturated porous rock
• Problems of the Acetylene Reduction Technique Applied to Water-Saturated Paddy Soils
• Erratum: (Computational and Applied Mathematics, Vol. 22, N. 3, pp. 359-395) Steam injection into water-saturated porous rock
• Water Content and Phytochrome-induced Potential Germination Responses in Lettuce Seeds 1
• Dark Reversion of Phytochrome in Sinapis alba L. 1