Phytochrome Transformation and Action in Seeds of Rumex crispus L. during Secondary Dormancy
Year: 1973
Type: article
Abstract: Promotion of germination by red light fails after prolonged dark imbibition of Rumex crispus L. seeds, indicative of a secondary dormancy. The degree and rate of inception of the dormancy increases with increasing temperature. Following establishment of the dormancy, germination response to red light can be restored by either prolonged cold treatment or brief high temperature shifts. Loss of phytochrome was not a factor in the initial establishment of the dormancy. When the seeds are in secondary dormancy, the chromophore of phytochrome can be transformed to the far red-absorbing form, but the far red-absorbing form cannot induce germination. The responses to changes in temperature suggested dependence of germination on order left arrow over right arrow disorder transitions in components of the seeds.
Source: PLANT PHYSIOLOGY
DOI: 10.1104/pp.52.5.475
Authors: R. B. Taylorson, S. B. Hendricks
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W2004164263