Abstract
The redox status in plant cells has been shown to have regulatory functions in their development or differentiation processes in addition to the anti-oxidant functions. The redox status changes in response to various environmental conditions, especially, high-light/low-temperature conditions. The plants in northern-temperate regions are frequently to be exposed to these conditions, thus, we hypothesized that northern plants may use the redox status as signals for their life-cycle regulations. To prove this hypothesis, we have been extensively identifying the transcripts induced in Taxus cuspidata leaves under high-light/low-temperature conditions. As to date, we have analyzed 1,000 expressed sequence tags (EST) from a library made from high-light (700μE m-2 s-1)/low-temperature (4°C) treated Taxus cuspidata leaves. In the EST, the clones corresponding to FT, which controls flowering time in plants, and AP2/EREBP-motif contained protein were included. A further EST collection is now in progress.
