1. Photoperiodism The response of an organism to changes in day length.

2. But there were obvious spring and strong photoperiodism tendencies among present big spike cultivars. These need to improvement.

3. They are involved in phototropism, and in PHOTOPERIODISM , where they are thought to affect phytochrome by transferring light energy from blue to red wavelengths.

4. For experimental purposes , scientists originally assumed that photoperiodism worked through photosynthesis.

5. Morphological and genetic analysis revealed some photoperiod-sensitive genetic characteristics in plants and confirmed the criteria of photoperiodism index.

6. The stimulus can be transferred from one plant to another by grafting, but attempts to isolate florigen have so far been unsuccessful. See photoperiodism.

7. A lot of recent studies demonstrated that melatonin receptor was involved in the photoperiodism.