Analysis on the response of petunia and tomato's flowering and main stem elongation under blue and red light conditions.

研究了蓝光和红光的光质对矮牵牛生长发育的影响。与红光相比，蓝光下植株形态变长，开花促进。红光条件下，GA合成受到抑制，导致主茎矮化。在延迟开花的红光下，细胞分裂素可以诱导开花。此外，我们还从矮牵牛中发现了类似FT的基因‘phft’。该基因似乎与花诱导的光质反应无关，但我们可以用转基因拟南芥证实该基因可以诱导花芽的形成。我们还研究了光质对番茄生长和成花的影响，结果表明，红光条件促进了番茄的成花诱导。

We evaluated the effects of light quality of blue and red light on growth and development of petunia. The plant shape became longer and flowering was promoted under blue light compared to red light. Under red light condition, GA synthesis was inhibited and it could lead the short main stem. Under red light that delayed floral induction, cytokinin could induce the flowering. In addition, we found out the FT like gene, 'PhFT' from petunia plant. This gene dose not seems to be related to light quality response on floral induction, but we could confirm that this gene could induce the floral bud formation by using the transgenic Arabidopsis. We also investigated the effects of light quality on growth and floral induction in tomato, and showed that tomato's floral induction was promoted by red light condition.