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

研究了蓝光和红光光质对矮牵牛生长发育的影响。与红光相比，蓝光照射下植株形状变长，开花时间加快。在红光条件下，GA的合成受到抑制，导致主茎变短。在延迟开花的红光下，细胞分裂素可以诱导开花。此外，我们还从矮牵牛植物中发现了类似FT的基因“PhFT”。该基因似乎与光质反应对花的诱导无关，但我们可以通过转基因拟南芥证实该基因可以诱导花芽的形成。研究了光质量对番茄生长和诱导花的影响，结果表明，红光条件对番茄的诱导花有促进作用。

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.