向日葵,由于其生长前期的幼株顶端及中期的幼嫩花盘会跟着太阳转动得非常明显而得名。人们都认为向日葵朝阳仅与光能照射有关,其实与重力作用也有着密切关系。植物体内会产生一种奇妙的生长素,大多集中在生长旺盛的部位,趋向衰老的组织和器官中则含量较少。这种植物生长素有三 Sunflowers, named after their early growth period, are the youngest of the young plant’s top and mid-spring discs that follow the sun’s rotation. People think that the sunflower sun is only related to the irradiation of light energy. In fact, it has a close relationship with the gravity. Plants produce a wonderful auxin in the body, mostly concentrated in areas where they thrive, and less in tissues and organs that tend to age. This auxin has three