What will turn red in spring?

In spring, the leaves of Lagerstroemia indica will turn red; The leaf color of Hyun Hong Yang changes from bright red in mid-March to purple and orange. The petiole, vein and stem of Xuan Hongyang are always bright red. There are chlorophyll and anthocyanin in leaves. When anthocyanins in leaves are more than chlorophyll, they will appear purple. The light is weak all winter, so the leaves are green. In spring, the light gets stronger, so the leaves turn red or even purple.

Chlorophyll photosynthesis is strong, but anthocyanin photosynthesis is weak. In many plants, chlorophyll will increase when the light condition is weak. In order to maintain sufficient growth, photosynthetic leaves will become greener and purple under strong light, because a small amount of chlorophyll will produce enough nutrients to survive. This phenomenon is a self-protection mechanism of plants and the result of long-term evolution.

Ziwei alias: itchy flower, prurigo, purple flower, purple orchid, mosquito flower, bayberry, skinless tree. It is a deciduous shrub or small tree of Lagerstroemia of Myrtaceae in dicotyledonous plant class.

Lagerstroemia indica has beautiful posture, smooth trunk and bright colors; When it blooms, it happens to be the season when there are few flowers in summer and autumn, and the flowering period is long. Therefore, it is known as "Hundred Days Red" and "Summer Blue and White Flowers Full", and it is a good bonsai for viewing flowers, stems and roots; Roots, bark, leaves and flowers can be used as medicine.