Red light and blue light inhibited the elongation of tomato stems at seedling stage.

It is correct that red and blue light can inhibit the stem elongation of tomato seedlings. According to relevant data, red or blue light irradiation at seedling stage can promote the growth of tomato seedlings, which is beneficial to cultivate strong seedlings. Blue light can inhibit stem elongation, promote chloroplast development and increase chlorophyll content, increase leaf thickness, adjust stomatal opening, promote root development and adjust plant phototropism.