The light receptor pigment present in seeds is

The light receptor pigment present in seeds is Phytochrome.
Phytochromes are a class of photoreceptors in plants, bacteria and fungi used to detect light. They are sensitive to light in the red and far-red regions of the visible spectrum.
They regulate the germination of seeds (photoblasty), the synthesis of chlorophyll, the elongation of seedlings, the size, shape and number, the movement of leaves and the timing of flowering in adult plants.