BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Phytochrome is a plant pigment found in flowering plants that can detect the presence or absence of light. Phytochrome is involved in regulating many processes that are linked to day length (photoperiod) such as seed germination and initiation of flowering i.e., photoperiodism.

Detailed explanation-2: -The pigment involved in photoperiodism is phytochrome. Phytochrome detects the presence or absence of light and is involved in regulating seed germination and initiation of flowering.

Detailed explanation-3: -Phytochromes could affect flowering by altering the phase of entrainment of the circadian clock (Somers et al. 1998), thus changing the coincidence between light and a critical circadian phase. Therefore, we examined the behavior of the circadian clock in the se5 mutant.

Detailed explanation-4: -Phytochrome is a photosensitive pigment which exists in two states. It is involved in photomorphogenetic responses, seed germination, bud dormancy, synthesis of gibberellin and ethylene and photoperiodism.

Detailed explanation-5: -Phytochromes are red (R)/far-red (FR) light photoreceptors that play fundamental roles in photoperception of the light environment and the subsequent adaptation of plant growth and development. There are five distinct phytochromes in Arabidopsis thaliana, designated phytochrome A (phyA) to phyE.