Melatonin is an ancient molecule that can be traced back to the origin of life. Melatonin's
initial function was likely that as a free radical scavenger. Melatonin presumably evolved in …

Light is essential for photosynthesis. Nevertheless, its intensity widely changes depending
on time of day, weather, season, and localization of individual leaves within canopies. This …

All cyanobacteria, algae, and plants use a similar water-oxidizing catalyst for water
oxidation. This catalyst is housed in Photosystem II, a membrane-protein complex that …

Oxygen is a natural acceptor of electrons in the respiratory pathway of aerobic organisms
and in many other biochemical reactions. Aerobic metabolism is always associated with the …

In response to a sudden increase in light intensity, plants must cope with absorbed excess
photon energy to protect photosystems from photodamage. Under fluctuating light, PSI is …

Abstract Photosystem I (PS I) photoinhibition suppresses plant photosynthesis and growth.
However, the mechanism underlying PS I photoinhibition has not been fully clarified. In this …

Photosynthesis uses sunlight to convert water and carbon dioxide into biomass and oxygen.
When in excess, light can be dangerous for the photosynthetic apparatus because it can …

Light induced damage of the photosynthetic apparatus is an important and highly complex
phenomenon, which affects primarily the Photosystem II complex. Here the author …

Abstract Photoinhibition of Photosystem II (PSII) is the light-induced loss of PSII electron-
transfer activity. Although photoinhibition has been studied for a long time, there is no …

Salicylic acid (SA), an essential plant hormone, has received much attention due to its role in
modulating the adverse effects of biotic and abiotic stresses, acting as an antioxidant and …