UV-B Induced Damage of Photosystem II and Its Repair Via De Novo Synthesis of the D1 and D2 Reaction Center Subunits

Effects of solar ultraviolet radiation on photosynthesis of the marine red tide alga Heterosigma akashiwo (Raphidophyceae)

“…In long-term scales (> day, weeks), however, the cells can show different degrees of acclimation after exposure to high radiation through the synthesis of UV-absorbing compounds (e.g. [16]) or a fast synthesis of D1 protein [13,44].…”

Sensitivity of freshwater macrophytes to UV radiation: relationship to depth zonation in an oligotrophic New Zealand lake

“…Many plants and algae use strategies to minimize photoinhibition. For example, degraded D1 proteins can be excised and replaced to reinstate PS II function (Aro et al 1993;Sass et al 1997). Also, cellular compounds that absorb strongly in the UVR spectrum such as MAAs in algae (Dunlap and Shick 1998;Franklin et al 1999) and flavonoids in higher plants (Bornman and Teramura 1993) can reduce the potential damage incurred from UVR wavelengths (Roy 2000).…”

Solar UV Radiation Drives CO2 Fixation in Marine Phytoplankton: A Double-Edged Sword

“…In contrast to PAR, which is energizing to photosynthesis, UVR is usually regarded as a stressor (Häder, 2003) and suggested to affect CO 2 -concentrating mechanisms in phytoplankton (Beardall et al, 2002). Solar UVR is known to reduce photosynthetic rates (Steemann Nielsen, 1964;Helbling et al, 2003), and damage cellular components such as D1 proteins (Sass et al, 1997) and DNA molecules (Buma et al, 2003). It can also decrease the growth and alter the rate of nutrient uptake (Fauchot et al, 2000) and the fatty acid composition (Goes et al, 1994) of phytoplankton.…”

“…2A). UVR is known to damage the D1 protein of PSII and to inhibit photosynthesis (Sass et al, 1997). The energy of UVR, which brought about the photosynthetic carbon fixation in the absence of PAR (Fig.…”