Time course of the photochemical reflectance index during photosynthetic induction: its relationship with the photochemical yield of photosystem II

2018 ◽  
Vol 165 (3) ◽  
pp. 524-536 ◽  
Author(s):  
Keach Murakami ◽  
Yasuomi Ibaraki
Keyword(s):  
Photosystem Ii ◽  
Time Course ◽  
Photosynthetic Induction ◽  
Photochemical Reflectance Index ◽  
Photochemical Yield

scholarly journals The time course of photoinactivation of photosystem II in leaves revisited

2012 ◽  
Vol 113 (1-3) ◽  
pp. 157-164 ◽  
Author(s):  
Jiancun Kou ◽  
Riichi Oguchi ◽  
Da-Yong Fan ◽  
Wah Soon Chow
Keyword(s):  
Photosystem Ii ◽  
Time Course

scholarly journals Two Quenchers Formed During Photodamage of Phostosystem II and The Role of One Quencher in Preemptive Photoprotection

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Alonso Zavafer ◽  
Ievgeniia Iermak ◽  
Mun Hon Cheah ◽  
Wah Soon Chow
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Time Course ◽  
Physiological Role ◽  
Reaction Centre ◽  
Time Resolved ◽  
Fluorescence Quencher

AbstractThe quenching of chlorophyll fluorescence caused by photodamage of Photosystem II (qI) is a well recognized phenomenon, where the nature and physiological role of which are still debatable. Paradoxically, photodamage to the reaction centre of Photosystem II is supposed to be alleviated by excitation quenching mechanisms which manifest as fluorescence quenchers. Here we investigated the time course of PSII photodamage in vivo and in vitro and that of picosecond time-resolved chlorophyll fluorescence (quencher formation). Two long-lived fluorescence quenching processes during photodamage were observed and were formed at different speeds. The slow-developing quenching process exhibited a time course similar to that of the accumulation of photodamaged PSII, while the fast-developing process took place faster than the light-induced PSII damage. We attribute the slow process to the accumulation of photodamaged PSII and the fast process to an independent quenching mechanism that precedes PSII photodamage and that alleviates the inactivation of the PSII reaction centre.

scholarly journals Development of Photosynthetic Induction Transients in Greening Leaves of Wheat and French Bean

1973 ◽  
Vol 26 (1) ◽  
pp. 277
Author(s):  
JTO Kirk
Keyword(s):  
Steady State ◽  
Characteristic Time ◽  
Time Course ◽  
Photosynthetic Activity ◽  
French Bean ◽  
Lag Phase ◽  
Photosynthetic Induction ◽  
Slow Rise ◽  
Wheat Leaves ◽  
Bean Leaves

The induction phenomena of photosynthesis at different stages during the greening of dark-grown wheat and bean leaves have been studied. When etiolated wheat leaves first acquire photosynthetic activity, the characteristic time course of oxygen evolution consists of a distinct lag phase followed by a slow rise to the steady state.

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