2008
DOI: 10.1093/aob/mcn081
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Potential regulation of gene expression in photosynthetic cells by redox and energy state: approaches towards better understanding

Abstract: The photosynthetic function of chloroplasts represents an important sensor that integrates various abiotic changes in the environment into corresponding molecular signals, which, in turn, regulate cellular activities to counterbalance the environmental changes or stresses.

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Cited by 192 publications
(158 citation statements)
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“…Curiously the authors of neither paper allude to this interesting finding which, together with our results, suggests redox-mediated retrograde signalling between the chloroplasts and the nucleus. A signalling role of ROS from the chloroplasts, involving induction of nuclear genes encoding defence related proteins, is well established (reviewed in Nott et al 2006;Pfannschmidt et al 2009), with H 2 O 2 as the prime candidate. Excess H 2 O 2 , produced by stress (or in our case elevated SOD activity) can diffuse from the chloroplast and, probably through mitogen-activated protein kinases (Kovtun et al 2000), trigger expression of nuclear encoded defence-related genes such as cAPX encoding an ascorbate peroxidise (Kimura et al 2001), Cat encoding catalase and Gst1 encoding Glutathione-S-transferase (Polidoros and Scandalios 1999), as well (in the C 3 -CAM transition species Mesembryanthemum crystallinum) as genes encoding Cu/Zn-, Mn-, and Fe-SOD (Slesak et al 2003).…”
Section: Discussionmentioning
confidence: 99%
“…Curiously the authors of neither paper allude to this interesting finding which, together with our results, suggests redox-mediated retrograde signalling between the chloroplasts and the nucleus. A signalling role of ROS from the chloroplasts, involving induction of nuclear genes encoding defence related proteins, is well established (reviewed in Nott et al 2006;Pfannschmidt et al 2009), with H 2 O 2 as the prime candidate. Excess H 2 O 2 , produced by stress (or in our case elevated SOD activity) can diffuse from the chloroplast and, probably through mitogen-activated protein kinases (Kovtun et al 2000), trigger expression of nuclear encoded defence-related genes such as cAPX encoding an ascorbate peroxidise (Kimura et al 2001), Cat encoding catalase and Gst1 encoding Glutathione-S-transferase (Polidoros and Scandalios 1999), as well (in the C 3 -CAM transition species Mesembryanthemum crystallinum) as genes encoding Cu/Zn-, Mn-, and Fe-SOD (Slesak et al 2003).…”
Section: Discussionmentioning
confidence: 99%
“…The photosynthetic apparatus responds to changes in light intensity and quality mainly through shifts in the redox balance in the chloroplast (Walters, 2005;Pfannschmidt et al, 2009). A redox-sensitive kinase, such as STN7, is certainly responsible for short-term acclimation through state transitions (Bellafiore et al, 2005) and may also be a candidate for signaling to the nucleus for long-term transcriptional changes that regulate photosystem stoichiometry (Bonardi et al, 2005).…”
Section: Glk Function In the Context Of Whole-plant Physiologymentioning
confidence: 99%
“…The contribution of these processes to the total NPQ depends on environmental conditions [115,116] and the time of their development [117]. The quantum yield of photosystem II is connected with all components of NPQ [113,118,119] as well as with the ratio of the linear and cyclic electron flows [117,120], production of reactive oxygen species [121], etc. Also, there are additional factors which can complicate interaction between photosynthetic parameters and PRI under the action of stressors.…”
Section: Conditions Of Measurementmentioning
confidence: 99%