Differential blockage of photosynthetic electron flow in young and mature leaves of Arabidopsis thaliana by exogenous proline
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| 024 | 7 | 0 | |a 10.1007/s11099-015-0116-3 |2 doi |
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| 245 | 0 | 0 | |a Differential blockage of photosynthetic electron flow in young and mature leaves of Arabidopsis thaliana by exogenous proline |h [Elektronische Daten] |c [I. Sperdouli, M. Moustakas] |
| 520 | 3 | |a Responses of the photosynthetic electron transport system of chloroplasts to exogenous proline application were evaluated in young and mature leaves of Arabidopsis thaliana plants under optimal growth conditions. Exogenous proline application (10 mM) during the 4th week of growth increased proline accumulation in young leaves more than in mature leaves, and possibly due to its degradation producing NADPH, decreased significantly the ratio of NADP+/NADPH in both leaf types compared with controls (without proline). However, the ratio of NADP+/NADPH remained significantly higher in the young leaves, suggesting lower proline degradation which resulted in less reduced plastoquinone pool than that in the mature leaves, under both low light [130 μmol(photon) m−2 s−1] and high light [1,200 μmol(photon) m−2 s−1] treatments. The young leaves seemed to adjust nonphotochemical fluorescence quenching in order to maintain a better PSII quantum yield. We concluded that under optimal growth conditions exogenous proline results in overreduction of the plastoquinone pool and blockage of photosynthetic electron flow due to accumulation of NADPH. We suggest that optimum concentrations of proline are required for optimal PSII photochemistry. | |
| 540 | |a The Institute of Experimental Botany, 2015 | ||
| 690 | 7 | |a chlorophyll fluorescence |2 nationallicence | |
| 690 | 7 | |a electron transport rate |2 nationallicence | |
| 690 | 7 | |a leaf age |2 nationallicence | |
| 690 | 7 | |a reactive oxygen species |2 nationallicence | |
| 690 | 7 | |a AL : actinic light |2 nationallicence | |
| 690 | 7 | |a AOI : area of interest |2 nationallicence | |
| 690 | 7 | |a Chl : chlorophyll |2 nationallicence | |
| 690 | 7 | |a ETR : electron transport rate |2 nationallicence | |
| 690 | 7 | |a F0, Fm : minimal and maximal chlorophyll a fluorescence of the dark-adapted state |2 nationallicence | |
| 690 | 7 | |a F0′, Fm′ : minimal and maximal chlorophyll a fluorescence of the light-adapted state |2 nationallicence | |
| 690 | 7 | |a Fs : steady-state photosynthesis at a given actinic light |2 nationallicence | |
| 690 | 7 | |a Fv/Fm : potential (maximal) quantum yield of PSII photochemistry |2 nationallicence | |
| 690 | 7 | |a HL : high light |2 nationallicence | |
| 690 | 7 | |a LL : low light |2 nationallicence | |
| 690 | 7 | |a ML : mature leaves |2 nationallicence | |
| 690 | 7 | |a NPQ : nonphotochemical quenching |2 nationallicence | |
| 690 | 7 | |a P5C : Δ1-pyrroline-5-carboxylate |2 nationallicence | |
| 690 | 7 | |a P5CDH : Δ1-pyrroline-5-carboxylate dehydrogenase |2 nationallicence | |
| 690 | 7 | |a P5CR : Δ1-pyrroline-5-carboxylate reductase |2 nationallicence | |
| 690 | 7 | |a P5CS : Δ1-pyrroline-5-carboxylate synthase |2 nationallicence | |
| 690 | 7 | |a PDH : proline dehydrogenase |2 nationallicence | |
| 690 | 7 | |a PQ : plastoquinone |2 nationallicence | |
| 690 | 7 | |a Pro : proline |2 nationallicence | |
| 690 | 7 | |a qP : photochemical quenching coefficient |2 nationallicence | |
| 690 | 7 | |a ROS : reactive oxygen species |2 nationallicence | |
| 690 | 7 | |a YL : young leaves |2 nationallicence | |
| 690 | 7 | |a ΦPSII : actual (effective) quantum yield of PSII photochemistry |2 nationallicence | |
| 700 | 1 | |a Sperdouli |D I. |u Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece |4 aut | |
| 700 | 1 | |a Moustakas |D M. |u Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece |4 aut | |
| 773 | 0 | |t Photosynthetica |d The Institute of Experimental Biology of the Czech Academy of Sciences |g 53/3(2015-09-01), 471-477 |x 0300-3604 |q 53:3<471 |1 2015 |2 53 |o 11099 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s11099-015-0116-3 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s11099-015-0116-3 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Sperdouli |D I. |u Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Moustakas |D M. |u Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Photosynthetica |d The Institute of Experimental Biology of the Czech Academy of Sciences |g 53/3(2015-09-01), 471-477 |x 0300-3604 |q 53:3<471 |1 2015 |2 53 |o 11099 | ||