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Cited by 59Photosynthetic Processes and MechanismsPlant Stress Responses and TolerancePhotochemistry and Electron Transfer Studies

The DOI matches its Crossref record; 55 of the 56 references it cites were found in a registry or an index, and 1 are not checked yet.

Thermoluminescence and fluorescence study of changes in Photosystem II photochemistry in desiccating barley leaves

Skotnica, Jiří, Matoušková, Martina, Nauš, Jan, Lazár, Dušan, Dvořák, Lubomír·2000·Photosynthesis Research
DOI 10.1023/a:1006472129684
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Abstract

An effect of desiccation (a decrease of relative water content from 97% to 10% within 35 h) on Photosystem II was studied in barley leaf segments (Hordeum vulgare L. cv. Akcent) using chlorophyll a fluorescence and thermoluminescence (TL). The O-J-I-P fluorescence induction curve revealed a decrease of F(P) and a slight shift of the J step to a shorter time with no change in its height. The analysis of the fluorescence decline after a saturating light flash revealed an increased portion of slow exponential components with increasing desiccation. The TL bands obtained after excitation by continuous light were situated at about -27 degrees C (Z(v) band - recombination of P680(+)Q(A) (-)), -14 degrees C (A band - S(3)Q(A) (-)), +12 degrees C (B band - S(2/3)Q(B) (-)) and +45 degrees C (C band - TyrD(+)Q(A) (-)). The bands related to the S-states of oxygen evolving complex (A and B) were reduced by desiccation and shifted to higher and lower temperatures, respectively. In accordance with this, the band observed at about +27 degrees C (S(2)Q(B) (-)) after excitation by 1 flash fired at -10 degrees C and band at about +20 degrees C (S(2/3)Q(B) (-)) after 2 flashes decreased with increasing water deficit and shifted to lower temperatures. A new band around 5 degrees C appeared in both regimes of TL excitation for a relative water content of under 42% and was attributed to the Q band (S(2)Q(A) (-)). It is suggested that under desiccation, an inhibition of the formation of S(2)- and S(3)-states in OEC occurred simultaneously with a lowering of electron transport on the acceptor side of PS II. The temperature down-shift of the TL bands obtained after the flash excitation was induced at the initial phases of water stress, indicating a decrease of the activation energy for the S(2/3)Q(B) (-)recombination.

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Metadata

Authors
Skotnica, J., Matoušková, M., Nauš, J., Lazár, D., & Dvořák, L.
Affiliations
  • Palacký University Olomouc (CZ)
  • Photon Systems Instruments (Czechia) (CZ)
ORCID
Venue
Photosynthesis Research
Publisher
Springer Science and Business Media LLC
Published
2000-07
Volume
65
Issue
1
Pages
29-40
ISSN
  • 0166-8595 (ISSN-L)
  • 1573-5079
DOI
10.1023/a:1006472129684
OpenAlex
W1504704040
Cited by
59
References
56
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 5 · 2019: 2 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 2 · 2014: 4 · 2013: 7 · 2012: 1
FWCI
0.24
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • Photosynthesis Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
Keywords
photosystem II, desiccation, drought stress, barley leaves, thermoluminescence, chlorophyll fluorescence, oxygen-evolving complex, electron transport, relative water content, activation energy

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