| Changes in antenna of photosystem II induced by short-term heating. | |
| | |
MedLine Citation:
|
PMID: 21140217 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Changes in antenna of photosystem II, induced by short-term heating, were studied using characteristics of a short-wavelength band in low-temperature fluorescence spectra (77 K) of pea chloroplasts. Heating for 5 min was carried out at 25 and 45°C in the darkness or in the presence of white light with intensity of 260 or 1,400 μmol/m(2)s. Most modes of thermal treating induced a decrease in integral intensity of the band and an increase of its half-width. The changes were more prominent at high-temperature heating. The second derivative of the contour of a short-wavelength band showed its three components around 680, 685, and 693 nm, the first of which belongs to emission of the outer antenna of Photosystem II, and the other two to its inner antenna. As the fourth derivative shows, high-temperature heating in the presence of light evokes an appearance of some additional components in a short-wavelength region (654, 658, 661, 666, 672, and 675 nm) as well as of two additional components, 682 and 689 nm, in the region of 685-nm peak. Two subcomponents, 692 and 694 nm, can be detected in the 693-nm component. The results are discussed on the basis of the data concerning energy levels and pathways of energy transfer in pigment-protein complexes of the outer and the inner antennas of photosystem II. It is assumed that a protective role of low light relates to inducing of an essential disarrangement in the outer and the inner antennas and of a subsequent decrease in energy funneling to reaction centers, which, in turn, lowers the extent of photoinhibition. |
| | |
Authors:
|
Svetlana M Kochubey |
Related Documents
:
|
17989967 - Effect of tactile stimulus frequency on time perception: the role of working memory. 1939887 - Comodulation masking release as a function of level. 16865387 - When males whistle at females: complex fm acoustic signals in cockroaches. 17485977 - Combined effects of frequency compression-expansion and shift on speech recognition. 11765127 - Molecular regulation of circadian rhythms in drosophila and mammals. 12770037 - Improvement of signal-to-noise ratio in electroantennogram responses using multiple ins... |
Publication Detail:
|
Type: Journal Article Date: 2010-12-08 |
Journal Detail:
|
Title: Photosynthesis research Volume: 106 ISSN: 1573-5079 ISO Abbreviation: Photosyn. Res. Publication Date: 2010 Dec |
Date Detail:
|
Created Date: 2010-12-21 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100954728 Medline TA: Photosynth Res Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 239-46 Citation Subset: IM |
Affiliation:
|
Institute of Plant Physiology, National Academy of Sciences of Ukraine, Vasylkivska Str. 31/17, Kiev, Ukraine, smk_off@mail.ru. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Lubiprostone Activates Cl(-) Secretion via cAMP Signaling and Increases Membrane CFTR in the Human C...
Next Document: Increased Mortality Among Hispanic Testis Cancer Patients Independent of Neighborhood Socioeconomic ...