Abstract:
:We examined the influence of solar ultraviolet-B radiation (UV-B; 280-320 nm) on the growth, biomass production and phenylpropanoid concentrations of Deschampsia antarctica during the springtime ozone depletion season at Palmer Station, along the Antarctic Peninsula. Treatments involved placing filters on frames over potted plants that reduced levels of biologically effective UV-B either by 83% (reduced UV-B) or by 12% (near-ambient UV-B) over the 63 day experiment (7 November 1998-8 January 1999) when ozone depletion averaged 17%. Plants growing under near-ambient UV-B had 41% and 40% lower relative growth rates and net assimilation rates, respectively, than those under reduced UV-B. The former plants produced 50% less total biomass as a result of having 47% less aboveground biomass. The reduction in aboveground biomass was a result of a 29% lower leaf elongation rate resulting in shorter leaves and 59% less total leaf area in plants grown under reduced UV-B. p-Coumaric, caffeic and ferulic acids were the major hydroxycinnamic acids, and luteolin derivatives were the major flavonoids in both insoluble and soluble leaf extracts. Concentrations of insoluble p-coumaric and caffeic acid and soluble ferulic acids were 38%, 48% and 60% higher, respectively, under near-ambient UV-B than under reduced UV-B. There were no UV-B effects on concentrations of insoluble or soluble flavonoids.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Ruhland CT,Xiong FS,Clark WD,Day TAdoi
10.1562/2004-09-18-RA-321subject
Has Abstractpub_date
2005-09-01 00:00:00pages
1086-93issue
5eissn
0031-8655issn
1751-1097pii
2004-09-18-RA-321journal_volume
81pub_type
杂志文章abstract::The classic method of photometric curves for photosensitivity determination has been extended to the case of photoreversible reactions and applied to the octopus rhodopsin --> acid metarhodopsin photoreaction. In such cases, measurements at one irradiation wavelength yield the sum of the photosensitivities of the forw...
journal_title:Photochemistry and photobiology
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pub_type: 杂志文章
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
doi:10.1111/php.12790
更新日期:2017-11-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.2007.00206.x
更新日期:2008-01-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/0031-8655(2001)074<0829:aeftcg>2.0.co;2
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1991.tb01996.x
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1991.tb08470.x
更新日期:1991-01-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1991.tb02084.x
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:
更新日期:1998-10-01 00:00:00
abstract::Nowadays, introducing self-cleaning properties on various fabrics under daylight irradiation for automotive and upholstery application is in a central point of research. This can be achieved by application of metal-doped TiO2 nano particles on the textile fabrics. Here, alkali hydrolysis of polyester fabric has been c...
journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
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journal_title:Photochemistry and photobiology
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更新日期:1992-05-01 00:00:00
abstract::Solar ultraviolet B (UVB) radiation has been shown to induce inflammation, DNA damage, p53 mutations and alterations in signaling pathways eventually leading to skin cancer. In this study, we investigated whether fisetin reduces inflammatory responses and modulates PI3K/AKT/NFκB cell survival signaling pathways in UVB...
journal_title:Photochemistry and photobiology
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更新日期:2015-01-01 00:00:00
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
doi:10.1111/j.1751-1097.1991.tb09896.x
更新日期:1991-06-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
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更新日期:2002-04-01 00:00:00
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:
更新日期:1999-06-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.2012.01183.x
更新日期:2012-11-01 00:00:00
abstract::The marine annelid Chaetopterus variopedatus produces bioluminescence by an unknown and potentially novel mechanism. We have advanced the study of this fascinating phenomenon, which has not been investigated for nearly 60 years after initial studies were first reported for this species. Here, we show that the luminous...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/php.12169
更新日期:2014-01-01 00:00:00
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1991.tb03638.x
更新日期:1991-03-01 00:00:00