Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/00318884.2021.1953903 |
Photosynthetic response to different light exposures and associated environmental conditions of the subaerial, epilithic green alga Trentepohlia umbrina (Chlorophyta, Ulvophyceae) | |
Ellwood, Neil Thomas William; Bruno, Laura; Caneva, Giulia | |
通讯作者 | Ellwood, NTW (corresponding author), Univ Rome Roma Tre, Dept Sci, Rome, Italy. ; Ellwood, NTW (corresponding author), Univ Roma Tor Vergata, Dept Biol, Rome, Italy. |
来源期刊 | PHYCOLOGIA |
ISSN | 0031-8884 |
EISSN | 2330-2968 |
出版年 | 2021-08 |
英文摘要 | The potentially biodeteriogenic, subaerial green alga Trentepohlia umbrina is widely distributed on shaded substrates with northern aspects. This preference for low light was confirmed by a recent survey in Lazio, Italy. However, the same survey revealed an isolated occurrence of extensive growths of T. umbrina-dominated biofilms on surfaces with diverse aspects that ranged from highly exposed to shaded. Prior studies of Trentepohlia photosynthesis have been restricted to single sites, so this multi-aspect site was particularly interesting to understand the photoacclimation potential of Trentepohlia. Photosynthetic pigment concentrations and chlorophyll fluorescence (in situ and ex situ) were used to assess the photosynthetic response to changes in light exposure and humidity. Pigment contents and photoinhibition decreased, while the maximum photosynthetic rate and the level of light that saturated photosynthesis increased with an increasing light exposure duration (ranging from c. 5 to 300 min d(-1) of exposure to sunlight). Laboratory tests of relative humidity (RH) on biofilm photosynthesis showed no recorded activity up to 32% RH, only 26% of the maximum activity at 77% RH, and full activity at 92% RH. When T. umbrina was in the desiccated state a lowering of basal of chlorophyll a fluorescence emission and a loss of variable fluorescence occurred. This suppression of fluorescence when cells are desiccated is known to result in photoprotection of reaction centres from continuing high irradiances, as the enhanced thermal dissipation replaces slower and potentially damaging energy transfer to the functional reaction centres. It was concluded that T. umbrina has a much wider environmental range than previously thought, but its growth is very slow and may be overlooked during cultural heritage surveillance, leading to inconspicuous chronic degradation of outdoor stone substrata. |
英文关键词 | Biodeteriogenic Desiccation Lithotrophic Photoacclimation Quenching |
类型 | Article ; Early Access |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:000685002600001 |
WOS关键词 | IN-SITU ; DESICCATION ; DESERT ; FLUORESCENCE ; CURVES ; GROWTH ; PHOTOINHIBITION ; PERFORMANCE ; PHOTOACCLIMATION ; KLEBSORMIDIUM |
WOS类目 | Plant Sciences ; Marine & Freshwater Biology |
WOS研究方向 | Plant Sciences ; Marine & Freshwater Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/364310 |
作者单位 | [Ellwood, Neil Thomas William; Caneva, Giulia] Univ Rome Roma Tre, Dept Sci, Rome, Italy; [Ellwood, Neil Thomas William; Bruno, Laura] Univ Roma Tor Vergata, Dept Biol, Rome, Italy |
推荐引用方式 GB/T 7714 | Ellwood, Neil Thomas William,Bruno, Laura,Caneva, Giulia. Photosynthetic response to different light exposures and associated environmental conditions of the subaerial, epilithic green alga Trentepohlia umbrina (Chlorophyta, Ulvophyceae)[J],2021. |
APA | Ellwood, Neil Thomas William,Bruno, Laura,&Caneva, Giulia.(2021).Photosynthetic response to different light exposures and associated environmental conditions of the subaerial, epilithic green alga Trentepohlia umbrina (Chlorophyta, Ulvophyceae).PHYCOLOGIA. |
MLA | Ellwood, Neil Thomas William,et al."Photosynthetic response to different light exposures and associated environmental conditions of the subaerial, epilithic green alga Trentepohlia umbrina (Chlorophyta, Ulvophyceae)".PHYCOLOGIA (2021). |
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