Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11738-018-2751-3 |
Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont | |
Milos, Bartak1; Josef, Hajek1; Jana, Morkusova1; Katerina, Skacelova1; Alica, Kosuthova2 | |
通讯作者 | Josef, Hajek |
来源期刊 | ACTA PHYSIOLOGIAE PLANTARUM
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ISSN | 0137-5881 |
EISSN | 1861-1664 |
出版年 | 2018 |
卷号 | 40期号:10 |
英文摘要 | In this study, we investigated responses of the Photochemical Reflectance Index (PRI), and Normalized Difference Vegetation Index (NDVI) to gradual dehydration of several Antarctic lichen species (chlorolichens: Xanthoria elegans, Rhizoplaca melanophthalma, Physconia muscigena, cyanolichen: Leptogium puberulum), and a Nostoc commune colony from fully wet to a dry state. The gradual loss of physiological activity during dehydration was evaluated by chlorophyll fluorescence parameters. The experimental lichen species differed in thallus color, and intrathalline photobiont. In the species that did not exhibit color change with desiccation (X. elegans), NDVI and PRI were more or less constant (mean of 0.25, -0.36, respectively) throughout a wide range of thallus hydration status showing a linear relation to relative water content (RWC). In contrast, the species with apparent species-specific color change during dehydration exhibited a curvilinear relation of NDVI and PRI to RWC. PRI decreased (R. melanophthalma, L. puberulum), increased (N. commune) or showed a polyphasic response (P. muscigena) with desiccation. Except for X. elegans, a curvilinear relation was found between the NDVI response to RWC in all species indicating the potential of combined ground research and remote sensing spectral data analyses in polar regions dominated by lichen flora. The chlorophyll fluorescence data recorded during dehydration (RWC decreased from 100 to 0%) revealed a polyphasic species-specific response of variable fluorescence measured at steady stateF(s), effective quantum yield of photosystem II (phi(PSII)), and non-photochemical quenching (qN). Full hydration caused an inhibition of phi(PSII) in N. commune while other species remained unaffected. The dehydration-dependent fall in phi(PSII) was species-specific, starting at an RWC range of 22-32%. Critical RWC for phi(PSII) was around 5-10%. Desiccation led to a species-specific polyphasic decrease in F-s and an increase in qN indicating the involvement of protective mechanisms in the chloroplastic apparatus of lichen photobionts and N. commune cells. In this study, the spectral reflectance and chlorophyll fluorescence data are discussed in relation to the potential of ecophysiological processes in Antarctic lichens, their resistance to desiccation and survival in Antarctic vegetation oases. |
英文关键词 | Spectral indices PRI NDVI Non-photochemical quenching James Ross Island |
类型 | Article |
语种 | 英语 |
国家 | Czech Republic |
收录类别 | SCI-E |
WOS记录号 | WOS:000444010700001 |
WOS关键词 | CYANOBACTERIUM NOSTOC-COMMUNE ; LIGHT-USE EFFICIENCY ; THERMAL-ENERGY DISSIPATION ; UMBILICARIA-ANTARCTICA ; GREEN-ALGAE ; LEAF ; PHOTOPROTECTION ; PHOTOSYNTHESIS ; CANOPY ; STRESS |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207189 |
作者单位 | 1.Masaryk Univ, Lab Photosynthet Proc, Dept Expt Biol, Fac Sci, Univ Campus Bohunice,Kamenice 5, Brno 62500, Czech Republic; 2.Masaryk Univ, Dept Bot & Zool, Fac Sci, Univ Campus Bohunice,Kamenice 5, Brno 62500, Czech Republic |
推荐引用方式 GB/T 7714 | Milos, Bartak,Josef, Hajek,Jana, Morkusova,et al. Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont[J],2018,40(10). |
APA | Milos, Bartak,Josef, Hajek,Jana, Morkusova,Katerina, Skacelova,&Alica, Kosuthova.(2018).Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont.ACTA PHYSIOLOGIAE PLANTARUM,40(10). |
MLA | Milos, Bartak,et al."Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont".ACTA PHYSIOLOGIAE PLANTARUM 40.10(2018). |
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