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- W2044698104 abstract "Abstract Recent hypotheses suppose that dry lichens emit a faint chlorophyll a fluorescence because of a “long-wavelength quencher” embedded in the antenna complex that protects photosystem II (PSII) from photodamage. To verify in the field the PSII re-activation promptness induced by water availability, chlorophyll a fluorescence was measured on the epiphytic lichen Flavoparmelia soredians after two months without rainfall events in a Mediterranean cork oak wood (Bosco Santo Pietro, Sicily, Italy). Measurements were carried out at dawn and sunset on north- and south-exposed populations under different regimes of hydration and dark-adaptation. The results show that prolonged hydration increases the photochemical conveying of energy to PSII and decreases the non-photochemical energy dissipation that otherwise might occur in the antenna complex of the lichen photobionts. A slight decrease in PSII efficiency caused by photoinhibition was observed in thalli exposed to ambient light (up to 600 μmol photons m−2 s–1) only when kept fully hydrated. The results are discussed on the basis of our knowledge on the ecology of the species, that is a representative component of Mediterranean epiphytic lichen communities." @default.
- W2044698104 created "2016-06-24" @default.
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- W2044698104 date "2012-01-01" @default.
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- W2044698104 title "Effects of Mediterranean summer conditions on chlorophyll <i>a</i> fluorescence emission in the epiphytic lichen <i>Flavoparmelia soredians</i>: a field study" @default.
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- W2044698104 doi "https://doi.org/10.1080/11263504.2012.727881" @default.
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