Terrestrial and marine dynamics on the brink of the Messinian salinity crisis: A wet scenario from the northern Mediterranean

Bertini, Adele; Niccolini, Gabriele; Gennari, Rocco; Lozar, Francesca; Menichetti, Elena; Natalicchio, Marcello; Dela Pierre, Francesco

doi:10.1016/j.gloplacha.2024.104362

Global and Planetary Change

2024

DOI: 10.1016/j.gloplacha.2024.104362

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Terrestrial and marine dynamics on the brink of the Messinian salinity crisis: A wet scenario from the northern Mediterranean

Adele Bertini,

Gabriele Niccolini,

Rocco Gennari

et al.

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2024

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Cited by 1 publication

References 135 publications

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Occurrences of Deposited Polycyclic Aromatic Hydrocarbons in Wax of Plant Leaves Using Laser Scanning Microscopy and Gas Chromatography–Mass Spectrometry

Yang,

Liu,

Tian

et al. 2024

Atmosphere

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The knowledge of the deposition fate of ambient polycyclic aromatic hydrocarbons (PAHs) on plant leaves is limited. To fill in this knowledge gap, this study strives to observe the intermolecular complex between the polycyclic aromatic hydrocarbons and epicuticular wax of plant leaves using laser scanning microscopy. Epicuticular wax refers to a type of organic mixture that covers the outermost layer of leaves. The leaves of 20 tree species were collected in Beijing in July 2023. The concentrations of 31 PAHs were quantified by gas chromatography–mass spectrometry. Furthermore, the intermolecular complexes of polycyclic aromatic hydrocarbons and epicuticular wax were found with a fluorescence spectrofluorometer and laser scanning microscopy. The levels of total PAHs across 20 tree species ranged from 12.4 ng g−1 to 68.4 ng g−1. Differences in the amounts of total PAHs across tree leaves were observed, which may be ascribed to the differences in leaf surface across tree types. The higher concentration of low-molecular-weight PAHs was found in leaves compared to high-molecular-weight PAHs. The fluorescence spectrofluorometer identified the formation of a new intermolecular complex with fluorescence emission at an excitation wavelength of 340 nm between PAHs and epicuticular wax relative to PAHs. We used laser scanning microscopy with a 405 nm laser for excitation to observe the new intermolecular complex of PAHs and epicuticular wax on the stomata and epicuticular wax of leaves. This study found the intermolecular complex of PAHs on the surface of leaves in situ, which provides important information about the deposition fate of ambient PAHs.

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Occurrences of Deposited Polycyclic Aromatic Hydrocarbons in Wax of Plant Leaves Using Laser Scanning Microscopy and Gas Chromatography–Mass Spectrometry

Yang,

Liu,

Tian

et al. 2024

Atmosphere

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show abstract

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Terrestrial and marine dynamics on the brink of the Messinian salinity crisis: A wet scenario from the northern Mediterranean

Cited by 1 publication

References 135 publications

Occurrences of Deposited Polycyclic Aromatic Hydrocarbons in Wax of Plant Leaves Using Laser Scanning Microscopy and Gas Chromatography–Mass Spectrometry

Occurrences of Deposited Polycyclic Aromatic Hydrocarbons in Wax of Plant Leaves Using Laser Scanning Microscopy and Gas Chromatography–Mass Spectrometry

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