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Photoprotection dynamics observed at leaf level from fast temporal reflectance changes

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Photoprotection dynamics observed at leaf level from fast temporal reflectance changes

dc.contributor.author	Van Wittenberghe, Shari
dc.contributor.author	Alonso Chordá, Luis
dc.contributor.author	Malenovský, Zbyněk
dc.contributor.author	Moreno Méndez, José F.
dc.date.accessioned	2019-02-05T15:22:24Z
dc.date.available	2019-02-05T15:22:24Z
dc.date.issued	2018
dc.identifier.citation	Van Wittenberghe, Shari Alonso Chordá, Luis Malenovský, Zbyn&#283k Moreno Méndez, José F. 2018 Photoprotection dynamics observed at leaf level from fast temporal reflectance changes Geoscience and Remote Sensing (IGARSS), IEEE International Symposium IGARSS 2018 5991 5994
dc.identifier.uri	http://hdl.handle.net/10550/68868
dc.description.abstract	Vegetation dynamically reacts to the available photosynthetically active radiation (PAR) by adjusting the photosynthetic apparatus to either a light harvesting or a photoprotective modus. When activating the photoprotection mechanism, either minor or major pigment-protein interactions may occur at the leaf level, resulting in different light absorption and consequently reflectance intensities. The reflectance changes were measured during sudden illumination transients designed to provoke fast adaptation to high irradiance. Different spectral reflectance change features were observed during different stages of photoprotection activation, extending over part of the visible spectral range (i.e. 490-650 nm). Due to this multiple wavelength reflectance modification, which affects also the reference band at 570 nm, the commonly used Photochemical Reflectance Index (PRI) is unable to trace and quantify such strong photoprotection mechanism. To quantify the entire photoprotection with a required accuracy, the spectral changes in the full visible range must be characterized.
dc.language.iso	eng
dc.relation.ispartof	Geoscience and Remote Sensing (IGARSS), IEEE International Symposium, 2018, vol. IGARSS 2018, p. 5991-5994
dc.subject	Vegetació
dc.subject	Pigments
dc.title	Photoprotection dynamics observed at leaf level from fast temporal reflectance changes
dc.type	journal article	es_ES
dc.date.updated	2019-02-05T15:22:24Z
dc.identifier.doi	10.1109/IGARSS.2018.8518539
dc.identifier.idgrec	129732
dc.rights.accessRights	open access	es_ES