Grant support

This research was funded by Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA) grant number RTA2015-00054-C02-01 and by Gobierno de Aragon grant number PETRA R+D PLATEA FITE 2017. Research of D. S. K. is supported by a DOC INIA-CCAA contract co-funded by INIA and European Social Fund.

Análisis de autorías institucional
Gil Pelegrín, Eustaquio - Autor o Coautor
Sancho Knapik, Domingo - Autor o Coautor
Peguero Pina, Jose Javier - Autor o Coautor
Publicaciones > Artículo

Chl Fluorescence Parameters and Leaf Reflectance Indices Allow Monitoring Changes in the Physiological Status of Quercus ilex L. under Progressive Water Deficit

Publicado en:Forests. 9 (7): - 2018-07-04 9(7), doi: 10.3390/f9070400

Gil Pelegrín, Eustaquio; Sancho Knapik, Domingo; Peguero Pina, Jose Javier;


Centro de Investigación y Tecnología Agroalimentaria de Aragón - Entidad de origen
Ctr Invest & Tecnol Agroalimentaria Aragon, Unidad Recursos Forestales, Avda Montanana 930, Zaragoza 50059, Spain - Autor o Coautor
DOC INIA-CCAA contract - INIA and European Social Fund - Financiador
Gobierno de AragonGobierno de Aragon [PETRA R+D PLATEA FITE 2017] - Financiador
Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)Instituto de Investigacion Agropecuaria (INIA) [RTA2015-00054-C02-01] - Financiador
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Resúmen: Extreme droughts and heat events, frequently produced in Mediterranean climates, induce anomalies in the ecosystem-atmosphere CO2 fluxes. In order to mitigate the consequences on forests and agriculture, managers must have a better knowledge of the ecosystem by monitoring plant status. Water status is commonly observed measuring water potential but when the extreme event is over, this parameter cannot show managers the recovery of other physiological processes such as photosynthesis. To address this problem, we have evaluated the Quercus ilex L. water status and photosynthetic capacity throughout an intense water scarcity event and a subsequent re-watering. Photosynthetic capacity was evaluated through chlorophyll fluorescence parameters and leaf reflectance indices. We found that all fluorescence parameters changed as water potential decreased and they did not completely recover after re-watering. Among the reflectance indices, the physiological reflectance index (PRI) varied similarly to fluorescence, obtaining a strong correlation with the non-photochemical quenching (NPQ). We proposed using PRI to detect the level of photosynthetic capacity in Q. ilex, as it is much easier-to-handle. We also concluded that intense droughts and heat stress not only might reduce photosynthetic capacity through changes in Chl fluorescence parameters during the stress period, but might also affect photosynthetic capacity once the plant water status is recovered.

Palabras clave: Absorbency changes; Beta-vulgaris l; Chlorophyll fluorescence; Drought; Photosynthetic performance; Photosystem-ii; Quercus ilex; Radiation-use-efficiency; Red edge position; Reflectance; Spectral reflectance; Thermal-energy dissipation; Water potential; Xanthophyll cycle

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