Papers by Juan Pedro Ferrio
HAL (Le Centre pour la Communication Scientifique Directe), Dec 8, 2019
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DOAJ (DOAJ: Directory of Open Access Journals), 2006
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EGUGA, Apr 1, 2016
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Tree Physiology, Apr 15, 2016
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Forest Systems, Apr 1, 2015
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European Journal of Forest Research, Oct 23, 2018
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Plant Cell and Environment, Mar 30, 2017
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Management of Environmental Quality: An International Journal, Mar 1, 2003
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EGUGA, May 1, 2014
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Investigación agraria, Dec 1, 2005
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European Journal of Plant Pathology, Nov 28, 2013
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Agricultural and Forest Meteorology
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The existence of sclerophyllous plants has been considered an adaptive strategy against different... more The existence of sclerophyllous plants has been considered an adaptive strategy against different environmental stresses. As it literally means “hard-leaved”, it is essential to quantify the leaf mechanical properties to understand sclerophylly. However, the relative importance of each leaf trait on mechanical properties is not yet well established. The genusQuercusis an excellent system to shed light on this since it minimizes phylogenetic variation while having a wide variation in sclerophylly. Thus, leaf anatomical traits and cell wall composition were measured, analyzing their relationship with LMA and leaf mechanical properties in a set of 25 oak species. Outer wall contributed strongly to leaf mechanical strength. Moreover, cellulose plays a critical role in increasing leaf strength and toughness. The PCA plot based on leaf trait values clearly separatedQuercusspecies into two groups corresponding to evergreen and deciduous species. SclerophyllousQuercusspecies are tougher and...
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Tree Physiology
Leaves of Mediterranean evergreen tree species experience a reduction in net CO2 assimilation (AN... more Leaves of Mediterranean evergreen tree species experience a reduction in net CO2 assimilation (AN) and mesophyll conductance to CO2 (gm) during aging and senescence, which would be influenced by changes in leaf anatomical traits at cell level. Anatomical modifications can be accompanied by the dismantling of photosynthetic apparatus associated to leaf senescence, manifested through changes at the biochemical level (i.e., lower nitrogen investment in photosynthetic machinery). However, the role of changes in leaf anatomy at cell level and nitrogen content in gm and AN decline experienced by old non-senescent leaves of evergreen trees with long leaf lifespan is far from being elucidated. We evaluated age-dependent changes in morphological, anatomical, chemical and photosynthetic traits in Quercus ilex subsp. rotundifolia Lam., an evergreen oak with high leaf longevity. All photosynthetic traits decreased with increasing leaf age. The relative change in cell wall thickness (Tcw) was le...
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EGU General Assembly Conference Abstracts, May 1, 2014
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Frontiers in Plant Science, 2022
The search for a universal explanation of the altitudinal limit determined by the alpine treeline... more The search for a universal explanation of the altitudinal limit determined by the alpine treeline has given rise to different hypotheses. In this study, we revisited Michaelis’ hypothesis which proposed that an inadequate “ripening” of the cuticle caused a greater transpiration rate during winter in the treeline. However, few studies with different explanations have investigated the role of passive mechanisms of needles for protecting against water loss during winter in conifers at the treeline. To shed light on this, the cuticular transpiration barrier was studied in the transition from subalpine Pinus uncinata forests to alpine tundra at the upper limit of the species in the Pyrenees. This upper limit of P. uncinata was selected here as an example of the ecotones formed by conifers in the temperate mountains of the northern hemisphere. Our study showed that minimum leaf conductance in needles from upper limit specimens was higher than those measured in specimens living in the lowe...
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Flora, 2022
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New Phytologist, 2022
SummaryWe compiled hydrogen and oxygen stable isotope compositions (δ2H and δ18O) of leaf water f... more SummaryWe compiled hydrogen and oxygen stable isotope compositions (δ2H and δ18O) of leaf water from multiple biomes to examine variations with environmental drivers. Leaf water δ2H was more closely correlated with δ2H of xylem water or atmospheric vapour, whereas leaf water δ18O was more closely correlated with air relative humidity. This resulted from the larger proportional range for δ2H of meteoric waters relative to the extent of leaf water evaporative enrichment compared with δ18O. We next expressed leaf water as isotopic enrichment above xylem water (Δ2H and Δ18O) to remove the impact of xylem water isotopic variation. For Δ2H, leaf water still correlated with atmospheric vapour, whereas Δ18O showed no such correlation. This was explained by covariance between air relative humidity and the Δ18O of atmospheric vapour. This is consistent with a previously observed diurnal correlation between air relative humidity and the deuterium excess of atmospheric vapour across a range of ...
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Science of The Total Environment, 2020
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Papers by Juan Pedro Ferrio