Oaks Under Mediterranean-Type Climates: Functional Response to Summer Aridity

Gil‐Pelegrín, Eustaquio; Saz, Miguel Ángel; Cuadrat, José María; Peguero‐Pina, José Javier; Sancho‐Knapik, Domingo

doi:10.1007/978-3-319-69099-5_5

Cited by 32 publications

(29 citation statements)

References 292 publications

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“…Both leaf damage and seedling death were higher and more rapid in the deciduous oak species (Q. pyrenaica, Q. faginea, and Q. robur) than in the evergreen oak species (Q. suber and Q. ilex), as previously reported by [54]. Both leaf morphology and structure may be related to different mechanisms to cope with tolerance to drought.…”

Section: Drought Visual Symptoms and Mortality Rate As Indicators Of Drought Tolerancesupporting

confidence: 79%

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Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

San-Eufrasio

Sánchez-Lucas

López-Hidalgo

et al. 2020

Forests

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Analyzing differences in tolerance to drought in Quercus spp., and the characterization of these responses at the species and individual population level, are imperative for the selection of resilient elite genotypes in reforestation programs. The main objective of this work was to evaluate differences in the response and tolerance to water shortage under in five Quercus spp. and five Andalusian Q. ilex populations at the inter- and intraspecies level. Six-month-old seedlings grown in perlite were subjected to drought treatments by withholding water for 28 days under mean 37 °C temperature, 28 W m−2 solar irradiance, and 41% humidity. The use of perlite as the substrate enabled the establishment of severe drought stress with reduction in water availability from 73% (field capacity) to 28% (dryness), corresponding to matric potentials of 0 and −30 kPa. Damage symptoms, mortality rate, leaf water content, photosynthetic, and biochemical parameters (amino acids, sugars, phenolics, and pigments) were determined. At the phenotypic level, based on damage symptoms and mortality, Q. ilex behaved as the most drought tolerant species. Drought caused a significant decrease in leaf fluorescence, photosynthesis rate, and stomatal conductance in all Quercus spp. analyzed, being less pronounced in Q. ilex. There were not differences between irrigated and non-irrigated Q. ilex seedlings in the content of sugar and photosynthetic pigments, while the total amino acid and phenolic content significantly increased under drought conditions. As a response to drought, living Q. ilex seedlings adjust stomata opening and gas exchange, and keep hydrated, photosynthetically active, and metabolically competent. At the population level, based on damage symptoms, mortality, and physiological parameters, the eastern Andalusian populations were more tolerant than the western ones. These observations inform the basis for the selection of resilient genotypes to be used in breeding and reforestation programs.

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Section: Drought Visual Symptoms and Mortality Rate As Indicators Of Drought Tolerancesupporting

confidence: 79%

“…54 46 N, 4 • 43 15 O in July 2018 for 28 days (Table 1). Cordoba is under Mediterranean climate with 36 • C and 19 • C maximum and minimum temperatures, respectively, 28 W m-2 solar irradiance, and 42% relative humidity in July over the period 2005-2019.…”

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confidence: 99%

Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

San-Eufrasio

Sánchez-Lucas

López-Hidalgo

et al. 2020

Forests

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“…So far, H. almeriense physiology has been studied mainly because of its interest as the host species for the cultivation of T. claveryi , focusing solely on its adaptation traits to arid environments and its responses to water‐stress (Morte et al 2000, 2010, Navarro‐Ródenas et al 2012, 2013, Marqués‐Gálvez et al 2019), which is considered the primary environmental constraint to the productivity and distribution of Mediterranean vegetation (Gil‐Pelegrín et al 2017). In this study we have evidenced that atmospheric CO 2 in combination with these important seasonal conditions influences the physiology of the mycorrhizal plant as a whole (Fig.…”

Section: Discussionmentioning

confidence: 99%

Elevated atmospheric CO₂ modifies responses to water‐stress and flowering of Mediterranean desert truffle mycorrhizal shrubs

Marqués‐Gálvez

Navarro‐Ródenas

Peguero‐Pina

et al. 2020

Physiologia Plantarum

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Predicted increases in atmospheric concentration of carbon dioxide (CO 2) coupled with increased temperatures and drought are expected to strongly influence the development of most of the plant species in the world, especially in areas with high risk of desertification like the Mediterranean basin. Helianthemum almeriense is an ecologically important Mediterranean shrub with an added interest because it serves as the host for the Terfezia claveryi mycorrhizal fungus, which is a desert truffle with increasingly commercial interest. Although both plant and fungi are known to be well adapted to dry conditions, it is still uncertain how the increase in atmospheric CO 2 will influence them. In this article we have addressed the physiological responses of H. almeriense × T. claveryi mycorrhizal plants to increases in atmospheric CO 2 coupled with drought and high vapor pressure deficit. This work reports one of the few estimations of mesophyll conductance in a drought deciduous Mediterranean shrub and evaluates its role in photosynthesis limitation. High atmospheric CO 2 concentrations help desert truffle mycorrhizal plants to cope with the adverse effects of progressive drought during Mediterranean springs by improving carbon net assimilation, intrinsic water use efficiency and dispersal of the species through increased flowering events.

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“…Climatic information (bioclimatic variables; mean monthly temperature, t m ; and monthly precipitation, p m ) of species natural distributions was obtained from the WorldClim database (http://www.worldclim.org/) using geographical distribution coordinates obtained from herbarium data (Gil‐Pelegrín et al ., 2017). From this climatic information, we selected six climatic variables related to the duration and intensity of the seasonal stress, including cold and arid‐related variables.…”

Section: Methodsmentioning

confidence: 99%

“…We quantified 14 leaf anatomical, morphological and chemical traits in a set of 40 deciduous and 45 evergreen Quercus species growing in a common garden in northern Spain. On the one hand, the genus Quercus is an excellent system to perform this study, as it not only minimises phylogenetic variation (compared with studies performed across diverse species), but also displays strong variation in LMA across species adapted to a large variety of climatic conditions, from those in nemoral–temperate areas to those in Mediterranean or tropical environments (Gil‐Pelegrín et al ., 2017). Therefore, the genus Quercus constitutes a unique living laboratory to understand global adaptive patterns along the leaf economic spectrum in forest trees (Alonso‐Forn et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

Deciduous and evergreen oaks show contrasting adaptive responses in leaf mass per area across environments

Sancho‐Knapik

Escudero²,

Mediavilla³

et al. 2021

New Phytologist

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Summary Increases in leaf mass per area (LMA) are commonly observed in response to environmental stresses and are achieved through increases in leaf thickness and/or leaf density. Here, we investigated how the two underlying components of LMA differ in relation to species native climates and phylogeny, across deciduous and evergreen species. Using a phylogenetic approach, we quantified anatomical, compositional and climatic variables from 40 deciduous and 45 evergreen Quercus species from across the Northern Hemisphere growing in a common garden. Deciduous species from shorter growing seasons tended to have leaves with lower LMA and leaf thickness than those from longer growing seasons, while the opposite pattern was found for evergreens. For both habits, LMA and thickness increased in arid environments. However, this shift was associated with increased leaf density in evergreens but reduced density in deciduous species. Deciduous and evergreen oaks showed fundamental leaf morphological differences that revealed a diverse adaptive response. While LMA in deciduous species may have diversified in tight coordination with thickness mainly modulated by aridity, diversification of LMA within evergreens appears to be dependent on the infrageneric group, with diversification in leaf thickness modulated by both aridity and cold, while diversification in leaf density is only modulated by aridity.

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Oaks Under Mediterranean-Type Climates: Functional Response to Summer Aridity

Cited by 32 publications

References 292 publications

Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

Elevated atmospheric CO₂ modifies responses to water‐stress and flowering of Mediterranean desert truffle mycorrhizal shrubs

Deciduous and evergreen oaks show contrasting adaptive responses in leaf mass per area across environments

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Oaks Under Mediterranean-Type Climates: Functional Response to Summer Aridity

Cited by 32 publications

References 292 publications

Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

Responses and Differences in Tolerance to Water Shortage under Climatic Dryness Conditions in Seedlings from Quercus spp. and Andalusian Q. ilex Populations

Elevated atmospheric CO2 modifies responses to water‐stress and flowering of Mediterranean desert truffle mycorrhizal shrubs

Deciduous and evergreen oaks show contrasting adaptive responses in leaf mass per area across environments

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Elevated atmospheric CO₂ modifies responses to water‐stress and flowering of Mediterranean desert truffle mycorrhizal shrubs