Population differences in juvenile survival under increasing drought are mediated by seed size in cork oak (Quercus suber L.)

Ramírez‐Valiente, José Alberto; Valladares, Fernando; Gil, Luis; Aranda, Ismael

doi:10.1016/j.foreco.2009.01.024

Cited by 117 publications

(105 citation statements)

References 52 publications

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“…Population variability with respect to acorn morphology have been reported for Quercus ilex (Galvàn et al 2012), Q. glauca (Singh et al 2010), and Q. suber (Ramírez-Valiente et al 2009). In a study on thirteen populations of holm oak throughout Spain (Galvàn et al 2012), differences in acorn morphology between eastern and western provenances were reported, the latter showing also larger overall variation.…”

Section: Discussionmentioning

confidence: 97%

Germination and seedling growth of holm oak (Quercus ilex L.): effects of provenance, temperature, and radicle pruning

Çalışkan¹

2014

iForest

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Section: Discussionmentioning

confidence: 97%

Germination and seedling growth of holm oak (Quercus ilex L.): effects of provenance, temperature, and radicle pruning

Çalışkan¹

2014

iForest

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“…Cork oak density and tree distribution are closely related to water availability (Joffre et al 1999). Adaptations to local environmental conditions could drive cork oak population genetic divergence (Ramírez-Valiente et al 2009a), but the moderate capacity of this species to cope with severe drought could lead to the disappearance/scarceness of actual populations (Ramírez-Valiente et al 2009b). Since a reduction in water availability is expected in the near future (Giorgi and Lionello 2008), the long-term sustainability of these ecosystems may be further threatened, leading to a decrease in Q. suber growth and productivity (Moricca et al 2014;Acácio et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Ectomycorrhizal fungal diversity and community structure associated with cork oak in different landscapes

et al. 2018

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Cork oak (Quercus suber L.) forests play an important ecological and economic role. Ectomycorrhizal fungi (ECMF) are key components for the sustainability and functioning of these ecosystems. The community structure and composition of ECMF associated with Q. suber in different landscapes of distinct Mediterranean bioclimate regions have not previously been compared. In this work, soil samples from cork oak forests residing in different bioclimates (arid, semi-arid, sub-humid, and humid) were collected and surveyed for ectomycorrhizal (ECM) root tips. A global analysis performed on 3565 ECM root tips revealed that the ECMF community is highly enriched in Russula, Tomentella, and Cenoccocum, which correspond to the ECMF genera that mainly contribute to community differences. The ECMF communities from the rainiest and the driest cork oak forests were distinct, with soils from the rainiest climates being more heterogeneous than those from the driest climates. The analyses of several abiotic factors on the ECMF communities revealed that bioclimate, precipitation, soil texture, and forest management strongly influenced ECMF structure. Shifts in ECMF with different hyphal exploration types were also detected among forests, with precipitation, forest system, and soil texture being the main drivers controlling their composition. Understanding the effects of environmental factors on the structuring of ECM communities could be the first step for promoting the sustainability of this threatened ecosystem.

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“…This capacity for dynamic colonization has been attributed to its great adaptability (Eriksson et al, 1993), resulting from both genetic and physiological bases (Lauteri et al, 2004). These mechanisms are especially important in areas such as the Iberian Peninsula where great climatic changes are expected this century, (Ramírez-Valiente et al, 2009). Chestnut is mostly found in the western Iberian Peninsula, but with two clearly defined origins of genetic variation: one in the North (Asturias and Galicia) and a second in the Central Iberian Peninsula (Pereira-Lorenzo et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Adaptive diversity in Castanea sativa Mill. half-sib progenies in response to drought stress

Ciordia

Feito

Pereira‐Lorenzo

et al. 2012

Environmental and Experimental Botany

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a b s t r a c tVariation patterns in phenotypic expression after cultivation in two water regimes: 50% and 90% substrate saturation were studied in progenies of chestnut (Castanea sativa Mill.) cultivars originating from two main origins in the Iberian Peninsula: North (specifically from Asturias and Galicia) and Central Iberian Peninsula (specifically from the Canary Islands and Andalusia in Southern Spain related to this gene pool). The restricted water supply reduced the water potential of all the families as well as their growth, both in terms of height and weight. Root development increased whilst leaf area decreased as a result of reduction in number and surface area of individual leaves as well as sprouting rather than through defoliation. Drought stress also modified the morphology of the leaves and the relationships indicating the rate of relative development of the leaves compared to the rest of the plant. A correlation with the minimum summer rainfall in the regions of provenance was observed for several traits. The phenotypic variation observed was greater than expected from progenies of selected fruit cultivars. The results of this study show that (i) phenotypic variation exists between the two origins of variability corresponding to the two identified gene pools; (ii) the Northern group might be considered more tolerant to drought stress when considering plantlets' ability to recover water potential, though important phenotypic plasticity was found in both origins of variability; and (iii) the pattern of variation found in some physiological and morphological traits suggests that Spanish chestnut stands have great potential to respond to the expected increase in drought in the Iberian Peninsula over the present century.

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Population differences in juvenile survival under increasing drought are mediated by seed size in cork oak (Quercus suber L.)

Cited by 117 publications

References 52 publications

Germination and seedling growth of holm oak (Quercus ilex L.): effects of provenance, temperature, and radicle pruning

Germination and seedling growth of holm oak (Quercus ilex L.): effects of provenance, temperature, and radicle pruning

Ectomycorrhizal fungal diversity and community structure associated with cork oak in different landscapes

Adaptive diversity in Castanea sativa Mill. half-sib progenies in response to drought stress

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