Tags

Type your tag names separated by a space and hit enter

Increased root investment can explain the higher survival of seedlings of 'mesic' Quercus suber than 'xeric' Quercus ilex in sandy soils during a summer drought.
Tree Physiol. 2019 01 01; 39(1):64-75.TP

Abstract

In Mediterranean-type ecosystems, drought is considered the main ecological filter for seedling establishment. The evergreen oaks Quercus ilex L. and Quercus suber L. are two of the most abundant tree species in the Mediterranean Basin. Despite their shared evergreen leaf habit and ability to resist low soil water potentials, traditionally it has been suggested that Q. ilex is better suited to resist dry conditions than Q. suber. In this study, we examined how seedlings of Q. ilex and Q. suber grown in sandy soils responded to different levels of water availability using natural dry conditions and supplemental watering. Specifically, we estimated survival and water status of seedlings and explored the role of acorn mass and belowground biomass in seedling performance. To our surprise, Q. suber was better able to survive the summer drought in our experiment than Q. ilex. Nearly 55% of the Q. suber seedlings remained alive after a 2-month period without rain or supplemental water, which represents almost 20% higher survival than Q. ilex over the same period. At the end of the dry period, the surviving seedlings of Q. suber had strikingly higher water potential, potential maximum quantum yield of photosystem II (Fv/Fm) and stomatal conductance (gs) than those of Q. ilex. Acorn mass was associated with the probability of survival under dry conditions; however, it did not explain the differences in survival or water status between the species. In contrast, Q. suber had a higher root ratio and root:shoot ratio than Q. ilex and these traits were positively associated with predawn leaf water potential, Fv/Fm, gs and survival. Taken together, our results suggest that the higher relative investment in roots by Q. suber when growing in a sandy acidic substrate allowed this species to maintain better physiological status and overall condition than Q. ilex, increasing its probability of survival in dry conditions.

Authors+Show Affiliations

Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Centro de Investigación Forestal, Carretera Coruña Km 7.5, E-28040 Madrid, Spain.Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Centro de Investigación Forestal, Carretera Coruña Km 7.5, E-28040 Madrid, Spain.Instituto Regional de Investigación, Desarrollo Agroalimentario y Forestal de Castilla-La Mancha (IRIAF), Centro de Investigación Agroforestal de Albaladejito (CIAF), Carretera Toledo-Cuenca, Km 174, Cuenca, Spain.Forest History, Physiology and Genetics Research Group, School of Forestry Engineering, Technical University of Madrid, Madrid, Spain.Museo Nacional de Ciencias Naturales, CSIC, Serrano 115, Madrid, Spain. Departamento de Biología y Geología, Escuela Superior de Ciencias Experimentales y Tecnológicas, Universidad Rey Juan Carlos, c/ Tulipán s/n, Móstoles, Spain.Viikki Plant Science Centre (ViPS), Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30099558

Citation

Ramírez-Valiente, José-Alberto, et al. "Increased Root Investment Can Explain the Higher Survival of Seedlings of 'mesic' Quercus Suber Than 'xeric' Quercus Ilex in Sandy Soils During a Summer Drought." Tree Physiology, vol. 39, no. 1, 2019, pp. 64-75.
Ramírez-Valiente JA, Aranda I, Sanchéz-Gómez D, et al. Increased root investment can explain the higher survival of seedlings of 'mesic' Quercus suber than 'xeric' Quercus ilex in sandy soils during a summer drought. Tree Physiol. 2019;39(1):64-75.
Ramírez-Valiente, J. A., Aranda, I., Sanchéz-Gómez, D., Rodríguez-Calcerrada, J., Valladares, F., & Robson, T. M. (2019). Increased root investment can explain the higher survival of seedlings of 'mesic' Quercus suber than 'xeric' Quercus ilex in sandy soils during a summer drought. Tree Physiology, 39(1), 64-75. https://doi.org/10.1093/treephys/tpy084
Ramírez-Valiente JA, et al. Increased Root Investment Can Explain the Higher Survival of Seedlings of 'mesic' Quercus Suber Than 'xeric' Quercus Ilex in Sandy Soils During a Summer Drought. Tree Physiol. 2019 01 1;39(1):64-75. PubMed PMID: 30099558.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Increased root investment can explain the higher survival of seedlings of 'mesic' Quercus suber than 'xeric' Quercus ilex in sandy soils during a summer drought. AU - Ramírez-Valiente,José-Alberto, AU - Aranda,Ismael, AU - Sanchéz-Gómez,David, AU - Rodríguez-Calcerrada,Jesús, AU - Valladares,Fernando, AU - Robson,T Matthew, PY - 2018/02/01/received PY - 2018/07/10/accepted PY - 2018/8/14/pubmed PY - 2019/4/5/medline PY - 2018/8/13/entrez SP - 64 EP - 75 JF - Tree physiology JO - Tree Physiol. VL - 39 IS - 1 N2 - In Mediterranean-type ecosystems, drought is considered the main ecological filter for seedling establishment. The evergreen oaks Quercus ilex L. and Quercus suber L. are two of the most abundant tree species in the Mediterranean Basin. Despite their shared evergreen leaf habit and ability to resist low soil water potentials, traditionally it has been suggested that Q. ilex is better suited to resist dry conditions than Q. suber. In this study, we examined how seedlings of Q. ilex and Q. suber grown in sandy soils responded to different levels of water availability using natural dry conditions and supplemental watering. Specifically, we estimated survival and water status of seedlings and explored the role of acorn mass and belowground biomass in seedling performance. To our surprise, Q. suber was better able to survive the summer drought in our experiment than Q. ilex. Nearly 55% of the Q. suber seedlings remained alive after a 2-month period without rain or supplemental water, which represents almost 20% higher survival than Q. ilex over the same period. At the end of the dry period, the surviving seedlings of Q. suber had strikingly higher water potential, potential maximum quantum yield of photosystem II (Fv/Fm) and stomatal conductance (gs) than those of Q. ilex. Acorn mass was associated with the probability of survival under dry conditions; however, it did not explain the differences in survival or water status between the species. In contrast, Q. suber had a higher root ratio and root:shoot ratio than Q. ilex and these traits were positively associated with predawn leaf water potential, Fv/Fm, gs and survival. Taken together, our results suggest that the higher relative investment in roots by Q. suber when growing in a sandy acidic substrate allowed this species to maintain better physiological status and overall condition than Q. ilex, increasing its probability of survival in dry conditions. SN - 1758-4469 UR - https://www.unboundmedicine.com/medline/citation/30099558/Increased_root_investment_can_explain_the_higher_survival_of_seedlings_of_'mesic'_Quercus_suber_than_'xeric'_Quercus_ilex_in_sandy_soils_during_a_summer_drought_ L2 - https://academic.oup.com/treephys/article-lookup/doi/10.1093/treephys/tpy084 DB - PRIME DP - Unbound Medicine ER -