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| DOI | 10.1016/j.stress.2024.100432 |
| Consistent geographical gradient of water use efficiency evidences local adaptations to drought across the complete latitudinal distribution of Quercus suber | |
| 发表日期 | 2024 |
| ISSN | 2667-064X |
| 起始页码 | 12 |
| 卷号 | 12 |
| 英文摘要 | Rationale: Increased aridity has led to drought-induced mortality or loss of health for many tree species. Of particular interest is to explore the response of the Mediterranean tree species cork oak ( Quercus suber ) to this declining phenomenon due to its severity and its large implications for the local economy and the provision of highly relevant ecosystem services. Approach: To assess geographical variations in the response to water stress, we analyzed under controlled conditions the effects of four watering levels and the resistance to a terminal drought on seedlings collected from nine populations covering the complete latitudinal distribution of the species. We explored the response of a number of physiological traits and markers of oxidative stress potentially related with drought-resistance. Findings: We found a highly plastic phenotypic response of most variables to water availability and a large influence of seedlings provenance in the drought-resistance strategies. Although the oxidative stress enzymes ruled out differential water stress throughout the distribution range, we found that seedlings from the southern limit are less vulnerable to drought than other populations. Southern seedlings adapted to xeric conditions displayed a larger sensitivity of stomata to changes in soil humidity and a higher water use efficiency. These physiological local adaptations coupled with larger acorn size in the southern populations, resulted in larger aboveground biomass and higher drought resistance at the southern distribution edge. Conclusions: Our data suggest that this evergreen tree species relies on its physiological plasticity to develop adaptative features that allows it to overcome water shortage and that southern populations hold genetic diversity that could improve the specie s adaptation in the forecasted drought context with relevant implications for conservation programs. |
| 英文关键词 | Cork oak; Drought resistance; Functional responses; Physiological traits; Climate change; Phenotypic plasticity |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001214390400001 |
| 来源期刊 | PLANT STRESS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/290105 |
| 作者单位 | University of Sevilla; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS) |
| 推荐引用方式 GB/T 7714 | . Consistent geographical gradient of water use efficiency evidences local adaptations to drought across the complete latitudinal distribution of Quercus suber[J],2024,12. |
| APA | (2024).Consistent geographical gradient of water use efficiency evidences local adaptations to drought across the complete latitudinal distribution of Quercus suber.PLANT STRESS,12. |
| MLA | "Consistent geographical gradient of water use efficiency evidences local adaptations to drought across the complete latitudinal distribution of Quercus suber".PLANT STRESS 12(2024). |
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