Climate Change Data Portal
| DOI | 10.1093/plphys/kiae239 |
| Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture | |
| 发表日期 | 2024 |
| ISSN | 0032-0889 |
| EISSN | 1532-2548 |
| 英文摘要 | Species mixture is promoted as a crucial management option to adapt forests to climate change. However, there is little consensus on how tree diversity affects tree water stress, and the underlying mechanisms remain elusive. By using a greenhouse experiment and a soil-plant-atmosphere hydraulic model, we explored whether and why mixing the isohydric Aleppo pine (Pinus halepensis, drought avoidant) and the anisohydric holm oak (Quercus ilex, drought tolerant) affects tree water stress during extreme drought. Our experiment showed that the intimate mixture strongly alleviated Q. ilex water stress while it marginally impacted P. halepensis water stress. Three mechanistic explanations for this pattern are supported by our modeling analysis. First, the difference in stomatal regulation between species allowed Q. ilex trees to benefit from additional soil water in mixture, thereby maintaining higher water potentials and sustaining gas exchange. By contrast, P. halepensis exhibited earlier water stress and stomatal regulation. Second, P. halepensis trees showed stable water potential during drought, although soil water potential strongly decreased, even when grown in a mixture. Model simulations suggested that hydraulic isolation of the root from the soil associated with decreased leaf cuticular conductance was a plausible explanation for this pattern. Third, the higher predawn water potentials for a given soil water potential observed for Q. ilex in mixture can-according to model simulations-be explained by increased soil-to-root conductance, resulting from higher fine root length. This study brings insights into the mechanisms involved in improved drought resistance of mixed species forests. A mixture of trees with opposite drought response strategies (isohydric or anisohydric) greatly reduces the risk of hydraulic failure compared to monocultures. |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001236138900001 |
| 来源期刊 | PLANT PHYSIOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300317 |
| 作者单位 | INRAE; Universite Clermont Auvergne (UCA); INRAE; INRAE; Institut Agro; Montpellier SupAgro; CIRAD; Institut de Recherche pour le Developpement (IRD); Institut Agro; Montpellier SupAgro; CIRAD; Institut de Recherche pour le Developpement (IRD); Universite de Montpellier; INRAE; Universidade de Sao Paulo; Universite de Bordeaux; INRAE |
| 推荐引用方式 GB/T 7714 | . Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture[J],2024. |
| APA | (2024).Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture.PLANT PHYSIOLOGY. |
| MLA | "Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture".PLANT PHYSIOLOGY (2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
