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| DOI | 10.1093/jxb/erae030 |
| The mobilization and transport of newly fixed carbon are driven by plant water use in an experimental rainforest under drought | |
| 发表日期 | 2024 |
| ISSN | 0022-0957 |
| EISSN | 1460-2431 |
| 起始页码 | 75 |
| 结束页码 | 8 |
| 卷号 | 75期号:8 |
| 英文摘要 | Non-structural carbohydrates (NSCs) are building blocks for biomass and fuel metabolic processes. However, it remains unclear how tropical forests mobilize, export, and transport NSCs to cope with extreme droughts. We combined drought manipulation and ecosystem 13CO2 pulse-labeling in an enclosed rainforest at Biosphere 2, assessed changes in NSCs, and traced newly assimilated carbohydrates in plant species with diverse hydraulic traits and canopy positions. We show that drought caused a depletion of leaf starch reserves and slowed export and transport of newly assimilated carbohydrates below ground. Drought effects were more pronounced in conservative canopy trees with limited supply of new photosynthates and relatively constant water status than in those with continual photosynthetic supply and deteriorated water status. We provide experimental evidence that local utilization, export, and transport of newly assimilated carbon are closely coupled with plant water use in canopy trees. We highlight that these processes are critical for understanding and predicting tree resistance and ecosystem fluxes in tropical forest under drought. The mechanisms underlying drought-induced changes in allocation of newly assimilated carbohydrates differ between water-saving and water-spending canopy trees, revealed by an ecosystem-scale 13 CO2 pulse-labeling experiment in the Biosphere 2 rainforest. |
| 英文关键词 | Carbon allocation; drought and climate change; ecosystem isotopic labeling; non-structural carbohydrate storage; plant hydraulics; tropical forests |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001164558200001 |
| 来源期刊 | JOURNAL OF EXPERIMENTAL BOTANY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/296181 |
| 作者单位 | Max Planck Society; University of Freiburg; University of Basel; University of Innsbruck; University of Arizona; University of Arizona; University of Arizona; University of Bayreuth; University of Arizona; University of California System; University of California Davis; University of Gottingen; Eberhard Karls University of Tubingen; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Estacion Experimental de Zonas Aridas (EEZA); Julius Kuhn-Institut; Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research |
| 推荐引用方式 GB/T 7714 | . The mobilization and transport of newly fixed carbon are driven by plant water use in an experimental rainforest under drought[J],2024,75(8). |
| APA | (2024).The mobilization and transport of newly fixed carbon are driven by plant water use in an experimental rainforest under drought.JOURNAL OF EXPERIMENTAL BOTANY,75(8). |
| MLA | "The mobilization and transport of newly fixed carbon are driven by plant water use in an experimental rainforest under drought".JOURNAL OF EXPERIMENTAL BOTANY 75.8(2024). |
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