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| DOI | 10.1111/nph.19669 |
| Spectral ecophysiology: hyperspectral pressure-volume curves to estimate leaf turgor loss | |
| 发表日期 | 2024 |
| ISSN | 0028-646X |
| EISSN | 1469-8137 |
| 起始页码 | 242 |
| 结束页码 | 3 |
| 卷号 | 242期号:3 |
| 英文摘要 | Turgor loss point (TLP) is an important proxy for plant drought tolerance, species habitat suitability, and drought-induced plant mortality risk. Thus, TLP serves as a critical tool for evaluating climate change impacts on plants, making it imperative to develop high-throughput and in situ methods to measure TLP. We developed hyperspectral pressure-volume curves (PV curves) to estimate TLP using leaf spectral reflectance. We used partial least square regression models to estimate water potential (psi) and relative water content (RWC) for two species, Frangula caroliniana and Magnolia grandiflora. RWC and psi's model for each species had R-2 >= 0.7 and %RMSE = 7-10. We constructed PV curves with model estimates and compared the accuracy of directly measured and spectra-predicted TLP. Our findings indicate that leaf spectral measurements are an alternative method for estimating TLP. F. caroliniana TLP's values were -1.62 +/- 0.15 (means +/- SD) and -1.62 +/- 0.34 MPa for observed and reflectance predicted, respectively (P > 0.05), while M. grandiflora were -1.78 +/- 0.34 and -1.66 +/- 0.41 MPa (P > 0.05). The estimation of TLP through leaf reflectance-based PV curves opens a broad range of possibilities for future research aimed at understanding and monitoring plant water relations on a large scale with spectral ecophysiology. |
| 英文关键词 | climate change; drought; leaf traits; leaf water content; sensing; spectral reflectance; water potential; water relations |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001184226100001 |
| 来源期刊 | NEW PHYTOLOGIST
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/288247 |
| 作者单位 | State University System of Florida; University of Florida; State University System of Florida; University of Florida; State University System of Florida; University of Florida |
| 推荐引用方式 GB/T 7714 | . Spectral ecophysiology: hyperspectral pressure-volume curves to estimate leaf turgor loss[J],2024,242(3). |
| APA | (2024).Spectral ecophysiology: hyperspectral pressure-volume curves to estimate leaf turgor loss.NEW PHYTOLOGIST,242(3). |
| MLA | "Spectral ecophysiology: hyperspectral pressure-volume curves to estimate leaf turgor loss".NEW PHYTOLOGIST 242.3(2024). |
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