Quantifying vulnerability to embolism in tropical trees and lianas using five methods: can discrepancies be explained by xylem structural traits? | |
Chen, Ya-Jun; Maenpuen, Phisamai4; Zhang, Yong-Jiang; Barai, Kallol5; Katabuchi, Masatoshi; Gao, Hui4; Kaewkamol, Sasiwimol4; Tao, Lian-Bin; Zhang, Jiao-Lin | |
刊名 | NEW PHYTOLOGIST |
2021 | |
卷号 | 229期号:2页码:805_819 |
关键词 | cavitation resistance drought tolerance embolism hydraulic architecture lianas tree mortality X‐ ray MicroCT |
ISSN号 | 0028-646X |
DOI | 10.1111/nph.16927 |
英文摘要 | Vulnerability curves (VCs) describe the loss of hydraulic conductance against increasing xylem tension, providing valuable insights about the response of plant water transport to water stress. Techniques to construct VCs have been developed and modified continuously, but controversies continue. We compared VCs constructed using the bench-top dehydration (BD), air-injection-flow (AI), pneumatic-air-discharge (PAD), optical (OP) and X-ray-computed microtomography (MicroCT) methods for tropical trees and lianas with contrasting vessel lengths. The PAD method generated highly vulnerable VCs, the AI method intermediate VCs, whereas the BD, OP and MicroCT methods produced comparable and more resistant VCs. Vessel-length and diameter accounted for the overestimation ratio of vulnerability estimated using the AI but not the PAD method. Compared with directly measured midday embolism levels, the PAD and AI methods substantially overestimated embolism, whereas the BD, MicroCT and OP methods provided more reasonable estimations. Cut-open vessels, uncertainties in maximum air volume estimations, sample-length effects, tissue cracks and shrinkage together may impede the reliability of the PAD method. In conclusion, we validate the BD, OP and MicroCT methods for tropical plants, whereas the PAD and AI need further mechanistic testing. Therefore, applications of VCs in estimating plant responses to drought need to be cautious. |
学科主题 | Plant Sciences |
语种 | 英语 |
WOS记录号 | WOS:000583519900001 |
内容类型 | 期刊论文 |
源URL | [http://ir.xtbg.org.cn/handle/353005/11919] |
专题 | 西双版纳热带植物园_植物生理生态研究组 |
作者单位 | 1.Univ Maine, Sch Biol & Ecol, Orono, ME 04469 USA 2.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China 4.Chinese Acad Sci, Yuanjiang Savanna Ecosyst Res Stn, Xishuangbanna Trop Bot Garden, Yuanjiang 653300, Yunnan, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Ya-Jun,Maenpuen, Phisamai,Zhang, Yong-Jiang,et al. Quantifying vulnerability to embolism in tropical trees and lianas using five methods: can discrepancies be explained by xylem structural traits?[J]. NEW PHYTOLOGIST,2021,229(2):805_819. |
APA | Chen, Ya-Jun.,Maenpuen, Phisamai.,Zhang, Yong-Jiang.,Barai, Kallol.,Katabuchi, Masatoshi.,...&Zhang, Jiao-Lin.(2021).Quantifying vulnerability to embolism in tropical trees and lianas using five methods: can discrepancies be explained by xylem structural traits?.NEW PHYTOLOGIST,229(2),805_819. |
MLA | Chen, Ya-Jun,et al."Quantifying vulnerability to embolism in tropical trees and lianas using five methods: can discrepancies be explained by xylem structural traits?".NEW PHYTOLOGIST 229.2(2021):805_819. |
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