| Hydraulic properties and drought response of a tropical bamboo ( Cephalostachyum pergracile ) | |
Kongjarat, Wanwalee; Han, Lu; Aritsara, Amy Ny Aina; Zhang, Shu-Bin; Zhao, Gao -Juan; Zhang, Yong-Jiang ; Maenpuen, Phisamai; Li, Ying-Mei; Zou, Yi-Ke; Li, Ming -Yi; Li, Xue-Nan; Tao, Lian-Bin; Chen, Ya-Jun
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| 2024 | |
| Source Publication | PLANT DIVERSITY
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| ISSN | 2096-2703 |
| Volume | 46Issue:3Pages:406_415 |
| Abstract | Bamboo plants are an essential component of tropical ecosystems, yet their vulnerability to climate extremes, such as drought, is poorly understood due to limited knowledge of their hydraulic properties. Cephalostachyum pergracile , a commonly used tropical bamboo species, exhibited a substantially higher mortality rate than other co-occurring bamboos during a severe drought event in 2019, but the underlying mechanisms remain unclear. This study investigated the leaf and stem hydraulic traits related to drought responses, including leaf-stem embolism resistance (P 50leaf ; P 50stem ) estimated using optical and X-ray microtomography methods, leaf pressure -volume and water-releasing curves. Additionally, we investigated the seasonal water potentials, native embolism level (PLC) and xylem water source using stable isotope. We found that C . pergracile exhibited strong resistance to embolism, showing low P 50leaf , P 50stem , and turgor loss point, despite its rapid leaf water loss. Interestingly, its leaves displayed greater resistance to embolism than its stem, suggesting a lack of effective hydraulic vulnerability segmentation (HVS) to protect the stem from excessive xylem tension. During the dry season, approximately 49% of the water was absorbed from the upper 20 -cm -deep soil layer. Consequently, signi ficant diurnal variation in leaf water potentials and an increase in midday PLC from 5.87 +/- 2.33% in the wet season to 12.87 +/- 4.09% in the dry season were observed. In summary, this study demonstrated that the rapid leaf water loss, high reliance on surface water, and a lack of effective HVS in C . pergracile accelerated water depletion and increased xylem embolism even in the typical dry season, which may explain its high mortality rate during extreme drought events in 2019. Copyright (c) 2023 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| Keyword | Climate change Drought Hydraulic safety Hydraulic vulnerability segmentation Stable isotope Tree mortality |
| Subject Area | Plant Sciences |
| DOI | 10.1016/j.pld.2023.12.003 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001235376900001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/14273 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.[Kongjarat, Wanwalee 2.Han, Lu 3.Aritsara, Amy Ny Aina 4.Zhang, Shu-Bin 5.Zhao, Gao -Juan 6.Maenpuen, Phisamai 7.Zou, Yi-Ke 8.Li, Ming -Yi 9.Li, Xue-Nan 10.Tao, Lian-Bin 11.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Kunming 666303, Yunnan, Peoples R China 12.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 13.[Aritsara, Amy Ny Aina 14.Chinese Acad Sci, T STAR Core Team, Xishuangbanna Trop Bot Garden, Kunming 666303, Yunnan, Peoples R China 15.Univ Maine, Sch Biol & Ecol, Orono, ME USA 16.Univ Maine, Climate Change Inst, Orono, ME 04469 USA 17.Puer Univ, Sch Biol & Chem Sci, Xueyuan Rd, Puer 665000, Yunnan, Peoples R China 18.Yunnan Univ, Inst Ecol & Geobot, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China 19.Southwest Forestry Univ, Sch Ecol & Environm, Kunming 650224, Yunnan, Peoples R China 20.Chinese Acad Sci, Yuanjiang Savanna Ecosyst Res Stn, Xishuangbanna Trop Bot Garden, Yuanjiang 653300, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | Kongjarat, Wanwalee,Han, Lu,Aritsara, Amy Ny Aina,et al. Hydraulic properties and drought response of a tropical bamboo ( Cephalostachyum pergracile )[J]. PLANT DIVERSITY,2024,46(3):406_415. |
| APA | Kongjarat, Wanwalee.,Han, Lu.,Aritsara, Amy Ny Aina.,Zhang, Shu-Bin.,Zhao, Gao -Juan.,...&Chen, Ya-Jun.(2024).Hydraulic properties and drought response of a tropical bamboo ( Cephalostachyum pergracile ).PLANT DIVERSITY,46(3),406_415. |
| MLA | Kongjarat, Wanwalee,et al."Hydraulic properties and drought response of a tropical bamboo ( Cephalostachyum pergracile )".PLANT DIVERSITY 46.3(2024):406_415. |
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