研究论文
热带亚热带喀斯特森林木本植物的水力脆弱性分割
展开
- 广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 南宁 530004
收稿日期: 2022-06-22
录用日期: 2023-02-15
网络出版日期: 2023-03-01
基金资助
国家自然科学基金(32060330)
Hydraulic vulnerability segmentation in woody plant species from tropical and subtropical karst forests
Expand
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Forestry, Guangxi University, Nanning 530004, China
Received date: 2022-06-22
Accepted date: 2023-02-15
Online published: 2023-03-01
Supported by
National Natural Science Foundation of China(32060330)
摘要
脆弱性分割是树木抗旱生理机制之一, 但是关于喀斯特干旱生境植物的脆弱性分割情况及其生理意义尚不明确。该研究以热带、亚热带喀斯特森林共57种典型木本植物为研究材料, 测定叶、茎脆弱性曲线以及最低水势, 计算叶和茎的脆弱性分割(P50leaf-stem; 数值越大代表脆弱性分割越强)以及水力安全边界, 比较不同类群P50leaf-stem的差异并分析其与水力安全边界的相关关系。结果表明: (1)该研究木本植物的P50leaf-stem范围为-1.28-4.63 MPa, 平均值为1.32 MPa, 其中49种植物的P50leaf-stem为正值(正向脆弱性分割); (2)灌木的P50leaf-stem显著大于乔木, 喀斯特山脊植物的P50leaf-stem显著大于山谷植物, 但是常绿和落叶植物之间的P50leaf-stem差异不显著; (3)在旱季时期, P50leaf-stem越大的植物, 其叶水力安全边界越小, 茎水力安全边界越大, 说明叶片发生栓塞有助于降低茎干木质部的水力风险。该研究证实脆弱性分割是大部分热带亚热带喀斯特木本植物应对干旱胁迫的重要水力机制。
本文引用格式
余俊瑞, 万春燕, 朱师丹 . 热带亚热带喀斯特森林木本植物的水力脆弱性分割[J]. 植物生态学报, 2023 , 47(11) : 1576 -1584 . DOI: 10.17521/cjpe.2022.0262
Abstract
Aims Vulnerability segmentation is one of physiological mechanisms underlying drought resistance for tree species. The aim of this study is to clarify the patterns of vulnerability segmentation and its physiological significance for woody species from drought-prone tropical and subtropical karst forests.
Methods A total of 57 typical woody species were selected from tropical and subtropical karst forests. We measured their leaf and stem vulnerability curves and minimum water potential to calculate vulnerability segmentation (P50leaf-stemis the difference in cavitation resistance between leaf and stem, with larger values indicating stronger vulnerability segmentation) and hydraulic safety margin. We compared the differences in P50leaf-stem between different plant taxa and explored the relationships between P50leaf-stem and hydraulic safety margin.
Important findings (1) The P50leaf-stem across the woody species ranged from -1.28 MPa to 4.63 MPa, with an average value of 1.32 MPa. Out of the 57 species, 49 species showed a positive P50leaf-stem. (2) Shrub species showed higher P50leaf-stem than tree species, and species from karst ridge showed higher P50leaf-stem than those from karst valley. However, there was no significant difference in P50leaf-stem between evergreen and deciduous species. (3) During the drought period, species with higher P50leaf-stem tended to have smaller leaf hydraulic safety margin but larger stem hydraulic safety margin, indicating that occurrence of cavitation in leaves can reduce hydraulic risks of stems. This study confirms that vulnerability segmentation is an important hydraulic strategy for most tropical and subtropical karst woody species to deal with drought stress.
参考文献
| [1] | Allen CD, Macalady AK, Chenchouni H, Bachelet D, McDowell N, Vennetier M, Kitzberger T, Rigling A, Breshears DD, Hogg EH, Gonzalez P, Fensham R, Zhang Z, Castro J, Demidova N, et al. (2010). A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests. Forest Ecology and Management, 259, 660-684. |
| [2] | Alonso-Forn D, Peguero-Pina JJ, Ferrio JP, Mencuccini M, Mendoza-Herrer ó, Sancho-Knapik D, Gil-Pelegrín E (2021). Contrasting functional strategies following severe drought in two Mediterranean oaks with different leaf habit: Quercus faginea and Quercus ilex subsp. rotundifolia. Tree Physiology, 41, 371-387. |
| [3] | Anderegg WRL, Klein T, Bartlett M, Sack L, Pellegrini AFA, Choat B, Jansen S (2016). Meta-analysis reveals that hydraulic traits explain cross-species patterns of drought- induced tree mortality across the globe. Proceedings of the National Academy of Sciences of the United States of America, 113, 5024-5029. |
| [4] | Anderegg WRL, Trugman AT, Badgley G, Konings AG, Shaw J (2020). Divergent forest sensitivity to repeated extreme droughts. Nature Climate Change, 10, 1091-1095. |
| [5] | Brodribb TJ, Cochard H (2009). Hydraulic failure defines the recovery and point of death in water-stressed conifers. Plant Physiology, 149, 575-584. |
| [6] | Brodribb TJ, Holbrook NM (2003). Stomatal closure during leaf dehydration, correlation with other leaf physiological traits. Plant Physiology, 132, 2166-2173. |
| [7] | Bucci SJ, Scholz FG, Goldstein G, Meinzer FC, Sternberg LDSL (2003). Dynamic changes in hydraulic conductivity in petioles of two savanna tree species: factors and mechanisms contributing to the refilling of embolized vessels. Plant, Cell & Environment, 26, 1633-1645. |
| [8] | Bucci SJ, Scholz FG, Peschiutta ML, Arias NS, Meinzer FC, Goldstein G (2013). The stem xylem of Patagonian shrubs operates far from the point of catastrophic dysfunction and is additionally protected from drought-induced embolism by leaves and roots. Plant, Cell & Environment, 36, 2163-2174. |
| [9] | Chen H, Li DJ, Xiao KC, Wang KL (2018). Soil microbial processes and resource limitation in karst and non-karst forests. Functional Ecology, 32, 1400-1409. |
| [10] | Chen YJ, Choat B, Sterck F, Maenpuen P, Katabuchi M, Zhang SB, Tomlinson KW, Oliveira RS, Zhang YJ, Shen JX, Cao KF, Jansen S (2021). Hydraulic prediction of drought- induced plant dieback and top-kill depends on leaf habit and growth form. Ecology Letters, 24, 2350-2363. |
| [11] | Choat B, Brodribb TJ, Brodersen CR, Duursma RA, López R, Medlyn BE (2018). Triggers of tree mortality under drought. Nature, 558, 531-539. |
| [12] | Choat B, Jansen S, Brodribb TJ, Cochard H, Delzon S, Bhaskar R, Bucci SJ, Feild TS, Gleason SM, Hacke UG, Jacobsen AL, Lens F, Maherali H, Martínez-Vilalta J, Mayr S, et al.(2012). Global convergence in the vulnerability of forests to drought. Nature, 491, 752-755. |
| [13] | Creek D, Blackman CJ, Brodribb TJ, Choat B, Tissue DT (2018). Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery. Plant, Cell & Environment, 41, 2869-2881. |
| [14] | Dai AG (2011). Drought under global warming: a review. Wiley Interdisciplinary Reviews: Climate Change, 2, 45-65. |
| [15] | Ding YL, Nie YP, Chen HS, Wang KL, Querejeta JI (2021). Water uptake depth is coordinated with leaf water potential, water-use efficiency and drought vulnerability in karst vegetation. New Phytologist, 229, 1339-1353. |
| [16] | Fu PL (2011). Contrasting Stem Hydraulic Traits, Water Relations and Photosynthesis Between Evergreen and Deciduous Trees in a Tropical Karst Forest. PhD dissertation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan. |
| [16] | [付培立 (2011). 热带喀斯特森林常绿和落叶树木水力结构、水分关系以及光合能力的对比研究. 博士学位论文, 中国科学院西双版纳热带植物园, 云南西双版纳.] |
| [17] | Fu PL, Liu WJ, Fan ZX, Cao KF (2016). Is fog an important water source for woody plants in an Asian tropical karst forest during the dry season? Ecohydrology, 9, 964-972. |
| [18] | Fu PL, Zhu SD, Zhang JL, Finnegan PM, Jiang YJ, Lin H, Fan ZX, Cao KF (2019). The contrasting leaf functional traits between a karst forest and a nearby non-karst forest in south-west China. Functional Plant Biology, 46, 907-915. |
| [19] | Geekiyanage N, Goodale UM, Cao KF, Kitajima K (2018). Leaf trait variations associated with habitat affinity of tropical karst tree species. Ecology and Evolution, 8, 286-295. |
| [20] | Geekiyanage N, Goodale UM, Cao KF, Kitajima K (2019). Plant ecology of tropical and subtropical karst ecosystems. Biotropica, 51, 626-640. |
| [21] | Givnish TJ (2002). Adaptive significance of evergreen vs. deciduous leaves: solving the triple paradox. Silva Fennica, 36, 703-743. |
| [22] | Gupta A, Rico-Medina A, Ca?o-Delgado AI (2020). The physiology of plant responses to drought. Science, 368, 266-269. |
| [23] | Hajek P, Link RM, Nock CA, Bauhus J, Gebauer T, Gessler A, Kovach K, Messier C, Paquette A, Saurer M, Scherer- Lorenzen M, Rose L, Schuldt B (2022). Mutually inclusive mechanisms of drought-induced tree mortality. Global Change Biology, 28, 3365-3378. |
| [24] | IPCC (2022). Climate Change 2022: Impacts, Adaptation and Vulnerability. Cambridge University Press, Cambridge, UK. |
| [25] | Ishida A, Harayama H, Yazaki K, Ladpala P, Sasrisang A, Kaewpakasit K, Panuthai S, Staporn D, Maeda T, Gamo M, Diloksumpun S, Puangchit L, Ishizuka M (2010). Seasonal variations of gas exchange and water relations in deciduous and evergreen trees in monsoonal dry forests of Thailand. Tree Physiology, 30, 935-945. |
| [26] | Jin Y, Wang CK, Zhou ZH (2019). Conifers but not angiosperms exhibit vulnerability segmentation between leaves and branches in a temperate forest. Tree Physiology, 39, 454-462. |
| [27] | Johnson DM, McCulloh KA, Woodruff DR, Meinzer FC (2012). Hydraulic safety margins and embolism reversal in stems and leaves: Why are conifers and angiosperms so different. Plant Science, 195, 48-53. |
| [28] | Johnson DM, Wortemann R, McCulloh KA, Jordan-Meille L, Ward E, Warren JM, Palmroth S, Domec JC (2016). A test of the hydraulic vulnerability segmentation hypothesis in angiosperm and conifer tree species. Tree Physiology, 36, 983-993. |
| [29] | Levionnois S, Ziegler C, Heuret P, Jansen S, Stahl C, Calvet E, Goret JY, Bonal D, Coste S (2021). Is vulnerability segmentation at the leaf-stem transition a drought resistance mechanism? A theoretical test with a trait-based model for Neotropical canopy tree species. Annals of Forest Science, 78, 87. DOI: 10.1007/s13595-021-01094-9. |
| [30] | Lian YQ, You GJY, Lin KR, Jiang ZC, Zhang C, Qin XQ (2015). Characteristics of climate change in southwest China karst region and their potential environmental impacts. Environmental Earth Sciences, 74, 937-944. |
| [31] | Losso A, B?r A, D?mon B, Dullin C, Ganthaler A, Petruzzellis F, Savi T, Tromba G, Nardini A, Mayr S, Beikircher B (2019). Insights from in vivo micro-CT analysis: testing the hydraulic vulnerability segmentation in Acer pseudoplatanus and Fagus sylvatica seedlings. New Phytologist, 221, 1831-1842. |
| [32] | Markesteijn L, Poorter L, Paz H, Sack L, Bongers F (2011). Ecological differentiation in xylem cavitation resistance is associated with stem and leaf structural traits. Plant, Cell & Environment, 34, 137-148. |
| [33] | McDowell N, Pockman WT, Allen CD, Breshears DD, Cobb N, Kolb T, Plaut J, Sperry J, West A, Williams DG, Yepez EA (2008). Mechanisms of plant survival and mortality during drought: Why do some plants survive while others succumb to drought. New Phytologist, 178, 719-739. |
| [34] | Ni MY, Aritsara ANA, Wang YQ, Huang DL, Xiang W, Wan CY, Zhu SD (2021). Analysis of xylem anatomy and function of representative tree species in a mixed evergreen and deciduous broad-leaved forest of mid- subtropical karst region. Chinese Journal of Plant Ecology, 45, 394-403. |
| [34] | [倪鸣源, Aritsara ANA, 王永强, 黄冬柳, 项伟, 万春燕, 朱师丹 (2021). 中亚热带喀斯特常绿落叶阔叶混交林典型树种的木质部解剖与功能特征分析. 植物生态学报, 45, 394-403.] |
| [35] | Pammenter NW, van der Willigen C(1998). A mathematical and statistical analysis of the curves illustrating vulnerability of xylem to cavitation. Tree Physiology, 18, 589-593. |
| [36] | Pivovaroff AL, Sack L, Santiago LS (2014). Coordination of stem and leaf hydraulic conductance in southern California shrubs: a test of the hydraulic segmentation hypothesis. New Phytologist, 203, 842-850. |
| [37] | Rowland L, da Costa ACL, Galbraith DR, Oliveira RS, Binks OJ, Oliveira AAR, Pullen AM, Doughty CE, Metcalfe DB, Vasconcelos SS, Ferreira LV, Malhi Y, Grace J, Mencuccini M, Meir P (2015). Death from drought in tropical forests is triggered by hydraulics not carbon starvation. Nature, 528, 119-122. |
| [38] | Sack L, Cowan PD, Jaikumar N, Holbrook NM (2003). The ‘hydrology’ of leaves: co-ordination of structure and function in temperate woody species. Plant, Cell & Environment, 26, 1343-1356. |
| [39] | Song TQ (2015). Plants and Environment in Karst Areas of Southwest China. Science Press, Beijing. |
| [39] | [宋同清 (2015). 西南喀斯特植物与环境. 科学出版社, 北京.] |
| [40] | Sperry JS, Donnelly JR, Tyree MT (1988). A method for measuring hydraulic conductivity and embolism in xylem. Plant, Cell & Environment, 11, 35-40. |
| [41] | Tan FS, Song HQ, Fu PL, Chen YJ, Siddiq Z, Cao KF, Zhu SD (2020). Hydraulic safety margins of co-occurring woody plants in a tropical karst forest experiencing frequent extreme droughts. Agricultural and Forest Meteorology, 292-293, 108107. DOI: 10.1016/j.agrformet.2020.108107. |
| [42] | Tyree MT, Cochard H, Cruiziat P, Sinclair B, Ameglio T (1993). Drought-induced leaf shedding in walnut: evidence for vulnerability segmentation. Plant, Cell & Environment, 16, 879-882. |
| [43] | Tyree MT, Ewers FW (1991). The hydraulic architecture of trees and other woody plants. New Phytologist, 119, 345-360. |
| [44] | Tyree MT, Hammel HT (1972). The measurement of the turgor pressure and the water relations of plants by the pressure-bomb technique. Journal of Experimental Botany, 23, 267-282. |
| [45] | Venturas MD, Sperry JS, Hacke UG (2017). Plant xylem hydraulics: What we understand, current research, and future challenges. Journal of Integrative Plant Biology, 59, 356-389. |
| [46] | Villagra M, Campanello PI, Bucci SJ, Goldstein G (2013). Functional relationships between leaf hydraulics and leaf economic traits in response to nutrient addition in subtropical tree species. Tree Physiology, 33, 1308-1318. |
| [47] | Wang P, Wu XQ, Hao YR, Wu CH, Zhang J (2020). Is Southwest China drying or wetting? Spatiotemporal patterns and potential causes. Theoretical and Applied Climatology, 139, 1-15. |
| [48] | Wheeler JK, Huggett BA, Tofte AN, Rockwell FE, Holbrook NM (2013). Cutting xylem under tension or supersaturated with gas can generate PLC and the appearance of rapid recovery from embolism. Plant, Cell & Environment, 36, 1938-1949. |
| [49] | Wigneron JP, Fan L, Ciais P, Bastos A, Brandt M, Chave J, Saatchi S, Baccini A, Fensholt R (2020). Tropical forests did not recover from the strong 2015-2016 El Ni?o event. Science Advances, 6, eaay4603. DOI: 10.1126/sciadv. aay4603. |
| [50] | Williams LJ, Bunyavejchewin S, Baker PJ (2008). Deciduousness in a seasonal tropical forest in western Thailand: interannual and intraspecific variation in timing, duration and environmental cues. Oecologia, 155, 571-582. |
| [51] | Yang Y, Zhao DS, Chen H (2019). Variability of bio- climatology indicators in the Southwest China under climate warming during 1961-2015. International Journal of Biometeorology, 63, 107-119. |
| [52] | Zhang MJ, He JY, Wang BL, Wang SJ, Li SS, Liu WL, Ma XN (2013). Extreme drought changes in Southwest China from 1960 to 2009. Journal of Geographical Sciences, 23, 3-16. |
| [53] | Zhang QW, Zhu SD, Jansen S, Cao KF (2021). Topography strongly affects drought stress and xylem embolism resistance in woody plants from a karst forest in Southwest China. Functional Ecology, 35, 566-577. |
| [54] | Zhang SB, Wen GJ, Yang DX (2019). Drought-induced mortality is related to hydraulic vulnerability segmentation of tree species in a savanna ecosystem. Forests, 10, 697. DOI: 10.3390/f10080697. |
| [55] | Zhao S, Pereira P, Wu XQ, Zhou JX, Cao JH, Zhang WX (2020). Global karst vegetation regime and its response to climate change and human activities. Ecological Indicators, 113, 106208. DOI: 10.1016/j.ecolind.2020.106208. |
| [56] | Zhu SD, Chen YJ, Fu PL, Cao KF (2017). Different hydraulic traits of woody plants from tropical forests with contrasting soil water availability. Tree Physiology, 37, 1469-1477. |
| [57] | Zhu SD, Chen YJ, Ye Q, He PC, Liu H, Li RH, Fu PL, Jiang GF, Cao KF (2018). Leaf turgor loss point is correlated with drought tolerance and leaf carbon economics traits. Tree Physiology, 38, 658-663. |
| [58] | Zhu SD, Liu H, Xu QY, Cao KF, Ye Q (2016). Are leaves more vulnerable to cavitation than branches. Functional Ecology, 30, 1740-1744. |
| [59] | Zimmermann MH (1983). Xylem Structure and the Ascent of Sap. Springer-Verlag, Berlin. |
Options