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Hong Y, Liu X, Camarero JJ, Xu G, Zhang L, Zeng X, Aritsara ANA, Zhang Y, Wang W, Xing X, Lu Q. The effects of intrinsic water-use efficiency and climate on wood anatomy. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2023:10.1007/s00484-023-02475-7. [PMID: 37072578 DOI: 10.1007/s00484-023-02475-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 05/03/2023]
Abstract
Climate warming may induce growth decline in warm-temperate areas subjected to seasonal soil moisture deficit, whereas increasing atmospheric CO2 concentration (Ca) is expected to enhance tree growth. An accurate understanding of tree growth and physiological processes responding to climate warming and increasing Ca is critical. Here, we analyzed tree-ring stable carbon isotope and wood anatomical traits of Pinus tabuliformis from Qinling Mountains in China to understand how lumen diameter (LD) determining potential hydraulic conductivity and cell-wall thickness (CWT) determining carbon storage responded to climate and Ca. The effects of climate and Ca on intrinsic water-use efficiency (iWUE) were isolated, and iWUE values due to only-climate (iWUEClim) and only-CO2 effects (iWUECO2) were obtained. During a low-iWUE period, the influences of climate on earlywood (EW) LD and latewood (LW) CWT prevailed. During a high-iWUE period, CO2 fertilization promoted cell enlargement and carbon storage but this was counteracted by a negative influence of climate warming. The limiting direct effects of iWUEClim and indirect effects of climate on EW LD were greater than on LW CWT. P. tabuliformis in temperate forests will face a decline of growth and carbon fixation, but will produce embolism-resistant tracheids with narrow lumen responding to future hotter droughts.
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Affiliation(s)
- Yixue Hong
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
- State Key Laboratory of Biocontrol, School of Ecology, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China
| | - Xiaohong Liu
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China.
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China.
| | - J Julio Camarero
- Instituto Pirenaico de Ecología (IPE-CSIC), Zaragoza, 50092, Spain
| | - Guobao Xu
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Lingnan Zhang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | - Xiaomin Zeng
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | - Amy Ny Aina Aritsara
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004, China
| | - Yu Zhang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | - Wenzhi Wang
- The Key Laboratory of Mountain Environment Evolution and Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Xiaoyu Xing
- Qinling National Botanical Garden, Xi'an, 710061, China
| | - Qiangqiang Lu
- School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
- Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China
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Kübert A, Dubbert M, Bamberger I, Kühnhammer K, Beyer M, van Haren J, Bailey K, Hu J, Meredith LK, Nemiah Ladd S, Werner C. Tracing plant source water dynamics during drought by continuous transpiration measurements: An in-situ stable isotope approach. PLANT, CELL & ENVIRONMENT 2023; 46:133-149. [PMID: 36305510 DOI: 10.1111/pce.14475] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/21/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
The isotopic composition of xylem water (δX ) is of considerable interest for plant source water studies. In-situ monitored isotopic composition of transpired water (δT ) could provide a nondestructive proxy for δX -values. Using flow-through leaf chambers, we monitored 2-hourly δT -dynamics in two tropical plant species, one canopy-forming tree and one understory herbaceous species. In an enclosed rainforest (Biosphere 2), we observed δT -dynamics in response to an experimental severe drought, followed by a 2 H deep-water pulse applied belowground before starting regular rain. We also sampled branches to obtain δX -values from cryogenic vacuum extraction (CVE). Daily flux-weighted δ18 OT -values were a good proxy for δ18 OX -values under well-watered and drought conditions that matched the rainforest's water source. Transpiration-derived δ18 OX -values were mostly lower than CVE-derived values. Transpiration-derived δ2 HX -values were relatively high compared to source water and consistently higher than CVE-derived values during drought. Tracing the 2 H deep-water pulse in real-time showed distinct water uptake and transport responses: a fast and strong contribution of deep water to canopy tree transpiration contrasting with a slow and limited contribution to understory species transpiration. Thus, the in-situ transpiration method is a promising tool to capture rapid dynamics in plant water uptake and use by both woody and nonwoody species.
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Affiliation(s)
- Angelika Kübert
- Ecosystem Physiology, University of Freiburg, Freiburg, Germany
- Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki, Finland
| | - Maren Dubbert
- Isotope Biogeochemistry and Gas Fluxes, Landscape Functioning, ZALF, Müncheberg, Germany
| | - Ines Bamberger
- Atmospheric Chemistry Group, University of Bayreuth, Bayreuth, Germany
| | - Kathrin Kühnhammer
- Ecosystem Physiology, University of Freiburg, Freiburg, Germany
- Institute for Geoecology, Technical University of Braunschweig, Braunschweig, Germany
| | - Matthias Beyer
- Institute for Geoecology, Technical University of Braunschweig, Braunschweig, Germany
| | - Joost van Haren
- Biosphere 2, University of Arizona, Tucson, Arizona, USA
- Honors College, University of Arizona, Tucson, Arizona, USA
| | - Kinzie Bailey
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, USA
| | - Jia Hu
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, USA
| | - Laura K Meredith
- Biosphere 2, University of Arizona, Tucson, Arizona, USA
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, USA
| | - S Nemiah Ladd
- Ecosystem Physiology, University of Freiburg, Freiburg, Germany
- Biogeochemistry Group, Department of Environmental Sciences, University of Basel, Basel, Switzerland
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Degraeve S, De Baerdemaeker NJF, Ameye M, Leroux O, Haesaert GJW, Steppe K. Acoustic Vulnerability, Hydraulic Capacitance, and Xylem Anatomy Determine Drought Response of Small Grain Cereals. FRONTIERS IN PLANT SCIENCE 2021; 12:599824. [PMID: 34113357 PMCID: PMC8186553 DOI: 10.3389/fpls.2021.599824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 04/12/2021] [Indexed: 06/01/2023]
Abstract
Selection of high-yielding traits in cereal plants led to a continuous increase in productivity. However, less effort was made to select on adaptive traits, favorable in adverse and harsh environments. Under current climate change conditions and the knowledge that cereals are staple foods for people worldwide, it is highly important to shift focus to the selection of traits related to drought tolerance, and to evaluate new tools for efficient selection. Here, we explore the possibility to use vulnerability to drought-induced xylem embolism of wheat cultivars Excalibur and Hartog (Triticum aestivum L.), rye cultivar Duiker Max (Secale cereale L.), and triticale cultivars Dublet and US2014 (x Triticosecale Wittmack) as a proxy for their drought tolerance. Multiple techniques were combined to underpin this hypothesis. During bench-top dehydration experiments, acoustic emissions (AEs) produced by formation of air emboli were detected, and hydraulic capacitances quantified. By only looking at the AE50 values, one would classify wheat cultivar Excalibur as most tolerant and triticale cultivar Dublet as most vulnerable to drought-induced xylem embolism, though Dublet had significantly higher hydraulic capacitances, which are essential in terms of internal water storage to temporarily buffer or delay water shortage. In addition, xylem anatomical traits revealed that both cultivars have a contrasting trade-off between hydraulic safety and efficiency. This paper emphasizes the importance of including a cultivar's hydraulic capacitance when evaluating its drought response and vulnerability to drought-induced xylem embolism, instead of relying on the AE50 as the one parameter.
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Affiliation(s)
- Szanne Degraeve
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Niels J. F. De Baerdemaeker
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Maarten Ameye
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Olivier Leroux
- Department of Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | | | - Kathy Steppe
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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Caicedo-Lopez LH, Contreras-Medina LM, Guevara-Gonzalez RG, Perez-Matzumoto AE, Ruiz-Rueda A. Effects of hydric stress on vibrational frequency patterns of Capsicum annuum plants. PLANT SIGNALING & BEHAVIOR 2020; 15:1770489. [PMID: 32490712 PMCID: PMC8570743 DOI: 10.1080/15592324.2020.1770489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/06/2020] [Accepted: 05/08/2020] [Indexed: 05/20/2023]
Abstract
Plants that experience a lack of sufficient irrigation undergo hydric stress, which causes the modification of their mechanical properties. These changes include a complex network of chemical and physical signals that interact between plant-plant and plant-environment systems in a mechanism that is still not well understood, and that differs among species. This mechanical response implies different levels of vibration when the plant experiences structural modifications from self-hydraulic adjustments of flux exchange at specific frequencies, with these carrying behavioral information. To measure these signals, highly sensitive instrumentation that allows the decoding of displacement velocity and displacement of plants, which is possible through calibrated equipment such as 3D scanning laser vibrometers, is necessary. Laser vibrometry technology allows for noninvasive measurements in real-time. Physiological changes could reasonably affect the biomechanical condition of plants in terms of the frequency (hertz) and intensity of the plant's vibration. In this research, it is proposed that the frequency changes of a plant's vibration are related to the plant's hydric condition and that these frequency vibrations have the ecological potential to communicate water changes and levels of hydric stress. The peak of the velocity of plant displacements was found to vary from 0.079 to 1.74 mm/s, and natural frequencies (hertz) range is between 1.8 and 2.6 Hz for plants with low hydric stress (LHS), between 1.3 and 1.6 Hz for plants with medium hydric stress (MHS), and between 6.7 and 7.8 Hz for plants with high hydric stress. These values could act as preliminary references for water management using noninvasive techniques and, knowledge of the range of natural frequencies of hydric stress risk in chili pepper crops can be applied in precision agriculture practices.
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Affiliation(s)
- Laura Helena Caicedo-Lopez
- Group of Basic and Applied Bioengineering, Faculty of Engineering, Autonomous University of Queretaro, El Marques, Mexico
| | - Luis Miguel Contreras-Medina
- Group of Basic and Applied Bioengineering, Faculty of Engineering, Autonomous University of Queretaro, El Marques, Mexico
- CONTACT Luis Miguel Contreras-Medina Group of Basic and Applied Bioengineering, Faculty of Engineering, Autonomous University of Queretaro, Campus Amazcala, Campus Amazcala. Carr. Chichimequillas-Amazcala Km 1 S/N, El Marques76265, Mexico
| | - Ramon Gerardo Guevara-Gonzalez
- Group of Basic and Applied Bioengineering, Faculty of Engineering, Autonomous University of Queretaro, El Marques, Mexico
| | | | - Arturo Ruiz-Rueda
- Physical Metrology, National Metrology Center (CENAM) Km 4.5 Carretera a Los Cues C.P, El Marques, México
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Salomón RL, Limousin JM, Ourcival JM, Rodríguez-Calcerrada J, Steppe K. Stem hydraulic capacitance decreases with drought stress: implications for modelling tree hydraulics in the Mediterranean oak Quercus ilex. PLANT, CELL & ENVIRONMENT 2017; 40:1379-1391. [PMID: 28152583 DOI: 10.1111/pce.12928] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/20/2017] [Accepted: 01/27/2017] [Indexed: 05/25/2023]
Abstract
Hydraulic modelling is a primary tool to predict plant performance in future drier scenarios. However, as most tree models are validated under non-stress conditions, they may fail when water becomes limiting. To simulate tree hydraulic functioning under moist and dry conditions, the current version of a water flow and storage mechanistic model was further developed by implementing equations that describe variation in xylem hydraulic resistance (RX ) and stem hydraulic capacitance (CS ) with predawn water potential (ΨPD ). The model was applied in a Mediterranean forest experiencing intense summer drought, where six Quercus ilex trees were instrumented to monitor stem diameter variations and sap flow, concurrently with measurements of predawn and midday leaf water potential. Best model performance was observed when CS was allowed to decrease with decreasing ΨPD . Hydraulic capacitance decreased from 62 to 25 kg m-3 MPa-1 across the growing season. In parallel, tree transpiration decreased to a greater extent than the capacitive water release and the contribution of stored water to transpiration increased from 2.0 to 5.1%. Our results demonstrate the importance of stored water and seasonality in CS for tree hydraulic functioning, and they suggest that CS should be considered to predict the drought response of trees with models.
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Affiliation(s)
- Roberto L Salomón
- Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
- Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links, 653-9000, Ghent, Belgium
| | - Jean-Marc Limousin
- Centre d'Ecologie Fonctionnelle et Evolutive CEFE, CNRS, UMR 5175, 1919 route de Mende, F-34293, Montpellier, Cedex 5, France
| | - Jean-Marc Ourcival
- Centre d'Ecologie Fonctionnelle et Evolutive CEFE, CNRS, UMR 5175, 1919 route de Mende, F-34293, Montpellier, Cedex 5, France
| | - Jesús Rodríguez-Calcerrada
- Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Kathy Steppe
- Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links, 653-9000, Ghent, Belgium
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6
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Epila J, Verbeeck H, Otim-Epila T, Okullo P, Kearsley E, Steppe K. The ecology ofMaesopsis eminiiEngl. in tropical Africa. Afr J Ecol 2017. [DOI: 10.1111/aje.12408] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jackie Epila
- Faculty of Bioscience Engineering; Department of Applied Ecology and Environmental Biology; Laboratory of Plant Ecology; Ghent University; Coupure links 653 Ghent B-9000 Belgium
- Faculty of Bioscience Engineering; Department of Applied Ecology and Environmental Biology; CAVElab Computational & Applied Vegetation Ecology; Ghent University; Coupure links 653 Ghent B-9000 Belgium
| | - Hans Verbeeck
- Faculty of Bioscience Engineering; Department of Applied Ecology and Environmental Biology; CAVElab Computational & Applied Vegetation Ecology; Ghent University; Coupure links 653 Ghent B-9000 Belgium
| | - Thomas Otim-Epila
- Civil Aviation Authority (CAA); Head Office P.O.Box 5536 Entebbe Uganda
| | - Paul Okullo
- National Agricultural Research Organization (NARO); Karamoja Uganda
| | - Elizabeth Kearsley
- Faculty of Bioscience Engineering; Department of Applied Ecology and Environmental Biology; CAVElab Computational & Applied Vegetation Ecology; Ghent University; Coupure links 653 Ghent B-9000 Belgium
| | - Kathy Steppe
- Faculty of Bioscience Engineering; Department of Applied Ecology and Environmental Biology; Laboratory of Plant Ecology; Ghent University; Coupure links 653 Ghent B-9000 Belgium
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