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Le Roncé I, Dardevet E, Venner S, Schönbeck L, Gessler A, Chuine I, Limousin JM. Reproduction alternation in trees: testing the resource depletion hypothesis using experimental fruit removal in Quercus ilex. TREE PHYSIOLOGY 2023; 43:952-964. [PMID: 36892403 DOI: 10.1093/treephys/tpad025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 02/26/2023] [Indexed: 06/11/2023]
Abstract
The keystones of resource budget models to explain mast seeding are that fruit production depletes tree stored resources, which become subsequently limiting to flower production the following year. These two hypotheses have, however, rarely been tested in forest trees. Using a fruit removal experiment, we tested whether preventing fruit development would increase nutrient and carbohydrates storage and modify allocation to reproduction and vegetative growth the following year. We removed all the fruits from nine adult Quercus ilex L. trees shortly after fruit set and compared, with nine control trees, the concentrations of nitrogen (N), phosphorus (P), zinc (Zn), potassium (K) and starch in leaves, twigs and trunk before, during and after the development of female flowers and fruits. The following year, we measured the production of vegetative and reproductive organs as well as their location on the new spring shoots. Fruit removal prevented the depletion of N and Zn in leaves during fruit growth. It also modified the seasonal dynamics in Zn, K and starch in twigs, but had no effect on reserves stored in the trunk. Fruit removal increased the production of female flowers and leaves the following year, and decreased the production of male flowers. Our results show that resource depletion operates differently for male and female flowering, because the timing of organ formation and the positioning of flowers in shoot architecture differ between male and female flowers. Our results suggest that N and Zn availability constrain flower production in Q. ilex, but also that other regulatory pathways might be involved. They strongly encourage further experiments manipulating fruit development over multiple years to describe the causal relationships between variations in resource storage and/or uptake, and male and female flower production in masting species.
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Affiliation(s)
- Iris Le Roncé
- CEFE, Univ. Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Elia Dardevet
- CEFE, Univ. Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Samuel Venner
- Laboratoire de Biométrie et Biologie Évolutive, UMR 5558, Université de Lyon, Université Lyon 1, CNRS, F-69622 Villeurbanne, France
| | - Leonie Schönbeck
- Forest Dynamics, Swiss Federal Research Institute WSL, CH-8903 Birmensdorf, Switzerland
- Department of Botany and Plant Sciences, University of California, Riverside, CA 9252, USA
| | - Arthur Gessler
- Forest Dynamics, Swiss Federal Research Institute WSL, CH-8903 Birmensdorf, Switzerland
- Institute of Terrestrial Ecosystems, ETH Zurich, Universitätstrasse 16, CH-8092 Zurich, Switzerland
| | - Isabelle Chuine
- CEFE, Univ. Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
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Labadie M, Guy K, Demené MN, Caraglio Y, Heidsieck G, Gaston A, Rothan C, Guédon Y, Pradal C, Denoyes B. Spatio-temporal analysis of strawberry architecture: insights into the control of branching and inflorescence complexity. JOURNAL OF EXPERIMENTAL BOTANY 2023:7143673. [PMID: 37133320 DOI: 10.1093/jxb/erad097] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 04/25/2023] [Indexed: 05/04/2023]
Abstract
Plant architecture plays a major role in flowering and therefore in crop yield. Attempts to visualize and analyse strawberry plant architecture have been few to date. Here, we developed open-source software combining two- and three-dimensional representations of plant development over time along with statistical methods to explore the variability in spatio-temporal development of plant architecture in cultivated strawberry. We applied this software to six seasonal strawberry varieties whose plants were exhaustively described monthly at the node scale. Results showed that the architectural pattern of the strawberry plant is characterized by a decrease of the module complexity between the zeroth-order module (primary crown) and higher-order modules (lateral branch crowns and extension crowns). Furthermore, for each variety, we could identify traits with a central role in determining yield, such as date of appearance and number of branches. By modeling the spatial organization of axillary meristem fate on the zeroth-order module using a hidden hybrid Markov/semi-Markov mathematical model, we further identified three zones with different probabilities of production of branch crowns, dormant buds, or stolons. This open-source software will be of value to the scientific community and breeders in studying the influence of environmental and genetic cues on strawberry architecture and yield.
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Affiliation(s)
- Marc Labadie
- Univ. Bordeaux, INRAE, Biologie du Fruit et Pathologie, UMR 1332, F-33140, France
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
| | - Karine Guy
- INVENIO, MIN de Brienne, 110 quai de Paludate, 33800 Bordeaux, France
| | | | - Yves Caraglio
- CIRAD, UMR AMAP and Université de Montpellier, 34398 Montpellier, France
| | - Gaetan Heidsieck
- Univ. Bordeaux, INRAE, Biologie du Fruit et Pathologie, UMR 1332, F-33140, France
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
| | - Amelia Gaston
- Univ. Bordeaux, INRAE, Biologie du Fruit et Pathologie, UMR 1332, F-33140, France
| | - Christophe Rothan
- Univ. Bordeaux, INRAE, Biologie du Fruit et Pathologie, UMR 1332, F-33140, France
| | - Yann Guédon
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
| | - Christophe Pradal
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
- Inria and LIRMM, Univ Montpellier, CNRS, Montpellier, France
| | - Béatrice Denoyes
- Univ. Bordeaux, INRAE, Biologie du Fruit et Pathologie, UMR 1332, F-33140, France
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Moulia B, Badel E, Bastien R, Duchemin L, Eloy C. The shaping of plant axes and crowns through tropisms and elasticity: an example of morphogenetic plasticity beyond the shoot apical meristem. THE NEW PHYTOLOGIST 2022; 233:2354-2379. [PMID: 34890051 DOI: 10.1111/nph.17913] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Shoot morphogenetic plasticity is crucial to the adaptation of plants to their fluctuating environments. Major insights into shoot morphogenesis have been compiled studying meristems, especially the shoot apical meristem (SAM), through a methodological effort in multiscale systems biology and biophysics. However, morphogenesis at the SAM is robust to environmental changes. Plasticity emerges later on during post-SAM development. The purpose of this review is to show that multiscale systems biology and biophysics is insightful for the shaping of the whole plant as well. More specifically, we review the shaping of axes and crowns through tropisms and elasticity, combining the recent advances in morphogenetic control using physical cues and by genes. We focus mostly on land angiosperms, but with growth habits ranging from small herbs to big trees. We show that generic (universal) morphogenetic processes have been identified, revealing feedforward and feedback effects of global shape on the local morphogenetic process. In parallel, major advances have been made in the analysis of the major genes involved in shaping axes and crowns, revealing conserved genic networks among angiosperms. Then, we show that these two approaches are now starting to converge, revealing exciting perspectives.
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Affiliation(s)
- Bruno Moulia
- Université Clermont Auvergne, INRAE, PIAF, F-63000, Clermont-Ferrand, France
| | - Eric Badel
- Université Clermont Auvergne, INRAE, PIAF, F-63000, Clermont-Ferrand, France
| | - Renaud Bastien
- Université Clermont Auvergne, INRAE, PIAF, F-63000, Clermont-Ferrand, France
- INSERM U1284, Center for Research and Interdisciplinarity (CRI), Université de Paris, F-75004, Paris, France
| | - Laurent Duchemin
- Physique et Mécanique des Milieux Hétérogenes, CNRS, ESPCI Paris, Université PSL, Sorbonne Université, Université de Paris, F-75005, Paris, France
| | - Christophe Eloy
- Aix Marseille Univ, CNRS, Centrale Marseille, IRPHE, F-13013, Marseille, France
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Guédon Y, Caraglio Y, Granier C, Lauri PÉ, Muller B. Identifying Developmental Patterns in Structured Plant Phenotyping Data. Methods Mol Biol 2022; 2395:199-225. [PMID: 34822155 DOI: 10.1007/978-1-0716-1816-5_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Technological breakthroughs concerning both sensors and robotized plant phenotyping platforms have totally renewed the plant phenotyping paradigm in the last two decades. This has impacted both the nature and the throughput of data with the availability of data at high-throughput from the tissular to the whole plant scale. Sensor outputs often take the form of 2D or 3D images or time series of such images from which traits are extracted while organ shapes, shoot or root system architectures can be deduced. Despite this change of paradigm, many phenotyping studies often ignore the structure of the plant and therefore loose the information conveyed by the temporal and spatial patterns emerging from this structure. The developmental patterns of plants often take the form of succession of well-differentiated phases, stages or zones depending on the temporal, spatial or topological indexing of data. This entails the use of hierarchical statistical models for their identification.The objective here is to show potential approaches for analyzing structured plant phenotyping data using state-of-the-art methods combining probabilistic modeling, statistical inference and pattern recognition. This approach is illustrated using five different examples at various scales that combine temporal and topological index parameters, and development and growth variables obtained using prospective or retrospective measurements.
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Affiliation(s)
- Yann Guédon
- AGAP, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Yves Caraglio
- AMAP, Univ Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, France.
| | - Christine Granier
- AGAP, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Pierre-Éric Lauri
- ABSys, Univ Montpellier, CIHEAM-IAMM, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Bertrand Muller
- LEPSE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France
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Lee J, Kim H, Park SG, Hwang H, Yoo SI, Bae W, Kim E, Kim J, Lee HY, Heo TY, Kang KK, Lee Y, Hong CP, Cho H, Ryu H. Brassinosteroid-BZR1/2-WAT1 module determines the high level of auxin signalling in vascular cambium during wood formation. THE NEW PHYTOLOGIST 2021; 230:1503-1516. [PMID: 33570747 DOI: 10.1111/nph.17265] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
The tight regulation of local auxin homeostasis and signalling maxima in xylem precursor cells specifies the organising activity of the vascular cambium and consequently promotes xylem differentiation and wood formation. However, the molecular mechanisms underlying the local auxin signalling maxima in the vascular cambium are largely unknown. Here, we reveal that brassinosteroid (BR)-activated WALLS ARE THIN1 (WAT1) facilitates wood formation by enhancing local auxin signalling in the vascular cambium in Solanum lycopersicum. Growth defects and low auxin signalling readouts in the BR-deficient tomato cultivar, Micro-Tom, were associated with a novel recessive allele, Slwat1-copi, created by the insertion of a retrotransposon in the last exon of the SlWAT1 locus. Molecular and genetic studies by generating the gain-of-function and loss-of-function tomato mutants revealed that SlWAT1 is a critical regulator for fine tuning local auxin homeostasis and signalling outputs in vascular cambium to facilitate secondary growth. Finally, we discovered that BR-regulated SlBZR1/2 directly activated downstream auxin responses by SlWAT1 upregulation in xylem precursor cells to facilitate xylem differentiation and subsequent wood formation. Our data suggest that the BR-SlBZR1/2-WAT1 signalling network contributes to the high level of auxin signalling in the vascular cambium for secondary growth.
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Affiliation(s)
- Jinsu Lee
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
- School of Biological Sciences, Seoul National University, Seoul, 08826, Korea
| | - Hyemin Kim
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
| | | | - Hyeona Hwang
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
| | | | - Wonsil Bae
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
| | - Eunhui Kim
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
| | - Jaehoon Kim
- Department of Information and Statistics, Chungbuk National University, Cheongju, 28644, Korea
| | - Hwa-Yong Lee
- Department of Forest Science, Chungbuk National University, Cheongju, 28644, Korea
| | - Tae-Young Heo
- Department of Information and Statistics, Chungbuk National University, Cheongju, 28644, Korea
| | - Kwon Kyoo Kang
- Department of Horticulture, Hankyong National University, Ansung, 17579, Korea
| | - Yuree Lee
- School of Biological Sciences, Seoul National University, Seoul, 08826, Korea
| | | | - Hyunwoo Cho
- Department of Industrial Plant Science and Technology, Chungbuk National University, Cheongju, 28644, Korea
| | - Hojin Ryu
- Department of Biology, Chungbuk National University, Cheongju, 28644, Korea
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Louarn G, Song Y. Two decades of functional-structural plant modelling: now addressing fundamental questions in systems biology and predictive ecology. ANNALS OF BOTANY 2020; 126:501-509. [PMID: 32725187 PMCID: PMC7489058 DOI: 10.1093/aob/mcaa143] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 07/25/2020] [Indexed: 05/16/2023]
Abstract
BACKGROUND Functional-structural plant models (FSPMs) explore and integrate relationships between a plant's structure and processes that underlie its growth and development. In the last 20 years, scientists interested in functional-structural plant modelling have expanded greatly the range of topics covered and now handle dynamical models of growth and development occurring from the microscopic scale, and involving cell division in plant meristems, to the macroscopic scales of whole plants and plant communities. SCOPE The FSPM approach occupies a central position in plant science; it is at the crossroads of fundamental questions in systems biology and predictive ecology. This special issue of Annals of Botany features selected papers on critical areas covered by FSPMs and examples of comprehensive models that are used to solve theoretical and applied questions, ranging from developmental biology to plant phenotyping and management of plants for agronomic purposes. Altogether, they offer an opportunity to assess the progress, gaps and bottlenecks along the research path originally foreseen for FSPMs two decades ago. This review also allows discussion of current challenges of FSPMs regarding (1) integration of multidisciplinary knowledge, (2) methods for handling complex models, (3) standards to achieve interoperability and greater genericity and (4) understanding of plant functioning across scales. CONCLUSIONS This approach has demonstrated considerable progress, but has yet to reach its full potential in terms of integration and heuristic knowledge production. The research agenda of functional-structural plant modellers in the coming years should place a greater emphasis on explaining robust emergent patterns, and on the causes of possible deviation from it. Modelling such patterns could indeed fuel both generic integration across scales and transdisciplinary transfer. In particular, it could be beneficial to emergent fields of research such as model-assisted phenotyping and predictive ecology in managed ecosystems.
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Affiliation(s)
| | - Youhong Song
- Anhui Agricultural University, School of Agronomy, Hefei, Anhui Province, PR China
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Antonova IS, Bart VA. Features of a Biennial Shoot System as a Unit for Modeling Crown Development in Ulmus glabra Huds. CONTEMP PROBL ECOL+ 2020. [DOI: 10.1134/s1995425520030026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Buissart F, Vennetier M, Delagrange S, Girard F, Caraglio Y, Sabatier SA, Munson AD, Nicolini EA. The relative weight of ontogeny, topology and climate in the architectural development of three North American conifers. AOB PLANTS 2018; 10:ply045. [PMID: 30151094 PMCID: PMC6101484 DOI: 10.1093/aobpla/ply045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Knowledge of plant architecture allows retrospective study of plant development, hence provides powerful tools, through modelling and simulation, to link this development with environmental constraints, and then predict its response to global change. The present study aims to determine some of the main endogenous and exogenous variables driving the architectural development of three North American conifers. We measured architectural traits retrospectively on the trunk, branches and twigs of whole tree crowns for each species: annual shoot length (ASL), needle length, branching patterns and reproduction organs (male and female). We fitted a partial least square (PLS) regression to explain each architectural trait with respect to topological, ontogenic and climatic variables. Results showed a significant weight of these three groups of variables for previous and current year, corresponding, respectively, to organogenesis and elongation. Topological and ontogenic variables had the greatest weight in models. Particularly, all architectural traits were strongly correlated with ASL. We highlighted a negative architectural response of two species to higher than average temperatures, whereas the third one took advantage of these higher temperatures to some degree. Tree architectural development weekly but significantly improved with higher precipitation. Our study underlines the strong weight of topology and ontogeny in tree growth patterns at twig and branch scales. The correlation between ASL and other tree architectural traits should be integrated into architectural development models. Climate variables are secondary in importance at the twig scale. However, interannual climate variations influence all axis categories and branching orders and therefore significantly impact crown development as a whole. This latter impact may increase with climate change, especially as climate affects architectural traits over at least 2 years, through organogenesis and elongation.
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Affiliation(s)
- Fabien Buissart
- Irstea UR RECOVER/Ecosystèmes Méditerranéens et Risques, Centre d’Aix-en-Provence, Aix-En-Provence Cedex, France
- Aix-Marseille Université, Jardin du Pharo-58, bd Charles Livon, Marseille Cedex, France
| | - Michel Vennetier
- Irstea UR RECOVER/Ecosystèmes Méditerranéens et Risques, Centre d’Aix-en-Provence, Aix-En-Provence Cedex, France
- ECCOREV FR 3098, Technopôle de l’environnement Arbois-Méditerranée, Domaine du Petit Arbois, Avenue Louis Philibert, Bâtiment du CEREGE BP, Aix-en-Provence cedex, France
| | - Sylvain Delagrange
- Institute of Temperate Forest Sciences (ISFORT), University of Quebec in Outaouais (UQO), Rue Principale, Ripon, Québec, Canada
| | - François Girard
- Université de Montréal (UM), 520 chemin de la Côte-Ste-Catherine, Montréal, Québec, Canada
| | | | | | - Alison D Munson
- Université Laval, Centre d’étude de la forêt, Faculté de foresterie, de géographie et de géomatique, rue de la Terrasse, Québec, Québec, Canada
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