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Staudt M, Byron J, Piquemal K, Williams J. Compartment specific chiral pinene emissions identified in a Maritime pine forest. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 654:1158-1166. [PMID: 30841390 DOI: 10.1016/j.scitotenv.2018.11.146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/09/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
To track unknown sources and sinks of volatile organic compounds (VOCs) inside forest canopies we measured diel cycles of VOC exchanges in a temperate maritime forest at the branch, stem and ground level with special focus on the chiral signatures of pinenes. All compartments released day and night α- and β-pinene as major compounds. In addition, strong light dependent emissions of ocimene and linalool from branches occurred during hot summer days. In all compartments the overall emission strength of pinenes varied from day to day spanning 1 to 2 orders of magnitude. The highest pinene emissions from ground and stem were observed during high moisture conditions. Despite this variability stem emissions consistently expressed a different chiral composition than branch emissions, the former containing a much larger fraction of (-)-enantiomers than the latter. Pinene emissions from dead needle litter and soil were mostly enriched in (-)-enantiomers, while the chiral signatures of the ambient air inside the forest showed mostly intermediate levels compared to the emission signatures. These findings suggest that different organ-specific pinene producing enzymes exist in Maritime pine, and indicate that emissions from ground and stem compartments essentially contribute to the canopy VOC flux. Overall the results open new perspectives to explore chirality as a possible marker to recognize shifts in the contributions of different VOC sources present within forest ecosystems and to explain observed temporal changes in the chiral signature of pinenes in the atmosphere.
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Affiliation(s)
- Michael Staudt
- Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE Campus CNRS, 1919 Route de Mende, F-34293 Montpellier cedex 5, France.
| | - Joseph Byron
- Max-Planck-Institut für Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
| | - Karim Piquemal
- Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE Campus CNRS, 1919 Route de Mende, F-34293 Montpellier cedex 5, France
| | - Jonathan Williams
- Max-Planck-Institut für Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
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Li C, Wang P, van der Ent A, Cheng M, Jiang H, Lund Read T, Lombi E, Tang C, de Jonge MD, Menzies NW, Kopittke PM. Absorption of foliar-applied Zn in sunflower (Helianthus annuus): importance of the cuticle, stomata and trichomes. ANNALS OF BOTANY 2019; 123:57-68. [PMID: 30020418 PMCID: PMC6344099 DOI: 10.1093/aob/mcy135] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/16/2018] [Indexed: 05/06/2023]
Abstract
Background and Aims The pathways whereby foliar-applied nutrients move across the leaf surface remain unclear. The aim of the present study was to examine the pathways by which foliar-applied Zn moves across the sunflower (Helianthus annuus) leaf surface, considering the potential importance of the cuticle, stomata and trichomes. Methods Using synchrotron-based X-ray florescence microscopy and nanoscale secondary ion mass spectrometry (NanoSIMS), the absorption of foliar-applied ZnSO4 and nano-ZnO were studied in sunflower. The speciation of Zn was also examined using synchrotron-based X-ray absorption spectroscopy. Key Results Non-glandular trichomes (NGTs) were particularly important for foliar Zn absorption, with Zn preferentially accumulating within trichomes in ≤15 min. The cuticle was also found to have a role, with Zn appearing to move across the cuticle before accumulating in the walls of the epidermal cells. After 6 h, the total Zn that accumulated in the NGTs was approx. 1.9 times higher than in the cuticular tissues. No marked accumulation of Zn was found within the stomatal cavity, probably indicating a limited contribution of the stomatal pathway. Once absorbed, the Zn accumulated in the walls of the epidermal and the vascular cells, and trichome bases of both leaf sides, with the bundle sheath extensions that connected to the trichomes seemingly facilitating this translocation. Finally, the absorption of nano-ZnO was substantially lower than for ZnSO4, with Zn probably moving across the leaf surface as soluble Zn rather than nanoparticles. Conclusions In sunflower, both the trichomes and cuticle appear to be important for foliar Zn absorption.
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Affiliation(s)
- Cui Li
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland, Australia
| | - Peng Wang
- Nanjing Agricultural University, College of Resources and Environmental Sciences, Nanjing, China
- The University of Queensland, Centre for Soil and Environmental Research, School of Agriculture and Food Sciences, St Lucia, Queensland, Australia
| | - Antony van der Ent
- Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, Australia
- Laboratoire Sols et Environnement, Université de Lorraine, France
| | - Miaomiao Cheng
- La Trobe University, Centre for AgriBioscience, Bundoora, Victoria, Australia
| | - Haibo Jiang
- University of Western Australia, Centre for Microscopy, Characterization and Analysis, Crawley, WA, Australia
| | - Thea Lund Read
- University of South Australia, Future Industries Institute, Mawson Lakes, South Australia, Australia
| | - Enzo Lombi
- University of South Australia, Future Industries Institute, Mawson Lakes, South Australia, Australia
| | - Caixian Tang
- La Trobe University, Centre for AgriBioscience, Bundoora, Victoria, Australia
| | | | - Neal W Menzies
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland, Australia
| | - Peter M Kopittke
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland, Australia
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Chateigner-Boutin AL, Lapierre C, Alvarado C, Yoshinaga A, Barron C, Bouchet B, Bakan B, Saulnier L, Devaux MF, Girousse C, Guillon F. Ferulate and lignin cross-links increase in cell walls of wheat grain outer layers during late development. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 276:199-207. [PMID: 30348319 DOI: 10.1016/j.plantsci.2018.08.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/30/2018] [Accepted: 08/31/2018] [Indexed: 06/08/2023]
Abstract
Important biological, nutritional and technological roles are attributed to cell wall polymers from cereal grains. The composition of cell walls in dry wheat grain has been well studied, however less is known about cell wall deposition and modification in the grain outer layers during grain development. In this study, the composition of cell walls in the outer layers of the wheat grain (Triticum aestivum Recital cultivar) was investigated during grain development, with a focus on cell wall phenolics. We discovered that lignification of outer layers begins earlier than previously reported and long before the grain reaches its final size. Cell wall feruloylation increased in development. However, in the late stages, the amount of ferulate releasable by mild alkaline hydrolysis was reduced as well as the yield of lignin-derived thioacidolysis monomers. These reductions indicate that new ferulate-mediated cross-linkages of cell wall polymers appeared as well as new resistant interunit bonds in lignins. The formation of these additional linkages more specifically occurred in the outer pericarp. Our results raised the possibility that stiffening of cell walls occur at late development stages in the outer pericarp and might contribute to the restriction of the grain radial growth.
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Affiliation(s)
| | - Catherine Lapierre
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France.
| | - Camille Alvarado
- UR1268 BIA (Biopolymères Interactions Assemblages), INRA, 44300, Nantes, France.
| | - Arata Yoshinaga
- Laboratory of Tree Cell Biology, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Cécile Barron
- UMR1208 IATE, INRA, CIRAD, Montpellier SupAgro, Univ Montpellier, Montpellier, France.
| | - Brigitte Bouchet
- UR1268 BIA (Biopolymères Interactions Assemblages), INRA, 44300, Nantes, France.
| | - Bénédicte Bakan
- UR1268 BIA (Biopolymères Interactions Assemblages), INRA, 44300, Nantes, France.
| | - Luc Saulnier
- UR1268 BIA (Biopolymères Interactions Assemblages), INRA, 44300, Nantes, France.
| | | | - Christine Girousse
- INRA UMR1095 GDEC (Génétique Diversité Ecophysiologie des Céréales), INRA, 63000, Clermont-Ferrand, France; UBP, UMR 1095 GDEC (Génétique Diversité Ecophysiologie des Céréales), INRA, 63000, Clermont-Ferrand, France.
| | - Fabienne Guillon
- UR1268 BIA (Biopolymères Interactions Assemblages), INRA, 44300, Nantes, France.
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Domínguez E, Heredia-Guerrero JA, Heredia A. The plant cuticle: old challenges, new perspectives. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:5251-5255. [PMID: 29136457 PMCID: PMC5853762 DOI: 10.1093/jxb/erx389] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Affiliation(s)
- Eva Domínguez
- Instituto de Hortofruticultura Subtropical y Mediterránea (IHSM) La Mayora. Universidad de Málaga-CSIC, Algarrobo-Costa, Málaga, Spain
| | | | - Antonio Heredia
- IHSM-CSIC-UMA, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, Málaga, Spain
- Correspondence:
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