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Sakurai Y, Ishizaki S. Plant-plant communication in Camellia japonica and C. rusticana via volatiles. Sci Rep 2024; 14:6284. [PMID: 38491033 PMCID: PMC10943193 DOI: 10.1038/s41598-024-56268-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
Plants emit volatile compounds when they are subjected to herbivorous, pathogenic, or artificial damages. Both the damaged plant and the neighboring intact plants induce resistance when they receive these volatiles, a phenomenon known as plant-plant communication. However, field observations of this phenomenon are limited. To understand the nature of plant-plant communication, we collected information about intra- and inter-plant signaling via volatiles in Camellia japonica and C. rusticana under natural conditions. We exposed intact branches of damaged plant (intra-plant) or neighboring plant (inter-plant) to artificially damaged plant volatiles (ADPVs). Leaf damage reduced in ADPVs-exposed branches in the neighboring plants compared to branches that were exposed to volatiles from intact leaves, thus, indicating that inter-plant signaling occur by the emission of volatiles from damaged leaves. We also conducted an air-transfer experiment wherein the headspace air of the damaged branch was transferred to the headspace of intact branches. Leaf damage reduced on the ADPVs-transferred branch compared to the control branch. The effect of volatiles on damage reduction lasted for three months. Our results indicate that ADPVs in Camellia species contain cues that induce resistance in neighboring plants. Our findings improve understanding of plant defense strategies that may be used in horticulture and agriculture.
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Affiliation(s)
- Yusuke Sakurai
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
| | - Satomi Ishizaki
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan.
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Jia Q, Liu Z, Guo C, Wang Y, Yang J, Yu Q, Wang J, Zheng F, Lu X. Relationship between Photosynthetic CO 2 Assimilation and Chlorophyll Fluorescence for Winter Wheat under Water Stress. PLANTS (BASEL, SWITZERLAND) 2023; 12:3365. [PMID: 37836105 PMCID: PMC10574178 DOI: 10.3390/plants12193365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/17/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023]
Abstract
Solar-induced chlorophyll fluorescence (SIF) has a high correlation with Gross Primary Production (GPP). However, studies focusing on the impact of drought on the SIF-GPP relationship have had mixed results at various scales, and the mechanisms controlling the dynamics between photosynthesis and fluorescence emission under water stress are not well understood. We developed a leaf-scale measurement system to perform concurrent measurements of active and passive fluorescence, and gas-exchange rates for winter wheat experiencing a one-month progressive drought. Our results confirmed that: (1) shifts in light energy allocation towards decreasing photochemistry (the quantum yields of photochemical quenching in PSII decreased from 0.42 to 0.21 under intermediate light conditions) and increasing fluorescence emissions (the quantum yields of fluorescence increased to 0.062 from 0.024) as drought progressed enhance the degree of nonlinearity of the SIF-GPP relationship, and (2) SIF alone has a limited capacity to track changes in the photosynthetic status of plants under drought conditions. However, by incorporating the water stress factor into a SIF-based mechanistic photosynthesis model, we show that drought-induced variations in a variety of key photosynthetic parameters, including stomatal conductance and photosynthetic CO2 assimilation, can be accurately estimated using measurements of SIF, photosynthetically active radiation, air temperature, and soil moisture as inputs. Our findings provide the experimental and theoretical foundations necessary for employing SIF mechanistically to estimate plant photosynthetic activity during periods of drought stress.
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Affiliation(s)
- Qianlan Jia
- College of Natural Resources and Environment, Northwest A&F University, Xianyang 712100, China; (Q.J.); (C.G.); (Y.W.)
| | - Zhunqiao Liu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Xianyang 712100, China; (Z.L.); (Q.Y.); (J.W.); (F.Z.)
| | - Chenhui Guo
- College of Natural Resources and Environment, Northwest A&F University, Xianyang 712100, China; (Q.J.); (C.G.); (Y.W.)
| | - Yakai Wang
- College of Natural Resources and Environment, Northwest A&F University, Xianyang 712100, China; (Q.J.); (C.G.); (Y.W.)
| | - Jingjing Yang
- The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Xianyang 712100, China;
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Xianyang 712100, China
| | - Qiang Yu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Xianyang 712100, China; (Z.L.); (Q.Y.); (J.W.); (F.Z.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Wang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Xianyang 712100, China; (Z.L.); (Q.Y.); (J.W.); (F.Z.)
| | - Fenli Zheng
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Xianyang 712100, China; (Z.L.); (Q.Y.); (J.W.); (F.Z.)
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Xianyang 712100, China
| | - Xiaoliang Lu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Xianyang 712100, China; (Z.L.); (Q.Y.); (J.W.); (F.Z.)
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Lacchini E, Venegas-Molina J, Goossens A. Structural and functional diversity in plant specialized metabolism signals and products: The case of oxylipins and triterpenes. CURRENT OPINION IN PLANT BIOLOGY 2023; 74:102371. [PMID: 37148672 DOI: 10.1016/j.pbi.2023.102371] [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: 12/22/2022] [Revised: 04/03/2023] [Accepted: 04/03/2023] [Indexed: 05/08/2023]
Abstract
Metabolic enzymes tend to evolve towards catalytic efficacy, precision and speed. This seems particularly true for ancient and conserved enzymes involved in fundamental cellular processes that are present virtually in every cell and organism and converting and producing relatively limited metabolite numbers. Nevertheless, sessile organisms like plants have an astonishing repertoire of specific (specialized) metabolites that, by numbers and chemical complexity, by far exceed primary metabolites. Most theories agree that early gene duplication, subsequent positive selection and diversifying evolution have allowed relaxed selection of duplicated metabolic genes, thus facilitating the accumulation of mutations that could broaden substrate/product specificity and lower activation barriers and kinetics. Here, we use oxylipins, oxygenated fatty acids of plastidial origin to which the phytohormone jasmonate belongs, and triterpenes, a large group of specialized metabolites whose biosynthesis is often elicited by jasmonates, to showcase the structural and functional diversity of chemical signals and products in plant metabolism.
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Affiliation(s)
- Elia Lacchini
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
| | - Jhon Venegas-Molina
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
| | - Alain Goossens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium.
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Jiang Y, Ye J, Niinemets Ü. Dose-dependent methyl jasmonate effects on photosynthetic traits and volatile emissions: biphasic kinetics and stomatal regulation. PLANT SIGNALING & BEHAVIOR 2021; 16:1917169. [PMID: 33879022 PMCID: PMC8204986 DOI: 10.1080/15592324.2021.1917169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Exogenous application of methyl jasmonate (MeJA) has been extensively used to study jasmonate-dependent signaling events triggered by biotic stresses. MeJA application leads to complex jasmonate-dependent physiological responses, including changes in stomatal openness and induction of emissions of a multitude of volatile compounds. Whether the alterations in stomatal conductance and emissions of MeJA-induced volatiles are quantitatively associated with MeJA dose, and whether the induced volatile emissions are regulated by modifications in stomatal conductance had been poorly known until recently. Our latest studies highlighted a biphasic kinetics of jasmonate-dependent volatile emissions induced by MeJA treatment in the model species cucumber (Cucumis sativus), indicating induction of an immediate stress response and subsequent gene-expression level response. Both the immediate and delayed responses were MeJA dose-dependent. The studies further demonstrated that stomata modulated the kinetics of emissions of water-soluble volatiles in a MeJA dose-dependent manner. These studies contribute to understanding of plant short- and long-term responses to different biotic stress severities as simulated by treatments with a range of MeJA doses corresponding to mild to acute stress.
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Affiliation(s)
- Yifan Jiang
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
- College of Horticulture, Nanjing Agricultural University, NanjingChina
| | - Jiayan Ye
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
- School of Forestry and Bio-Technology, Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Ülo Niinemets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
- School of Forestry and Bio-Technology, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Estonian Academy of Sciences, Tallinn, Estonia
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