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Mishra AK, Baek KH. Salicylic Acid Biosynthesis and Metabolism: A Divergent Pathway for Plants and Bacteria. Biomolecules 2021; 11:705. [PMID: 34065121 PMCID: PMC8150894 DOI: 10.3390/biom11050705] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/06/2021] [Accepted: 05/06/2021] [Indexed: 01/24/2023] Open
Abstract
Salicylic acid (SA) is an active secondary metabolite that occurs in bacteria, fungi, and plants. SA and its derivatives (collectively called salicylates) are synthesized from chorismate (derived from shikimate pathway). SA is considered an important phytohormone that regulates various aspects of plant growth, environmental stress, and defense responses against pathogens. Besides plants, a large number of bacterial species, such as Pseudomonas, Bacillus, Azospirillum, Salmonella, Achromobacter, Vibrio, Yersinia, and Mycobacteria, have been reported to synthesize salicylates through the NRPS/PKS biosynthetic gene clusters. This bacterial salicylate production is often linked to the biosynthesis of small ferric-ion-chelating molecules, salicyl-derived siderophores (known as catecholate) under iron-limited conditions. Although bacteria possess entirely different biosynthetic pathways from plants, they share one common biosynthetic enzyme, isochorismate synthase, which converts chorismate to isochorismate, a common precursor for synthesizing SA. Additionally, SA in plants and bacteria can undergo several modifications to carry out their specific functions. In this review, we will systematically focus on the plant and bacterial salicylate biosynthesis and its metabolism.
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Affiliation(s)
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Korea;
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Chen Q, Zhang R, Li D, Wang F. Integrating Transcriptome and Coexpression Network Analyses to Characterize Salicylic Acid- and Jasmonic Acid-Related Genes in Tolerant Poplars Infected with Rust. Int J Mol Sci 2021; 22:ijms22095001. [PMID: 34066822 PMCID: PMC8125932 DOI: 10.3390/ijms22095001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 11/16/2022] Open
Abstract
Melampsora larici-populina causes serious poplar foliar diseases called rust worldwide. Salicylic acid (SA) and jasmonic acid (JA) are important phytohormones that are related to plant defence responses. To investigate the transcriptome profiles of SA- and JA-related genes involved in poplar rust interaction, two tolerant poplars and one intolerant poplar were selected for this study. Weighted gene coexpression network analysis (WGCNA) was applied to characterize the changes in the transcriptome profiles and contents of SA and JA after infection with the virulent E4 race of M. larici-populina. In response to infection with the E4 race of M. larici-populina, tolerant symptoms were correlated with the expression of genes related to SA and JA biosynthesis, the levels of SA and JA, and the expression of defence-related genes downstream of SA and JA. Tolerant poplars could promptly regulate the occurrence of defence responses by activating or inhibiting SA or JA pathways in a timely manner, including regulating the expression of genes related to programmed cell death, such as Kunitz-type trypsin inhibitor (KTI), to limit the growth of E4 and protect themselves. WGCNA suggested that KTI might be regulated by a Cytochrome P450 family (CYP) gene. Some CYPs should play an important role in both JA- and SA-related pathways. In contrast, in intolerant poplar, the inhibition of SA-related defence signalling through increasing JA levels in the early stage led to continued inhibition of a large number of plant–pathogen interaction-related and signalling-related genes, including NBS-LRRs, EDS1, NDR1, WRKYs, and PRs. Therefore, timely activation or inhibition of the SA or JA pathways is the key difference between tolerant and intolerant poplars.
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Affiliation(s)
- Qiaoli Chen
- Key Laboratory of Alien Forest Pests Detection and Control-Heilongjiang Province, School of Forestry, Northeast Forestry University, Harbin 150040, China; (Q.C.); (R.Z.); (D.L.)
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Ruizhi Zhang
- Key Laboratory of Alien Forest Pests Detection and Control-Heilongjiang Province, School of Forestry, Northeast Forestry University, Harbin 150040, China; (Q.C.); (R.Z.); (D.L.)
| | - Danlei Li
- Key Laboratory of Alien Forest Pests Detection and Control-Heilongjiang Province, School of Forestry, Northeast Forestry University, Harbin 150040, China; (Q.C.); (R.Z.); (D.L.)
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Feng Wang
- Key Laboratory of Alien Forest Pests Detection and Control-Heilongjiang Province, School of Forestry, Northeast Forestry University, Harbin 150040, China; (Q.C.); (R.Z.); (D.L.)
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin 150040, China
- Correspondence: ; Tel.: +86-0451-82190384
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Gadolinium Protects Arabidopsis thaliana against Botrytis cinerea through the Activation of JA/ET-Induced Defense Responses. Int J Mol Sci 2021; 22:ijms22094938. [PMID: 34066536 PMCID: PMC8124739 DOI: 10.3390/ijms22094938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 01/30/2023] Open
Abstract
Plant food production is severely affected by fungi; to cope with this problem, farmers use synthetic fungicides. However, the need to reduce fungicide application has led to a search for alternatives, such as biostimulants. Rare-earth elements (REEs) are widely used as biostimulants, but their mode of action and their potential as an alternative to synthetic fungicides have not been fully studied. Here, the biostimulant effect of gadolinium (Gd) is explored using the plant-pathosystem Arabidopsis thaliana–Botrytis cinerea. We determine that Gd induces local, systemic, and long-lasting plant defense responses to B. cinerea, without affecting fungal development. The physiological changes induced by Gd have been related to its structural resemblance to calcium. However, our results show that the calcium-induced defense response is not sufficient to protect plants against B. cinerea, compared to Gd. Furthermore, a genome-wide transcriptomic analysis shows that Gd induces plant defenses and modifies early and late defense responses. However, the resistance to B. cinerea is dependent on JA/ET-induced responses. These data support the conclusion that Gd can be used as a biocontrol agent for B. cinerea. These results are a valuable tool to uncover the molecular mechanisms induced by REEs.
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Manacorda CA, Gudesblat G, Sutka M, Alemano S, Peluso F, Oricchio P, Baroli I, Asurmendi S. TuMV triggers stomatal closure but reduces drought tolerance in Arabidopsis. PLANT, CELL & ENVIRONMENT 2021; 44:1399-1416. [PMID: 33554358 DOI: 10.1111/pce.14024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 02/04/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Compatible plant viral infections are a common cause of agricultural losses worldwide. Characterization of the physiological responses controlling plant water management under combined stresses is of great interest in the current climate change scenario. We studied the outcome of TuMV infection on stomatal closure and water balance, hormonal balance and drought tolerance in Arabidopsis. TuMV infection reduced stomatal aperture concomitantly with diminished gas exchange rate, daily water consumption and rosette initial dehydration rate. Infected plants overaccumulated salicylic acid and abscisic acid and showed altered expression levels of key ABA homeostasis genes including biosynthesis and catabolism. Also the expression of ABA signalling gene ABI2 was induced and ABCG40 (which imports ABA into guard cells) was highly induced upon infection. Hypermorfic abi2-1 mutant plants, but no other ABA or SA biosynthetic, signalling or degradation mutants tested abolished both stomatal closure and low stomatal conductance phenotypes caused by TuMV. Notwithstanding lower relative water loss during infection, plants simultaneously subjected to drought and viral stresses showed higher mortality rates than mock-inoculated drought stressed controls, alongside downregulation of drought-responsive gene RD29A. Our findings indicate that despite stomatal closure triggered by TuMV, additional phenomena diminish drought tolerance upon infection.
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Affiliation(s)
- Carlos Augusto Manacorda
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Argentina
| | - Gustavo Gudesblat
- Departamento de Fisiología, Biología Molecular y Celular "Profesor Héctor Maldonado"- Instituto de Biociencias, Biotecnología y Biología Translacional (IB3), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Moira Sutka
- Departamento de Biodiversidad y Biología Experimental, Instituto de Biodiversidad, Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sergio Alemano
- Laboratorio de Fisiología Vegetal, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC. Instituto de Investigaciones Agrobiotecnológicas (INIAB-CONICET), Río Cuarto, Argentina
| | - Franco Peluso
- Instituto de Clima y Agua, CIRN, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Argentina
| | - Patricio Oricchio
- Instituto de Clima y Agua, CIRN, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Argentina
| | - Irene Baroli
- Departamento de Biodiversidad y Biología Experimental, Instituto de Biodiversidad, Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sebastián Asurmendi
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Argentina
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Hu L, Zhang K, Wu Z, Xu J, Erb M. Plant volatiles as regulators of plant defense and herbivore immunity: molecular mechanisms and unanswered questions. CURRENT OPINION IN INSECT SCIENCE 2021; 44:82-88. [PMID: 33894408 DOI: 10.1016/j.cois.2021.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
Plants release distinct blends of herbivore-induced plant volatiles (HIPVs) upon herbivore attack. HIPVs have long been known to influence the behavior of herbivores and natural enemies. In addition, HIPVs can act as physiological regulators that induce or prime plant defenses. Recent work indicates that the regulatory capacity of HIPVs may extend to herbivore immunity: herbivores that are exposed to HIPVs can become more resistant or susceptible to parasitoids and pathogens. While the mechanisms of HIPV-mediated plant defense regulation are being unraveled, the mechanisms underlying the regulation of herbivore immunity are unclear. Evidence so far suggests a high degree of context dependency. Here, we review the mechanisms by which HIPVs regulate plant defense and herbivore immunity. We address major gaps of knowledge and discuss directions for future mechanistic research to facilitate efforts to use the regulatory capacity of HIPVs for the biological control of insect pests.
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Affiliation(s)
- Lingfei Hu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
| | - Kaidi Zhang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Zhenwei Wu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Matthias Erb
- Institute of Plant Sciences, University of Bern, 3013 Bern, Switzerland
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Shemi R, Wang R, Gheith ESMS, Hussain HA, Hussain S, Irfan M, Cholidah L, Zhang K, Zhang S, Wang L. Effects of salicylic acid, zinc and glycine betaine on morpho-physiological growth and yield of maize under drought stress. Sci Rep 2021; 11:3195. [PMID: 33542287 PMCID: PMC7862227 DOI: 10.1038/s41598-021-82264-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 01/18/2021] [Indexed: 01/30/2023] Open
Abstract
Drought is one of the major environmental stresses that negatively affect the maize (Zea mays L.) growth and production throughout the world. Foliar applications of plant growth regulators, micronutrients or osmoprotectants for stimulating drought-tolerance in plants have been intensively reported. A controlled pot experiment was conducted to study the relative efficacy of salicylic acid (SA), zinc (Zn), and glycine betaine (GB) foliar applications on morphology, chlorophyll contents, relative water content (RWC), gas-exchange attributes, activities of antioxidant enzymes, accumulations of reactive oxygen species (ROS) and osmolytes, and yield attributes of maize plants exposed to two soil water conditions (85% field capacity: well-watered, 50% field capacity: drought stress) during critical growth stages. Drought stress significantly reduced the morphological parameters, yield and its components, RWC, chlorophyll contents, and gas-exchange parameters except for intercellular CO2 concentration, compared with well water conditions. However, the foliar applications considerably enhanced all the above parameters under drought. Drought stress significantly (p < 0.05) increased the hydrogen peroxide and superoxide anion contents, and enhanced the lipid peroxidation rate measured in terms of malonaldehyde (MDA) content. However, ROS and MDA contents were substantially decreased by foliar applications under drought stress. Antioxidant enzymes activity, proline content, and the soluble sugar were increased by foliar treatments under both well-watered and drought-stressed conditions. Overall, the application of GB was the most effective among all compounds to enhance the drought tolerance in maize through reduced levels of ROS, increased activities of antioxidant enzymes and higher accumulation of osmolytes contents.
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Affiliation(s)
- Ramadan Shemi
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China ,grid.7776.10000 0004 0639 9286Department of Agronomy, Faculty of Agriculture, Cairo University, Giza, 12613 Egypt
| | - Rui Wang
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China
| | - El-Sayed M. S. Gheith
- grid.7776.10000 0004 0639 9286Department of Agronomy, Faculty of Agriculture, Cairo University, Giza, 12613 Egypt
| | - Hafiz Athar Hussain
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China ,grid.410727.70000 0001 0526 1937Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| | - Saddam Hussain
- grid.413016.10000 0004 0607 1563Department of Agronomy, University of Agriculture, Faisalabad, 38040 Pakistan
| | - Muhammad Irfan
- Department of Agronomy, Zakaria University, Multan, 60800 Pakistan
| | - Linna Cholidah
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China
| | - Kangping Zhang
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China
| | - Sai Zhang
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China
| | - Longchang Wang
- grid.263906.8College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715 China
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Dehimeche N, Buatois B, Bertin N, Staudt M. Insights into the Intraspecific Variability of the above and Belowground Emissions of Volatile Organic Compounds in Tomato. Molecules 2021; 26:molecules26010237. [PMID: 33466378 PMCID: PMC7796079 DOI: 10.3390/molecules26010237] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 11/16/2022] Open
Abstract
The in-vivo monitoring of volatile organic compound (VOC) emissions is a potential non-invasive tool in plant protection, especially in greenhouse cultivation. We studied VOC production from above and belowground organs of the eight parents of the Multi-Parent Advanced Generation Intercross population (MAGIC) tomato population, which exhibits a high genetic variability, in order to obtain more insight into the variability of constitutive VOC emissions from tomato plants under stress-free conditions. Foliage emissions were composed of terpenes, the majority of which were also stored in the leaves. Foliage emissions were very low, partly light-dependent, and differed significantly among genotypes, both in quantity and quality. Soil with roots emitted VOCs at similar, though more variable, rates than foliage. Soil emissions were characterized by terpenes, oxygenated alkanes, and alkenes and phenolic compounds, only a few of which were found in root extracts at low concentrations. Correlation analyses revealed that several VOCs emitted from foliage or soil are jointly regulated and that above and belowground sources are partially interconnected. With respect to VOC monitoring in tomato crops, our results underline that genetic variability, light-dependent de-novo synthesis, and belowground sources are factors to be considered for successful use in crop monitoring.
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Affiliation(s)
- Nafissa Dehimeche
- Centre d’Ecologie Fonctionnelle et Evolutive, CNRS-Université Montpellier-Université Paul-Valéry Montpellier–EPHE, Campus CNRS, CEDEX 5, F-34293 Montpellier, France; (N.D.); (B.B.)
| | - Bruno Buatois
- Centre d’Ecologie Fonctionnelle et Evolutive, CNRS-Université Montpellier-Université Paul-Valéry Montpellier–EPHE, Campus CNRS, CEDEX 5, F-34293 Montpellier, France; (N.D.); (B.B.)
| | - Nadia Bertin
- INRAE, UR115 Plantes et Systèmes de Culture Horticoles, Site Agroparc, 84914 Avignon, France;
| | - Michael Staudt
- Centre d’Ecologie Fonctionnelle et Evolutive, CNRS-Université Montpellier-Université Paul-Valéry Montpellier–EPHE, Campus CNRS, CEDEX 5, F-34293 Montpellier, France; (N.D.); (B.B.)
- Correspondence: ; Tel.: +33-467613272
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Koley P, Brahmachari S, Saha A, Deb C, Mondal M, Das N, Das A, Lahiri S, Das M, Thakur M, Kundu S. Phytohormone Priming of Tomato Plants Evoke Differential Behavior in Rhizoctonia solani During Infection, With Salicylate Priming Imparting Greater Tolerance Than Jasmonate. FRONTIERS IN PLANT SCIENCE 2021; 12:766095. [PMID: 35082805 PMCID: PMC8784698 DOI: 10.3389/fpls.2021.766095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 12/06/2021] [Indexed: 05/14/2023]
Abstract
In the field of phytohormone defense, the general perception is that salicylate (SA)-mediated defense is induced against biotrophic pathogens while jasmonate (JA)-mediated defense functions against necrotrophic pathogens. Our goals were to observe the behavior of the necrotrophic pathogen Rhizoctonia solani in the vicinity, on the surface, and within the host tissue after priming the host with SA or JA, and to see if priming with these phytohormones would affect the host defense differently upon infection. It was observed for the first time, that R. solani could not only distinguish between JA versus SA-primed tomato plants from a distance, but surprisingly avoided SA-primed plants more than JA-primed plants. To corroborate these findings, early infection events were monitored and compared through microscopy, Scanning Electron Microscopy, and Confocal Laser Scanning Microscopy using transformed R. solani expressing green fluorescence protein gene (gfp). Different histochemical and physiological parameters were compared between the unprimed control, JA-primed, and SA-primed plants after infection. The expression of a total of fifteen genes, including the appressoria-related gene of the pathogen and twelve marker genes functioning in the SA and JA signaling pathways, were monitored over a time course during early infection stages. R. solani being traditionally designated as a necrotroph, the major unexpected observations were that Salicylate priming offered better tolerance than Jasmonate priming and that it was mediated through the activation of SA-mediated defense during the initial phase of infection, followed by JA-mediated defense in the later phase. Hence, the present scenario of biphasic SA-JA defense cascades during R. solani infection, with SA priming imparting maximum tolerance, indicate a possible hemibiotrophic pathosystem that needs to be investigated further.
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Seed Priming with Endophytic Bacillus subtilis Modulates Physiological Responses of Two Different Triticum aestivum L. Cultivars under Drought Stress. PLANTS 2020; 9:plants9121810. [PMID: 33371269 PMCID: PMC7766295 DOI: 10.3390/plants9121810] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 11/16/2022]
Abstract
The protective effects against drought stress of the endophytic bacterium Bacillus subtilis 10-4 were measured by studying the priming response in two wheat (Triticum aestivum L.)—Ekada70 (E70) and Salavat Yulaev (SY)—lines, tolerant and susceptible to drought, respectively. B. subtilis 10-4 improved germination and growth parameters under normal conditions in both cultivars with the most pronounced effect observed in cv. E70. Under drought conditions, B. subtilis 10-4 significantly ameliorated the negative impact of stress on germination and growth of cv. E70, but had no protective effect on cv. SY. B. subtilis 10-4 induced an increase in the levels of photosynthetic chlorophyll (Chl) a, Chl b, and carotenoids (Car) in the leaves of cv. E70, both under normal and drought conditions. In cv. SY plants, bacterial inoculation decreased the contents of Chl a, Chl b, and Car under normal conditions, but pigment content were almost recovered under drought stress. B. subtilis 10-4 increased water holding capacity (WHC) of cv. E70 (but did not affect this parameter in cv. SY) and prevented the stress-induced decline in WHC in both cultivars. Notably, B. subtilis 10-4 increased endogenous salicylic acid (SA) concentration in both cultivars, especially in cv. E70. Moreover, B. subtilis 10-4 reduced drought-induced endogenous SA accumulation, which was correlated with the influence of endophyte on growth, indicating a possible involvement of endogenous SA in the implementation of B. subtilis-mediated effects in both cultivars. Overall, B. subtilis 10-4 inoculation was found to increase drought tolerance in seedlings of both cultivars, as evidenced by decreased lipid peroxidation, proline content, and electrolyte leakage from tissues of wheat seedlings primed with B. subtilis 10-4 under drought conditions.
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Labudda M, Tokarz K, Tokarz B, Muszyńska E, Gietler M, Górecka M, Różańska E, Rybarczyk-Płońska A, Fidler J, Prabucka B, Dababat AA, Lewandowski M. Reactive oxygen species metabolism and photosynthetic performance in leaves of Hordeum vulgare plants co-infested with Heterodera filipjevi and Aceria tosichella. PLANT CELL REPORTS 2020; 39:1719-1741. [PMID: 32955612 PMCID: PMC7502656 DOI: 10.1007/s00299-020-02600-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 09/09/2020] [Indexed: 05/04/2023]
Abstract
KEY MESSAGE Defence responses of cyst nematode and/or wheat curl mite infested barley engage the altered reactive oxygen species production, antioxidant machinery, carbon dioxide assimilation and photosynthesis efficiency. The primary aim of this study was to determine how barley responds to two pests infesting separately or at once; thus barley was inoculated with Heterodera filipjevi (Madzhidov) Stelter (cereal cyst nematode; CCN) and Aceria tosichella Keifer (wheat curl mite; WCM). To verify hypothesis about the involvement of redox metabolism and photosynthesis in barley defence responses, biochemical, photosynthesis efficiency and chlorophyll a fluorescence measurements as well as transmission electron microscopy were implemented. Inoculation with WCM (apart from or with CCN) brought about a significant suppression in the efficiency of electron transport outside photosystem II reaction centres. This limitation was an effect of diminished pool of rapidly reducing plastoquinone and decreased total electron carriers. Infestation with WCM (apart from or with CCN) also significantly restricted the electron transport on the photosystem I acceptor side, therefore produced reactive oxygen species oxidized lipids in cells of WCM and double infested plants and proteins in cells of WCM-infested plants. The level of hydrogen peroxide was significantly decreased in double infested plants because of glutathione-ascorbate cycle involvement. The inhibition of nitrosoglutathione reductase promoted the accumulation of S-nitrosoglutathione increasing antioxidant capacity in cells of double infested plants. Moreover, enhanced arginase activity in WCM-infested plants could stimulate synthesis of polyamines participating in plant antioxidant response. Infestation with WCM (apart from or with CCN) significantly reduced the efficiency of carbon dioxide assimilation by barley leaves, whereas infection only with CCN expanded photosynthesis efficiency. These were accompanied with the ultrastructural changes in chloroplasts during CCN and WCM infestation.
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Affiliation(s)
- Mateusz Labudda
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.
| | - Krzysztof Tokarz
- Department of Botany, Physiology and Plant Protection, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Krakow, Poland
| | - Barbara Tokarz
- Department of Botany, Physiology and Plant Protection, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Krakow, Poland
| | - Ewa Muszyńska
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Marta Gietler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Mirosława Górecka
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Elżbieta Różańska
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Anna Rybarczyk-Płońska
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Justyna Fidler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Beata Prabucka
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Abdelfattah A Dababat
- International Maize and Wheat Improvement Center (CIMMYT), Soil Borne Pathogens Program, Ankara, Turkey
| | - Mariusz Lewandowski
- Department of Plant Protection, Section of Applied Entomology, Institute of Horticultural Sciences, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
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Gene Mapping, Genome-Wide Transcriptome Analysis, and WGCNA Reveals the Molecular Mechanism for Triggering Programmed Cell Death in Rice Mutant pir1. PLANTS 2020; 9:plants9111607. [PMID: 33228024 PMCID: PMC7699392 DOI: 10.3390/plants9111607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 11/17/2020] [Accepted: 11/17/2020] [Indexed: 01/13/2023]
Abstract
Programmed cell death (PCD) is involved in plant growth and development and in resistance to biotic and abiotic stress. To understand the molecular mechanism that triggers PCD, phenotypic and physiological analysis was conducted using the first three leaves of mutant rice PCD-induced-resistance 1(pir1) and its wild-type ZJ22. The 2nd and 3rd leaves of pir1 had a lesion mimic phenotype, which was shown to be an expression of PCD induced by H2O2-accumulation. The PIR1 gene was mapped in a 498 kb-interval between the molecular markers RM3321 and RM3616 on chromosome 5, and further analysis suggested that the PCD phenotype of pir1 is controlled by a novel gene for rice PCD. By comparing the mutant with wild type rice, 1679, 6019, and 4500 differentially expressed genes (DEGs) were identified in the three leaf positions, respectively. KEGG analysis revealed that DEGs were most highly enriched in phenylpropanoid biosynthesis, alpha-linolenic acid metabolism, and brassinosteroid biosynthesis. In addition, conjoint analysis of transcriptome data by weighted gene co-expression network analysis (WGCNA) showed that the turquoise module of the 18 identified modules may be related to PCD. There are close interactions or indirect cross-regulations between the differential genes that are significantly enriched in the phenylpropanoid biosynthesis pathway and the hormone biosynthesis pathway in this module, which indicates that these genes may respond to and trigger PCD.
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Baruah I, Baldodiya GM, Sahu J, Baruah G. Dissecting the Role of Promoters of Pathogen-sensitive Genes in Plant Defense. Curr Genomics 2020; 21:491-503. [PMID: 33214765 PMCID: PMC7604749 DOI: 10.2174/1389202921999200727213500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/15/2020] [Accepted: 06/30/2020] [Indexed: 11/22/2022] Open
Abstract
Plants inherently show resistance to pathogen attack but are susceptible to multiple bacteria, viruses, fungi, and phytoplasmas. Diseases as a result of such infection leads to the deterioration of crop yield. Several pathogen-sensitive gene activities, promoters of such genes, associated transcription factors, and promoter elements responsible for crosstalk between the defense signaling pathways are involved in plant resistance towards a pathogen. Still, only a handful of genes and their promoters related to plant resistance have been identified to date. Such pathogen-sensitive promoters are accountable for elevating the transcriptional activity of certain genes in response to infection. Also, a suitable promoter is a key to devising successful crop improvement strategies as it ensures the optimum expression of the required transgene. The study of the promoters also helps in mining more details about the transcription factors controlling their activities and helps to unveil the involvement of new genes in the pathogen response. Therefore, the only way out to formulate new solutions is by analyzing the molecular aspects of these promoters in detail. In this review, we provided an overview of the promoter motifs and cis-regulatory elements having specific roles in pathogen attack response. To elaborate on the importance and get a vivid picture of the pathogen-sensitive promoter sequences, the key motifs and promoter elements were analyzed with the help of PlantCare and interpreted with available literature. This review intends to provide useful information for reconstructing the gene networks underlying the resistance of plants against pathogens.
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Affiliation(s)
| | | | - Jagajjit Sahu
- Address correspondence to these authors at the Department of Mycology & Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University (BHU), Varanasi-221005, Uttar Pradesh, India;, E-mail: ; Environment Division, Assam Science Technology & Environment Council, Bigyan Bhawan, Guwahati-781005, Assam, India; E-mail:
| | - Geetanjali Baruah
- Address correspondence to these authors at the Department of Mycology & Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University (BHU), Varanasi-221005, Uttar Pradesh, India;, E-mail: ; Environment Division, Assam Science Technology & Environment Council, Bigyan Bhawan, Guwahati-781005, Assam, India; E-mail:
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63
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Meena KK, Bitla UM, Sorty AM, Singh DP, Gupta VK, Wakchaure GC, Kumar S. Mitigation of Salinity Stress in Wheat Seedlings Due to the Application of Phytohormone-Rich Culture Filtrate Extract of Methylotrophic Actinobacterium Nocardioides sp. NIMMe6. Front Microbiol 2020; 11:2091. [PMID: 33071995 PMCID: PMC7531191 DOI: 10.3389/fmicb.2020.02091] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 08/08/2020] [Indexed: 01/02/2023] Open
Abstract
Salinity stress is an important plant growth limiting factor influencing crop productivity negatively. Microbial interventions for salinity stress mitigation have invited significant attention due to the promising impacts of interactive associations on the intrinsic mechanisms of plants. We report the impact of microbial inoculation of a halotolerant methylotrophic actinobacterium (Nocardioides sp. NIMMe6; LC140963) and seed coating of its phytohormone-rich bacterial culture filtrate extract (BCFE) on wheat seedlings grown under saline conditions. Different plant-growth-promoting (PGP) attributes of the bacterium in terms of its growth in N-limiting media and siderophore and phytohormone [indole-3-acetic acid (IAA) and salicylic acid] production influenced plant growth positively. Microbial inoculation and priming with BCFE resulted in improved germination (92% in primed seeds at 10 dS m–1), growth, and biochemical accumulation (total protein 42.01 and 28.75 mg g–1 in shoot and root tissues at 10 dS m–1 in BCFE-primed seeds) and enhanced the activity level of antioxidant enzymes (superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase) to confer stress mitigation. Biopriming with BCFE proved impactful. The BCFE application has further influenced the overexpression of defense-related genes in the seedlings grown under salinity stress condition. Liquid chromatography–mass spectrometry-based characterization of the biomolecules in the BCFE revealed quantification of salicylate and indole-3-acetate (Rt 4.978 min, m/z 138.1 and 6.177 min, 129.1), respectively. The high tolerance limit of the bacterium to 10% NaCl in the culture media suggested its possible survival and growth under high soil salinity condition as microbial inoculant. The production of a high quantity of IAA (45.6 μg ml–1 of culture filtrate) by the bacterium reflected its capability to not only support plant growth under salinity condition but also mitigate stress due to the impact of phytohormone as defense mitigators. The study suggested that although microbial inoculation offers stress mitigation in plants, the phytohormone-rich BCFE from Nocardioides sp. NIMMe6 has potential implications for defense against salinity stress in wheat.
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Affiliation(s)
- Kamlesh K Meena
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Utkarsh M Bitla
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Ajay M Sorty
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Dhananjaya P Singh
- ICAR-National Bureau of Agriculturally Important Microorganisms, Mau, India
| | - Vijai K Gupta
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia
| | - G C Wakchaure
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Satish Kumar
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
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64
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Nasonova A, Cohen Y, Poverenov E, Borisover M. Binding interactions of salicylic acid with chitosan and its N-alkylated derivative in solutions: An equilibrium dialysis study. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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65
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66
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Autophagy Dances with Phytohormones upon Multiple Stresses. PLANTS 2020; 9:plants9081038. [PMID: 32824209 PMCID: PMC7463709 DOI: 10.3390/plants9081038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 12/12/2022]
Abstract
Autophagy is an evolutionarily conserved process for turning over unwanted cellular components, thus promoting nutrient recycling and maintaining cellular homeostasis, which eventually enables plants to survive unfavorable growth conditions. In addition to plant growth and development, previous studies have demonstrated that autophagy is involved in the responses to various environmental challenges through interplaying with multiple phytohormones, including abscisic acid (ABA), jasmonic acid (JA), and salicylic acid (SA). In this review, we summarize the advances made in their synergistic interactions in response to multiple abiotic and biotic stresses; we also discuss the remaining issues and perspectives regarding their crosstalk.
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67
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Koch KG, Palmer NA, Donze-Reiner T, Scully ED, Seravalli J, Amundsen K, Twigg P, Louis J, Bradshaw JD, Heng-Moss TM, Sarath G. Aphid-Responsive Defense Networks in Hybrid Switchgrass. FRONTIERS IN PLANT SCIENCE 2020; 11:1145. [PMID: 32849703 PMCID: PMC7412557 DOI: 10.3389/fpls.2020.01145] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/14/2020] [Indexed: 05/30/2023]
Abstract
Aphid herbivory elicits plant defense-related networks that are influenced by host genetics. Plants of the upland switchgrass (Panicum virgatum) cultivar Summer can be a suitable host for greenbug aphids (Schizaphis graminum; GB), and yellow sugarcane aphids (Sipha flava, YSA), whereas the lowland cultivar Kanlow exhibited multi-species resistance that curtails aphid reproduction. However, stabilized hybrids of Summer (♀) x Kanlow (♂) (SxK) with improved agronomics can be damaged by both aphids. Here, hormone and metabolite analyses, coupled with RNA-Seq analysis of plant transcriptomes, were utilized to delineate defense networks induced by aphid feeding in SxK switchgrass and pinpoint plant transcription factors (TFs), such as WRKYs that potentially regulate these responses. Abscisic acid (ABA) levels were significantly higher in GB infested plants at 5 and 10 days after infestation (DAI). ABA levels were highest at 15DAI in YSA infested plants. Jasmonic acid levels were significantly elevated under GB infestation, while salicylic acid levels were signifi40cantly elevated only at 15 DAI in YSA infested plants. Similarly, levels of several metabolites were altered in common or specifically to each aphid. YSA infestation induced a significant enrichment of flavonoids consistent with an upregulation of many genes associated with flavonoid biosynthesis at 15DAI. Gene co-expression modules that responded singly to either aphid or in common to both aphids were differentiated and linked to specific TFs. Together, these data provide important clues into the interplay of metabolism and transcriptional remodeling accompanying defense responses to aphid herbivory in hybrid switchgrass.
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Affiliation(s)
- Kyle G. Koch
- Department of Entomology, University of Nebraska at Lincoln, Lincoln, NE, United States
| | - Nathan A. Palmer
- Wheat, Sorghum, and Forage Research Unit, USDA-ARS, Lincoln, NE, United States
- Department of Agronomy and Horticulture, University of Nebraska at Lincoln, Lincoln, NE, United States
| | - Teresa Donze-Reiner
- Biology Department, West Chester University of Pennsylvania, West Chester, PA, United States
| | - Erin D. Scully
- Stored Product Insect and Engineering Research Unit, USDA-ARS, Manhattan, KS, United States
| | - Javier Seravalli
- Redox Biology Center, Department of Biochemistry, University of Nebraska at Lincoln, Lincoln, NE, United States
| | - Keenan Amundsen
- Department of Agronomy and Horticulture, University of Nebraska at Lincoln, Lincoln, NE, United States
| | - Paul Twigg
- Biology Department, University of Nebraska at Kearney, Kearney, NE, United States
| | - Joe Louis
- Department of Entomology, University of Nebraska at Lincoln, Lincoln, NE, United States
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Jeffrey D. Bradshaw
- Department of Entomology, University of Nebraska at Lincoln, Lincoln, NE, United States
| | | | - Gautam Sarath
- Wheat, Sorghum, and Forage Research Unit, USDA-ARS, Lincoln, NE, United States
- Department of Agronomy and Horticulture, University of Nebraska at Lincoln, Lincoln, NE, United States
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68
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Masimbula R, Oki K, Takahashi K, Matsuura H. Metabolism of airborne methyl salicylate in adjacent plants. Biosci Biotechnol Biochem 2020; 84:1780-1787. [PMID: 32479137 DOI: 10.1080/09168451.2020.1769465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Salicylic acid (SA) and methyl salicylate (MeSA) are synthesized in many plants and are crucial components that establish their disease responses. The metabolism of airborne MeSA to SA has been previously reported. In this report, it was found that SA glucose ester (SAGE), ether (SAG), and salicyloyl-L-aspartic acid (SA-Asp) are metabolites of airborne MeSA. Furthermore, it was found that airborne MeSA was able to increase the endogenous amount of rosmarinic acid in Perilla frutescens, which is known as one of the functional components that contributes to the maintenance of human health.
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Affiliation(s)
- Rishni Masimbula
- Division of Fundamental AgriScience, Research Faculty of Agriculture, Hokkaido University , Sapporo, Japan
| | - Katsunari Oki
- Division of Fundamental AgriScience, Research Faculty of Agriculture, Hokkaido University , Sapporo, Japan
| | - Kosaku Takahashi
- Division of Fundamental AgriScience, Research Faculty of Agriculture, Hokkaido University , Sapporo, Japan
| | - Hideyuki Matsuura
- Division of Fundamental AgriScience, Research Faculty of Agriculture, Hokkaido University , Sapporo, Japan
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69
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van Butselaar T, Van den Ackerveken G. Salicylic Acid Steers the Growth-Immunity Tradeoff. TRENDS IN PLANT SCIENCE 2020; 25:566-576. [PMID: 32407696 DOI: 10.1016/j.tplants.2020.02.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/31/2020] [Accepted: 02/04/2020] [Indexed: 05/10/2023]
Abstract
Plants possess an effective immune system to combat most microbial attackers. The activation of immune responses to biotrophic pathogens requires the hormone salicylic acid (SA). Accumulation of SA triggers a plethora of immune responses (like massive transcriptional reprogramming, cell wall strengthening, and production of secondary metabolites and antimicrobial proteins). A tradeoff of strong immune responses is the active suppression of plant growth and development. The tradeoff also works the opposite way, where active growth and developmental processes suppress SA production and immune responses. Here, we review research on the role of SA in the growth-immunity tradeoff and examples of how the tradeoff can be bypassed. This knowledge will be instrumental in resistance breeding of crops with optimal growth and effective immunity.
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Affiliation(s)
- Tijmen van Butselaar
- Plant-Microbe Interactions, Department of Biology, Utrecht University, 3584CH Utrecht, The Netherlands.
| | - Guido Van den Ackerveken
- Plant-Microbe Interactions, Department of Biology, Utrecht University, 3584CH Utrecht, The Netherlands.
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70
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Ehlers BK, Berg MP, Staudt M, Holmstrup M, Glasius M, Ellers J, Tomiolo S, Madsen RB, Slotsbo S, Penuelas J. Plant Secondary Compounds in Soil and Their Role in Belowground Species Interactions. Trends Ecol Evol 2020; 35:716-730. [PMID: 32414604 DOI: 10.1016/j.tree.2020.04.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 11/24/2022]
Abstract
Knowledge of the effect of plant secondary compounds (PSCs) on belowground interactions in the more diffuse community of species living outside the rhizosphere is sparse compared with what we know about how PSCs affect aboveground interactions. We illustrate here that PSCs from foliar tissue, root exudates, and leaf litter effectively influence such belowground plant-plant, plant-microorganism, and plant-soil invertebrate interactions. Climatic factors can induce PSC production and select for different plant chemical types. Therefore, climate change can alter both quantitative and qualitative PSC production, and how these compounds move in the soil. This can change the soil chemical environment, with cascading effects on both the ecology and evolution of belowground species interactions and, ultimately, soil functioning.
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Affiliation(s)
- Bodil K Ehlers
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - Matty P Berg
- Community and Conservation Ecology Group, Groningen Institute of Evolutionary Life Sciences, University of Groningen, Nijenborgh 7, 9747, AG, Groningen, The Netherlands; Department of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands
| | - Michael Staudt
- CEFE, CNRS, Univ Montpellier, Univ Paul Valéry Montpellier 3, EPHE, IRD, 1919 Route de Mende, 34293 Montpellier, France
| | - Martin Holmstrup
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - Marianne Glasius
- Department of Chemistry and Interdisciplinary Nanoscience Center, Langelandsgade 140, 8000 Århus, Denmark
| | - Jacintha Ellers
- Department of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands
| | - Sara Tomiolo
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark; Plant Ecology Group, Institute for Evolution and Ecology, Tübingen University, Auf der Morgenstelle 5, 72076 Tübingen, Germany
| | - René B Madsen
- Department of Chemistry and Interdisciplinary Nanoscience Center, Langelandsgade 140, 8000 Århus, Denmark
| | - Stine Slotsbo
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - Josep Penuelas
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08193 Bellaterra, Catalonia, Spain; CREAF, 08193 Cerdanyola del Vallès, Catalonia, Spain.
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71
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Narváez-Barragán DA, Tovar-Herrera OE, Torres M, Rodríguez M, Humphris S, Toth IK, Segovia L, Serrano M, Martínez-Anaya C. Expansin-like Exl1 from Pectobacterium is a virulence factor required for host infection, and induces a defence plant response involving ROS, and jasmonate, ethylene and salicylic acid signalling pathways in Arabidopsis thaliana. Sci Rep 2020; 10:7747. [PMID: 32385404 PMCID: PMC7210985 DOI: 10.1038/s41598-020-64529-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 04/17/2020] [Indexed: 01/09/2023] Open
Abstract
Expansins are encoded by some phytopathogenic bacteria and evidence indicates that they act as virulence factors for host infection. Here we analysed the expression of exl1 by Pectobacterium brasiliense and Pectobacterium atrosepticum. In both, exl1 gene appears to be under quorum sensing control, and protein Exl1 can be observed in culture medium and during plant infection. Expression of exl1 correlates with pathogen virulence, where symptoms are reduced in a Δexl1 mutant strain of P. atrosepticum. As well as Δexl1 exhibiting less maceration of potato plants, fewer bacteria are observed at distance from the inoculation site. However, bacteria infiltrated into the plant tissue are as virulent as the wild type, suggesting that this is due to alterations in the initial invasion of the tissue. Additionally, swarming from colonies grown on MacConkey soft agar was delayed in the mutant in comparison to the wild type. We found that Exl1 acts on the plant tissue, probably by remodelling of a cell wall component or altering the barrier properties of the cell wall inducing a plant defence response, which results in the production of ROS and the induction of marker genes of the JA, ET and SA signalling pathways in Arabidopsis thaliana. Exl1 inactive mutants fail to trigger such responses. This defence response is protective against Pectobacterium brasiliense and Botrytis cinerea in more than one plant species.
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Affiliation(s)
- Delia A Narváez-Barragán
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico
| | - Omar E Tovar-Herrera
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico
- Department of Biomolecular Sciences, The Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Martha Torres
- Centro de Ciencias Genómicas. Universidad Nacional Autónoma de México, 62110, Cuernavaca, Morelos, Mexico
| | - Mabel Rodríguez
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico
| | - Sonia Humphris
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
| | - Ian K Toth
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
| | - Lorenzo Segovia
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico
| | - Mario Serrano
- Centro de Ciencias Genómicas. Universidad Nacional Autónoma de México, 62110, Cuernavaca, Morelos, Mexico
| | - Claudia Martínez-Anaya
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico.
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72
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Lefevere H, Bauters L, Gheysen G. Salicylic Acid Biosynthesis in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:338. [PMID: 32362901 PMCID: PMC7182001 DOI: 10.3389/fpls.2020.00338] [Citation(s) in RCA: 215] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/06/2020] [Indexed: 05/19/2023]
Abstract
Salicylic acid (SA) is an important plant hormone that is best known for mediating host responses upon pathogen infection. Its role in plant defense activation is well established, but its biosynthesis in plants is not fully understood. SA is considered to be derived from two possible pathways; the ICS and PAL pathway, both starting from chorismate. The importance of both pathways for biosynthesis differs between plant species, rendering it hard to make generalizations about SA production that cover the entire plant kingdom. Yet, understanding SA biosynthesis is important to gain insight into how plant pathogen responses function and how pathogens can interfere with them. In this review, we have taken a closer look at how SA is synthesized and the importance of both biosynthesis pathways in different plant species.
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Affiliation(s)
| | | | - Godelieve Gheysen
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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73
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Liao CY, Bassham DC. Combating stress: the interplay between hormone signaling and autophagy in plants. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:1723-1733. [PMID: 31725881 PMCID: PMC7067298 DOI: 10.1093/jxb/erz515] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 11/13/2019] [Indexed: 05/18/2023]
Abstract
Autophagy is a conserved recycling process in which cellular components are delivered to and degraded in the vacuole/lysosome for reuse. In plants, it assists in responding to dynamic environmental conditions and maintaining metabolite homeostasis under normal or stress conditions. Under stress, autophagy is activated to remove damaged components and to recycle nutrients for survival, and the energy sensor kinases target of rapamycin (TOR) and SNF-related kinase 1 (SnRK1) are key to this activation. Here, we discuss accumulating evidence that hormone signaling plays critical roles in regulating autophagy and plant stress responses, although the molecular mechanisms by which this occurs are often not clear. Several hormones have been shown to regulate TOR activity during stress, in turn controlling autophagy. Hormone signaling can also regulate autophagy gene expression, while, reciprocally, autophagy can regulate hormone synthesis and signaling pathways. We highlight how the interplay between major energy sensors, plant hormones, and autophagy under abiotic and biotic stress conditions can assist in plant stress tolerance.
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Affiliation(s)
- Ching-Yi Liao
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA
| | - Diane C Bassham
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA
- Correspondence:
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74
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Scartazza A, Fambrini M, Mariotti L, Picciarelli P, Pugliesi C. Energy conversion processes and related gene expression in a sunflower mutant with altered salicylic acid metabolism. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 148:122-132. [PMID: 31958679 DOI: 10.1016/j.plaphy.2020.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/27/2019] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
Salicylic acid (SA) is involved in several responses associated with plant development and defence against biotic and abiotic stress, but its role on photosynthetic regulation is still under debate. This work investigated energy conversion processes and related gene expression in the brachytic mutant of sunflower lingering hope (linho). This mutant was characterized by a higher ratio between the free SA form and its conjugate form SA O-β-D-glucoside (SAG) compared to wild type (WT), without significant changes in the endogenous level of abscisic acid and hydrogen peroxide. The mutant showed an inhibition of photosynthesis due to a combination of both stomatal and non-stomatal limitations, although the latter seemed to play a major role. The reduced carboxylation efficiency was associated with a down-regulation of the gene expression for both the large and small subunits of Rubisco and the Rubisco activase enzyme. Moreover, linho showed an alteration of photosystem II (PSII) functionality, with reduced PSII photochemistry, increased PSII excitation pressure and decreased thermal energy dissipation of excessive light energy. These responses were associated with a lower photosynthetic pigments concentration and a reduced expression of genes encoding for light-harvesting chlorophyll a/b binding proteins (i.e. HaLhcA), chlorophyll binding subunits of PSII proteins (i.e. HaPsbS and HaPsbX), phytoene synthase enzyme and a different expression level for genes related to PSII repair cycle, such as HaPsbA and HaPsbD. The concomitant stimulation of respiratory metabolism, suggests that linho activated a coordinate modulation of chloroplast and mitochondria activities to compensate the energy imbalance and regulate energy conversion processes.
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Affiliation(s)
- Andrea Scartazza
- Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), Via Moruzzi 1, I-56124, Pisa, Italy.
| | - Marco Fambrini
- Department of Agriculture, Food and Environment (DAFE), University of Pisa, Via del Borghetto 80, I-56124, Pisa, Italy
| | - Lorenzo Mariotti
- Department of Agriculture, Food and Environment (DAFE), University of Pisa, Via del Borghetto 80, I-56124, Pisa, Italy.
| | - Piero Picciarelli
- Department of Agriculture, Food and Environment (DAFE), University of Pisa, Via del Borghetto 80, I-56124, Pisa, Italy
| | - Claudio Pugliesi
- Department of Agriculture, Food and Environment (DAFE), University of Pisa, Via del Borghetto 80, I-56124, Pisa, Italy
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75
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Poór P. Effects of Salicylic Acid on the Metabolism of Mitochondrial Reactive Oxygen Species in Plants. Biomolecules 2020; 10:E341. [PMID: 32098073 PMCID: PMC7072379 DOI: 10.3390/biom10020341] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/11/2020] [Accepted: 02/18/2020] [Indexed: 01/16/2023] Open
Abstract
Different abiotic and biotic stresses lead to the production and accumulation of reactive oxygen species (ROS) in various cell organelles such as in mitochondria, resulting in oxidative stress, inducing defense responses or programmed cell death (PCD) in plants. In response to oxidative stress, cells activate various cytoprotective responses, enhancing the antioxidant system, increasing the activity of alternative oxidase and degrading the oxidized proteins. Oxidative stress responses are orchestrated by several phytohormones such as salicylic acid (SA). The biomolecule SA is a key regulator in mitochondria-mediated defense signaling and PCD, but the mode of its action is not known in full detail. In this review, the current knowledge on the multifaceted role of SA in mitochondrial ROS metabolism is summarized to gain a better understanding of SA-regulated processes at the subcellular level in plant defense responses.
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Affiliation(s)
- Péter Poór
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
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Zubo YO, Schaller GE. Role of the Cytokinin-Activated Type-B Response Regulators in Hormone Crosstalk. PLANTS 2020; 9:plants9020166. [PMID: 32019090 PMCID: PMC7076656 DOI: 10.3390/plants9020166] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 01/24/2020] [Accepted: 01/24/2020] [Indexed: 02/06/2023]
Abstract
Cytokinin is an important phytohormone that employs a multistep phosphorelay to transduce the signal from receptors to the nucleus, culminating in activation of type-B response regulators which function as transcription factors. Recent chromatin immunoprecipitation-sequencing (ChIP-seq) studies have identified targets of type-B ARABIDOPSIS RESPONSE REGULATORs (ARRs) and integrated these into the cytokinin-activated transcriptional network. Primary targets of the type-B ARRs are enriched for genes involved in hormonal regulation, emphasizing the extensive crosstalk that can occur between cytokinin, auxin, abscisic acid, brassinosteroids, gibberellic acid, ethylene, jasmonic acid, and salicylic acid. Examination of hormone-related targets reveals multiple regulatory points including biosynthesis, degradation/inactivation, transport, and signal transduction. Here, we consider this early response to cytokinin in terms of the hormones involved, points of regulatory crosstalk, and physiological significance.
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Sharma A, Sidhu GPS, Araniti F, Bali AS, Shahzad B, Tripathi DK, Brestic M, Skalicky M, Landi M. The Role of Salicylic Acid in Plants Exposed to Heavy Metals. Molecules 2020; 25:540. [PMID: 31991931 PMCID: PMC7037467 DOI: 10.3390/molecules25030540,] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023] Open
Abstract
Salicylic acid (SA) is a very simple phenolic compound (a C7H6O3 compound composed of an aromatic ring, one carboxylic and a hydroxyl group) and this simplicity contrasts with its high versatility and the involvement of SA in several plant processes either in optimal conditions or in plants facing environmental cues, including heavy metal (HM) stress. Nowadays, a huge body of evidence has unveiled that SA plays a pivotal role as plant growth regulator and influences intra- and inter-plant communication attributable to its methyl ester form, methyl salicylate, which is highly volatile. Under stress, including HM stress, SA interacts with other plant hormones (e.g., auxins, abscisic acid, gibberellin) and promotes the stimulation of antioxidant compounds and enzymes thereby alerting HM-treated plants and helping in counteracting HM stress. The present literature survey reviews recent literature concerning the roles of SA in plants suffering from HM stress with the aim of providing a comprehensive picture about SA and HM, in order to orientate the direction of future research on this topic.
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Affiliation(s)
- Anket Sharma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Correspondence: (A.S.); (F.A.); (M.L.)
| | - Gagan Preet Singh Sidhu
- Department of Environment Education, Government College of Commerce and Business Administration, Chandigarh 160047, India;
| | - Fabrizio Araniti
- Dipartimento AGRARIA, Università Mediterranea di Reggio Calabria, Località Feo di Vito, SNC I-89124 Reggio Calabria, RC, Italy
- Correspondence: (A.S.); (F.A.); (M.L.)
| | | | - Babar Shahzad
- School of Land and Food, University of Tasmania, Hobart, TAS 7005, Australia;
| | - Durgesh Kumar Tripathi
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Noida 201313, India;
| | - Marian Brestic
- Department of Plant Physiology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, 94976 Nitra, Slovakia;
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, 16500 Prague, Czech Republic;
| | - Milan Skalicky
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, 16500 Prague, Czech Republic;
| | - Marco Landi
- Department of Agriculture, Food and Environment, University of Pisa, I-56124 Pisa, Italy
- CIRSEC, Centre for Climatic Change Impact, University of Pisa, Via del Borghetto 80, I-56124 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, I-56124 Pisa, Italy
- Correspondence: (A.S.); (F.A.); (M.L.)
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Sharma A, Sidhu GPS, Araniti F, Bali AS, Shahzad B, Tripathi DK, Brestic M, Skalicky M, Landi M. The Role of Salicylic Acid in Plants Exposed to Heavy Metals. Molecules 2020; 25:E540. [PMID: 31991931 PMCID: PMC7037467 DOI: 10.3390/molecules25030540] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/23/2020] [Accepted: 01/25/2020] [Indexed: 12/18/2022] Open
Abstract
Salicylic acid (SA) is a very simple phenolic compound (a C7H6O3 compound composed of an aromatic ring, one carboxylic and a hydroxyl group) and this simplicity contrasts with its high versatility and the involvement of SA in several plant processes either in optimal conditions or in plants facing environmental cues, including heavy metal (HM) stress. Nowadays, a huge body of evidence has unveiled that SA plays a pivotal role as plant growth regulator and influences intra- and inter-plant communication attributable to its methyl ester form, methyl salicylate, which is highly volatile. Under stress, including HM stress, SA interacts with other plant hormones (e.g., auxins, abscisic acid, gibberellin) and promotes the stimulation of antioxidant compounds and enzymes thereby alerting HM-treated plants and helping in counteracting HM stress. The present literature survey reviews recent literature concerning the roles of SA in plants suffering from HM stress with the aim of providing a comprehensive picture about SA and HM, in order to orientate the direction of future research on this topic.
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Affiliation(s)
- Anket Sharma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Gagan Preet Singh Sidhu
- Department of Environment Education, Government College of Commerce and Business Administration, Chandigarh 160047, India;
| | - Fabrizio Araniti
- Dipartimento AGRARIA, Università Mediterranea di Reggio Calabria, Località Feo di Vito, SNC I-89124 Reggio Calabria, RC, Italy
| | | | - Babar Shahzad
- School of Land and Food, University of Tasmania, Hobart, TAS 7005, Australia;
| | - Durgesh Kumar Tripathi
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Noida 201313, India;
| | - Marian Brestic
- Department of Plant Physiology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, 94976 Nitra, Slovakia;
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, 16500 Prague, Czech Republic;
| | - Milan Skalicky
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, 16500 Prague, Czech Republic;
| | - Marco Landi
- Department of Agriculture, Food and Environment, University of Pisa, I-56124 Pisa, Italy
- CIRSEC, Centre for Climatic Change Impact, University of Pisa, Via del Borghetto 80, I-56124 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, I-56124 Pisa, Italy
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Janda T, Lejmel MA, Molnár AB, Majláth I, Pál M, Nguyen QT, Nguyen NT, Le VN, Szalai G. Interaction between elevated temperature and different types of Na-salicylate treatment in Brachypodium dystachion. PLoS One 2020; 15:e0227608. [PMID: 31931519 PMCID: PMC6957344 DOI: 10.1371/journal.pone.0227608] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/22/2019] [Indexed: 12/05/2022] Open
Abstract
Salicylic acid (SA) plays a role in several physiological processes in plants. Exogenously applied SA is a promising tool to reduce stress sensitivity. However, the mode of action may depend on how the treatment was performed and environmental conditions may alter the effects of SA. In the present study the physiological and biochemical effects of different modes of application (soaking seeds prior sowing; spraying leaves with 0.5 mM NaSA) were compared at normal and moderately elevated temperatures (4 h; 35°C) in Brachypodium distachyon (L.) P. Beauv. plants. While soaking the seeds stimulated plant growth, spraying caused mild stress, as indicated by the chlorophyll-a fluorescence induction parameters and changes in certain protective compounds, such as glutathione, flavonoids or antioxidant enzymes. Elevated temperature also caused an increase in the glutathione-S-transferase activity, and this increase was more pronounced in plants pre-treated with NaSA. Both seed soaking or spraying with NaSA and exposure to heat treatment at 35°C reduced the abscisic acid levels in the leaves. In contrast to abscisic acid, the jasmonic acid level in the leaves were increased by both spraying and heat treatment. The present results suggest that different modes of application may induce different physiological processes, after which plants respond differently to heat treatment. Since these results were obtained with a model plants, further experiments are required to clarify how these changes occur in crop plants, especially in cereals.
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Affiliation(s)
- Tibor Janda
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Magdalena Anna Lejmel
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Anna Borbála Molnár
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Imre Majláth
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Magda Pál
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Quang Trung Nguyen
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, Hanoi City, Vietnam
| | - Ngoc Tung Nguyen
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, Hanoi City, Vietnam
| | - Van Nhan Le
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, Hanoi City, Vietnam
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
| | - Gabriella Szalai
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Martonvásár, Hungary
- * E-mail:
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Fungal Phytohormones: Plant Growth-Regulating Substances and Their Applications in Crop Productivity. Fungal Biol 2020. [DOI: 10.1007/978-3-030-45971-0_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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81
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Behr M, Neutelings G, El Jaziri M, Baucher M. You Want it Sweeter: How Glycosylation Affects Plant Response to Oxidative Stress. FRONTIERS IN PLANT SCIENCE 2020; 11:571399. [PMID: 33042189 PMCID: PMC7525049 DOI: 10.3389/fpls.2020.571399] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 09/01/2020] [Indexed: 05/02/2023]
Abstract
Oxidative stress is a cellular threat which puts at risk the productivity of most of crops valorized by humankind in terms of food, feed, biomaterial, or bioenergy. It is therefore of crucial importance to understand the mechanisms by which plants mitigate the deleterious effects of oxidizing agents. Glycosylation of antioxidant molecules and phytohormones modifies their chemical properties as well as their cellular and histological repartition. This review emphasizes the mechanisms and the outcomes of this conjugation reaction on plant ability to face growing conditions favoring oxidative stress, in mirror with the activity of deglycosylating enzymes. Pioneer evidence bridging flavonoid, glycosylation, and redox homeostasis paved the way for numerous functional analyses of UDP-glycosyltransferases (UGTs), such as the identification of their substrates and their role to circumvent oxidative stress resulting from various environmental challenges. (De)glycosylation appears as a simple chemical reaction regulating the biosynthesis and/or the activity of a myriad of specialized metabolites partaking in response to pathogen and abiotic stresses. This outcome underlies the possibility to valorize UGTs potential to upgrade plant adaptation and fitness in a rising context of sub-optimal growing conditions subsequent to climate change.
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Affiliation(s)
- Marc Behr
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, Gosselies, Belgium
| | - Godfrey Neutelings
- UGSF—Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576, Université de Lille, CNRS, Lille, France
| | - Mondher El Jaziri
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, Gosselies, Belgium
| | - Marie Baucher
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, Gosselies, Belgium
- *Correspondence: Marie Baucher,
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Labudda M, Muszyńska E, Gietler M, Różańska E, Rybarczyk-Płońska A, Fidler J, Prabucka B, Dababat AA. Efficient antioxidant defence systems of spring barley in response to stress induced jointly by the cyst nematode parasitism and cadmium exposure. PLANT AND SOIL 2020; 456:189-206. [PMID: 32952222 PMCID: PMC7487286 DOI: 10.1007/s11104-020-04713-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 09/07/2020] [Indexed: 05/04/2023]
Abstract
AIMS This research aimed to establish how Hordeum vulgare responds to abiotic and biotic stress affecting in tandem. METHODS Plants were inoculated with Heterodera filipjevi and treated with cadmium (Cd) concentration (5 μM) that can occur in the cultivated soil. To verify the hypothesis about participation of increased antioxidative defence in H. vulgare under stress, biochemical and microscopic methods were implemented. RESULTS The amount of superoxide anions and hydrogen peroxide was diminished in plants that were both nematode-inoculated and cadmium-treated. Superoxide anions were rendered harmless by increased activity of superoxide dismutase, and H2O2 was scavenged via Foyer-Halliwell-Asada pathway. The unique enhanced antioxidant capacity of double stressed plants was also linked with the accumulation of S-nitrosoglutathione as nitrosoglutathione reductase activity was inhibited. Furthermore, stimulated activity of arginase in these plants could promote polyamine synthesis and indirectly enhance non-enzymatic antioxidant mechanism. Results indicate that different antioxidants operating together significantly restricted oxidation of lipids and proteins, thus the integrity of cell membranes and protein functions were maintained. CONCLUSIONS The ROS deactivation machinery in barley leaves showed an unusual response during stress induced by H. filipjevi infection and cadmium treatment. Plants could induce a multi-component model of stress response, to detoxify Cd ions and efficiently repair stress damage.
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Affiliation(s)
- Mateusz Labudda
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Ewa Muszyńska
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Marta Gietler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Elżbieta Różańska
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Anna Rybarczyk-Płońska
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Justyna Fidler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Beata Prabucka
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Abdelfattah A. Dababat
- International Maize and Wheat Improvement Center (CIMMYT), Soil Borne Pathogens Program, Ankara, Turkey
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Filgueiras CC, Martins AD, Pereira RV, Willett DS. The Ecology of Salicylic Acid Signaling: Primary, Secondary and Tertiary Effects with Applications in Agriculture. Int J Mol Sci 2019; 20:E5851. [PMID: 31766518 PMCID: PMC6928651 DOI: 10.3390/ijms20235851] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/13/2019] [Accepted: 11/19/2019] [Indexed: 12/19/2022] Open
Abstract
The salicylic acid pathway is one of the primary plant defense pathways, is ubiquitous in vascular plants, and plays a role in rapid adaptions to dynamic abiotic and biotic stress. Its prominence and ubiquity make it uniquely suited for understanding how biochemistry within plants can mediate ecological consequences. Induction of the salicylic acid pathway has primary effects on the plant in which it is induced resulting in genetic, metabolomic, and physiologic changes as the plant adapts to challenges. These primary effects can in turn have secondary consequences for herbivores and pathogens attacking the plant. These secondary effects can both directly influence plant attackers and mediate indirect interactions between herbivores and pathogens. Additionally, stimulation of salicylic acid related defenses can affect natural enemies, predators and parasitoids, which can recruit to plant signals with consequences for herbivore populations and plant herbivory aboveground and belowground. These primary, secondary, and tertiary ecological consequences of salicylic acid signaling hold great promise for application in agricultural systems in developing sustainable high-yielding management practices that adapt to changing abiotic and biotic environments.
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84
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Ibanez F, Suh JH, Wang Y, Stelinski LL. Long-term, sustained feeding by Asian citrus psyllid disrupts salicylic acid homeostasis in sweet orange. BMC PLANT BIOLOGY 2019; 19:493. [PMID: 31718546 PMCID: PMC6852996 DOI: 10.1186/s12870-019-2114-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 10/31/2019] [Indexed: 05/23/2023]
Abstract
BACKGROUND Phloem-feeding insects are known to modulate the salicylic acid (SA) signaling pathway in various plant-insect interaction models. Diaphorina citri is a phloem feeding vector of the deadly phytopathogens, Candidatus Liberibacter americanus and Candidatus Liberibacter asiaticus, and the interactions of D. citri with its host that may modulate plant defenses are not well understood. The objectives of this study were to investigate the molecular mechanisms involved in transcriptional regulation of SA modification and activation of defense-associated responses in sweet orange (Citrus sinensis) exposed to various durations (7-, 14- and 150- days) of continuous feeding by D. citri. RESULTS We quantified expression of genes involved in SA pathway activation and subsequent modification, as well as, associated SA metabolites (SA methyl ester, 2,3-DHBA, and SA 2-O-β-D-glucoside). NPR1 and PR-1 expression was upregulated in plants exposed to continuous feeding by D. citri for 14 days. Expression of BSMT-like, MES1-like and DMR6-like oxygenase, as well as, accumulation of their respective SA metabolites (SA methyl ester, 2,3-DHBA) was significantly higher in plants exposed to continuous feeding by D. citri for 150 days than in those without D. citri infestation. Concomitantly, expression of UGT74F2-like was significantly downregulated and its metabolite, SA 2-β-D-glucoside, was highly accumulated in trees exposed to 150 d of feeding compared to control trees without D. citri. CONCLUSIONS D. citri herbivory differentially regulated transcription and SA-metabolite accumulation in citrus leaves, depending on duration of insect feeding. Our results suggest that prolonged and uninterrupted exposure (150 d) of citrus to D. citri feeding suppressed plant immunity and inhibited growth, which may highlight the importance of vector suppression as part of huanglongbing (HLB) management in citrus.
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Affiliation(s)
- Freddy Ibanez
- Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850 USA
| | - Joon Hyuk Suh
- Department of Food Science and Human Nutrition, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850 USA
| | - Yu Wang
- Department of Food Science and Human Nutrition, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850 USA
| | - Lukasz L. Stelinski
- Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850 USA
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Zheng X, Koopmann B, von Tiedemann A. Role of Salicylic Acid and Components of the Phenylpropanoid Pathway in Basal and Cultivar-Related Resistance of Oilseed Rape ( Brassica napus) to Verticillium longisporum. PLANTS 2019; 8:plants8110491. [PMID: 31717946 PMCID: PMC6918302 DOI: 10.3390/plants8110491] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/29/2019] [Accepted: 11/08/2019] [Indexed: 11/16/2022]
Abstract
Enhanced resistance is a key strategy of controlling 'Verticillium stem striping' in Brassica napus caused by the soil-borne vascular pathogen Verticillium longisporum. The present study analyses the role of a broad range of components in the phenylpropanoid and salicylic acid (SA) pathways in basal and cultivar-related resistance of B. napus towards V. longisporum. A remarkable increase of susceptibility to V. longisporum in SA-deficient transgenic NahG plants indicated an essential role of SA in basal resistance of B. napus to V. longisporum. Accordingly, elevated SA levels were also found in a resistant and not in a susceptible cultivar during early asymptomatic stages of infection (7 dpi), which was associated with increased expression of PR1 and PR2. In later symptomatic stages (14 or 21 dpi), SA responses did not differ anymore between cultivars varying in resistance. In parallel, starting at 7 dpi, an overall increase in phenylpropanoid syntheses developed in the resistant cultivar, including the activity of some key enzymes, phenylalanine ammonium lyase (PAL), cinnamyl alcohol dehydrogenase (CAD) and peroxidase (POX) and the expression of key genes, PAL4, CCoAMT, CCR, POX. As a consequence, a remarkable increase in the levels of phenolic acids (t-cinnamic acid, p-coumaric acid, caffeic acid, ferulic acid, sinapic acid) occurred associated with cultivar resistance. A principal component analysis including all 27 traits studied indicated that component 1 related to SA synthesis (PR1, PR2, POX, level of free SA) and component 2 related to lignin synthesis (level of free ferulic acid, free p-coumaric acid, conjugated t-cinnamic acid) were the strongest factors to determine cultivar-related resistance. This study provides evidence that both SA and phenolic acid synthesis are important in cultivar-related resistance, however, with differential roles during asymptomatic and symptomatic stages of infection.
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Affiliation(s)
- Xiaorong Zheng
- Correspondence: (X.Z.); (A.v.T.); Tel.: +49-(0)551-39-33720 (X.Z.); +49-(0)551-39-23701 (A.v.T.)
| | | | - Andreas von Tiedemann
- Correspondence: (X.Z.); (A.v.T.); Tel.: +49-(0)551-39-33720 (X.Z.); +49-(0)551-39-23701 (A.v.T.)
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Sikder MM, Vestergård M. Impacts of Root Metabolites on Soil Nematodes. FRONTIERS IN PLANT SCIENCE 2019; 10:1792. [PMID: 32082349 PMCID: PMC7005220 DOI: 10.3389/fpls.2019.01792] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/23/2019] [Indexed: 05/20/2023]
Abstract
Plant parasitic nematodes cause significant crop damage globally. Currently, many nematicides have been banned or are being phased out in Europe and other parts of the world because of environmental and human health concerns. Therefore, we need to focus on sustainable and alternative methods of nematode control to protect crops. Plant roots contain and release a wide range of bioactive secondary metabolites, many of which are known defense compounds. Hence, profound understanding of the root mediated interactions between plants and plant parasitic nematodes may contribute to efficient control and management of pest nematodes. In this review, we have compiled literature that documents effects of root metabolites on plant parasitic nematodes. These chemical compounds act as either nematode attractants, repellents, hatching stimulants or inhibitors. We have summarized the few studies that describe how root metabolites regulate the expression of nematode genes. As non-herbivorous nematodes contribute to decomposition, nutrient mineralization, microbial community structuring and control of herbivorous insect larvae, we also review the impact of plant metabolites on these non-target organisms.
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Affiliation(s)
- Md Maniruzzaman Sikder
- Department of Agroecology, AU-Flakkebjerg, Aarhus University, Slagelse, Denmark
- Mycology and Plant Pathology, Department of Botany, Jahangirnagar University, Dhaka, Bangladesh
| | - Mette Vestergård
- Department of Agroecology, AU-Flakkebjerg, Aarhus University, Slagelse, Denmark
- *Correspondence: Mette Vestergård,
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