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Zhu Y, Ma L, Xue H, Li Y, Jiang N. New species of Diaporthe (Diaporthaceae, Diaporthales) from Bauhiniavariegata in China. MycoKeys 2024; 108:317-335. [PMID: 39310741 PMCID: PMC11415621 DOI: 10.3897/mycokeys.108.128983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 08/07/2024] [Indexed: 09/25/2024] Open
Abstract
Diaporthe species are known as endophytes, saprobes and pathogens infecting a wide range of plants and resulting in important crop diseases. In the present study, four strains of Diaporthe were obtained from diseased leaves of Bauhiniavariegata in Guangdong Province, China. Phylogenetic analyses were conducted to identify these strains using five gene regions: internal transcribed spacer (ITS), calmodulin (cal), histone H3 (his3), translation elongation factor 1-α (tef1) and β-tubulin (tub2). The results combined with morphology revealed two new species of Diaporthe named D.bauhiniicola in D.arecae species complex and D.guangzhouensis in D.sojae species complex.
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Affiliation(s)
- Yaquan Zhu
- Key Laboratory of Biodiversity Conservation of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, ChinaEcology and Nature Conservation Institute, Chinese Academy of ForestryBeijingChina
| | - Lei Ma
- Forest Pest Control and Quarantine Station of Tonghua County, Tonghua 134001, ChinaForest Pest Control and Quarantine Station of Tonghua CountyTonghuaChina
| | - Han Xue
- Key Laboratory of Biodiversity Conservation of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, ChinaEcology and Nature Conservation Institute, Chinese Academy of ForestryBeijingChina
| | - Yong Li
- Key Laboratory of Biodiversity Conservation of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, ChinaEcology and Nature Conservation Institute, Chinese Academy of ForestryBeijingChina
| | - Ning Jiang
- Key Laboratory of Biodiversity Conservation of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, ChinaEcology and Nature Conservation Institute, Chinese Academy of ForestryBeijingChina
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Wan Y, Li DW, Si YZ, Li M, Huang L, Zhu LH. Three New Species of Diaporthe Causing Leaf Blight on Acer palmatum in China. PLANT DISEASE 2023; 107:849-860. [PMID: 35961016 DOI: 10.1094/pdis-06-22-1475-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Diaporthe spp. are often reported as plant pathogens, endophytes, and saprobes. In this study, three new species (Diaporthe foliicola, D. monospora, and D. nanjingensis) on Acer palmatum were described and illustrated based on morphological characteristics and phylogenetic analyses. Phylogenetic relationships of the new species were determined by multilocus phylogenetic analyses based on partial sequences of the internal transcribed spacer (ITS) region, translation elongation factor 1-α (TEF), β-tubulin (TUB), histone H3 (HIS), and calmodulin (CAL) genes. Genealogical concordance phylogenetic species recognition with a pairwise homoplasy index test was used to verify the conclusions of the phylogenetic analyses. All species were illustrated and their morphology and phylogenetic relationships with other related Diaporthe spp. are discussed. In addition, the tests of Koch's postulates showed that the three new species were pathogens causing leaf blight on A. palmatum.
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Affiliation(s)
- Yu Wan
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - De-Wei Li
- The Connecticut Agricultural Experiment Station Valley Laboratory, Windsor, CT 06095, U.S.A
| | - Yuan-Zhi Si
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Min Li
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Lin Huang
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Li-Hua Zhu
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
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Zhu YQ, Ma CY, Xue H, Piao CG, Li Y, Jiang N. Two new species of Diaporthe (Diaporthaceae, Diaporthales) in China. MycoKeys 2023; 95:209-228. [DOI: 10.3897/mycokeys.95.98969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 02/17/2023] [Indexed: 03/05/2023] Open
Abstract
Species of Diaporthe have been reported as plant endophytes, pathogens and saprobes on a wide range of plant hosts. Strains of Diaporthe were isolated from leaf spots of Smilax glabra and dead culms of Xanthium strumarium in China, and identified based on morphology and molecular phylogenetic analyses of combined internal transcribed spacer region (ITS), calmodulin (cal), histone H3 (his3), translation elongation factor 1-alpha (tef1) and β-tubulin (tub2) loci. As a result, two new species named Diaporthe rizhaoensis and D. smilacicola are identified, described and illustrated in the present study.
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The genome of a Far Eastern isolate of Diaporthe caulivora, a soybean fungal pathogen. Appl Microbiol Biotechnol 2023; 107:1311-1327. [PMID: 36650392 DOI: 10.1007/s00253-023-12370-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/26/2022] [Accepted: 12/31/2022] [Indexed: 01/19/2023]
Abstract
Diaporthe caulivora is an economically important fungal pathogen and a causal agent of soybean stem canker and seed decay. Here, the genome of a Russian Far Eastern isolate of D. caulivora was sequenced, assembled, and announced. Assembly quality was enough for advanced annotation, including prediction of potential disease-related genes encoding virulence factors and molecular determinants contributing to pathogen-host selection, interactions, and adaptation. Comparative analysis of 15 Diaporthe species was conducted regarding general genome properties, collinearity, and proteomes, and included detailed investigation of interspersed repeats. A notable feature of this analysis is a high recombinant variability of Diaporthe genomes, determined by the number and distribution of interspersed repeats, which also proved to be responsible for the diversity of GC content and genome size. This variability is assumed the main determinant of the divergence of Diaporthe genomes. A Bayesian multi-gene phylogeny was inferred for the 15 Diaporthe species on the basis of twenty thousand polymorphic sites of > 100 orthologous genes using independently adjusted evolutionary models. This allowed for the most accurate determination of evolutionary relationships and species boundaries for effective reporting about these plant pathogens. The evidence, obtained by different genome analysis techniques, implies the host-independent evolution of Diaporthe species. KEY POINTS: • The genome of a Far Eastern isolate of D. caulivora was announced. • A high degree of recombinant variability determines genomic divergence in Diaporthe genus. • The multi-gene phylogeny implies host-independent evolution of Diaporthe species.
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Guarnaccia V, Hand FP, Garibaldi A, Gullino ML. Bedding Plant Production and the Challenge of Fungal Diseases. PLANT DISEASE 2021; 105:1241-1258. [PMID: 33135987 DOI: 10.1094/pdis-09-20-1955-fe] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bedding plants are a major group of ornamentals produced in greenhouses or nurseries worldwide and planted outdoors. Their economic importance has increased continuously in the last four decades in both the United States and the European Union. These plants are subject to a broad number of diseases that can negatively impact their production and cultivation. The initial steps of production strongly influence the health status of these plants and, consequently, their aesthetic appeal, which is a strong requisite for consumers. Seeds, cuttings, and other forms of propagative material, along with production systems and growing media, can influence the phytosanitary status of the final product. In this article, case studies of soilborne and foliar diseases are presented together with preventive measures to achieve innovative disease management strategies. Quarantine restrictions and eradication measures are also discussed, in consideration of the high likelihood for ornamental plants to be long-distance vectors of new pathogens and pests.
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Affiliation(s)
- Vladimiro Guarnaccia
- Centre for Innovation in the Agro-Environmental Sector, AGROINNOVA, University of Torino, Largo Braccini 2, 10095 Grugliasco (TO), Italy
- Department of Agricultural, Forest and Food Sciences (DISAFA), University of Torino, Largo Braccini 2, 10095 Grugliasco (TO), Italy
| | | | - Angelo Garibaldi
- Centre for Innovation in the Agro-Environmental Sector, AGROINNOVA, University of Torino, Largo Braccini 2, 10095 Grugliasco (TO), Italy
| | - M Lodovica Gullino
- Centre for Innovation in the Agro-Environmental Sector, AGROINNOVA, University of Torino, Largo Braccini 2, 10095 Grugliasco (TO), Italy
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Arciuolo R, Santos C, Soares C, Castello G, Spigolon N, Chiusa G, Lima N, Battilani P. Molecular Characterization of Diaporthe Species Associated With Hazelnut Defects. FRONTIERS IN PLANT SCIENCE 2020; 11:611655. [PMID: 33362837 PMCID: PMC7759530 DOI: 10.3389/fpls.2020.611655] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 11/16/2020] [Indexed: 05/13/2023]
Abstract
Fungi of the genus Diaporthe have been reported as the main causative agent of hazelnut defects in the Caucasus area. This study aimed to define which fungal species are present in defective hazelnuts grown in Turkey and confirm the role of Diaporthe spp. Seven hazelnut orchards were selected, with each one located in a different Turkish Province (Düzce, Giresun, Ordu, Samsun, Sakarya, Trabzon, and Zonguldak), and hazelnuts were collected at early and full ripening. Fungal isolation and identification were performed at the genus level based on morphological characteristics. Several genera were isolated, with Diaporthe spp. being among the prevalent. This was the only genus with increasing incidence from early to full ripening, and incidence at full ripening was positively correlated both with internal (ρ = 0.86) and visible defects (ρ = 0.81), which confirmed its role as the key causative agent of hazelnut defects. The correlation of defect occurrence with rainfall, reported in previous study, was not confirmed, possibly due to the low defect incidence. A total of 86 Diaporthe monosporic strains isolated from Turkish hazelnut samples, together with 33 strains collected in the Caucasus region and 6 from Italy, were analyzed with a multi-locus phylogeny based on three genomic loci (ITS, EF1-α, and tub). The results showed that Diaporthe strains can be grouped into 7 distinct clades, with a majority of Turkish strains (95%) being placed into a single clade related with D. eres. These samples were organized into several sub-clades, which indicates the existence of genetically diverse sub-populations.
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Affiliation(s)
- Roberta Arciuolo
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Carla Santos
- CEB – Centre of Biological Engineering, Micoteca da Universidade do Minho, University of Minho, Braga, Portugal
| | - Célia Soares
- CEB – Centre of Biological Engineering, Micoteca da Universidade do Minho, University of Minho, Braga, Portugal
| | | | | | - Giorgio Chiusa
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Nelson Lima
- CEB – Centre of Biological Engineering, Micoteca da Universidade do Minho, University of Minho, Braga, Portugal
| | - Paola Battilani
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
- *Correspondence: Paola Battilani,
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Song XY, Wang H, Ren F, Wang K, Dou G, Lv X, Yan DH, Strobel G. An Endophytic Diaporthe apiculatum Produces Monoterpenes with Inhibitory Activity against Phytopathogenic Fungi. Antibiotics (Basel) 2019; 8:E231. [PMID: 31766670 PMCID: PMC6963576 DOI: 10.3390/antibiotics8040231] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/05/2019] [Accepted: 11/13/2019] [Indexed: 11/24/2022] Open
Abstract
Volatile organic compounds (VOCs) from endophytic fungi are becoming a potential antibiotic resource. The inhibitive effects of VOCs produced by an endophytic fungus in Leucaena leucocephala were investigated on plant pathogens in this study. Using standard morphological methods and multigene phylogeny, the fungus was identified as Diaporthe apiculatum strain FPYF 3052. Utilizing a two- compartment Petri plate bioassay method, the VOCs from this fungus showed bioactivity ranging from 23.8% to 66.7% inhibition on eight plant pathogens within 24 hours. The SPME-GC/MS technique identified fifteen volatile compounds with dominant terpenoids γ-terpinene (39.8%), α-terpinene (17.2%), and (-)-4-terpineol (8.4%) from the VOCs. Commercial α-terpinene, γ-terpinene, and (-)-4-terpineol demonstrated inhibition on the tested pathogens at concentrations from 0.2 to 1.0 µl/ml within 72 h in the bioassay system. The inhibition rates were from 28% to 100% percent using 1.0 µl/ml within 48 h. (-)-4-Terpineol was the most active of the terpenoids causing up to 100% inhibition. The data illustrate that these monoterpenes play an important role in the inhibitive bioactivity of the VOCs of D. apiculatum FPYF 3052. Most importantly, (-)-4-terpineol is now for the first time, reported to have capability of strong antifungal activity and could be developed as an antibiotic substance.
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Affiliation(s)
- Xiao-Yu Song
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Open Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China; (X.-Y.S.); (G.D.); (X.L.)
| | - Huihua Wang
- Department of Food and Biological Engineering, Beijing Vocational College of Agriculture, Beijing 102442, China;
| | - Fei Ren
- Experimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, China;
| | - Kaiying Wang
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Open Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China; (X.-Y.S.); (G.D.); (X.L.)
| | - Guiming Dou
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Open Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China; (X.-Y.S.); (G.D.); (X.L.)
| | - Xing Lv
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Open Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China; (X.-Y.S.); (G.D.); (X.L.)
| | - Dong-Hui Yan
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Open Laboratory of Forest Protection of National Forestry and Grassland Administration, Beijing 100091, China; (X.-Y.S.); (G.D.); (X.L.)
| | - Gary Strobel
- Department of Plant Sciences, Montana State University, Bozeman, MT 59717, USA;
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Udayanga D, Liu X, Crous PW, McKenzie EHC, Chukeatirote E, Hyde KD. A multi-locus phylogenetic evaluation of Diaporthe (Phomopsis). FUNGAL DIVERS 2012. [DOI: 10.1007/s13225-012-0190-9] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Wikee S, Udayanga D, Crous PW, Chukeatirote E, McKenzie EHC, Bahkali AH, Dai D, Hyde KD. Phyllosticta—an overview of current status of species recognition. FUNGAL DIVERS 2011. [DOI: 10.1007/s13225-011-0146-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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The genus Phomopsis: biology, applications, species concepts and names of common phytopathogens. FUNGAL DIVERS 2011. [DOI: 10.1007/s13225-011-0126-9] [Citation(s) in RCA: 245] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Wet J, Slippers B, Preisig O, Wingfield BD, Tsopelas P, Wingfield MJ. Molecular and morphological characterization of Dothiorella casuarini sp. nov. and other Botryosphaeriaceae with diplodia-like conidia. Mycologia 2009; 101:503-11. [PMID: 19623930 DOI: 10.3852/07-180] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
After recent changes to the taxonomy of the Botryosphaeriaceae species with diplodia-like (= dark, ovoid, often pigmented) conidia are considered to belong to at least three genera including Diplodia, Lasiodiplodia and Dothiorella. In a recent molecular phylogenetic study it became apparent that two groups of isolates with diplodia-like conidia required taxonomic revision. One group of isolates originated from Cupressus sempervirens in Greece and Cyprus and had been identified as D. pinea f. sp. cupressi based on morphological characteristics. The other isolates originated from a Casuarina sp. in Australia and were superficially similar to those in the first group based on their morphologically similar diplodia-like conidia. The aim of this study was to resolve the taxonomy of these two groups of isolates by combining the information from the multiple gene genealogies with morphological characters. The results showed that the isolates from C. sempervirens in Greece and Cyprus represent D. cupressi. The isolates from Casuarina in Australia belong to the more distantly related genus Dothiorella and represent a distinct species that is described here as Do. casuarini sp. nov.
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Affiliation(s)
- Juanita de Wet
- Forestry and Agricultural Biotechnology Institute, Department of Microbiology and Plant Pathology, University of Pretoria, Pretoria 0002, South Africa.
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Species diversity and drivers of spread of alien fungi (sensu lato) in Europe with a particular focus on France. Biol Invasions 2009. [DOI: 10.1007/s10530-009-9439-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Vujanovic V, Hamelin RC, Bernier L, Vujanovic G, St-Arnaud M. Fungal diversity, dominance, and community structure in the rhizosphere of clonal Picea mariana plants throughout nursery production chronosequences. MICROBIAL ECOLOGY 2007; 54:672-84. [PMID: 17347891 DOI: 10.1007/s00248-007-9226-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Revised: 01/29/2007] [Accepted: 02/04/2007] [Indexed: 05/14/2023]
Abstract
Fungal diversity in the rhizosphere of healthy and diseased clonal black spruce (Picea mariana) plants was analyzed with regard to nursery production chronosequences. The four key production stages were sampled: mother plants (MP), 8-week-old cuttings (B + 0), second-year cuttings (B + 1), and third-year cuttings (B + 2). A total of 45 fungal taxa were isolated and identified based on cultural, phenotypic, and molecular characters. Members of phylum Ascomycota dominated, followed by Basidiomycota and Zygomycota. Diagnosis characters and distance analysis of the internal transcribed spacer rDNA sequences allowed the identification of 39 ascomycetous taxa. Many belong to the order Hypocreales, families Hypocreaceae and Nectriaceae, which contain many clusters of potentially pathogenic taxa (Cylindrocladium, Fusarium, and Neonectria) and are also ecologically associated with antagonistic taxa (Chaetomium, Hypocrea, Microsphaeropsis, Penicillium, Paecilomyces, Verticillium, Trichoderma, and Sporothrix). This is also the first report of a Cylindrocladium canadense association with disease symptoms and relation with Pestalotiopsis, Fusarium, Exserochilum, Rhizoctonia, and Xenochalara fungal consortia. Both production chronosequence and plant health considerably influenced fungal taxa assemblages. Unweighted pair-group arithmetic average clustering showed that isolates from MP, B + 0, and B + 1 plant rhizospheres clustered together within healthy or diseased health classes, whereas isolates from healthy and diseased B + 2 plants clustered together. Canonical correspondence analysis revealed substantial alteration in community assemblages with regard to plant health and yielded a principal axis direction that regrouped taxa associated with diseased plant rhizosphere soil, whereas the opposite axis direction was associated with healthy plants. Two diversity indices were defined and applied to assess the fungal taxa contribution (Tc) and persistence (Pi) throughout the production.
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Affiliation(s)
- V Vujanovic
- Institut de recherche en biologie végétale, Université de Montréal & Jardin botanique de Montréal, 4101 Sherbrooke street east, Montreal, Quebec, H1X 2B2, Canada
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