1
|
Xiao WN, Nunn GM, Fufeng AB, Belu N, Brookman RK, Halim A, Krysmanski EC, Cameron RK. Exploring Pseudomonas syringae pv. tomato biofilm-like aggregate formation in susceptible and PTI-responding Arabidopsis thaliana. MOLECULAR PLANT PATHOLOGY 2024; 25:e13403. [PMID: 37988240 PMCID: PMC10799205 DOI: 10.1111/mpp.13403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 10/06/2023] [Indexed: 11/23/2023]
Abstract
Bacterial biofilm-like aggregates have been observed in plants, but their role in pathogenicity is underinvestigated. In the present study, we observed that extracellular DNA and polysaccharides colocalized with green fluorescent protein (GFP)-expressing Pseudomonas syringae pv. tomato (Pst) aggregates in Arabidopsis leaves, suggesting that Pst aggregates are biofilms. GFP-expressing Pst, Pst ΔalgU ΔmucAB (Pst algU mutant), and Pst ΔalgD ΔalgU ΔmucAB (Pst algU algD mutant) were examined to explore the roles of (1) alginate, a potential biofilm component; (2) Pst AlgU, thought to regulate alginate biosynthesis and some type III secretion system effector genes; and (3) intercellular salicylic acid (SA) accumulation during pathogen-associated molecular pattern-triggered immunity (PTI). Pst formed extensive aggregates in susceptible plants, whereas aggregate numbers and size were reduced in Pst algU and Pst algD algU mutants, and both multiplied poorly in planta, suggesting that aggregate formation contributes to Pst success in planta. However, in SA-deficient sid2-2 plants, Pst algD algU mutant multiplication and aggregate formation were partially restored, suggesting plant-produced SA contributes to suppression of Pst aggregate formation. Pst algD algU mutants formed fewer and smaller aggregates than Pst algU mutants, suggesting both AlgU and AlgD contribute to Pst aggregate formation. Col-0 plants accumulated low levels of SA in response to Pst and both mutants (Pst algU and Pst algD algU), suggesting the regulatory functions of AlgU are not involved in suppressing SA-mediated plant defence. Plant PTI was associated with highly reduced Pst aggregate formation and accumulation of intercellular SA in flg22-induced PTI-responding wild-type Col-0, but not in PTI-incompetent fls2, suggesting intercellular SA accumulation by Arabidopsis contributes to suppression of Pst biofilm-like aggregate formation during PTI.
Collapse
Affiliation(s)
- Wantao N. Xiao
- Department of BiologyMcMaster UniversityHamiltonOntarioCanada
| | - Garrett M. Nunn
- Department of BiologyMcMaster UniversityHamiltonOntarioCanada
| | | | - Natalie Belu
- Department of BiologyMcMaster UniversityHamiltonOntarioCanada
| | | | - Abdul Halim
- Department of BiologyMcMaster UniversityHamiltonOntarioCanada
| | | | | |
Collapse
|
2
|
Khamis WM, Behiry SI, Marey SA, Al-Askar AA, Amer G, Heflish AA, Su Y, Abdelkhalek A, Gaber MK. Phytochemical analysis and insight into insecticidal and antifungal activities of Indian hawthorn leaf extract. Sci Rep 2023; 13:17194. [PMID: 37821483 PMCID: PMC10567697 DOI: 10.1038/s41598-023-43749-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 09/27/2023] [Indexed: 10/13/2023] Open
Abstract
Fungicides or insecticides are popular means of controlling a variety of pathogens and insect pests; however, they can cause harmful effects on both human health and the environment. Different researchers have suggested using plant extracts, which have shown promise in managing fungi and insects. The purpose of this investigation was to explore the antifungal activities of an acetone extract made from the leaves of Indian Hawthorn (HAL) against phytopathogens that are known to harm maize crops, Fusarium verticillioides (OQ820154) and Rhizoctonia solani (OQ820155), and to evaluate the insecticidal property against Aphis gossypii Glover aphid. The HAL extract demonstrated significant antifungal activity against the two fungal pathogens tested, especially at the high dose of 2000 µg/mL. Laboratory tests on the LC20 of HAL extract (61.08 mg/L) versus buprofezin 25% WP (0.0051 mg/L) were achieved on A. gossypii Glover. HAL extract diminished the nymph's production over 72 h and their total reproductive rate. This extract was like buprofezin 25% WP in decreasing the daily reproductive rate, reproductive period, and mean survival percentage. Nevertheless, the newly-born nymphs of treated females with HAL extract attained the highest reduction in survival percentage at 46.00%. Equalized prolongations on the longevity of nymphs to 9.33, 8.33, and 7 days and the total life cycle to 15.00, 14.00, and 12.67 days were realized by HAL extract, buprofezin 25% WP, and the control, respectively. The olfactory choice test on the aphids showed the minimum attraction rate to HAL extract. The HPLC of HAL extract comprised an abundance of phenolic compounds (ferulic acid, gallic acid, 4-hydroxybenzoic acid, salicylic acid, ellagic acid, and pyrogallol), and the concentrations of these compounds vary widely, with salicylic acid being the most concentrated at 25.14 mg/mL. Among the flavonoids, epicatechin has the highest concentration at 11.69 mg/mL. The HAL extract GC-MS consists of various organic compounds, including sesquiterpenes, cyclopropenes, fatty acids, steroids, alcohols, ketones, esters, bufadienolides, opioids, and other organic compounds. The most abundant compounds in the sample are n-hexadecanoic acid (12.17%), followed by 5α, 7αH, 10α-eudesm-11-en-1α-ol (9.43%), and cis-13-octadecenoic acid (5.87%). Based on the findings, it can be inferred that the HAL extract may be a viable option for plants to combat both fungal and insect infestations. This presents an encouraging prospect for utilizing a natural and sustainable approach toward long-term pest management in plants.
Collapse
Affiliation(s)
- Wael M Khamis
- Plant Protection Research Institute, Agriculture Research Center, Al-Sabhia, Alexandria, 21616, Egypt
| | - Said I Behiry
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, 21531, Egypt.
| | - Samy A Marey
- King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Abdulaziz A Al-Askar
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Ghoname Amer
- Plant Pathology Department, Faculty of Agriculture, Damanhour University, Damanhour, 22516, Egypt
| | - Ahmed A Heflish
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, 21531, Egypt
| | - Yiming Su
- Utah Water Research Laboratory, Department of Civil and Environmental Engineering, Utah State University, Logan, UT, 84341, USA
| | - Ahmed Abdelkhalek
- Plant Protection and Biomolecular Diagnosis Department, ALCRI, City of Scientific Research and Technological Applications, New Borg El Arab City, 21934, Alexandria, Egypt.
| | - Mohamed K Gaber
- Plant Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, 21531, Egypt
| |
Collapse
|
3
|
Genome Resequencing and Transcriptome Analysis Reveal the Genetic Diversity of Wolfiporia cocos Germplasm and Genes Related to High Yield. Curr Microbiol 2022; 79:312. [DOI: 10.1007/s00284-022-03011-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 08/26/2022] [Indexed: 11/03/2022]
|
4
|
Georgiou CD, Zervoudakis G, Petropoulou KP. Ascorbic acid might play a role in the sclerotial differentiation ofSclerotium rolfsii. Mycologia 2017. [DOI: 10.1080/15572536.2004.11833115] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | - Katerine P. Petropoulou
- Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26100—Patra, Greece
| |
Collapse
|
5
|
Pontin M, Bottini R, Burba JL, Piccoli P. Allium sativum produces terpenes with fungistatic properties in response to infection with Sclerotium cepivorum. PHYTOCHEMISTRY 2015; 115:152-60. [PMID: 25819001 DOI: 10.1016/j.phytochem.2015.02.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 12/11/2014] [Accepted: 02/04/2015] [Indexed: 05/28/2023]
Abstract
This study investigated terpene biosynthesis in different tissues (root, protobulb, leaf sheath and blade) of in vitro-grown garlic plants either infected or not (control) with Sclerotium cepivorum, the causative agent of Allium White Rot disease. The terpenes identified by gas chromatography-electron impact mass spectrometry (GC-EIMS) in infected plants were nerolidol, phytol, squalene, α-pinene, terpinolene, limonene, 1,8-cineole and γ-terpinene, whose levels significantly increased when exposed to the fungus. Consistent with this, an increase in terpene synthase (TPS) activity was measured in infected plants. Among the terpenes identified, nerolidol, α-pinene and terpinolene were the most abundant with antifungal activity against S. cepivorum being assessed in vitro by mycelium growth inhibition. Nerolidol and terpinolene significantly reduced sclerotia production, while α-pinene stimulated it in a concentration-dependent manner. Parallel to fungal growth inhibition, electron microscopy observations established morphological alterations in the hyphae exposed to terpinolene and nerolidol. Differences in hyphal EtBr uptake suggested that one of the antifungal mechanisms of nerolidol and terpinolene might be disruption of fungal membrane integrity.
Collapse
Affiliation(s)
- Mariela Pontin
- Estación Experimental Agropecuaria La Consulta-Instituto Nacional de Tecnología Agropecuaria, CC8, 5567 La Consulta, Mendoza, Argentina; Laboratorio de Bioquímica Vegetal, Instituto de Biología Agrícola de Mendoza, Consejo Nacional de Investigaciones Científicas y Tecnológicas-Universidad Nacional de Cuyo, Almirante Brown 500, M5528AHB Chacras de Coria, Mendoza, Argentina.
| | - Rubén Bottini
- Laboratorio de Bioquímica Vegetal, Instituto de Biología Agrícola de Mendoza, Consejo Nacional de Investigaciones Científicas y Tecnológicas-Universidad Nacional de Cuyo, Almirante Brown 500, M5528AHB Chacras de Coria, Mendoza, Argentina.
| | - José Luis Burba
- Estación Experimental Agropecuaria La Consulta-Instituto Nacional de Tecnología Agropecuaria, CC8, 5567 La Consulta, Mendoza, Argentina.
| | - Patricia Piccoli
- Laboratorio de Bioquímica Vegetal, Instituto de Biología Agrícola de Mendoza, Consejo Nacional de Investigaciones Científicas y Tecnológicas-Universidad Nacional de Cuyo, Almirante Brown 500, M5528AHB Chacras de Coria, Mendoza, Argentina.
| |
Collapse
|
6
|
Panahirad S, Zaare-Nahandi F, Safaralizadeh R, Alizadeh-Salteh S. Postharvest Control of Rhizopus stolonifer
in Peach (Prunus persica
L. Batsch) Fruits Using Salicylic Acid. J Food Saf 2012. [DOI: 10.1111/jfs.12013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Sima Panahirad
- Department of Horticultural Sciences; Faculty of Agriculture; University of Tabriz; Tabriz 5166616471 Iran
| | - Fariborz Zaare-Nahandi
- Department of Horticultural Sciences; Faculty of Agriculture; University of Tabriz; Tabriz 5166616471 Iran
| | - Razieh Safaralizadeh
- Department of Horticultural Sciences; Faculty of Agriculture; University of Tabriz; Tabriz 5166616471 Iran
| | - Saeedeh Alizadeh-Salteh
- Department of Horticultural Sciences; Faculty of Agriculture; University of Tabriz; Tabriz 5166616471 Iran
| |
Collapse
|
7
|
Neurospora crassa Light Signal Transduction Is Affected by ROS. JOURNAL OF SIGNAL TRANSDUCTION 2011; 2012:791963. [PMID: 22046507 PMCID: PMC3199206 DOI: 10.1155/2012/791963] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 06/23/2011] [Indexed: 11/17/2022]
Abstract
In the ascomycete fungus Neurospora crassa blue-violet light controls the expression of genes responsible for differentiation of reproductive structures, synthesis of secondary metabolites, and the circadian oscillator activity. A major photoreceptor in Neurospora cells is WCC, a heterodimeric complex formed by the PAS-domain-containing polypeptides WC-1 and WC-2, the products of genes white collar-1 and white collar-2. The photosignal transduction is started by photochemical activity of an excited FAD molecule noncovalently bound by the LOV domain (a specialized variant of the PAS domain). The presence of zinc fingers (the GATA-recognizing sequences) in both WC-1 and WC-2 proteins suggests that they might function as transcription factors. However, a critical analysis of the phototransduction mechanism considers the existence of residual light responses upon absence of WCC or its homologs in fungi. The data presented
point at endogenous ROS generated by a photon stimulus as an alternative input to pass on light signals to downstream targets.
Collapse
|
8
|
Forchetti G, Masciarelli O, Izaguirre MJ, Alemano S, Alvarez D, Abdala G. Endophytic Bacteria Improve Seedling Growth of Sunflower Under Water Stress, Produce Salicylic Acid, and Inhibit Growth of Pathogenic Fungi. Curr Microbiol 2010; 61:485-93. [DOI: 10.1007/s00284-010-9642-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2009] [Accepted: 03/26/2010] [Indexed: 10/19/2022]
|
9
|
Patsoukis N, Georgiou DC. Thiol redox state and related enzymes in sclerotium-forming filamentous phytopathogenic fungi. ACTA ACUST UNITED AC 2007; 112:602-10. [PMID: 18400483 DOI: 10.1016/j.mycres.2007.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Revised: 08/10/2007] [Accepted: 10/24/2007] [Indexed: 10/22/2022]
Abstract
Thiol redox state (TRS) reduced and oxidized components form profiles characteristic of each of the four main types of differentiation in the sclerotiogenic phytopathogenic fungi: loose, terminal, lateral-chained, and lateral-simple, represented by Rhizoctonia solani, Sclerotinia sclerotiorum, Sclerotium rolfsii, and Sclerotinia minor, respectively. A common feature of these fungi is that as their undifferentiated mycelium enters the differentiated state, it is accompanied by a decrease in the low oxidative stress-associated total reduced thiols and/or by an increase of the high oxidative stress-associated total oxidized thiols either in the sclerotial mycelial substrate or in its corresponding sclerotium, indicating a relationship between TRS-related oxidative stress and sclerotial differentiation. Moreover, the four studied sclerotium types exhibit high activities of TRS-related antioxidant enzymes, indicating the existence of antioxidant protection of the hyphae of the sclerotium medulla until conditions become appropriate for sclerotium germination.
Collapse
|
10
|
Zervoudakis G, Tairis N, Salahas G, Georgiou CD. Beta-carotene production and sclerotial differentiation in Sclerotinia minor. MYCOLOGICAL RESEARCH 2003; 107:624-31. [PMID: 12884961 DOI: 10.1017/s0953756203007822] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sclerotinia minor accumulates beta-carotene at levels dependent upon oxidative growth conditions and differentiation. Beta-carotene accumulation is 2.5-fold higher in differentiated mycelia at high than at low oxidative stress, and approx. 3-fold higher in differentiated than in undifferentiated mycelia. It is proposed that beta-carotene may be produced by the fungus to counteract oxidative stress that develops during growth. This is shown by the finding that exogenous beta-carotene at growth non-inhibiting concentrations causes a concentration-dependent reduction of oxidative stress (lipid and protein peroxidation) and sclerotial differentiation in this fungus. The data of this study support our hypothesis that sclerotial differentiation in phytopathogenic fungi may be induced by oxidative stress.
Collapse
Affiliation(s)
- George Zervoudakis
- Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26100 Patra, Greece
| | | | | | | |
Collapse
|
11
|
Role of erythroascorbate and ascorbate in sclerotial differentiation in Sclerotinia sclerotiorum. ACTA ACUST UNITED AC 2001. [DOI: 10.1017/s095375620100497x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
Georgiou CD, Zervoudakis G, Tairis N, Kornaros M. beta-Carotene production and its role in sclerotial differentiation of Sclerotium rolfsii. Fungal Genet Biol 2001; 34:11-20. [PMID: 11567548 DOI: 10.1006/fgbi.2001.1285] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The fungus Sclerotium rolfsii produces beta-carotene, the main detected carotenoid, in levels dependent upon oxidative growth conditions and upon differentiation. beta-Carotene accumulation is 5-, 6.5-, and 6.7-fold higher in undifferentiated mycelia, sclerotia, and differentiated mycelia, respectively, at high than at low oxidative stress. It accumulates more in older than in younger mycelia and is 2-fold higher in differentiated than in undifferentiated mycelia. We propose that beta-carotene is formed possibly to help the fungus reduce oxidative stress that develops during growth. This is supported by the finding that exogenous beta-carotene at non-growth-inhibiting concentrations causes a concentration-dependent reduction of oxidative stress (lipid peroxidation) of undifferentiated mycelia, which results in an equally proportional reduction of sclerotial differentiation. The data of this study support our hypothesis that sclerotial differentiation is induced by oxidative stress.
Collapse
Affiliation(s)
- C D Georgiou
- Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, Patra 26100, Greece.
| | | | | | | |
Collapse
|