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Lata-Tenesaca LF, Oliveira MJB, Barros AV, Picanço BBM, Rodrigues FÁ. Physiological and Biochemical Aspects of Silicon-Mediated Resistance in Maize against Maydis Leaf Blight. PLANTS (BASEL, SWITZERLAND) 2024; 13:531. [PMID: 38498536 PMCID: PMC10893398 DOI: 10.3390/plants13040531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/26/2024] [Accepted: 02/13/2024] [Indexed: 03/20/2024]
Abstract
Maydis leaf blight (MLB), caused by the necrotrophic fungus Bipolaris maydis, has caused considerable yield losses in maize production. The hypothesis that maize plants with higher foliar silicon (Si) concentration can be more resistant against MLB was investigated in this study. This goal was achieved through an in-depth analysis of the photosynthetic apparatus (parameters of leaf gas exchange chlorophyll (Chl) a fluorescence and photosynthetic pigments) changes in activities of defense and antioxidative enzymes in leaves of maize plants with (+Si; 2 mM) and without (-Si; 0 mM) Si supplied, as well as challenged and not with B. maydis. The +Si plants showed reduced MLB symptoms (smaller lesions and lower disease severity) due to higher foliar Si concentration and less production of malondialdehyde, hydrogen peroxide, and radical anion superoxide compared to -Si plants. Higher values for leaf gas exchange (rate of net CO2 assimilation, stomatal conductance to water vapor, and transpiration rate) and Chl a fluorescence (variable-to-maximum Chl a fluorescence ratio, photochemical yield, and yield for dissipation by downregulation) parameters along with preserved pool of chlorophyll a+b and carotenoids were noticed for infected +Si plants compared to infected -Si plants. Activities of defense (chitinase, β-1,3-glucanase, phenylalanine ammonia-lyase, polyphenoloxidase, peroxidase, and lipoxygenase) and antioxidative (ascorbate peroxidase, catalase, superoxide dismutase, and glutathione reductase) enzymes were higher for infected +Si plants compared to infected -Si plants. Collectively, this study highlights the importance of using Si to boost maize resistance against MLB considering the more operative defense reactions and the robustness of the antioxidative metabolism of plants along with the preservation of their photosynthetic apparatus.
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Affiliation(s)
| | | | | | | | - Fabrício Ávila Rodrigues
- Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Universidade Federal de Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (L.F.L.-T.); (M.J.B.O.); (A.V.B.); (B.B.M.P.)
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Biju S, Fuentes S, Gupta D. Novel insights into the mechanism(s) of silicon-induced drought stress tolerance in lentil plants revealed by RNA sequencing analysis. BMC PLANT BIOLOGY 2023; 23:498. [PMID: 37848813 PMCID: PMC10580624 DOI: 10.1186/s12870-023-04492-5] [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: 05/07/2023] [Accepted: 09/27/2023] [Indexed: 10/19/2023]
Abstract
BACKGROUND Lentil is an essential cool-season food legume that offers several benefits in human nutrition and cropping systems. Drought stress is the major environmental constraint affecting lentil plants' growth and productivity by altering various morphological, physiological, and biochemical traits. Our previous research provided physiological and biochemical evidence showing the role of silicon (Si) in alleviating drought stress in lentil plants, while the molecular mechanisms are still unidentified. Understanding the molecular mechanisms of Si-mediated drought stress tolerance can provide fundamental information to enhance our knowledge of essential gene functions and pathways modulated by Si during drought stress in plants. Thus, the present study compared the transcriptomic characteristics of two lentil genotypes (drought tolerant-ILL6002; drought sensitive-ILL7537) under drought stress and investigated the gene expression in response to Si supplementation using high-throughput RNA sequencing. RESULTS This study identified 7164 and 5576 differentially expressed genes (DEGs) from drought-stressed lentil genotypes (ILL 6002 and ILL 7537, respectively), with Si treatment. RNA sequencing results showed that Si supplementation could alter the expression of genes related to photosynthesis, osmoprotection, antioxidant systems and signal transduction in both genotypes under drought stress. Furthermore, these DEGs from both genotypes were found to be associated with the metabolism of carbohydrates, lipids and proteins. The identified DEGs were also linked to cell wall biosynthesis and vasculature development. Results suggested that Si modulated the dynamics of biosynthesis of alkaloids and flavonoids and their metabolism in drought-stressed lentil genotypes. Drought-recovery-related DEGs identified from both genotypes validated the role of Si as a drought stress alleviator. This study identified different possible defense-related responses mediated by Si in response to drought stress in lentil plants including cellular redox homeostasis by reactive oxygen species (ROS), cell wall reinforcement by the deposition of cellulose, lignin, xyloglucan, chitin and xylan, secondary metabolites production, osmotic adjustment and stomatal closure. CONCLUSION Overall, the results suggested that a coordinated interplay between various metabolic pathways is required for Si to induce drought tolerance. This study identified potential genes and different defence mechanisms involved in Si-induced drought stress tolerance in lentil plants. Si supplementation altered various metabolic functions like photosynthesis, antioxidant defence system, osmotic balance, hormonal biosynthesis, signalling, amino acid biosynthesis and metabolism of carbohydrates and lipids under drought stress. These novel findings validated the role of Si in drought stress mitigation and have also provided an opportunity to enhance our understanding at the genomic level of Si's role in alleviating drought stress in plants.
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Affiliation(s)
- Sajitha Biju
- School of Agriculture, Food and Ecosystem Sciences (SAFES), Faculty of Science, The University of Melbourne, Parkville, VIC, 3010, Australia.
| | - Sigfredo Fuentes
- School of Agriculture, Food and Ecosystem Sciences (SAFES), Faculty of Science, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Dorin Gupta
- School of Agriculture, Food and Ecosystem Sciences (SAFES), Faculty of Science, The University of Melbourne, Parkville, VIC, 3010, Australia.
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Liu Y, Liu Q, Li X, Tang Z, Zhang Z, Gao H, Ma F, Li C. Exogenous Dopamine and MdTyDC Overexpression Enhance Apple Resistance to Fusarium solani. PHYTOPATHOLOGY 2022; 112:2503-2513. [PMID: 35801852 DOI: 10.1094/phyto-04-22-0142-r] [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
Fusarium solani, one of the main pathogenic fungi involved in apple replant disease (ARD), is a serious threat to apple growth and development. Dopamine and tyrosine decarboxylase (TyDC), a key enzyme in the dopamine synthesis pathway, have been reported to play an active role in plant responses to biotic and abiotic stresses, but little is known about the functions of dopamine and Malus domestica TyDC (MdTyDC) in the interaction between F. solani and apple roots. In this study, seedlings treated with exogenous dopamine and apple plants overexpressing MdTyDC were inoculated with F. solani; both treatments reduced the root system damage caused by F. solani. After inoculation with F. solani, exogenous dopamine increased dopamine content in the seedlings; alleviated the inhibition of biomass accumulation; increased root metabolic activity, photosynthetic efficiency, and antioxidant enzyme activities; reduced reactive oxygen species accumulation; and upregulated the expression of genes encoding chitinase, β-1,3-glucanase, and pathogenesis-related proteins. Similar results were observed in MdTyDC-overexpressing apple plants. In addition, the overexpression of MdTyDC increased tyramine content and the deposition of cell wall-bound amines in roots. Overall, our results reveal that exogenous dopamine and overexpression of MdTyDC enhance apple resistance to F. solani, which is an important application for the prevention of ARD.
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Affiliation(s)
- Yusong Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Qianwei Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Xuewen Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Zhongwen Tang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Zhijun Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Hanbing Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, China
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Sun S, Yang Z, Song Z, Wang N, Guo N, Niu J, Liu A, Bai B, Ahammed GJ, Chen S. Silicon enhances plant resistance to Fusarium wilt by promoting antioxidant potential and photosynthetic capacity in cucumber ( Cucumis sativus L.). FRONTIERS IN PLANT SCIENCE 2022; 13:1011859. [PMID: 36311065 PMCID: PMC9608603 DOI: 10.3389/fpls.2022.1011859] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/16/2022] [Indexed: 06/07/2023]
Abstract
Fusarium wilt, caused by Fusarium oxysporum f. sp. cucumerinum (Fo), is a severe soil-borne disease affecting cucumber production worldwide, particularly under monocropping in greenhouses. Silicon (Si) plays an important role in improving the resistance of crops to Fusarium wilt, but the underlying mechanism is largely unclear. Here, an in vitro study showed that 3 mmol·l-1 Si had the best inhibitory effect on the mycelial growth of F. oxysporum in potato dextrose agar (PDA) culture for 7 days. Subsequently, the occurrence of cucumber wilt disease and its mechanisms were investigated upon treatments with exogenous silicon under soil culture. The plant height, stem diameter, root length, and root activity under Si+Fo treatment increased significantly by 39.53%, 94.87%, 74.32%, and 95.11% compared with Fo only. Importantly, the control efficiency of Si+Fo was 69.31% compared with that of Fo treatment. Compared with Fo, the activities of peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) significantly increased by 148.92%, 26.47%, and 58.54%, while the contents of H2O2, O 2 · - , and malondialdehyde (MDA) notably decreased by 21.67%, 59.67%, and 38.701%, respectively, in roots of cucumber plants treated with Si + Fo. Compared with Fo treatment, the net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), maximum RuBisCO carboxylation rates (Vcmax), maximum RuBP regeneration rates (Jmax), and activities of ribulose-1,5-bisphosphate carboxylase (RuBisCO), fructose-1,6-bisphosphatase (FBPase), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and the expression of FBPA, TPI, SBPase, and FBPase in Si+Fo treatment increased significantly. Furthermore, Si alleviated stomatal closure and enhanced endogenous silicon content compared with only Fo inoculation. The study results suggest that exogenous silicon application improves cucumber resistance to Fusarium wilt by stimulating the antioxidant system, photosynthetic capacity, and stomatal movement in cucumber leaves. This study brings new insights into the potential of Si application in boosting cucumber resistance against Fusarium wilt with a bright prospect for Si use in cucumber production under greenhouse conditions.
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Affiliation(s)
- Shuangsheng Sun
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Zhengkun Yang
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Zhiyu Song
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Nannan Wang
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Ning Guo
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Jinghan Niu
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Airong Liu
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Bing Bai
- Wageningen Seed Science Centre, Laboratory of Plant Physiology, Wageningen University, Wageningen, Netherlands
| | - Golam Jalal Ahammed
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
- Henan International Joint Laboratory of Stress Resistance Regulation and Safe Production of Protected Vegetables, Luoyang, China
- Henan Engineering Technology Research Center for Horticultural Crop safety and Disease Control, Luoyang, China
| | - Shuangchen Chen
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
- Henan International Joint Laboratory of Stress Resistance Regulation and Safe Production of Protected Vegetables, Luoyang, China
- Henan Engineering Technology Research Center for Horticultural Crop safety and Disease Control, Luoyang, China
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Silica Nanoparticles Enhance the Disease Resistance of Ginger to Rhizome Rot during Postharvest Storage. NANOMATERIALS 2022; 12:nano12091418. [PMID: 35564127 PMCID: PMC9099806 DOI: 10.3390/nano12091418] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/14/2022] [Accepted: 04/17/2022] [Indexed: 02/01/2023]
Abstract
Silica nanoparticles (SiNPs) offer an ecofriendly and environmentally safe alternative for plant disease management. However, the mechanisms of SiNPs-induced disease resistance are largely unknown. This research evaluated the application of SiNPs in controlling the postharvest decay of ginger rhizomes inoculated with Fusarium solani. In vitro study showed that SiNP had little inhibitory effect on mycelial growth and spore germination of F. solani and did not significantly change mycelium’s MDA content and SDH activity. In vivo analysis indicated that SiNPs decreased the degree of decay around the wounds and decreased the accumulation of H2O2 after long-term pathogenic infection through potentiating the activities of antioxidant enzymes such as SOD, APX, PPO, and CAT. SiNP150 increased the CHI, PAL, and GLU activity at the onset of the experiment. Moreover, SiNP150 treatment increased total phenolics contents by 1.3, 1.5, and 1.2-times after 3, 5, and 7 days of treatment, and increased total flavonoids content throughout the experiment by 9.3%, 62.4%, 26.9%, 12.8%, and 60.8%, respectively. Furthermore, the expression of selected phenylpropanoid pathway-related genes was generally enhanced by SiNPs when subjected to F. solani inoculation. Together, SiNPs can effectively reduce the fungal disease of ginger rhizome through both physical and biochemical defense mechanisms.
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Bokor B, Santos CS, Kostoláni D, Machado J, da Silva MN, Carvalho SMP, Vaculík M, Vasconcelos MW. Mitigation of climate change and environmental hazards in plants: Potential role of the beneficial metalloid silicon. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126193. [PMID: 34492957 DOI: 10.1016/j.jhazmat.2021.126193] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 11/06/2020] [Accepted: 05/20/2021] [Indexed: 05/25/2023]
Abstract
In the last decades, the concentration of atmospheric CO2 and the average temperature have been increasing, and this trend is expected to become more severe in the near future. Additionally, environmental stresses including drought, salinity, UV-radiation, heavy metals, and toxic elements exposure represent a threat for ecosystems and agriculture. Climate and environmental changes negatively affect plant growth, biomass and yield production, and also enhance plant susceptibility to pests and diseases. Silicon (Si), as a beneficial element for plants, is involved in plant tolerance and/or resistance to various abiotic and biotic stresses. The beneficial role of Si has been shown in various plant species and its accumulation relies on the root's uptake capacity. However, Si uptake in plants depends on many biogeochemical factors that may be substantially altered in the future, affecting its functional role in plant protection. At present, it is not clear whether Si accumulation in plants will be positively or negatively affected by changing climate and environmental conditions. In this review, we focused on Si interaction with the most important factors of global change and environmental hazards in plants, discussing the potential role of its application as an alleviation strategy for climate and environmental hazards based on current knowledge.
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Affiliation(s)
- Boris Bokor
- Comenius University Science Park, 841 04 Bratislava, Slovakia; Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, 842 15 Bratislava, Slovakia.
| | - Carla S Santos
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Dominik Kostoláni
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, 842 15 Bratislava, Slovakia
| | - Joana Machado
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; GreenUPorto - Sustainable Agrifood Production Research Centre / Inov4Agro, DGAOT, Faculty of Sciences, University of Porto, Campus de Vairão, Rua da Agrária 747, 4485-646 Vairão, Portugal
| | - Marta Nunes da Silva
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; GreenUPorto - Sustainable Agrifood Production Research Centre / Inov4Agro, DGAOT, Faculty of Sciences, University of Porto, Campus de Vairão, Rua da Agrária 747, 4485-646 Vairão, Portugal
| | - Susana M P Carvalho
- GreenUPorto - Sustainable Agrifood Production Research Centre / Inov4Agro, DGAOT, Faculty of Sciences, University of Porto, Campus de Vairão, Rua da Agrária 747, 4485-646 Vairão, Portugal
| | - Marek Vaculík
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, 842 15 Bratislava, Slovakia; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, 845 23 Bratislava, Slovakia
| | - Marta W Vasconcelos
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
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Ahammed GJ, Yang Y. Mechanisms of silicon-induced fungal disease resistance in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 165:200-206. [PMID: 34052681 DOI: 10.1016/j.plaphy.2021.05.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/19/2021] [Indexed: 05/25/2023]
Abstract
Silicon (Si) acts as a beneficial element for plant growth and provides protection against abiotic and biotic stresses. Despite numerous reports on the beneficial role of Si in enhancing plant resistance to fungal pathogens, the underlying mechanisms remain largely unclear. Silicon shows antifungal activity; however, Si-induced improved disease resistance is partly manifested by the formation of Si polymerized mechanical obstruction under the cuticle and in cell walls, which prevents fungal ingress. Moreover, rapid production of defense compounds through secondary metabolic pathways is thought to be a key mechanism of Si-induced chemical defense against fungal pathogens beyond the physical barrier. Besides, improved mineral nutrition assures the healthy status of Si-supplied plants and a healthy plant exhibits better photosynthetic potential, antioxidant capacity and disease resistance. Multiple plant hormones and their crosstalk mediate the Si-induced basal as well as induced resistance; nonetheless, how root uptake of Si systemically modulates resistance to foliar diseases in low Si accumulating plants, needs in-depth investigation. Recent studies also indicate that Si influences effector-triggered immunity by affecting host recognition and/or limiting receptor-effector interactions. Here we review the role of Si in plant response to fungal pathogens. We also discuss and propose potential mechanisms of Si-induced enhanced disease resistance in plants. Finally, we identify some limitations of research approaches in addressing the beneficial roles of Si in biotic stress management.
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Affiliation(s)
- Golam Jalal Ahammed
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, Henan, China
| | - Youxin Yang
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China.
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Zellner W, Tubaña B, Rodrigues FA, Datnoff LE. Silicon's Role in Plant Stress Reduction and Why This Element Is Not Used Routinely for Managing Plant Health. PLANT DISEASE 2021; 105:2033-2049. [PMID: 33455444 DOI: 10.1094/pdis-08-20-1797-fe] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Numerous reviews and hundreds of refereed articles have been published on silicon's effects on abiotic and biotic stress as well as overall plant growth and development. The science for silicon is well-documented and comprehensive. However, even with this robust body of information, silicon is still not routinely used for alleviating plant stress and promoting plant growth and development. What is holding producers and growers back from using silicon? There are several possible reasons, which include: (i) lack of consistent information on which soil orders are low or limited in silicon, (ii) no universally accepted soil test for gauging the amounts of soluble silicon have been calibrated for many agronomic or horticultural crops, (iii) most analytical laboratories do not routinely assay plant tissue for silicon and current standard tissue digestion procedures used would render silicon insoluble, (iv) many scientists still state that plants are either silicon accumulators or non-accumulators when in reality all plants accumulate some silicon in their plant tissues, (v) silicon is not recognized as being necessary for plant development, (vi) lack of economic studies to show the benefits of applying silicon, and (vii) lack of extension outreach to present the positive benefits of silicon to producers and growers. Many of these issues mentioned above will need to be resolved if silicon is to become a standard practice to improve agronomic and horticultural crop production and plant health.
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Affiliation(s)
- Wendy Zellner
- Department of Biological Sciences, The University of Toledo, Toledo, OH, U.S.A
| | - Brenda Tubaña
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, U.S.A
| | - Fabrício A Rodrigues
- Universidade Federal de Viçosa, Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Viçosa, Minas Gerais State, Brazil
| | - Lawrence E Datnoff
- Department of Plant Pathology & Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA, U.S.A
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Song XP, Verma KK, Tian DD, Zhang XQ, Liang YJ, Huang X, Li CN, Li YR. Exploration of silicon functions to integrate with biotic stress tolerance and crop improvement. Biol Res 2021; 54:19. [PMID: 34238380 PMCID: PMC8265040 DOI: 10.1186/s40659-021-00344-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 06/29/2021] [Indexed: 12/04/2022] Open
Abstract
In the era of climate change, due to increased incidences of a wide range of various environmental stresses, especially biotic and abiotic stresses around the globe, the performance of plants can be affected by these stresses. After oxygen, silicon (Si) is the second most abundant element in the earth's crust. It is not considered as an important element, but can be thought of as a multi-beneficial quasi-essential element for plants. This review on silicon presents an overview of the versatile role of this element in a variety of plants. Plants absorb silicon through roots from the rhizospheric soil in the form of silicic or monosilicic acid. Silicon plays a key metabolic function in living organisms due to its relative abundance in the atmosphere. Plants with higher content of silicon in shoot or root are very few prone to attack by pests, and exhibit increased stress resistance. However, the more remarkable impact of silicon is the decrease in the number of seed intensities/soil-borne and foliar diseases of major plant varieties that are infected by biotrophic, hemi-biotrophic and necrotrophic pathogens. The amelioration in disease symptoms are due to the effect of silicon on a some factors involved in providing host resistance namely, duration of incubation, size, shape and number of lesions. The formation of a mechanical barrier beneath the cuticle and in the cell walls by the polymerization of silicon was first proposed as to how this element decreases plant disease severity. The current understanding of how this element enhances resistance in plants subjected to biotic stress, the exact functions and mechanisms by which it modulates plant biology by potentiating the host defence mechanism needs to be studied using genomics, metabolomics and proteomics. The role of silicon in helping the plants in adaption to biotic stress has been discussed which will help to plan in a systematic way the development of more sustainable agriculture for food security and safety in the future.
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Affiliation(s)
- Xiu-Peng Song
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China
| | - Krishan K Verma
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China
| | - Dan-Dan Tian
- Institute of Biotechnology, Guangxi Academy of Agricultural Sciences, Nanning, 530007, Guangxi, China
| | - Xiao-Qiu Zhang
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China
| | - Yong-Jian Liang
- Guangxi South Subtropical Agricultural Science Research Institute, Chongzuo, 532200, Guangxi, China
| | - Xing Huang
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China
| | - Chang-Ning Li
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China
| | - Yang-Rui Li
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007, Guangxi, China.
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Bathoova M, Švubová R, Bokor B, Neděla V, Tihlaříková E, Martinka M. Silicon triggers sorghum root enzyme activities and inhibits the root cell colonization by Alternaria alternata. PLANTA 2021; 253:29. [PMID: 33423117 DOI: 10.1007/s00425-020-03560-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Silicon inhibits the growth of Alternaria alternata into sorghum root cells by maintaining their integrity through stimulating biochemical defense reactions rather than by silica-based physical barrier creation. Although the ameliorating effect of silicon (Si) on plant resistance against fungal pathogens has been proven, the mechanism of its action needs to be better understood on a cellular level. The present study explores the effect of Si application in sorghum roots infected with fungus Alternaria alternata under controlled in vitro conditions. Detailed anatomical and cytological observations by both fluorescent and electron microscopy revealed that Si supplementation results in the inhibition of fungal hyphae growth into the protoplast of root cells. An approach of environmental scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy enabling spatial detection of Si even at low concentrations showed that there is no continual solid layer of silica in the root cell walls of the rhizodermis, mesodermis and exodermis physically blocking the fungal growth into the protoplasts. Additionally, biochemical evidence suggests that Si speeds up the onset of activities of phenylpropanoid pathway enzymes phenylalanine ammonia lyase, peroxidases and polyphenol oxidases involved in phenolic compounds production and deposition to plant cell walls. In conclusion, Si alleviates the negative impact of A. alternata infection by limiting hyphae penetration through sorghum root cell walls into protoplasts, thus maintaining their structural and functional integrity. This might occur by triggering plant biochemical defense responses rather than by creating compact Si layer deposits.
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Affiliation(s)
- Monika Bathoova
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava 4, Slovak Republic.
| | - Renáta Švubová
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava 4, Slovak Republic
| | - Boris Bokor
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava 4, Slovak Republic
- Comenius University Science Park, Comenius University in Bratislava, Ilkovicova 8, 841 04, Bratislava, Slovak Republic
| | - Vilém Neděla
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Kralovopolska 147, 612 00, Brno, Czech Republic
| | - Eva Tihlaříková
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Kralovopolska 147, 612 00, Brno, Czech Republic
| | - Michal Martinka
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava 4, Slovak Republic
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11
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Cacique IS, Pinto LFCC, Aucique-Pérez CE, Wordell Filho JA, Rodrigues FA. Physiological and biochemical insights into the basal level of resistance of two maize hybrids in response to Fusarium verticillioides infection. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 152:194-210. [PMID: 32422536 DOI: 10.1016/j.plaphy.2020.04.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/24/2020] [Accepted: 04/25/2020] [Indexed: 06/11/2023]
Abstract
Fusarium stalk rot (FSR), caused by Fusarium verticillioides, is one of the most destructive diseases impacting maize yield worldwide. In this study, net carbon assimilation rate (A), stomatal conductance to water vapor (gs), transpiration rate (E), and internal CO2 concentration (Ci) were evaluated on leaves and the activities of enzymes (chitinase (CHI), β-1-3-glucanase (GLU), phenylalanine ammonia-lyase (PAL), polyphenoloxidase (PPO), catalase (CAT), ascorbate peroxidase (APX), peroxidase (POX)) as well the concentrations of total soluble phenolics (TSP), lignin-thioglycolic acid (LTGA) derivatives, and malondialdehyde (MDA) were evaluated in the internodes and nodes of plants from maize hybrids moderately resistant (BRS 1035) and susceptible (30F35Y) to FSR. The upward relative lesion length (URLL) and radial fungal colonization (RFC) were 46 and 29% lower for the BRS 1035 hybrid in comparison to 30F35Y hybrid, respectively, at 30 after inoculation (dai). For both hybrids, A, gs, and E values significantly decreased while the Ci values increased on infected leaves compared to noninoculated plants. Inoculated plants from BRS 1035 hybrid showed an increase in A compared to inoculated plants from 30F35Y hybrid, and the increase in Ci values was greater for plants from 30F35Y hybrid at 30 dai compared to plants from BRS 1035 hybrid. The CHI, GLU, PPO, CAT, APX, and POX activities increased for inoculated plants from both hybrids compared to the noninoculated plants. In the internodes region, the increase in the activities of CHI (during the infection process of F. verticillioides) and GLU (at earlier stages of F. verticillioides infection) was more pronounced for plants from BRS 1035 hybrid than for plants from 30F35Y hybrid. In the region of the nodes, activities of CHI (during the infection process of F. verticillioides), PAL (at 20 dai), PPO (at 30 dai), and CAT and POX (both at three dai) were more pronounced for plants from BRS 1035 hybrid than for plants from 30F35Y hybrid. In the internodes region, the lower TSP concentration at 30 dai was linked to a high concentration of LTGA derivatives for inoculated plants from BRS 1035 hybrid compared to inoculated plants from 30F35Y hybrid. Taking together, the results of the present study allowed to conclude that the infection by F. verticillioides triggered physiological and biochemical changes on the stalk of maize plants influencing photosynthesis on leaves. A more robust antioxidative metabolism for reactive oxygen species removal in association with an efficient and strong activity of defense enzymes helped to minimize the cellular damage caused by F. verticillioides infection resulting, therefore, in an increase in maize resistance to FSR.
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Affiliation(s)
- Isaias S Cacique
- Departamento de Fitopatologia, Laboratório da Interação Patógeno-Hospedeiro, Universidade Federal de Viçosa, Zip Code 36570-900, Viçosa, MG, Brazil
| | - Luiz F C C Pinto
- Departamento de Fitopatologia, Laboratório da Interação Patógeno-Hospedeiro, Universidade Federal de Viçosa, Zip Code 36570-900, Viçosa, MG, Brazil
| | - Carlos E Aucique-Pérez
- Departamento de Fitopatologia, Laboratório da Interação Patógeno-Hospedeiro, Universidade Federal de Viçosa, Zip Code 36570-900, Viçosa, MG, Brazil
| | - João A Wordell Filho
- Laboratório de Fitossanidade, EPAGRI/CEPAF, Zip Code 89801-970, Chapecó, Santa Catarina State, Brazil
| | - Fabrício A Rodrigues
- Departamento de Fitopatologia, Laboratório da Interação Patógeno-Hospedeiro, Universidade Federal de Viçosa, Zip Code 36570-900, Viçosa, MG, Brazil.
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Bubici G, Kaushal M, Prigigallo MI, Gómez-Lama Cabanás C, Mercado-Blanco J. Biological Control Agents Against Fusarium Wilt of Banana. Front Microbiol 2019; 10:616. [PMID: 31024469 PMCID: PMC6459961 DOI: 10.3389/fmicb.2019.00616] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 03/11/2019] [Indexed: 11/13/2022] Open
Abstract
In the last century, the banana crop and industry experienced dramatic losses due to an epidemic of Fusarium wilt of banana (FWB), caused by Fusarium oxysporum f.sp. cubense (Foc) race 1. An even more dramatic menace is now feared due to the spread of Foc tropical race 4. Plant genetic resistance is generally considered as the most plausible strategy for controlling effectively such a devastating disease, as occurred for the first round of FWB epidemic. Nevertheless, with at least 182 articles published since 1970, biological control represents a large body of knowledge on FWB. Remarkably, many studies deal with biological control agents (BCAs) that reached the field-testing stage and even refer to high effectiveness. Some selected BCAs have been repeatedly assayed in independent trials, suggesting their promising value. Overall under field conditions, FWB has been controlled up to 79% by using Pseudomonas spp. strains, and up to 70% by several endophytes and Trichoderma spp. strains. Lower biocontrol efficacy (42-55%) has been obtained with arbuscular mycorrhizal fungi, Bacillus spp., and non-pathogenic Fusarium strains. Studies on Streptomyces spp. have been mostly limited to in vitro conditions so far, with very few pot-experiments, and none conducted in the field. The BCAs have been applied with diverse procedures (e.g., spore suspension, organic amendments, bioformulations, etc.) and at different stages of plant development (i.e., in vitro, nursery, at transplanting, post-transplanting), but there has been no evidence for a protocol better than another. Nonetheless, new bioformulation technologies (e.g., nanotechnology, formulation of microbial consortia and/or their metabolites, etc.) and tailor-made consortia of microbial strains should be encouraged. In conclusion, the literature offers many examples of promising BCAs, suggesting that biocontrol can greatly contribute to limit the damage caused by FWB. More efforts should be done to further validate the currently available outcomes, to deepen the knowledge on the most valuable BCAs, and to improve their efficacy by setting up effective formulations, application protocols, and integrated strategies.
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Affiliation(s)
- Giovanni Bubici
- Consiglio Nazionale delle Ricerche (CNR), Istituto per la Protezione Sostenibile delle Piante (IPSP), Bari, Italy
| | - Manoj Kaushal
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, Tanzania
| | - Maria Isabella Prigigallo
- Consiglio Nazionale delle Ricerche (CNR), Istituto per la Protezione Sostenibile delle Piante (IPSP), Bari, Italy
| | | | - Jesús Mercado-Blanco
- Department of Crop Protection, Institute for Sustainable Agriculture (CSIC), Córdoba, Spain
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13
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Frew A, Weston LA, Reynolds OL, Gurr GM. The role of silicon in plant biology: a paradigm shift in research approach. ANNALS OF BOTANY 2018; 121:1265-1273. [PMID: 29438453 PMCID: PMC6007437 DOI: 10.1093/aob/mcy009] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/15/2018] [Indexed: 05/04/2023]
Abstract
BACKGROUND Silicon (Si) is known to have numerous beneficial effects on plants, alleviating diverse forms of abiotic and biotic stress. Research on this topic has accelerated in recent years and revealed multiple effects of Si in a range of plant species. Available information regarding the impact of Si on plant defence, growth and development is fragmented, discipline-specific, and usually focused on downstream, distal phenomena rather than underlying effects. Accordingly, there is a growing need for studies that address fundamental metabolic and regulatory processes, thereby allowing greater unification and focus of current research across disciplines. SCOPE AND CONCLUSIONS Silicon is often regarded as a plant nutritional 'non-entity'. A suite of factors associated with Si have been recently identified, relating to plant chemistry, physiology, gene regulation and interactions with other organisms. Research to date has typically focused on the impact of Si application upon plant stress responses. However, the fundamental, underlying mechanisms that account for the manifold effects of Si in plant biology remain undefined. Here, the known effects of Si in higher plants relating to alleviation of both abiotic and biotic stress are briefly reviewed and the potential importance of Si in plant primary metabolism is discussed, highlighting the need for a unifying research framework targeting common underlying mechanisms. The traditional approach of discipline-specific work on single stressors in individual plant species is currently inadequate. Thus, a holistic and comparative approach is proposed to assess the mode of action of Si between plant trait types (e.g. C3, C4 and CAM; Si accumulators and non-accumulators) and between biotic and abiotic stressors (pathogens, herbivores, drought, salt), considering potential pathways (i.e. primary metabolic processes) highlighted by recent empirical evidence. Utilizing genomic, transcriptomic, proteomic and metabolomic approaches in such comparative studies will pave the way for unification of the field and a deeper understanding of the role of Si in plants.
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Affiliation(s)
- Adam Frew
- School of Agricultural and Wine Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia
- Graham Centre for Agricultural Innovation, Wagga Wagga, New South Wales, Australia
- For correspondence. E-mail
| | - Leslie A Weston
- School of Agricultural and Wine Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia
- Graham Centre for Agricultural Innovation, Wagga Wagga, New South Wales, Australia
| | - Olivia L Reynolds
- Graham Centre for Agricultural Innovation, Wagga Wagga, New South Wales, Australia
- Biosecurity and Food Safety, New South Wales Department of Primary Industries, Narellan, New South Wales, Australia
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Geoff M Gurr
- Graham Centre for Agricultural Innovation, Wagga Wagga, New South Wales, Australia
- School of Agricultural and Wine Sciences, Charles Sturt University, Orange, New South Wales, Australia
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
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14
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Zhou X, Shen Y, Fu X, Wu F. Application of Sodium Silicate Enhances Cucumber Resistance to Fusarium Wilt and Alters Soil Microbial Communities. FRONTIERS IN PLANT SCIENCE 2018; 9:624. [PMID: 29868080 PMCID: PMC5958222 DOI: 10.3389/fpls.2018.00624] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 04/19/2018] [Indexed: 05/06/2023]
Abstract
Exogenous silicates can enhance plant resistance to pathogens and change soil microbial communities. However, the relationship between changes in soil microbial communities and enhanced plant resistance remains unclear. Here, effects of exogenous sodium silicate on cucumber (Cucumis sativus L.) seedling resistance to Fusarium wilt caused by the soil-borne pathogen Fusarium oxysporum f.sp. cucumerinum Owen (FOC) were investigated by drenching soil with 2 mM sodium silicate. Soil bacterial and fungal community abundances and compositions were estimated by real-time PCR and high-throughput amplicon sequencing; then, feedback effects of changes in soil biota on cucumber seedling resistance to FOC were assessed. Moreover, effects of sodium silicate on the growth of FOC and Streptomyces DHV3-2, an antagonistic bacterium to FOC, were investigated both in vitro and in the soil environment. Results showed that exogenous sodium silicate enhanced cucumber seedling growth and resistance to FOC. In bare soil, sodium silicate increased bacterial and fungal community abundances and diversities. In cucumber-cultivated soil, sodium silicate increased bacterial community abundances, but decreased fungal community abundances and diversities. Sodium silicate also changed soil bacterial and fungal communality compositions, and especially, decreased the relative abundances of microbial taxa containing plant pathogens but increased these with plant-beneficial potentials. Moreover, sodium silicate increased the abundance of Streptomyces DHV3-2 in soil. Soil biota from cucumber-cultivated soil treated with sodium silicate decreased cucumber seedling Fusarium wilt disease index, and enhanced cucumber seedling growth and defense-related enzyme activities in roots. Sodium silicate at pH 9.85 inhibited FOC abundance in vitro, but did not affect FOC abundance in soil. Overall, our results suggested that, in cucumber-cultivated soil, sodium silicate increased cucumber seedling resistance to Fusarium wilt by changing soil microbial communities rather than by directly inhibiting the growth of FOC.
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Affiliation(s)
- Xingang Zhou
- Department of Horticulture, Northeast Agricultural University, Harbin, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture, Harbin, China
| | - Yanhui Shen
- Department of Horticulture, Northeast Agricultural University, Harbin, China
| | - Xuepeng Fu
- Department of Horticulture, Northeast Agricultural University, Harbin, China
| | - Fengzhi Wu
- Department of Horticulture, Northeast Agricultural University, Harbin, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture, Harbin, China
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15
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Debona D, Rodrigues FA, Datnoff LE. Silicon's Role in Abiotic and Biotic Plant Stresses. ANNUAL REVIEW OF PHYTOPATHOLOGY 2017; 55:85-107. [PMID: 28504920 DOI: 10.1146/annurev-phyto-080516-035312] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Silicon (Si) plays a pivotal role in the nutritional status of a wide variety of monocot and dicot plant species and helps them, whether directly or indirectly, counteract abiotic and/or biotic stresses. In general, plants with a high root or shoot Si concentration are less prone to pest attack and exhibit enhanced tolerance to abiotic stresses such as drought, low temperature, or metal toxicity. However, the most remarkable effect of Si is the reduction in the intensities of a number of seedborne, soilborne, and foliar diseases in many economically important crops that are caused by biotrophic, hemibiotrophic, and necrotrophic plant pathogens. The reduction in disease symptom expression is due to the effect of Si on some components of host resistance, including incubation period, lesion size, and lesion number. The mechanical barrier formed by the polymerization of Si beneath the cuticle and in the cell walls was the first proposed hypothesis to explain how this element reduced the severity of plant diseases. However, new insights have revealed that many plant species supplied with Si have the phenylpropanoid and terpenoid pathways potentiated and have a faster and stronger transcription of defense genes and higher activities of defense enzymes. Photosynthesis and the antioxidant system are also improved for Si-supplied plants. Although the current understanding of how this overlooked element improves plant reaction against pathogen infections, pest attacks, and abiotic stresses has advanced, the exact mechanism(s) by which it modulates plant physiology through the potentiation of host defense mechanisms still needs further investigation at the genomic, metabolomic, and proteomic levels.
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Affiliation(s)
- Daniel Debona
- Department of Plant Pathology, Laboratory of Host-Pathogen Interaction, Viçosa Federal University, Viçosa, Minas Gerais State, Brazil, 36570-900;
| | - Fabrício A Rodrigues
- Department of Plant Pathology, Laboratory of Host-Pathogen Interaction, Viçosa Federal University, Viçosa, Minas Gerais State, Brazil, 36570-900;
| | - Lawrence E Datnoff
- Department of Plant Pathology & Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803;
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16
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Nazaralian S, Majd A, Irian S, Najafi F, Ghahremaninejad F, Landberg T, Greger M. Comparison of silicon nanoparticles and silicate treatments in fenugreek. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 115:25-33. [PMID: 28300729 DOI: 10.1016/j.plaphy.2017.03.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 03/10/2017] [Accepted: 03/10/2017] [Indexed: 05/03/2023]
Abstract
Silicon (Si) fertilization improves crop cultivation and is commonly added in the form of soluble silicates. However, most natural plant-available Si originates from plant formed amorphous SiO2 particles, phytoliths, similar to SiO2-nanoparticles (SiNP). In this work we, therefore, compared the effect by sodium silicate and that of SiNP on Si accumulation, activity of antioxidative stress enzymes catalase, peroxidase, superoxide dismutase, lignification of xylem cell walls and activity of phenylalanine ammonia-lyase (PAL) as well as expression of genes for the putative silicon transporter (PST), defensive (Tfgd 1) and phosphoenolpyruvate carboxykinase (PEPCK) and protein in fenugreek (Trigonella foenum-graecum L.) grown in hydroponics. The results showed that Si was taken up from both silicate and SiNP treatments and increasing sodium silicate addition increased the translocation of Si to the shoot, while this was not shown with increasing SiNP addition. The silicon transporter PST was upregulated at a greater level when sodium silicate was added compared with SiNP addition. There were no differences in effects between sodium silicate and SiNP treatments on the other parameters measured. Both treatments increased the uptake and accumulation of Si, xylem cell wall lignification, cell wall thickness, PAL activity and protein concentration in seedlings, while there was no effect on antioxidative enzyme activity. Tfgd 1 expression was strongly downregulated in leaves at Si addition. The similarity in effects by silicate and SiNP would be due to that SiNP releases silicate, which may be taken up, shown by a decrease in SiNP particle size with time in the medium.
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Affiliation(s)
- Sanam Nazaralian
- Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, 15719-14911, Tehran, Iran.
| | - Ahmad Majd
- Department of Biology, Faculty of Science, North Tehran Branch of Islamic Azad University, 16679-34783, Tehran, Iran
| | - Saeed Irian
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, 15719-14911, Tehran, Iran
| | - Farzaneh Najafi
- Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, 15719-14911, Tehran, Iran
| | - Farrokh Ghahremaninejad
- Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, 15719-14911, Tehran, Iran
| | - Tommy Landberg
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden
| | - Maria Greger
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden
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17
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Conde A, Pimentel D, Neves A, Dinis LT, Bernardo S, Correia CM, Gerós H, Moutinho-Pereira J. Kaolin Foliar Application Has a Stimulatory Effect on Phenylpropanoid and Flavonoid Pathways in Grape Berries. FRONTIERS IN PLANT SCIENCE 2016; 7:1150. [PMID: 27551286 PMCID: PMC4976103 DOI: 10.3389/fpls.2016.01150] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 07/18/2016] [Indexed: 05/17/2023]
Abstract
Drought, elevated air temperature, and high evaporative demand are increasingly frequent during summer in grape growing areas like the Mediterranean basin, limiting grapevine productivity and berry quality. The foliar exogenous application of kaolin, a radiation-reflecting inert mineral, has proven effective in mitigating the negative impacts of these abiotic stresses in grapevine and other fruit crops, however, little is known about its influence on the composition of the grape berry and on key molecular mechanisms and metabolic pathways notably important for grape berry quality parameters. Here, we performed a thorough molecular and biochemical analysis to assess how foliar application of kaolin influences major secondary metabolism pathways associated with berry quality-traits, leading to biosynthesis of phenolics and anthocyanins, with a focus on the phenylpropanoid, flavonoid (both flavonol- and anthocyanin-biosynthetic) and stilbenoid pathways. In grape berries from different ripening stages, targeted transcriptional analysis by qPCR revealed that several genes involved in these pathways-VvPAL1, VvC4H1, VvSTSs, VvCHS1, VvFLS1, VvDFR, and VvUFGT-were more expressed in response to the foliar kaolin treatment, particularly in the latter maturation phases. In agreement, enzymatic activities of phenylalanine ammonia lyase (PAL), flavonol synthase (FLS), and UDP-glucose:flavonoid 3-O-glucosyltransferase (UFGT) were about two-fold higher in mature or fully mature berries from kaolin-treated plants, suggesting regulation also at a transcriptional level. The expression of the glutathione S-transferase VvGST4, and of the tonoplast anthocyanin transporters VvMATE1 and VvABCC1 were also all significantly increased at véraison and in mature berries, thus, when anthocyanins start to accumulate in the vacuole, in agreement with previously observed higher total concentrations of phenolics and anthocyanins in berries from kaolin-treated plants, especially at full maturity stage. Metabolomic analysis by reverse phase LC-QTOF-MS confirmed several kaolin-induced modifications including a significant increase in the quantities of several secondary metabolites including flavonoids and anthocyanins in the latter ripening stages, probably resulting from the general stimulation of the phenylpropanoid and flavonoid pathways.
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Affiliation(s)
- Artur Conde
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
- Grupo de Investigação em Biologia Vegetal Aplicada e Inovação Agroalimentar (AgroBioPlant), Departamento de Biologia, Universidade do MinhoBraga, Portugal
| | - Diana Pimentel
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
- Grupo de Investigação em Biologia Vegetal Aplicada e Inovação Agroalimentar (AgroBioPlant), Departamento de Biologia, Universidade do MinhoBraga, Portugal
| | - Andreia Neves
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
- Grupo de Investigação em Biologia Vegetal Aplicada e Inovação Agroalimentar (AgroBioPlant), Departamento de Biologia, Universidade do MinhoBraga, Portugal
| | - Lia-Tânia Dinis
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
| | - Sara Bernardo
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
| | - Carlos M. Correia
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
| | - Hernâni Gerós
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
- Grupo de Investigação em Biologia Vegetal Aplicada e Inovação Agroalimentar (AgroBioPlant), Departamento de Biologia, Universidade do MinhoBraga, Portugal
- Department of Biology, Centre of Molecular and Environmental Biology, University of MinhoBraga, Portugal
| | - José Moutinho-Pereira
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto DouroVila Real, Portugal
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18
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Whan JA, Dann EK, Aitken EAB. Effects of silicon treatment and inoculation with Fusarium oxysporum f. sp. vasinfectum on cellular defences in root tissues of two cotton cultivars. ANNALS OF BOTANY 2016; 118:219-26. [PMID: 27288509 PMCID: PMC4970361 DOI: 10.1093/aob/mcw095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 02/22/2016] [Indexed: 05/06/2023]
Abstract
BACKGROUND AND AIMS Silicon has been shown to enhance the resistance of plants to fungal and bacterial pathogens. Here, the effect of potassium silicate was assessed on two cotton (Gossypium hirsutum) cultivars subsequently inoculated with Fusarium oxysporum f. sp. vasinfectum (Fov). Sicot 189 is moderately resistant whilst Sicot F-1 is the second most resistant commercial cultivar presently available in Australia. METHODS Transmission and light microscopy were used to compare cellular modifications in root cells after these different treatments. The accumulation of phenolic compounds and lignin was measured. KEY RESULTS Cellular alterations including the deposition of electron-dense material, degradation of fungal hyphae and occlusion of endodermal cells were more rapidly induced and more intense in endodermal and vascular regions of Sicot F-1 plants supplied with potassium silicate followed by inoculation with Fov than in similarly treated Sicot 189 plants or in silicate-treated plants of either cultivar not inoculated with Fov. Significantly more phenolic compounds were present at 7 d post-infection (dpi) in root extracts of Sicot F-1 plants treated with potassium silicate followed by inoculation with Fov compared with plants from all other treatments. The lignin concentration at 3 dpi in root material from Sicot F-1 treated with potassium silicate and inoculated with Fov was significantly higher than that from water-treated and inoculated plants. CONCLUSIONS This study demonstrates that silicon treatment can affect cellular defence responses in cotton roots subsequently inoculated with Fov, particularly in Sicot F-1, a cultivar with greater inherent resistance to this pathogen. This suggests that silicon may interact with or initiate defence pathways faster in this cultivar than in the less resistant cultivar.
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Affiliation(s)
- Jennifer A Whan
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Elizabeth K Dann
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, 2CWest Ecosciences Precinct, GPO Box 267, Brisbane, QLD 4001, Australia
| | - Elizabeth A B Aitken
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
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Araujo L, Paschoalino RS, Rodrigues FÁ. Microscopic Aspects of Silicon-Mediated Rice Resistance to Leaf Scald. PHYTOPATHOLOGY 2016; 106:132-41. [PMID: 26237696 DOI: 10.1094/phyto-04-15-0109-r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
This study investigated the effect of silicon (Si) on the potentiation of rice resistance against leaf scald at the microscopic level. Rice plants ('Primavera') were grown in a nutrient solution containing 0 (-Si) or 2 mM (+Si) Si. The foliar Si concentration of the +Si plants (3.6 dag/kg) increased in comparison with the -Si plants (0.3 dag/kg). An X-ray microanalysis revealed that the leaf tissue of +Si plants infected with Microdochium oryzae had higher peaks and deposition of insoluble Si than that of -Si plants. The high foliar Si concentration for the +Si plants reduced the expansion of leaf scald lesions. Scanning electron microscopy revealed that fungal hyphae and appressorium-like structures of M. oryzae were more abundant in the leaf surface of -Si plants relative to +Si plants. At both histopathological and ultrastructural levels, fungal hyphae grew abundantly into the leaf tissue of -Si plants. By contrast, rice cell walls were rarely degraded and fungal hyphae were often surrounded by amorphous granular material in the leaf tissue of +Si plants. Conidiophores emerged from stomata 36 h after fungal penetration, and conidia were noticed inside the leaf tissue of the -Si plants in great abundance. The collective results of the present study showed a high concentration and deposition of Si and a considerable deposition of phenolic-like compounds in the leaf tissue of +Si plants. These results indicate that the potentiation of the phenylpropanoid pathway in these plants supplied with Si was favorable for the increase in rice resistance to leaf scald.
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Affiliation(s)
- Leonardo Araujo
- Universidade Federal de Viçosa, Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Viçosa, Minas Gerais State, CEP 36570-900, Brazil
| | - Rayane Silva Paschoalino
- Universidade Federal de Viçosa, Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Viçosa, Minas Gerais State, CEP 36570-900, Brazil
| | - Fabrício Ávila Rodrigues
- Universidade Federal de Viçosa, Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Viçosa, Minas Gerais State, CEP 36570-900, Brazil
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Belowground Defence Strategies Against Fusarium oxysporum. BELOWGROUND DEFENCE STRATEGIES IN PLANTS 2016. [DOI: 10.1007/978-3-319-42319-7_4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Martínez-Rodríguez JDC, De la Mora-Amutio M, Plascencia-Correa LA, Audelo-Regalado E, Guardado FR, Hernández-Sánchez E, Peña-Ramírez YJ, Escalante A, Beltrán-García MJ, Ogura T. Cultivable endophytic bacteria from leaf bases of Agave tequilana and their role as plant growth promoters. Braz J Microbiol 2015; 45:1333-9. [PMID: 25763038 PMCID: PMC4323307 DOI: 10.1590/s1517-83822014000400025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 04/17/2014] [Indexed: 12/02/2022] Open
Abstract
Agave tequilana Weber var. ‘Azul’ is grown for the production of tequila, inulin and syrup. Diverse bacteria inhabit plant tissues and play a crucial role for plant health and growth. In this study culturable endophytic bacteria were extracted from leaf bases of 100 healthy Agave tequilana plants. In plant tissue bacteria occurred at mean population densities of 3 million CFU/g of fresh plant tissue. Three hundred endophytic strains were isolated and 16s rDNA sequences grouped the bacteria into eight different taxa that shared high homology with other known sequences. Bacterial endophytes were identified as Acinectobacter sp., A. baumanii, A. bereziniae, Cronobacter sakazakii, Enterobacter hormaechei, Bacillus sp. Klebsiella oxytoca, Pseudomonas sp., Enterococcus casseliflavus, Leuconostoc mesenteroides subsp. mesenteroides and Gluconobacter oxydans. Isolates were confirmed to be plant growth promoting bacteria (PGPB) by their capacities for nitrogen fixation, auxin production, phosphate solubilization, or antagonism against Fusarium oxysporum AC132. E. casseliflavus JM47 and K. oxytoca JM26 secreted the highest concentrations of IAA. The endophyte Acinectobacter sp. JM58 exhibited the maximum values for nitrogen fixation and phosphate solubilization index (PSI). Inhibition of fungi was found in Pseudomonas sp. JM9p and K. oxytoca JM26. Bacterial endophytes show promise for use as bio-inoculants for agave cultivation. Use of endophytes to enhance cultivation of agave may be particularly important for plants produced by micropropagation techniques, where native endophytes may have been lost.
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Affiliation(s)
- Julia del C Martínez-Rodríguez
- Instituto de Ingeniería Universidad Autónoma de Baja California Campus MexicaliMexicali México Instituto de Ingeniería, Universidad Autónoma de Baja California, Campus Mexicali, Mexicali, México
| | - Marcela De la Mora-Amutio
- Instituto de Ingeniería Universidad Autónoma de Baja California Campus MexicaliMexicali México Instituto de Ingeniería, Universidad Autónoma de Baja California, Campus Mexicali, Mexicali, México
| | - Luis A Plascencia-Correa
- Departamento de Química Instituto de Ciencias Exactas y Terrestres Universidad Autónoma de Guadalajara Jalisco México Departamento de Química, Instituto de Ciencias Exactas y Terrestres, Universidad Autónoma de Guadalajara, Jalisco, México
| | - Esmeralda Audelo-Regalado
- Departamento de Química Instituto de Ciencias Exactas y Terrestres Universidad Autónoma de Guadalajara Jalisco México Departamento de Química, Instituto de Ciencias Exactas y Terrestres, Universidad Autónoma de Guadalajara, Jalisco, México
| | - Francisco R Guardado
- Departamento de Química Instituto de Ciencias Exactas y Terrestres Universidad Autónoma de Guadalajara Jalisco México Departamento de Química, Instituto de Ciencias Exactas y Terrestres, Universidad Autónoma de Guadalajara, Jalisco, México
| | - Elías Hernández-Sánchez
- Colegio de Postgraduados Carretera México-Texcoco Texcoco México Colegio de Postgraduados Carretera México-Texcoco, Texcoco, México
| | - Yuri J Peña-Ramírez
- El Colegio de la Frontera Sur A.C. Unidad Campeche LermaCampeche México El Colegio de la Frontera Sur A.C. Unidad Campeche, Lerma, Campeche, México
| | - Adelfo Escalante
- Departamento de Ingeniería Celular y Biocatálisis Instituto de Biotecnología Universidad Nacional Autónoma de México CuernavacaMorelos México Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Miguel J Beltrán-García
- Departamento de Química Instituto de Ciencias Exactas y Terrestres Universidad Autónoma de Guadalajara Jalisco México Departamento de Química, Instituto de Ciencias Exactas y Terrestres, Universidad Autónoma de Guadalajara, Jalisco, México
| | - Tetsuya Ogura
- Departamento de Química Instituto de Ciencias Exactas y Terrestres Universidad Autónoma de Guadalajara Jalisco México Departamento de Química, Instituto de Ciencias Exactas y Terrestres, Universidad Autónoma de Guadalajara, Jalisco, México
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