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Wairich A, Wang Y, Werner BT, Vaziritabar Y, Frei M, Wu LB. The role of ascorbate redox turnover in iron toxicity tolerance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 215:109045. [PMID: 39154421 DOI: 10.1016/j.plaphy.2024.109045] [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: 05/12/2024] [Revised: 07/26/2024] [Accepted: 08/13/2024] [Indexed: 08/20/2024]
Abstract
Iron (Fe) toxicity is a major abiotic stress in lowland rice production. Breeding tolerant varieties has proven challenging due to the complex genetic architecture of Fe toxicity tolerance and the strong genotype-by-environment interactions. Additionally, conventional methods for phenotyping visible stress symptoms are often inaccurate, inconsistent, and lack reproducibility. In our previous work, we identified that ascorbate redox regulation, mediated by the activities of dehydroascorbate reductase (DHAR) and ascorbate oxidase (AO), contributed to high tolerance in an indica rice genotype across various environments. To explore whether this mechanism is common among other rice genotypes, we selected ten genotypes with contrasting stress symptoms under Fe-toxic conditions to examine the roles of DHAR and AO in regulating Fe toxicity tolerance. Additionally, we aimed to develop objective and accurate image-based phenotyping methods to replace the traditional leaf bronzing scoring method. Among the ten genotypes we tested, we found significant positive correlations between DHAR activity and stress symptoms in plants grown under both Fe toxicity and control conditions, suggesting a general link between ascorbate redox regulation and Fe toxicity tolerance. Using RGB signals from leaf images of plants exposed to 1000 mg/L Fe2+, we evaluated 36 different color indices to quantify stress symptoms. We identified the normalized green‒red difference index as most significant in quantifying stress symptoms under Fe toxicity conditions. Our findings suggest that DHAR activity could be potentially employed as a biomarker in the screening of rice germplasms and breeding tolerant cultivars to Fe toxicity.
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Affiliation(s)
- Andriele Wairich
- Department of Agronomy and Crop Physiology, Institute for Agronomy and Plant Breeding I, Justus Liebig University, Giessen, Germany
| | - Yue Wang
- Department of Agronomy and Crop Physiology, Institute for Agronomy and Plant Breeding I, Justus Liebig University, Giessen, Germany
| | - Bernhard T Werner
- Institute for Phytopathology, Justus Liebig University, Giessen, Germany
| | - Yavar Vaziritabar
- Department of Agronomy and Crop Physiology, Institute for Agronomy and Plant Breeding I, Justus Liebig University, Giessen, Germany
| | - Michael Frei
- Department of Agronomy and Crop Physiology, Institute for Agronomy and Plant Breeding I, Justus Liebig University, Giessen, Germany
| | - Lin-Bo Wu
- Department of Agronomy and Crop Physiology, Institute for Agronomy and Plant Breeding I, Justus Liebig University, Giessen, Germany.
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2
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Wairich A, Aung MS, Ricachenevsky FK, Masuda H. You can't always get as much iron as you want: how rice plants deal with excess of an essential nutrient. FRONTIERS IN PLANT SCIENCE 2024; 15:1381856. [PMID: 39100081 PMCID: PMC11294178 DOI: 10.3389/fpls.2024.1381856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 06/10/2024] [Indexed: 08/06/2024]
Abstract
Iron (Fe) is an essential nutrient for almost all organisms. However, free Fe within cells can lead to damage to macromolecules and oxidative stress, making Fe concentrations tightly controlled. In plants, Fe deficiency is a common problem, especially in well-aerated, calcareous soils. Rice (Oryza sativa L.) is commonly cultivated in waterlogged soils, which are hypoxic and can cause Fe reduction from Fe3+ to Fe2+, especially in low pH acidic soils, leading to high Fe availability and accumulation. Therefore, Fe excess decreases rice growth and productivity. Despite the widespread occurrence of Fe excess toxicity, we still know little about the genetic basis of how rice plants respond to Fe overload and what genes are involved in variation when comparing genotypes with different tolerance levels. Here, we review the current knowledge about physiological and molecular data on Fe excess in rice, providing a comprehensive summary of the field.
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Affiliation(s)
- Andriele Wairich
- Department of Agronomy and Crop Physiology, Justus Liebig University Giessen, Giessen, Germany
| | - May Sann Aung
- Department of Biological Production, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
| | - Felipe Klein Ricachenevsky
- Botany Department, Institute of Biosciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
- Center of Biotechnology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Hiroshi Masuda
- Department of Biological Production, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
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3
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Miao S, Lu J, Zhang G, Jiang J, Li P, Qian Y, Wang W, Xu J, Zhang F, Zhao X. Candidate Genes and Favorable Haplotypes Associated with Iron Toxicity Tolerance in Rice. Int J Mol Sci 2024; 25:6970. [PMID: 39000075 PMCID: PMC11241266 DOI: 10.3390/ijms25136970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/15/2024] [Accepted: 06/21/2024] [Indexed: 07/16/2024] Open
Abstract
Iron (Fe) toxicity is a major issue adversely affecting rice production worldwide. Unfortunately, the physiological and genetic mechanisms underlying Fe toxicity tolerance in rice remain relatively unknown. In this study, we conducted a genome-wide association study using a diverse panel consisting of 551 rice accessions to identify genetic mechanisms and candidate genes associated with Fe toxicity tolerance. Of the 29 quantitative trait loci (QTL) for Fe toxicity tolerance detected on chromosomes 1, 2, 5, and 12, five (qSH_Fe5, qSFW_Fe2.3, qRRL5.1, qRSFW1.1, and qRSFW12) were selected to identify candidate genes according to haplotype and bioinformatics analyses. The following five genes were revealed as promising candidates: LOC_Os05g40160, LOC_Os05g40180, LOC_Os12g36890, LOC_Os12g36900, and LOC_Os12g36940. The physiological characteristics of rice accessions with contrasting Fe toxicity tolerance reflected the importance of reactive oxygen species-scavenging antioxidant enzymes and Fe homeostasis for mitigating the negative effects of Fe toxicity on rice. Our findings have clarified the genetic and physiological mechanisms underlying Fe toxicity tolerance in rice. Furthermore, we identified valuable genetic resources for future functional analyses and the development of Fe toxicity-tolerant rice varieties via marker-assisted selection.
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Affiliation(s)
- Siyu Miao
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Jingbing Lu
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Guogen Zhang
- College of Agronomy, Anhui Agricultural University, Hefei 230036, China;
| | - Jing Jiang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Pingping Li
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Yukang Qian
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Wensheng Wang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
- College of Agronomy, Anhui Agricultural University, Hefei 230036, China;
| | - Jianlong Xu
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
| | - Fan Zhang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
- College of Agronomy, Anhui Agricultural University, Hefei 230036, China;
| | - Xiuqin Zhao
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (S.M.); (J.L.); (J.J.); (P.L.); (Y.Q.); (W.W.); (J.X.)
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4
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Li G, Wu J, Kronzucker HJ, Li B, Shi W. Physiological and molecular mechanisms of plant-root responses to iron toxicity. JOURNAL OF PLANT PHYSIOLOGY 2024; 297:154257. [PMID: 38688043 DOI: 10.1016/j.jplph.2024.154257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 05/02/2024]
Abstract
The chemical form and physiological activity of iron (Fe) in soil are dependent on soil pH and redox potential (Eh), and Fe levels in soils are frequently elevated to the point of causing Fe toxicity in plants, with inhibition of normal physiological activities and of growth and development. In this review, we describe how iron toxicity triggers important physiological changes, including nitric-oxide (NO)-mediated potassium (K+) efflux at the tips of roots and accumulation of reactive oxygen species (ROS) and reactive nitrogen (RNS) in roots, resulting in physiological stress. We focus on the root system, as the first point of contact with Fe in soil, and describe the key processes engaged in Fe transport, distribution, binding, and other mechanisms that are drawn upon to defend against high-Fe stress. We describe the root-system regulation of key physiological processes and of morphological development through signaling substances such as ethylene, auxin, reactive oxygen species, and nitric oxide, and discuss gene-expression responses under high Fe. We especially focus on studies on the physiological and molecular mechanisms in rice and Arabidopsis under high Fe, hoping to provide a valuable theoretical basis for improving the ability of crop roots to adapt to soil Fe toxicity.
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Affiliation(s)
- Guangjie Li
- State Key Laboratory of Nutrient Use and Management, Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Jinan, 250100, China.
| | - Jinlin Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of the Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Herbert J Kronzucker
- School of BioSciences, The University of Melbourne, Parkville, VIC, 3010, Australia.
| | - Baohai Li
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, 528000, China; University of the Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing, 100049, China.
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de Souza MA, de Andrade LIF, Gago J, Pereira EG. Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 342:112031. [PMID: 38346562 DOI: 10.1016/j.plantsci.2024.112031] [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: 09/18/2023] [Revised: 12/28/2023] [Accepted: 02/09/2024] [Indexed: 02/22/2024]
Abstract
Considering the current climate change scenario, the development of heat-tolerant rice cultivars (Oryza sativa L.) is paramount for cultivation in waterlogged systems affected by iron (Fe) excess. The objective of this work was to investigate the physiological basis of tolerance to excess Fe in rice cultivars that would maintain photosynthetic efficiency at higher temperatures. In an experimental approach, two rice cultivars (IRGA424 - tolerant and IRGA417- susceptible to Fe toxicity) were exposed to two concentrations of FeSO4-EDTA, control (0.019 mM) and excess Fe (7 mM) and subsequent exposition to heatwaves at different temperatures (25 °C - control, 35, 40, 45, 50, and 55 °C). The increase in temperatures resulted in a higher Fe concentration in shoots accompanied by a lower Rubisco carboxylation rate in both cultivars, but with lower damage in the tolerant one. Stomatal limitation only occurred as a late response to Fe toxicity, especially in the sensitive cultivar. The activation of photorespiration as electron sink under Fe excess with increasing temperature during heatwaves appear as a major mechanism to alleviate oxidative stress in cultivars tolerant to excess Fe. The tolerance to iron toxicity and heat stress is associated with increased photoprotective mechanisms driving non-photochemical dissipation.
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Affiliation(s)
- Moises Alves de Souza
- Setor de Fisiologia Vegetal, Departamento de Biologia, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil.
| | | | - Jorge Gago
- Instituto de investigaciones Agroambientales y de la Economía del Agua (INAGEA), Universitat deles Illes Balears, Palma de Mallorca, Spain
| | - Eduardo Gusmão Pereira
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Viçosa, Rodovia LMG 818, km 06, Campus UFV-Florestal, Florestal, Minas Gerais, Brazil.
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6
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Azad M, Tohidfar M, Ghanbari Moheb Seraj R, Mehralian M, Esmaeilzadeh-Salestani K. Identification of responsive genes to multiple abiotic stresses in rice (Oryza sativa): a meta-analysis of transcriptomics data. Sci Rep 2024; 14:5463. [PMID: 38561340 PMCID: PMC10985071 DOI: 10.1038/s41598-024-54623-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 02/14/2024] [Indexed: 04/04/2024] Open
Abstract
Abiotic stresses limit the quantity and quality of rice grain production, which is considered a strategic crop in many countries. In this study, a meta-analysis of different microarray data at seedling stage was performed to investigate the effects of multiple abiotic stresses (drought, salinity, cold situation, high temperature, alkali condition, iron, aluminum, and heavy metal toxicity, nitrogen, phosphorus, and potassium deficiency) on rice. Comparative analysis between multiple abiotic stress groups and their control groups indicated 561 differentially expressed genes (DEGs), among which 422 and 139 genes were up-regulated and down-regulated, respectively. Gene Ontology analysis showed that the process of responding to stresses and stimuli was significantly enriched. In addition, pathways such as metabolic process and biosynthesis of secondary metabolites were identified by KEGG pathway analysis. Weighted correlation network analysis (WGCNA) uncovered 17 distinct co-expression modules. Six modules were significantly associated with genes involved in response to abiotic stresses. Finally, to validate the results of the meta-analysis, five genes, including TIFY9 (JAZ5), RAB16B, ADF3, Os01g0124650, and Os05g0142900 selected for qRT-PCR analysis. Expression patterns of selected genes confirmed the results of the meta-analysis. The outcome of this study could help introduce candidate genes that may be beneficial for use in genetic engineering programs to produce more tolerant crops or as markers for selection.
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Affiliation(s)
- Mahnaz Azad
- Department of Cell & Molecular Biology, Faculty of Life Sciences & Biotechnology, Shahid Beheshti University, Tehran, 19839-69411, Iran
| | - Masoud Tohidfar
- Department of Cell & Molecular Biology, Faculty of Life Sciences & Biotechnology, Shahid Beheshti University, Tehran, 19839-69411, Iran.
| | - Rahele Ghanbari Moheb Seraj
- Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Mohammad Mehralian
- Department of Agriculture, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, 19839-69411, Iran
| | - Keyvan Esmaeilzadeh-Salestani
- Chair of Crop Science and Plant Biology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51006, Tartu, Estonia
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7
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Peracchi LM, Panahabadi R, Barros-Rios J, Bartley LE, Sanguinet KA. Grass lignin: biosynthesis, biological roles, and industrial applications. FRONTIERS IN PLANT SCIENCE 2024; 15:1343097. [PMID: 38463570 PMCID: PMC10921064 DOI: 10.3389/fpls.2024.1343097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/06/2024] [Indexed: 03/12/2024]
Abstract
Lignin is a phenolic heteropolymer found in most terrestrial plants that contributes an essential role in plant growth, abiotic stress tolerance, and biotic stress resistance. Recent research in grass lignin biosynthesis has found differences compared to dicots such as Arabidopsis thaliana. For example, the prolific incorporation of hydroxycinnamic acids into grass secondary cell walls improve the structural integrity of vascular and structural elements via covalent crosslinking. Conversely, fundamental monolignol chemistry conserves the mechanisms of monolignol translocation and polymerization across the plant phylum. Emerging evidence suggests grass lignin compositions contribute to abiotic stress tolerance, and periods of biotic stress often alter cereal lignin compositions to hinder pathogenesis. This same recalcitrance also inhibits industrial valorization of plant biomass, making lignin alterations and reductions a prolific field of research. This review presents an update of grass lignin biosynthesis, translocation, and polymerization, highlights how lignified grass cell walls contribute to plant development and stress responses, and briefly addresses genetic engineering strategies that may benefit industrial applications.
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Affiliation(s)
- Luigi M. Peracchi
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States
| | - Rahele Panahabadi
- Institute of Biological Chemistry, Washington State University, Pullman, WA, United States
| | - Jaime Barros-Rios
- Division of Plant Sciences and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, United States
| | - Laura E. Bartley
- Institute of Biological Chemistry, Washington State University, Pullman, WA, United States
| | - Karen A. Sanguinet
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States
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8
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Shekhawat PK, Sardar S, Yadav B, Salvi P, Soni P, Ram H. Meta-analysis of transcriptomics studies identifies novel attributes and set of genes involved in iron homeostasis in rice. Funct Integr Genomics 2023; 23:336. [PMID: 37968542 DOI: 10.1007/s10142-023-01265-z] [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: 07/31/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 11/17/2023]
Abstract
Iron (Fe) is an important micronutrient for humans as well as for plant growth and development. Rice employs multiple mechanisms to counteract the negative effects of Fe deficiency and Fe toxicity. Previously, many transcriptomics studies have identified hundreds of genes affected by Fe deficiency and/or Fe toxicity. These studies are highly valuable to identify novel genes involved in Fe homeostasis. However, in the absence of their systematic integration, they remain underutilized. A systematic meta-analysis of transcriptomics data from such ten previous studies was performed here to identify various common attributes. From this meta-analysis, it is revealed that under Fe deficiency conditions, root transcriptome is more sensitive and exhibits greater similarity across multiple studies than the shoot transcriptome. Furthermore, under Fe toxicity conditions, upregulated genes are more reliable and consistent than downregulated genes in susceptible cultivars. The integration of data from Fe deficiency and Fe toxicity conditions helped to identify key marker genes for Fe stress. As a proof-of-concept of the analysis, among the genes consistently regulated in opposite directions under Fe deficiency and toxicity conditions, two genes were selected: a proton-dependent oligopeptide transporter (POT) family protein and Vacuolar Iron Transporter (VIT)-Like (VTL) gene, and validated their expression and sub-cellular localization. Since VIT genes are known to play an important role in Fe homeostasis in plants, the entire OsVTL gene family in rice was characterized. This meta-analysis has identified many novel candidate genes that exhibit consistent expression patterns across multiple tissues, conditions, and studies. This makes them potential targets for future research aimed at developing Fe-biofortified rice varieties, as well as varieties tolerant to sub-optimal Fe levels in soil.
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Affiliation(s)
- Pooja Kanwar Shekhawat
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110067, India
- Department of Botany, University of Rajasthan, JLN Marg, Jaipur, 302004, India
| | - Shaswati Sardar
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110067, India
| | - Banita Yadav
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110067, India
| | - Prafull Salvi
- National Agri-Food Biotechnology Institute, Sector-81, SAS Nagar Mohali, India
| | - Praveen Soni
- Department of Botany, University of Rajasthan, JLN Marg, Jaipur, 302004, India.
| | - Hasthi Ram
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110067, India.
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9
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Kermeur N, Pédrot M, Cabello-Hurtado F. Iron Availability and Homeostasis in Plants: A Review of Responses, Adaptive Mechanisms, and Signaling. Methods Mol Biol 2023; 2642:49-81. [PMID: 36944872 DOI: 10.1007/978-1-0716-3044-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Iron is an essential element for all living organisms, playing a major role in plant biochemistry as a redox catalyst based on iron redox properties. Iron is the fourth most abundant element of the Earth's crust, but its uptake by plants is complex because it is often in insoluble forms that are not easily accessible for plants to use. The physical and chemical speciation of iron, as well as rhizosphere activity, are key factors controlling the bioavailability of Fe. Iron can be under reduced (Fe2+) or oxidized (Fe3+) ionic forms, adsorbed onto mineral surfaces, forming complexes with organic molecules, precipitated to form poorly crystalline hydroxides to highly crystalline iron oxides, or included in crystalline Fe-rich mineral phases. Plants must thus adapt to a complex and changing iron environment, and their response is finely regulated by multiple signaling pathways initiated by a diversity of stimulus perceptions. Higher plants possess two separate strategies to uptake iron from rhizosphere soil: the chelation strategy and the reduction strategy in grass and non-grass plants, respectively. Molecular actors involved in iron uptake and mobilization through the plant have been characterized for both strategies. All these processes that contribute to iron homeostasis in plants are highly regulated in response to iron availability by downstream signaling responses, some of which are characteristic signaling signatures of iron dynamics, while others are shared with other environmental stimuli. Recent research has thus revealed key transcription factors, cis-acting elements, post-translational regulators, and other molecular mechanisms controlling these genes or their encoded proteins in response to iron availability. In addition, the most recent research is increasingly highlighting the crosstalk between iron homeostasis and nutrient response regulation. These regulatory processes help to avoid plant iron concentrations building up to potential cell functioning disruptions that could adversely affect plant fitness. Indeed, when iron is in excess in the plant, it can lead to the production and accumulation of dangerous reactive oxygen species and free radicals (H2O2, HO•, O2•-, HO•2) that can cause considerable damages to most cellular components. To cope with iron oxidative stress, plants have developed defense systems involving the complementary action of antioxidant enzymes and molecular antioxidants, safe iron-storage mechanisms, and appropriate morphological adaptations.
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Affiliation(s)
- Nolenn Kermeur
- University of Rennes, CNRS, Ecobio, UMR 6553, Rennes, France
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
| | - Mathieu Pédrot
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
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10
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Pappas D, Giannoutsou E, Panteris E, Gkelis S, Adamakis IDS. Microcystin-LR and cyanobacterial extracts alter the distribution of cell wall matrix components in rice root cells. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 191:78-88. [PMID: 36195035 DOI: 10.1016/j.plaphy.2022.09.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 09/16/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Cyanobacterial toxins (known as cyanotoxins) disrupt the plant cytoskeleton (i.e. microtubules and F-actin), which is implicated in the regulation of cell wall architecture. Therefore, cyanotoxins are also expected to affect cell wall structure and composition. However, the effects of cyanobacterial toxicity on plant cell wall have not been yet thoroughly studied. Accordingly, the alterations of cell wall matrix after treatments with pure microcystin-LR (MC-LR), or cell extracts of one MC-producing and one non-MC-producing Microcystis strain were studied in differentiated Oryza sativa (rice) root cells. Semi-thin transverse sections of variously treated LR-White-embedded roots underwent immunostaining for various cell wall epitopes, including homogalacturonans (HGs), arabinogalactan-proteins (AGPs), and hemicelluloses. Homogalacturonan and arabinan distribution patterns were altered in the affected roots, while a pectin methylesterase (PME) activity assay revealed that PMEs were also affected. Elevated intracellular Ca2+ levels, along with increased callose and mixed linkage glucans (MLGs) deposition, were also observed after treatment. Xyloglucans appeared unaffected and lignification was not observed. The exact mechanism of cyanobacterial toxicity against the cell wall is to be further investigated.
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Affiliation(s)
- Dimitris Pappas
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 541 24, Greece
| | - Eleni Giannoutsou
- Section of Botany, Department of Biology, National and Kapodistrian University of Athens, Athens, 157 84, Greece
| | - Emmanuel Panteris
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 541 24, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 541 24, Greece
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11
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Morina F, Küpper H. Trace metals at the frontline of pathogen defence responses in non-hyperaccumulating plants. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:6516-6524. [PMID: 35876626 DOI: 10.1093/jxb/erac316] [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: 05/27/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
Metal hyperaccumulation is an exclusive evolutionary trait contributing to efficient plant defence against biotic stress. The defence can be based on direct metal toxicity or the joint effects of accumulated metal and organic compounds, the latter being based on integrated signalling networks. While the role of metals in biotic stress defence of hyperaccumulators has been intensively studied, their role in the pathogen immunity of non-accumulator plants is far less understood. New findings show that in metal non-hyperaccumulating plants, localized hot spots of zinc, manganese, and iron increase plant immunity, while manipulation of nutrient availability may be used for priming against subsequent pathogen attack. Recent findings on the role of metals in plant-pathogen interactions are discussed considering the narrow line between deficiency and toxicity, host-pathogen nutrient competition and synergistic effects of simultaneous metal and biotic stress. We discuss the suitability of the direct-defence and joint-effects hypotheses in non-hyperaccumulating plants, and the involvement of metals as active centres of immunity-related enzymes. We also consider future challenges in revealing the mechanisms underlying metal-mediated plant immunity.
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Affiliation(s)
- Filis Morina
- Czech Academy of Sciences, Biology Centre, Institute of Plant Molecular Biology, Department of Plant Biophysics & Biochemistry, Branišovská, České Budějovice, Czech Republic
| | - Hendrik Küpper
- Czech Academy of Sciences, Biology Centre, Institute of Plant Molecular Biology, Department of Plant Biophysics & Biochemistry, Branišovská, České Budějovice, Czech Republic
- University of South Bohemia, Department of Experimental Plant Biology, Branišovská, České Budějovice, Czech Republic
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Kaur G, Shukla V, Meena V, Kumar A, Tyagi D, Singh J, Kandoth PK, Mantri S, Rouached H, Pandey AK. Physiological and molecular responses to combinatorial iron and phosphate deficiencies in hexaploid wheat seedlings. Genomics 2021; 113:3935-3950. [PMID: 34606916 DOI: 10.1016/j.ygeno.2021.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 01/16/2023]
Abstract
Iron (Fe) and phosphorus (P) are the essential mineral nutrients for plant growth and development. However, the molecular interaction of the Fe and P pathways in crops remained largely obscure. In this study, we provide a comprehensive physiological and molecular analysis of hexaploid wheat response to single (Fe, P) and its combinatorial deficiencies. Our data showed that inhibition of the primary root growth occurs in response to Fe deficiency; however, growth was rescued when combinatorial deficiencies occurred. Analysis of RNAseq revealed that distinct molecular rearrangements during combined deficiencies with predominance for genes related to metabolic pathways and secondary metabolite biosynthesis primarily include genes for UDP-glycosyltransferase, cytochrome-P450s, and glutathione metabolism. Interestingly, the Fe-responsive cis-regulatory elements in the roots in Fe stress conditions were enriched compared to the combined stress. Our metabolome data also revealed the accumulation of distinct metabolites such as amino-isobutyric acid, arabinonic acid, and aconitic acid in the combined stress environment. Overall, these results are essential in developing new strategies to improve the resilience of crops in limited nutrients.
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Affiliation(s)
- Gazaldeep Kaur
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India; Department of Biotechnology, Panjab University, Punjab, India
| | - Vishnu Shukla
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Varsha Meena
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Anil Kumar
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India; Department of Biotechnology, Panjab University, Punjab, India
| | - Deepshikha Tyagi
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Jagtar Singh
- Department of Biotechnology, Panjab University, Punjab, India
| | - Pramod Kaitheri Kandoth
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Shrikant Mantri
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Hatem Rouached
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, United States of America; Plant Resilience Institute, Michigan State University, East Lansing, MI 48824, United States of America
| | - Ajay Kumar Pandey
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Sector 81, Knowledge City, Mohali 140306, Punjab, India.
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13
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Shetty R, Vidya CSN, Vaculík M. Comparison of the single and combined effects of arsenic and antimony on growth and physiology of giant reed (Arundo donax L.). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:55476-55485. [PMID: 34138437 DOI: 10.1007/s11356-021-14870-x] [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: 11/20/2020] [Accepted: 06/09/2021] [Indexed: 06/12/2023]
Abstract
Fast-growing plant, giant reed (Arundo donax L.) has been gaining a lot of popularity in the phytoremediation of metal-polluted soils. However, information regarding the physiological background of tolerance and accumulation capacity of A. donax with respect to antimony (Sb), arsenic (As), and their co-contamination are very limited. Rooted stem cuttings were grown for 5 months in hydroponics exposed to Sb (10 mg L-1), As (10 mg L-1), and their combined toxicity (Sb 5 mg L-1 + As 5 mg L-1) wherein treatment without As/Sb served as control. Effect of these treatments on key photosynthetic parameters (rate of net photosynthesis, effective quantum yield of photosystem II, chlorophyll fluorescence, and photosynthetic pigments), phytoextraction ability of metalloids, nutrient uptake, root growth, and lignification were analyzed. Arsenic-containing treatments severely affected root morphology of A. donax compared to Sb/control and plants exposed to As showed intensive lignification already in young apical part of the root in the present study. Shoot concentration was found to be 11.35±0.75 Sb mg kg-1 and 8.97±0.52 As mg kg-1 compared to root concentration of 1028.3±19.1 Sb mg kg-1 and 705.3±69.9 As mg kg-1 in the treatments of Sb and As. Even though Sb and As were translocated to the shoots in relatively small amount, both metalloids significantly decreased the shoot and root growth of A. donax and negatively affected the photosynthetic parameters. Moreover, co-contamination of Sb and As proved to be severely toxic to growth and physiology of A. donax even though the magnitudes of the metalloids used were lower than those of Sb/As alone treatments. In conclusion, Sb and As caused a marked reduction in growth and physiological characteristics of A. donax, opposing its use in phytoremediation of highly contaminated soils. Tolerance capacity of plants to simultaneous presence of As and Sb in the environment is crucial for the successful implementation of phytoremediation since the co-contamination by As and Sb might reduce the efficiency of phytoremediation when using this fast-growing and high biomass-producing plant species.
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Affiliation(s)
- Rajpal Shetty
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina B2, Ilkovičova 6, SK-842 15, Bratislava, Slovakia.
| | - Chirappurathu Sukumaran-Nair Vidya
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23, Bratislava, Slovakia
| | - Marek Vaculík
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina B2, Ilkovičova 6, SK-842 15, Bratislava, Slovakia
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23, Bratislava, Slovakia
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14
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Kar S, Mai HJ, Khalouf H, Ben Abdallah H, Flachbart S, Fink-Straube C, Bräutigam A, Xiong G, Shang L, Panda SK, Bauer P. Comparative Transcriptomics of Lowland Rice Varieties Uncovers Novel Candidate Genes for Adaptive Iron Excess Tolerance. PLANT & CELL PHYSIOLOGY 2021; 62:624-640. [PMID: 33561287 PMCID: PMC8462385 DOI: 10.1093/pcp/pcab018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 01/29/2021] [Indexed: 05/19/2023]
Abstract
Iron (Fe) toxicity is a major challenge for plant cultivation in acidic waterlogged soil environments, where lowland rice is a major staple food crop. Only few studies have addressed the molecular characterization of excess Fe tolerance in rice, and these highlight different mechanisms for Fe tolerance. Out of 16 lowland rice varieties, we identified a pair of contrasting lines, Fe-tolerant Lachit and -susceptible Hacha. The two lines differed in their physiological and morphological responses to excess Fe, including leaf growth, leaf rolling, reactive oxygen species generation and Fe and metal contents. These responses were likely due to genetic origin as they were mirrored by differential gene expression patterns, obtained through RNA sequencing, and corresponding gene ontology term enrichment in tolerant vs. susceptible lines. Thirty-five genes of the metal homeostasis category, mainly root expressed, showed differential transcriptomic profiles suggestive of an induced tolerance mechanism. Twenty-two out of these 35 metal homeostasis genes were present in selection sweep genomic regions, in breeding signatures, and/or differentiated during rice domestication. These findings suggest that Fe excess tolerance is an important trait in the domestication of lowland rice, and the identified genes may further serve to design the targeted Fe tolerance breeding of rice crops.
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Affiliation(s)
- Saradia Kar
- Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, India
| | - Hans-Jörg Mai
- Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
| | - Hadeel Khalouf
- Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
| | - Heithem Ben Abdallah
- Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
| | - Samantha Flachbart
- Institute of Plant Biochemistry, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
| | | | - Andrea Bräutigam
- Faculty of Biology, Bielefeld University, Universitätsstr. 27, Bielefeld 33615, Germany
| | - Guosheng Xiong
- Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Lianguang Shang
- Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Sanjib Kumar Panda
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, India
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan 305817, India
| | - Petra Bauer
- Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf 40225, Germany
- Cluster of Excellence on Plant Science (CEPLAS), Heinrich Heine University, Düsseldorf, Germany
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15
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Wang Q, Jin Q, Ma Y, Zhang S, Zhang L, Liu Z, Zhang Y. Iron toxicity-induced regulation of key secondary metabolic processes associated with the quality and resistance of Panax ginseng and Panax quinquefolius. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 224:112648. [PMID: 34450425 DOI: 10.1016/j.ecoenv.2021.112648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/07/2021] [Accepted: 08/11/2021] [Indexed: 05/27/2023]
Abstract
Panax ginseng and Panax quinquefolius can survive for long periods of time in iron toxicity-stressed environments, which cause rusty roots and reduced productivity. To reveal the proteomic changes in these two Panax species in response to iron toxicity stress, plants of these two species were divided into a control group and an iron toxicity-stress group. An isobaric tags for relative and absolute quantitation (iTRAQ) proteomics approach was used to explore the changes in protein accumulation and the potential mechanisms underlying the response to iron toxicity stress in the two Panax species. Proteomic analyses revealed approximately 725 differentially expressed proteins (DEPs) in the iron toxicity-stress and control groups, including 233 and 492 proteins whose expression was upregulated and downregulated, respectively. The expression of DEPs related to photosynthesis was significantly downregulated, and DEPs whose expression was significantly upregulated were associated with redox reactions. Many upregulated DEPs were also involved in pathways such as those involving phenylpropanoid, flavonoid, isoflavone and ginsenoside synthesis. The abundance of some ginsenoside monomers (Rg1 and Rb3) also significantly increased in P. ginseng and P. quinquefolius. Moreover, P. quinquefolius contained 455 DEPs whose expression was higher than that in P. ginseng, including many proteins related to the regulation of ion homeostasis, indicating that P. quinquefolius is more resistant to iron toxicity stress than P. ginseng is.
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Affiliation(s)
- Qiuxia Wang
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China.
| | - Qiao Jin
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China
| | - Yingying Ma
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China
| | - Shuna Zhang
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China
| | - Linlin Zhang
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China
| | - Zhengbo Liu
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China
| | - Yayu Zhang
- Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China; College of Pharmacy and biological Engineering, Chengdu University, Chengdu 610106, China.
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16
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Gong B, He E, Romero-Freire A, Ruan J, Yang W, Zhang P, Qiu H. Do essential elements (P and Fe) have mitigation roles in the toxicity of individual and binary mixture of yttrium and cerium to Triticum aestivum? JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125761. [PMID: 33819642 DOI: 10.1016/j.jhazmat.2021.125761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/10/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
Essential elements can affect the bioavailability, uptake, and toxicity of metals. However, hardly any research has focused on the roles of essential elements on the toxicity of rare earth metals. Here we examined how P and Fe modified the individual and binary toxicity of Y and Ce to Triticum aestivum, respectively. Standard root elongation tests were used to quantify the toxicity of both single and binary mixtures at three levels of P addition (1, 5, and 10 μM) and Fe addition (0.1, 1, and 5 mM). Our results showed that both P and Fe can alleviate individual toxicity of Y or Ce irrespective of the dose indicators as suggested by the enhanced EC50 values. Both P and Fe might mitigate Y/Ce toxicity by limiting Y/Ce uptake into roots and improving nutritional status of wheats, whereas P can also decrease free Y/Ce ion activities in the exposure media. As for the mixture toxicity of Y and Ce, only improved P, but not Fe can exhibit approximately additive mixture toxicity, which can be adequately predicted by the simple Concentration Addition model. Our results suggested the important roles of P and Fe in assessing Y and Ce toxicity accurately.
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Affiliation(s)
- Bing Gong
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Erkai He
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China.
| | - Ana Romero-Freire
- Department of Soil Science, University of Granada, Avd. Fuente Nueva, Granada 18002, Spain
| | - Jujun Ruan
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China; School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenjun Yang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China; School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Peihua Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Qiu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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17
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Kaewcheenchai R, Vejchasarn P, Hanada K, Shirai K, Jantasuriyarat C, Juntawong P. Genome-Wide Association Study of Local Thai Indica Rice Seedlings Exposed to Excessive Iron. PLANTS 2021; 10:plants10040798. [PMID: 33921675 PMCID: PMC8073664 DOI: 10.3390/plants10040798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/11/2021] [Accepted: 04/15/2021] [Indexed: 11/16/2022]
Abstract
Excess soluble iron in acidic soil is an unfavorable environment that can reduce rice production. To better understand the tolerance mechanism and identify genetic loci associated with iron toxicity (FT) tolerance in a highly diverse indica Thai rice population, a genome-wide association study (GWAS) was performed using genotyping by sequencing and six phenotypic data (leaf bronzing score (LBS), chlorophyll content, shoot height, root length, shoot biomass, and root dry weight) under both normal and FT conditions. LBS showed a high negative correlation with the ratio of chlorophyll content and shoot biomass, indicating the FT-tolerant accessions can regulate cellular homeostasis when encountering stress. Sixteen significant single nucleotide polymorphisms (SNPs) were identified by association mapping. Validation of candidate SNP using other FT-tolerant accessions revealed that SNP:2_21262165 might be associated with tolerance to FT; therefore, it could be used for SNP marker development. Among the candidate genes controlling FT tolerance, RAR1 encodes an innate immune responsive protein that links to cellular redox homeostasis via interacting with abiotic stress-responsive Hsp90. Future research may apply the knowledge obtained from this study in the molecular breeding program to develop FT-tolerant rice varieties.
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Affiliation(s)
- Reunreudee Kaewcheenchai
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (R.K.); (C.J.)
- Rice Department, Chatuchak Bangkok, 10900, Thailand;
| | | | - Kousuke Hanada
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka 820-8502, Japan; (K.H.); (K.S.)
| | - Kazumasa Shirai
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka 820-8502, Japan; (K.H.); (K.S.)
| | - Chatchawan Jantasuriyarat
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (R.K.); (C.J.)
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Piyada Juntawong
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (R.K.); (C.J.)
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
- Correspondence:
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18
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Wairich A, de Oliveira BHN, Wu LB, Murugaiyan V, Margis-Pinheiro M, Fett JP, Ricachenevsky FK, Frei M. Chromosomal introgressions from Oryza meridionalis into domesticated rice Oryza sativa result in iron tolerance. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:2242-2259. [PMID: 33035327 DOI: 10.1093/jxb/eraa461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 10/03/2020] [Indexed: 05/07/2023]
Abstract
Iron (Fe) toxicity is one of the most common mineral disorders affecting rice (Oryza sativa) production in flooded lowland fields. Oryza meridionalis is indigenous to northern Australia and grows in regions with Fe-rich soils, making it a candidate for use in adaptive breeding. With the aim of understanding tolerance mechanisms in rice, we screened a population of interspecific introgression lines from a cross between O. sativa and O. meridionalis for the identification of quantitative trait loci (QTLs) contributing to Fe-toxicity tolerance. Six putative QTLs were identified. A line carrying one introgression from O. meridionalis on chromosome 9 associated with one QTL was highly tolerant despite very high shoot Fe concentrations. Physiological, biochemical, ionomic, and transcriptomic analyses showed that the tolerance of the introgression lines could partly be explained by higher relative Fe retention in the leaf sheath and culm. We constructed the interspecific hybrid genome in silico for transcriptomic analysis and identified differentially regulated introgressed genes from O. meridionalis that could be involved in shoot-based Fe tolerance, such as metallothioneins, glutathione S-transferases, and transporters from the ABC and MFS families. This work demonstrates that introgressions of O. meridionalis into the O. sativa genome can confer increased tolerance to excess Fe.
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Affiliation(s)
- Andriele Wairich
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Ben Hur Neves de Oliveira
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Lin-Bo Wu
- Institute for Crop Science and Resource Conservation (INRES), University of Bonn, 53115 Bonn, Germany
- Institute for Molecular Physiology, Heinrich Heine University of Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Varunseelan Murugaiyan
- Institute for Crop Science and Resource Conservation (INRES), University of Bonn, 53115 Bonn, Germany
- Rice Breeding Platform, International Rice Research Institute (IRRI), Los Baños, Philippines
| | - Marcia Margis-Pinheiro
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Janette Palma Fett
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Felipe Klein Ricachenevsky
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Michael Frei
- Institute for Crop Science and Resource Conservation (INRES), University of Bonn, 53115 Bonn, Germany
- Institute of Agronomy and Crop Physiology, Justus-Liebig-University, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
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19
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Regon P, Dey S, Chowardhara B, Saha B, Kar S, Tanti B, Panda SK. Physio-biochemical and molecular assessment of Iron (Fe 2+) toxicity responses in contrasting indigenous aromatic Joha rice cultivars of Assam, India. PROTOPLASMA 2021; 258:289-299. [PMID: 33070240 DOI: 10.1007/s00709-020-01574-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 10/13/2020] [Indexed: 05/26/2023]
Abstract
Iron (Fe) toxicity is one of the major abiotic stresses which limits the yield of lowland rice. This study aims to investigate the physiological, biochemical, and molecular aspects of two contrasting aromatic Joha rice, viz., Keteki and Kola Joha of Assam. Oxidative damage caused due to Fe2+ toxicity was quantitatively determined. Fe2+ toxicity in the growth medium increases the level of ROS and anti-oxidative enzyme activity. Along with the aforementioned damage caused due to Fe2+ toxicity, chlorophyll content decreases in both the rice varieties. Detection of Fe3+ and Fe2+ was also conducted by Perls' Prussian and Turnbull blue method, respectively. In addition, spectrophotometric quantification of Fe2+ was determined by 2, 2'-Bipyridyl (Bpy). Above 2.5 mM, Fe2+ toxicity was found to be lethal in rice seedlings affecting their total growth and biomass. Gene expression analysis of iron-regulated transporter 1 (OsIRT1), Yellow Stripe-Like 15 (OsYSL15), and ferritin 1 (OsFer1) revealed the differential gene expression over a time period of Fe2+ toxicity. Our study suggested that the different parameters which are considered here can be helpful for the better understanding of how aromatic Joha rice performed under Fe2+ toxicity which can also help to reveal broader aspects that how gene players are involved in the iron homeostasis mechanism in Joha rice in coming future.
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Affiliation(s)
- Preetom Regon
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, 788011, India
| | - Sangita Dey
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, 788011, India
| | - Bhaben Chowardhara
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, 788011, India
| | - Bedabrata Saha
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, 752050, India
| | - Saradia Kar
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, 788011, India
| | - Bhaben Tanti
- Department of Botany, Gauhati University, Guwahati, Assam, 781014, India
| | - Sanjib Kumar Panda
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, 788011, India.
- Department of Biochemistry, Central University of Rajasthan, Ajmer, 305817, India.
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20
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de Oliveira BHN, Wairich A, Turchetto-Zolet AC, Fett JP, Ricachenevsky FK. The Mitochondrial Iron-Regulated (MIR) gene is Oryza genus specific and evolved before speciation within the Oryza sativa complex. PLANTA 2020; 251:94. [PMID: 32253515 DOI: 10.1007/s00425-020-03386-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 03/28/2020] [Indexed: 05/07/2023]
Abstract
The MIR gene is not an Oryza sativa orphan gene, but an Oryza genus-specific gene that evolved before AA lineage speciation by a complex origination process. Rice (Oryza sativa L.) is a model species and an economically relevant crop. The Oryza genus comprises 25 species, with genomic data available for several Oryza species, making it a model for genetics and evolution. The Mitochondrial Iron-Regulated (MIR) gene was previously implicated in the O. sativa Fe deficiency response, and was considered an orphan gene present only in rice. Here we show that MIR is also found in other Oryza species that belong to the Oryza sativa complex, which have AA genome type and constitute the primary gene pool for O. sativa breeding. Our data suggest that MIR originated in a stepwise process, in which sequences derived from an exon fragment of the raffinose synthase gene were pseudogenized into non-coding, which in turn originated the MIR gene de novo. All species with a putative functional MIR gene conserve their regulation by Fe deficiency, with the exception of Oryza barthii. In O. barthii, the MIR coding sequence was translocated to a different chromosomal position and separated from its regulatory region, leading to a lack of Fe deficiency responsiveness. Moreover, the MIR co-expression subnetwork cluster in O. sativa is responsive to Fe deficiency, evidencing the importance of the newly originated gene in Fe uptake. This work establishes that MIR is not an orphan gene as previously proposed, but a de novo originated gene within the genus Oryza. We also showed that MIR is undergoing genomic changes in one species (O. barthii), with an impact on Fe deficiency response.
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Affiliation(s)
- Ben Hur Neves de Oliveira
- Centro de Biotecnologia e Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.421 CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil
| | - Andriele Wairich
- Centro de Biotecnologia e Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.421 CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil
| | - Andreia Carina Turchetto-Zolet
- Departamento de Genética e Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.323, CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil
| | - Janette Palma Fett
- Centro de Biotecnologia e Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.421 CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil
- Departamento de Botânica, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.423, CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil
| | - Felipe Klein Ricachenevsky
- Centro de Biotecnologia e Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.421 CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil.
- Departamento de Botânica, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves 9500, Building 43.423, CEP, Porto Alegre, Rio Grande do Sul, 91509-900, Brazil.
- Departamento de Biologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Building 16, Room 3254, CEP, Santa Maria, Rio Grande do Sul, 97105-900, Brazil.
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