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Kouas S, Djedidi S, Ben Slimene Debez I, Sbissi I, Alyami NM, Hirsch AM. Halotolerant phosphate solubilizing bacteria isolated from arid area in Tunisia improve P status and photosynthetic activity of cultivated barley under P shortage. Heliyon 2024; 10:e38653. [PMID: 39397981 PMCID: PMC11470655 DOI: 10.1016/j.heliyon.2024.e38653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 09/20/2024] [Accepted: 09/26/2024] [Indexed: 10/15/2024] Open
Abstract
Forty-seven (47) bacterial strains were isolated from soil of Gabes (an arid region in southern Tunisia) and were screened for their ability to produce Indole-3-Acetic Acid (IAA) and to solubilize phosphate (P). The characterization and molecular identification of the most successful P-solubilizing bacteria (PSB) were then carried out. When grown on suitable artificial media, the most salt-tolerant strains also showed the highest P solubilization capacity (up to 126.8 μg ml-1 of released phosphorus after 7 day incubation) and the strongest ability to produce IAA (up to 101.86 μg ml-1 after 3 day incubation). Overall, bacterial isolates displayed a different tolerance to varying pH, temperatures, and salinity. The molecular identification revealed that 11 strains belonged to three genera: Bacillus, Pseudomonas and Mesorhizobium. Inoculation of barley with P-solubilizing bacteria under tricalcium phosphate-induced P shortage significantly improved plant growth (biomass, shoot height, and root length) together with increasing total chlorophyll contents and photosynthetic activity. This was concomitant with (i) higher P uptake and translocation and (ii) increased phosphorus absorption and utilization efficiencies (PAE and PUE), which is indicative of a better plant P nutrition under P scarcity. Taken together, we provide strong arguments showing that bacteria native to extreme environments display PSB potential making them promising candidates to mitigate low Pi availability for crop plants.
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Affiliation(s)
- Saber Kouas
- Laboratory of Plant Physiology and Functional Genomics, Institute of Biotechnology, University of Sfax, BP “1175”, 3038, Sfax, Tunisia
- Faculty of Sciences of Gabes, University of Gabes, Zrig, 6072, Gabes, Tunisia
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwai-cho, Fuchushi, Tokyo, 183–8509, Japan
| | - Imen Ben Slimene Debez
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria (CBBC), BP 901, Hammam-Lif, 2050, Tunisia
| | - Imed Sbissi
- Pastoral Ecosystems and Valorization of Spontaneous Plants and Associated Microorganisms Laboratory, Arid Regions Institute, University of Gabes, 4100, Medenine, Tunisia
| | - Nouf M. Alyami
- Department of Zoology, College of Science, King Saud University, PO Box-2455, Riyadh, 11451, Saudi Arabia
| | - Ann M. Hirsch
- Department of Molecular, Cell, and Developmental Biology and Molecular Biology Institute, University of California, Los Angeles, CA, USA, 90095, USA
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2
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Li G, Gao Q, Nyande A, Dong Z, Khan EH, Han Y, Wu H. Cerium oxide nanoparticles promoted lateral root formation in Arabidopsis by modulating reactive oxygen species and Ca 2+ level. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:FP24196. [PMID: 39365897 DOI: 10.1071/fp24196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Accepted: 09/18/2024] [Indexed: 10/06/2024]
Abstract
Roots play an important role in plant growth, including providing essential mechanical support, water uptake, and nutrient absorption. Nanomaterials play a positive role in improving plant root development, but there is limited knowledge of how nanomaterials affect lateral root (LR) formation. Poly (acrylic) acid coated nanoceria (cerium oxide nanoparticles, PNC) are commonly used to improve plant stress tolerance due to their ability to scavenge reactive oxygen species (ROS). However, its impact on LR formation remains unclear. In this study, we investigated the effects of PNC on LR formation in Arabidopsis thaliana by monitoring ROS levels and Ca2+ distribution in roots. Our results demonstrate that PNC significantly promote LR formation, increasing LR numbers by 26.2%. Compared to controls, PNC-treated Arabidopsis seedlings exhibited reduced H2 O2 levels by 18.9% in primary roots (PRs) and 40.6% in LRs, as well as decreased O 2 · - levels by 47.7% in PRs and 88.5% in LRs. When compared with control plants, Ca2+ levels were reduced by 35.7% in PRs and 22.7% in LRs of PNC-treated plants. Overall, these results indicate that PNC could enhance LR development by modulating ROS and Ca2+ levels in roots.
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Affiliation(s)
- Guangjing Li
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Quanlong Gao
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Ashadu Nyande
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Zihao Dong
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Ehtisham Hassan Khan
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Yuqian Han
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Honghong Wu
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; and Hubei Hongshan Laboratory, Wuhan 430070, China; and Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Shenzhen 511464, China; and Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 511464, China
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3
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Shi X, Yang T, Ren M, Fu J, Bai J, Cui H. AT-hook motif nuclear localized transcription factors function redundantly in promoting root growth through modulation of redox homeostasis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 120:199-217. [PMID: 39136690 DOI: 10.1111/tpj.16981] [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: 09/06/2023] [Revised: 06/18/2024] [Accepted: 07/31/2024] [Indexed: 09/27/2024]
Abstract
Maintaining an optimal redox status is essential for plant growth and development, particularly when the plants are under stress. AT-hook motif nuclear localized (AHL) proteins are evolutionarily conserved transcription factors in plants. Much of our understanding about this gene family has been derived from studies on clade A members. To elucidate the functions of clade B genes, we first analyzed their spatial expression patterns using transgenic plants expressing a nuclear localized GFP under the control of their promoter sequences. AHL1, 2, 6, 7, and 10 were further functionally characterized owing to their high expression in the root apical meristem. Through mutant analyses and transgenic studies, we showed that these genes have the ability to promote root growth. Using yeast one-hybrid and dual luciferase assays, we demonstrated that AHL1, 2, 6, 7, and 10 are transcription regulators and this activity is required for their roles in root growth. Although mutants for these genes did not showed obvious defects in root growth, transgenic plants expressing their fusion proteins with the SRDX repressor motif exhibited a short-root phenotype. Through transcriptome analysis, histochemical staining and molecular genetics experiments, we found that AHL10 maintains redox homeostasis via direct regulation of glutathione transferase (GST) genes. When the transcript level of GSTF2, a top-ranked target of AHL10, was reduced by RNAi, the short-root phenotype in the AHL10-SRDX expressing plant was largely rescued. These results together suggest that AHL genes function redundantly in promoting root growth through direct regulation of redox homeostasis.
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Affiliation(s)
- Xiaowen Shi
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Ting Yang
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Mengfei Ren
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jing Fu
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Juan Bai
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Hongchang Cui
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
- Department of Biological Science, Florida State University, Tallahassee, Florida, 32306, USA
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4
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Zhang X, Wang X, Deng F, Liu Y, Ru L, Yan G, Xu Y, Zhu Z, He Y. Sly-miR398b Mediates Mature Leaf Flattening by Orchestrating Auxin and H 2O 2 Signalling in Tomato. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39248305 DOI: 10.1111/pce.15150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/07/2024] [Accepted: 08/28/2024] [Indexed: 09/10/2024]
Abstract
Leaf flattening plays a pivotal role in optimizing light capture and enhancing photosynthesis efficiency. While extensive research has clarified the molecular mechanisms governing the initial stages of leaf flattening, understanding the maintenance of this process in mature leaves remains limited. Our investigation focused on sly-miR398b in tomatoes and revealed its crucial role in maintaining leaf flattening. In situ hybridization experiments indicated predominant expression of sly-miR398b in the abaxial side. Disrupting sly-miR398b using CRISPR/Cas9 relieved its suppression on target gene (Cu/Zn-SOD, SlCSD1), elevating SlCSD1 levels specifically on the abaxial side. Consequently, this asymmetrical expression of SlCSD1 increased hydrogen peroxide (H2O2) levels in the abaxial side, hindering auxin influx genes while promoting auxin efflux gene expression. This shift reduced auxin response gene expression in the abaxial side of mature leaves compared to the adaxial side, leading to leaf epinasty in sly-miR398b mutants. Exogenous H2O2 spraying induced leaf epinasty, downregulating SlGH3.5 and upregulating SlPIN3 and SlPIN4. Remarkably, spraying with 1-naphthalacetic acid (NAA) restored leaf flattening in sly-miR398b mutants. Our findings offer novel insights into mature leaf flattening maintenance via sly-miR398b's regulation of auxin and H2O2 signalling pathways.
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Affiliation(s)
- Xinshan Zhang
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Xiujuan Wang
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Fei Deng
- Department of Computer Science and Technology, College of Mathematics and Computer Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Yuanyuan Liu
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
| | - Lei Ru
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
| | - Guochao Yan
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
| | - Yunmin Xu
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
| | - Zhujun Zhu
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
| | - Yong He
- Discipline of Facility Horticulture, College of Horticulture Science, Zhejiang A&F University, Hangzhou, Zhejiang, China
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable of Ministry of Agriculture and Rural Affairs, Hangzhou, Zhejiang, China
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5
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Zhang J, Yang J, Yin Y. Germination Promotes Flavonoid Accumulation of Finger Millet ( Eleusine coracana L.): Response Surface Optimization and Investigation of Accumulation Mechanism. PLANTS (BASEL, SWITZERLAND) 2024; 13:2191. [PMID: 39204627 PMCID: PMC11360649 DOI: 10.3390/plants13162191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 08/06/2024] [Accepted: 08/06/2024] [Indexed: 09/04/2024]
Abstract
Germination is an effective measure to regulate the accumulation of secondary metabolites in plants. In this study, we optimized the germination conditions of finger millet by response surface methodology. Meanwhile, physiological characteristics and gene expression were measured to investigate the mechanism of flavonoid accumulation in finger millet at the germination stage. The results showed that when germination time was 5.7 d, germination temperature was 31.2 °C, and light duration was 17.5 h, the flavonoid content of millet sprouts was the highest (7.0 μg/sprout). The activities and relative gene expression of key enzymes for flavonoid synthesis (phenylalanine ammonia-lyase, 4-coumarate-coenzyme a ligase, and cinnamate 4-hydroxylase) were significantly higher in finger millet sprouts germinated at 3 and 5 d compared with that in ungerminated seeds (p < 0.05). In addition, germination enhanced the activities of four antioxidant enzymes (catalase, peroxidase, superoxide dismutase, and ascorbate peroxidase) and up-regulated the gene expression of PAL and APX. Germination increased malondialdehyde content in sprouts, which resulted in cell damage. Subsequently, the antioxidant capacity of the sprouts was enhanced through the activation of antioxidant enzymes and the up-regulation of their gene expression, as well as the synthesis of active substances, including flavonoids, total phenolics, and anthocyanins. This process served to alleviate germination-induced cellular injury. These findings provide a research basis for the regulation of finger millet germination and the enhancement of its nutritional and functional properties.
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Affiliation(s)
- Jing Zhang
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225009, China;
| | - Jia Yang
- Yangzhou Center for Food and Drug Control, Yangzhou 225000, China
| | - Yongqi Yin
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225009, China;
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6
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Zaidi S, Hayat S, Pichtel J. Arsenic-induced plant stress: Mitigation strategies and omics approaches to alleviate toxicity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 213:108811. [PMID: 38870680 DOI: 10.1016/j.plaphy.2024.108811] [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: 04/15/2024] [Revised: 05/31/2024] [Accepted: 06/07/2024] [Indexed: 06/15/2024]
Abstract
Arsenic (As) is a metalloid pollutant that is extensively distributed in the biosphere. As is among the most prevalent and toxic elements in the environment; it induces adverse effects even at low concentrations. Due to its toxic nature and bioavailability, the presence of As in soil and water has prompted numerous agricultural, environmental, and health concerns. As accumulation is detrimental to plant growth, development, and productivity. Toxicity of As to plants is a function of As speciation, plant species, and soil properties. As inhibits root proliferation and reduces leaf number. It is associated with defoliation, reduced biomass, nutrient uptake, and photosynthesis, chlorophyll degradation, generation of reactive oxygen species, membrane damage, electrolyte leakage, lipid peroxidation and genotoxicity. Plants respond to As stress by upregulating genes involved in detoxification. Different species have adopted avoidance and tolerance responses for As detoxification. Plants also activate phytohormonal signaling to mitigate the stressful impacts of As. This review addresses As speciation, uptake, and accumulation by plants. It describes plant morpho-physiological, biochemical, and molecular changes and how phytohormones respond to As stress. The review closes with a discussion of omic approaches for alleviating As toxicity in plants.
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Affiliation(s)
- Sameen Zaidi
- Department of Botany, Plant Physiology Section, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Shamsul Hayat
- Department of Botany, Plant Physiology Section, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India.
| | - John Pichtel
- Environment, Geology, and Natural Resources, Ball State University, Muncie, IN, 47306-0495, USA
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7
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Markova O, Garipova S, Chistoedova A, Matyunina V, Lubyanova A, Lastochkina O, Garipov A, Shpirnaya I, Pusenkova L. Predicting Field Effectiveness of Endophytic Bacillus subtilis Inoculants for Common Bean Using Morphometric and Biochemical Markers. PLANTS (BASEL, SWITZERLAND) 2024; 13:1769. [PMID: 38999609 PMCID: PMC11244252 DOI: 10.3390/plants13131769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/15/2024] [Accepted: 06/22/2024] [Indexed: 07/14/2024]
Abstract
According to four field experiments, after the inoculation of Phaseolus vulgaris L. cultivar Ufimskaya with the commercial strain Bacillus subtilis 26D and the promising strain B. subtilis 10-4, it was found that inoculation with B. subtilis 10-4 improved seed productivity (SP) by 31-41% per plant, but only in dry years. In contrast, all 4 years of inoculation with B. subtilis 26D were ineffective or neutral. It was intended to determine the growing and biochemical characteristics of inoculated 7-day-old plants, which correlate with the field SP of bacterial preparations. The SP of inoculated plants (average of 4 years) correlated with root length (0.83), MDA content (-0.98), and catalase (CAT) activity in roots (-0.96) of week-old seedlings. High correlation coefficients between the H2O2 content in the roots and SP (0.89 and 0.77), as well as between the H2O2 content in shoots and SP (0.98 and 0.56), were observed only in two dry years, when the influence of bacteria was detected. These physiological indicators were identified as potential markers for predicting the effectiveness of the endophytic symbiosis between bean plants and B. subtilis strains. The findings may be used to develop effective microbial-based, eco-friendly technologies for bean production.
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Affiliation(s)
- Oksana Markova
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Svetlana Garipova
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Aelita Chistoedova
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Viktoriia Matyunina
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Alsu Lubyanova
- Institute of Biochemistry and Genetics-Subdivision of the Ufa Federal Research Center of the Russian Academy of Sciences, Pr. Oktyabrya 71, 450054 Ufa, Russia
| | - Oksana Lastochkina
- Institute of Biochemistry and Genetics-Subdivision of the Ufa Federal Research Center of the Russian Academy of Sciences, Pr. Oktyabrya 71, 450054 Ufa, Russia
| | - Arsenii Garipov
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Irina Shpirnaya
- Institute of Nature and Human, Ufa University of Science and Technology, Zaki Validy Str. 32, 450076 Ufa, Russia
| | - Lyudmila Pusenkova
- Bashkir Research Institute of Agriculture-Subdivision of the Ufa Federal Research Center of the Russian Academy of Sciences, R. Zorge Str. 19, 450059 Ufa, Russia
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8
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Liu H, Mu Y, Xuan Y, Wu X, Wang W, Zhang H. Hydrogen Peroxide Signaling in the Maintenance of Plant Root Apical Meristem Activity. Antioxidants (Basel) 2024; 13:554. [PMID: 38790659 PMCID: PMC11118955 DOI: 10.3390/antiox13050554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/23/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
Hydrogen peroxide (H2O2) is a prevalent reactive oxygen species (ROS) found in cells and takes a central role in plant development and stress adaptation. The root apical meristem (RAM) has evolved strong plasticity to adapt to complex and changing environmental conditions. Recent advances have made great progress in explaining the mechanism of key factors, such as auxin, WUSCHEL-RELATED HOMEOBOX 5 (WOX5), PLETHORA (PLT), SHORTROOT (SHR), and SCARECROW (SCR), in the regulation of RAM activity maintenance. H2O2 functions as an emerging signaling molecule to control the quiescent center (QC) specification and stem cell niche (SCN) activity. Auxin is a key signal for the regulation of RAM maintenance, which largely depends on the formation of auxin regional gradients. H2O2 regulates the auxin gradients by the modulation of intercellular transport. H2O2 also modulates the expression of WOX5, PLTs, SHR, and SCR to maintain RAM activity. The present review is dedicated to summarizing the key factors in the regulation of RAM activity and discussing the signaling transduction of H2O2 in the maintenance of RAM activity. H2O2 is a significant signal for plant development and environmental adaptation.
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Affiliation(s)
| | | | | | | | - Wei Wang
- National Key Laboratory of Wheat and Maize Crop Science, College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China; (H.L.); (Y.M.); (Y.X.); (X.W.)
| | - Hui Zhang
- National Key Laboratory of Wheat and Maize Crop Science, College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China; (H.L.); (Y.M.); (Y.X.); (X.W.)
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9
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Bahmani R, Kim D, Modareszadeh M, Hwang S. Ethylene and ROS mediate root growth inhibition induced by the endocrine disruptor bisphenol A (BPA). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 205:108212. [PMID: 38008009 DOI: 10.1016/j.plaphy.2023.108212] [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: 08/21/2023] [Revised: 11/12/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Bisphenol A (BPA) functions as a detrimental substance that disrupts the endocrine system in animals while also impeding the growth and development of plants. In our previous study, we demonstrated that BPA hinders the growth of roots in Arabidopsis by diminishing cell division and elongation, which is ascribed to the increased accumulation and redistribution of auxin. Here, we examined the mediation of ROS and ethylene in BPA-induced auxin accumulation and root growth inhibition. BPA enhanced ROS levels, and ROS increased auxin contents but reduced cell division activity and the expression of EXPA8 involved in root elongation. ROS scavenger treatment reversed BPA-triggered root growth retardation, auxin accumulation, and cell division inhibition. In addition, BPA induced ethylene, and ethylene synthesis inhibitor treatment reversed BPA-triggered root growth retardation and auxin accumulation. Taken together, ROS and ethylene are involved in BPA-inhibited cell elongation and cell division by mediating auxin accumulation and redistribution.
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Affiliation(s)
- Ramin Bahmani
- Department of Molecular Biology, South Korea; Department of Bioindustry and Bioresource Engineering, South Korea; Plant Engineering Research Institute, Sejong University, Seoul, 143-747, South Korea
| | - DongGwan Kim
- Department of Molecular Biology, South Korea; Department of Bioindustry and Bioresource Engineering, South Korea; Plant Engineering Research Institute, Sejong University, Seoul, 143-747, South Korea
| | - Mahsa Modareszadeh
- Department of Molecular Biology, South Korea; Department of Bioindustry and Bioresource Engineering, South Korea; Plant Engineering Research Institute, Sejong University, Seoul, 143-747, South Korea
| | - Seongbin Hwang
- Department of Molecular Biology, South Korea; Department of Bioindustry and Bioresource Engineering, South Korea; Plant Engineering Research Institute, Sejong University, Seoul, 143-747, South Korea.
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10
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Qin Q. ROS: Important factor in plant stem cell fate regulation. JOURNAL OF PLANT PHYSIOLOGY 2023; 289:154082. [PMID: 37690340 DOI: 10.1016/j.jplph.2023.154082] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/12/2023]
Abstract
Reactive oxygen species (ROS) are initially considered to be toxic byproducts of aerobic metabolic reactions. However, increasing evidence has shown that they have emerged as signaling molecules involved in several basic biological processes. Recent studies highlight the pivotal role of ROS in the maintenance of shoot and root stem cell niche. In this review, we discuss the impact of ROS distribution and their gradients on the stability of the stem cell niches (SCN) in shoot apical meristem (SAM) and root apical meristem (RAM) by determining the balance between stemness and differentiation. We also summarize several important transcription factors that are involved in the regulation of ROS balance in SAM and RAM, regulating key enzymes in ROS metabolism, especially SOD and peroxidase. ROS are also tightly interconnected with phytohormones in the control of the stem cell fate. Besides, ROS are also important regulators of the cell cycle in controlling the size of the stem cells. Understanding the regulation mechanisms of ROS production, polarization gradient distribution, homeostasis, and downstream signal transduction in cells will open exciting new perspectives for plant developmental biology.
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Affiliation(s)
- Qianqian Qin
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Key Laboratory of Gene Editing for Breeding, Gansu Province, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
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11
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Fan S, Amombo E, Yin Y, Wang G, Avoga S, Wu N, Li Y. Root system architecture and genomic plasticity to salinity provide insights into salt-tolerant traits in tall fescue. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 262:115315. [PMID: 37542983 DOI: 10.1016/j.ecoenv.2023.115315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 07/25/2023] [Accepted: 07/30/2023] [Indexed: 08/07/2023]
Abstract
Salinity is detrimental to soil health, plant growth, and crop productivity. Understanding salt tolerance mechanisms offers the potential to introduce superior crops, especially in coastal regions. Root system architecture (RSA) plasticity is vital for plant salt stress adaptation. Tall fescue is a promising forage grass in saline regions with scarce RSA studies. Here, we used the computer-integrated and -automated programs EZ-Rhizo II and ROOT-Vis II to analyze and identify natural RSA variations and adaptability to high salt stress at physiological and genetic levels in 17 global tall fescue accessions. Total root length rather than the number of lateral roots contribute more to water uptake and could be used to separate salt-tolerant (LS-11) and -sensitive accessions (PI531230). Comparative evaluation of LS-11 and PI531230 demonstrated that the lateral root length rather than the main root contributed more towards the total root length in LS-11. Also, high water uptake was associated with a larger lateral root vector and position while low water intake was associated with an insignificant correlation between root length, vector, and position. To examine candidate gene expression, we performed transcriptome and transcription analyses using high-throughput RNA sequencing and real-time quantitative PCR, respectively of the lateral and main roots. The main root displayed more differentially expressed genes than the lateral root. A Poisson comparison of LS-11 vs PI531230 demonstrated significant upregulation of PLASMA MEMBRANE AQUAPORIN 1 and AUXIN RESPONSE FACTOR 22 in both the main and lateral root, which are associated with transmembrane water transport and the auxin-activated signaling system, respectively. There is also an upregulation of BASIC HELIX-LOOP-HELIX 5 in the main root and a downregulation in the lateral root, which is ascribed to sodium ion transmembrane transport, as well as an upregulation of THE MEDIATOR COMPLEX 1 assigned to water transport in the lateral root and a downregulation in the main root. Gene-protein interaction analysis found that more genes interacting with aquaporins proteins were upregulated in the lateral root than in the main root. We inferred that deeper main roots with longer lateral roots emanating from the bottom of the main root were ideal for tall fescue water uptake and salt tolerance, rather than many shallow roots, and that, while both main lateral roots may play similar roles in salt sensing and water uptake, there are intrinsic genomic differences.
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Affiliation(s)
- Shugao Fan
- School of Resources and Environmental Engineering, Ludong University, Yantai 264000, PR China
| | - Erick Amombo
- African Sustainable Agriculture Research Institute, Mohammed VI Polytechnic University, Laayoune 70000, Morocco
| | - Yanling Yin
- School of Resources and Environmental Engineering, Ludong University, Yantai 264000, PR China
| | - Gunagyang Wang
- School of Resources and Environmental Engineering, Ludong University, Yantai 264000, PR China
| | - Sheila Avoga
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430061, PR China
| | - Nan Wu
- School of Resources and Environmental Engineering, Ludong University, Yantai 264000, PR China.
| | - Yating Li
- School of Resources and Environmental Engineering, Ludong University, Yantai 264000, PR China.
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Yang S, Lee H. Salinity-Triggered Responses in Plant Apical Meristems for Developmental Plasticity. Int J Mol Sci 2023; 24:ijms24076647. [PMID: 37047619 PMCID: PMC10095309 DOI: 10.3390/ijms24076647] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/31/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
Salt stress severely affects plant growth and development. The plant growth and development of a sessile organism are continuously regulated and reformed in response to surrounding environmental stress stimuli, including salinity. In plants, postembryonic development is derived mainly from primary apical meristems of shoots and roots. Therefore, to understand plant tolerance and adaptation under salt stress conditions, it is essential to determine the stress response mechanisms related to growth and development based on the primary apical meristems. This paper reports that the biological roles of microRNAs, redox status, reactive oxygen species (ROS), nitric oxide (NO), and phytohormones, such as auxin and cytokinin, are important for salt tolerance, and are associated with growth and development in apical meristems. Moreover, the mutual relationship between the salt stress response and signaling associated with stem cell homeostasis in meristems is also considered.
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Affiliation(s)
- Soeun Yang
- Department of Biotechnology, Duksung Women’s University, Seoul 03169, Republic of Korea
| | - Horim Lee
- Department of Biotechnology, Duksung Women’s University, Seoul 03169, Republic of Korea
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13
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Parmagnani AS, Kanchiswamy CN, Paponov IA, Bossi S, Malnoy M, Maffei ME. Bacterial Volatiles (mVOC) Emitted by the Phytopathogen Erwinia amylovora Promote Arabidopsis thaliana Growth and Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12030600. [PMID: 36978848 PMCID: PMC10045578 DOI: 10.3390/antiox12030600] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/21/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
Phytopathogens are well known for their devastating activity that causes worldwide significant crop losses. However, their exploitation for crop welfare is relatively unknown. Here, we show that the microbial volatile organic compound (mVOC) profile of the bacterial phytopathogen, Erwinia amylovora, enhances Arabidopsis thaliana shoot and root growth. GC-MS head-space analyses revealed the presence of typical microbial volatiles, including 1-nonanol and 1-dodecanol. E. amylovora mVOCs triggered early signaling events including plasma transmembrane potential Vm depolarization, cytosolic Ca2+ fluctuation, K+-gated channel activity, and reactive oxygen species (ROS) and nitric oxide (NO) burst from few minutes to 16 h upon exposure. These early events were followed by the modulation of the expression of genes involved in plant growth and defense responses and responsive to phytohormones, including abscisic acid, gibberellin, and auxin (including the efflux carriers PIN1 and PIN3). When tested, synthetic 1-nonanol and 1-dodecanol induced root growth and modulated genes coding for ROS. Our results show that E. amylovora mVOCs affect A. thaliana growth through a cascade of early and late signaling events that involve phytohormones and ROS.
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Affiliation(s)
- Ambra S. Parmagnani
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
| | | | - Ivan A. Paponov
- Department of Food Science, Aarhus University, 8200 Aarhus, Denmark
| | - Simone Bossi
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
| | - Mickael Malnoy
- Research and Innovation Centre, Edmund Mach Foundation, Via Edmund Mach 1, 38098 San Michele all’Adige, Italy
| | - Massimo E. Maffei
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
- Correspondence: ; Tel.: +39-011-670-5967
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