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Zhang Z, Guo Y, Marasigan KM, Conner JA, Ozias-Akins P. Gene activation via Cre/lox-mediated excision in cowpea (Vigna unguiculata). Plant Cell Rep 2022; 41:119-138. [PMID: 34591155 PMCID: PMC8803690 DOI: 10.1007/s00299-021-02789-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/15/2021] [Indexed: 05/11/2023]
Abstract
Expression of Cre recombinase by AtRps5apro or AtDD45pro enabled Cre/lox-mediated recombination at an early embryonic developmental stage upon crossing, activating transgenes in the hybrid cowpea and tobacco. Genetic engineering ideally results in precise spatiotemporal control of transgene expression. To activate transgenes exclusively in a hybrid upon fertilization, we evaluated a Cre/lox-mediated gene activation system with the Cre recombinase expressed by either AtRps5a or AtDD45 promoters that showed activity in egg cells and young embryos. In crosses between Cre recombinase lines and transgenic lines harboring a lox-excision reporter cassette with ZsGreen driven by the AtUbq3 promoter after Cre/lox-mediated recombination, we observed complete excision of the lox-flanked intervening DNA sequence between the AtUbq3pro and the ZsGreen coding sequence in F1 progeny upon genotyping but no ZsGreen expression in F1 seeds or seedlings. The incapability to observe ZsGreen fluorescence was attributed to the activity of the AtUbq3pro. Strong ZsGreen expression in F1 seeds was observed after recombination when ZsGreen was driven by the AtUbq10 promoter. Using the AtDD45pro to express Cre resulted in more variation in recombination frequencies between transgenic lines and crosses. Regardless of the promoter used to regulate Cre, mosaic F1 progeny were rare, suggesting gene activation at an early embryo-developmental stage. Observation of ZsGreen-expressing tobacco embryos at the globular stage from crosses with the AtRps5aproCre lines pollinated by the AtUbq3prolox line supported the early activation mode.
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Affiliation(s)
- Zhifen Zhang
- Department of Horticulture and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, 2356 Rainwater Rd, Tifton, GA, 31793, USA
| | - Yinping Guo
- Department of Horticulture and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, 2356 Rainwater Rd, Tifton, GA, 31793, USA
| | - Kathleen Monfero Marasigan
- Department of Horticulture and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, 2356 Rainwater Rd, Tifton, GA, 31793, USA
| | - Joann A Conner
- Department of Horticulture and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, 2356 Rainwater Rd, Tifton, GA, 31793, USA
| | - Peggy Ozias-Akins
- Department of Horticulture and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, 2356 Rainwater Rd, Tifton, GA, 31793, USA.
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Bian Y, Wang B, Liu F, Wang Y, Huang H. Effect of storage states on stability of three organophosphorus insecticide residues on cowpea samples. J Sci Food Agric 2021; 101:6020-6026. [PMID: 33856700 DOI: 10.1002/jsfa.11257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/16/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The stability of pesticide residues in stored samples is very important to ensure the quality of data about the residues. The evaluation of pesticide residues in food and environment samples is an important means to ensure food quality and protect consumers against potential dietary risks. Improper storage of pesticide residue samples may result in loss of pesticide and unreliable data, which could affect safety assessments. RESULTS The influences of storage conditions, including temperature (-20 °C, 4 °C, and ambient temperature) and sample state (homogenized state and coarsely chopped state) on the storage stability of dichlorvos, malathion, and diazinon on cowpea were studied. Dichlorvos and malathion were more stable in an homogenized state than in a coarsely chopped state. At 4 °C, the residual dichlorvos in the coarsely chopped state and the homogenized state, respectively, was 12% and 69%; the residual malathion was 26% and 92%, respectively. Dichlorvos suffered a large loss of 89% and 59% for coarsely chopped and homogenized cowpea, even at -20 °C. It was obvious that the stability of dichlorvos and malathion were more affected by storage state than diazinon. The stability of diazinon was significantly affected by temperature. The effect of storage state and temperature on stability is likely to be correlated with enzymes in the matrix, such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD). CONCLUSION The optimal stable storage conditions for three organophosphorus insecticides residues on cowpea were in the homogenized state and under a lower temperature. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Yanli Bian
- Shandong Academy of Pesticide Sciences Institute of Residue Technology, Shandong Academy of Agricultural Sciences, Jinan, China
- College of Science, China Agricultural University, Beijing, China
| | - Boning Wang
- College of Science, China Agricultural University, Beijing, China
| | - Fengmao Liu
- College of Science, China Agricultural University, Beijing, China
| | - Yihan Wang
- College of Science, China Agricultural University, Beijing, China
| | - Hongwei Huang
- College of Science, China Agricultural University, Beijing, China
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Sonklin C, Alashi AM, Laohakunjit N, Aluko RE. Functional Characterization of Mung Bean Meal Protein-Derived Antioxidant Peptides. Molecules 2021; 26:1515. [PMID: 33802127 PMCID: PMC7999109 DOI: 10.3390/molecules26061515] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/02/2021] [Accepted: 03/08/2021] [Indexed: 11/30/2022] Open
Abstract
The aim of this work was to characterize the antioxidant properties of some of the peptides present in bromelain mung bean meal protein hydrolysate (MMPH). The MMPH was subjected to two rounds of bioassay-guided reversed-phase HPLC separation followed by peptide identification in the most potent fractions using tandem mass spectrometry. Twelve antioxidant peptides, namely, HC, CGN, LAN, CTN, LAF, CSGD, MMGW, QFAAD, ERF, EYW, FLQL, and QFAW were identified and assayed for antioxidant properties. CTN, HC, CGN, and CSGD were the most potent (p < 0.05) DPPH radical scavengers with EC50 values of 0.30, 0.29, 0.28, and 0.30 mg/mL, respectively, which are lower than the 0.03 mg/mL obtained for reduced glutathione (GSH). CTN, HC, CGN, and CSGD exhibited the most potent (p < 0.05) scavenging activities against hydroxyl and superoxide radicals with EC50 values that are similar to those of GSH. The cysteine-containing peptides also had stronger ferric reducing antioxidant power and metal chelation activity than peptides devoid of cysteine. In contrast, MMGW, ERF, and EYW had poor radical scavenging and metal chelation activities. We conclude that the availability of the sulfhydryl group may have enhanced antioxidant potency while the presence of bulky groups such phenylalanine and tryptophan had an opposite effect.
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Affiliation(s)
- Chanikan Sonklin
- Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, 1518 Pracharat 1 Rd., Wongsawang, Bangsue, Bangkok 10800, Thailand;
| | - Adeola M. Alashi
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
| | - Natta Laohakunjit
- School of Bioresources and Technology, King Mongkut’s University of Technology Thonburi, 49 Tein-talay 25 Rd., Tha-kam, Bangkhuntein, Bangkok 10150, Thailand;
| | - Rotimi E. Aluko
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
- Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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Maldonado M, Guo F, Letts JA. Atomic structures of respiratory complex III 2, complex IV, and supercomplex III 2-IV from vascular plants. eLife 2021; 10:e62047. [PMID: 33463523 PMCID: PMC7815315 DOI: 10.7554/elife.62047] [Citation(s) in RCA: 109] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022] Open
Abstract
Mitochondrial complex III (CIII2) and complex IV (CIV), which can associate into a higher-order supercomplex (SC III2+IV), play key roles in respiration. However, structures of these plant complexes remain unknown. We present atomic models of CIII2, CIV, and SC III2+IV from Vigna radiata determined by single-particle cryoEM. The structures reveal plant-specific differences in the MPP domain of CIII2 and define the subunit composition of CIV. Conformational heterogeneity analysis of CIII2 revealed long-range, coordinated movements across the complex, as well as the motion of CIII2's iron-sulfur head domain. The CIV structure suggests that, in plants, proton translocation does not occur via the H channel. The supercomplex interface differs significantly from that in yeast and bacteria in its interacting subunits, angle of approach and limited interactions in the mitochondrial matrix. These structures challenge long-standing assumptions about the plant complexes and generate new mechanistic hypotheses.
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Affiliation(s)
- Maria Maldonado
- Department of Molecular and Cellular Biology, University of California DavisDavisUnited States
| | - Fei Guo
- Department of Molecular and Cellular Biology, University of California DavisDavisUnited States
- BIOEM Facility, University of California DavisDavisUnited States
| | - James A Letts
- Department of Molecular and Cellular Biology, University of California DavisDavisUnited States
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Ogunkunle CO, Gambari H, Agbaje F, Okoro HK, Asogwa NT, Vishwakarma V, Fatoba PO. Effect of Low-Dose Nano Titanium Dioxide Intervention on Cd Uptake and Stress Enzymes Activity in Cd-Stressed Cowpea [Vigna unguiculata (L.) Walp] Plants. Bull Environ Contam Toxicol 2020; 104:619-626. [PMID: 32172338 DOI: 10.1007/s00128-020-02824-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/11/2020] [Indexed: 06/10/2023]
Abstract
Cadmium contamination of agricultural soils is a serious problem due to its toxic effects on health and yield of crop plants. This study investigates the potential of low-dose nano-TiO2 as soil nanoremediation on Cd toxicity in cowpea plants. To achieve this goal, cowpea seeds were germinated on Cd-spiked soils at 10 mg/kg for 14 days and later augmented with 100 mg nTiO2/kg (nTiO2-50 nm and bTiO2-68 nm, respectively). The results showed that chlorophylls were not altered by nano-TiO2 intervention. Cadmium partitioning in roots and leaves was reduced by the applied nano-TiO2 but significantly higher than control. Ascorbate peroxidase and catalase activities in roots and leaves were promoted by nano-TiO2 intervention compared to control and sole Cd, respectively. However, magnitudes of activity of enzyme activities were higher in nTiO2 compared to bTiO2 treatments. The enhanced enzymes activity led to reduced malonaldehyde content in plant tissues. The study concludes that soil application of nano-TiO2 could be a green alternative to ameliorate soil Cd toxicity in cowpea plants.
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Affiliation(s)
- Clement O Ogunkunle
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria.
| | - Hauwa Gambari
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria
| | - Fatimah Agbaje
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria
| | - Hussein K Okoro
- Analytical-Environmental & Material Science Research Group, Department of Industrial Chemistry, University of Ilorin, Ilorin, 240003, Nigeria
| | - Nnameaka T Asogwa
- Research and Innovation Central Research Laboratory, Ilorin, Nigeria
| | - Vinita Vishwakarma
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, 600119, India
| | - Paul O Fatoba
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria
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Matsumoto N, Takenaka Y, Wachananawat B, Kajiura H, Imai T, Ishimizu T. Rhamnogalacturonan I galactosyltransferase: Detection of enzyme activity and its hyperactivation. Plant Physiol Biochem 2019; 142:173-178. [PMID: 31299599 DOI: 10.1016/j.plaphy.2019.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 07/03/2019] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
Rhamnogalacturonan I (RG-I), one of the pectic components of the plant cell wall, is composed of a backbone of repeating disaccharide units of rhamnose and galacturonic acid, and side chains, such as galactans, arabinans, and arabinogalactans. The activity of RG-I galactosyltransferase, which transfers galactosyl residues to rhamnosyl residues in the RG-I backbone, has not been detected until now. Here, we detected galactosyltransferase activity in azuki bean epicotyls using fluorogenic RG-I oligosaccharide acceptors. This enzyme prefers oligosaccharides with a degree of polymerization more than 9. The enzyme activity was detected in the Golgi apparatus, which is the site of pectin synthesis. In vitro hyperactivation of this enzyme was also observed. Moreover, enzyme activity was increased up to 40-fold in the presence of cationic surfactants or polyelectrolytes.
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Affiliation(s)
- Naoki Matsumoto
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Yuto Takenaka
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | | | - Hiroyuki Kajiura
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Tomoya Imai
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, 611-0011, Japan
| | - Takeshi Ishimizu
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan; Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan.
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Sharma S, Singh HP, Batish DR, Kohli RK. Nitric oxide induced modulations in adventitious root growth, lignin content and lignin synthesizing enzymes in the hypocotyls of Vigna radiata. Plant Physiol Biochem 2019; 141:225-230. [PMID: 31185367 DOI: 10.1016/j.plaphy.2019.05.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/28/2019] [Indexed: 05/08/2023]
Abstract
The present study evaluated the role of nitric oxide (NO) in mediating adventitious root (AR) growth, lignification and related enzymatic changes in the hypocotyls of Vigna radiata. To meet the objectives, the changes in AR growth, lignin content, and the activities of enzymes-peroxidases, polyphenol oxidases, and phenylalanine ammonia lyases- with NO donor and its scavenger were monitored. Hypocotyls were cultivated in aqueous solution supplemented with different concentrations of SNP (sodium nitroprusside, NO donor compound) and its scavenging compound (2,4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; cPTIO). Specifically, at low concentrations, SNP induced AR growth, increased the total lignin content and altered the activities of related oxidoreductases- peroxidases, polyphenol oxidases and phenylalanine ammonia lyases- which are involved in lignin biosynthesis pathway. At higher concentrations, a decline in AR growth and lignification was noticed. We analysed the function of NO in AR formation by depleting the endogenous NO using scavenging compound cPTIO. Hypocotyls grown in a medium supplemented with scavenger cPTIO exhibited significant decline in AR growth and the activities of lignin synthesizing enzymes. Application of NO scavenger showed that stimulatory properties on root lignification may be owing to NO itself. In addition, changes in AR growth were significantly correlated with these modified biochemical activities. Our analysis revealed that NO supplementation induces prominent alterations in lignin level during AR formation and this might be due to an alteration in the activity of lignin biosynthetic enzymes, which further affected the polymerization of monolignols and AR growth.
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Affiliation(s)
- Sangeeta Sharma
- Department of Botany, Panjab University, Chandigarh, 160014, India
| | - Harminder Pal Singh
- Department of Environment Studies, Panjab University, Chandigarh, 160014, India.
| | | | - Ravinder Kumar Kohli
- Department of Botany, Panjab University, Chandigarh, 160014, India; Central University of Punjab, Mansa Road, Bathinda, 151001, India
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Majumdar A, Kar RK. Orchestration of Cu-Zn SOD and class III peroxidase with upstream interplay between NADPH oxidase and PM H +-ATPase mediates root growth in Vigna radiata (L.) Wilczek. J Plant Physiol 2019; 232:248-256. [PMID: 30537611 DOI: 10.1016/j.jplph.2018.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Post-germination plant growth depends on the regulation of reactive oxygen species (ROS) metabolism, spatiotemporal pH changes and Ca+2 homeostasis, whose potential integration has been studied during Vigna radiata (L.) Wilczek root growth. The dissipation of proton (H+) gradients across plasma membrane (PM) by CCCP (protonophore) and the inhibition of PM H+-ATPase by sodium orthovanadate repressed SOD (superoxide dismutase; EC 1.15.1.1) activity as revealed by spectrophotometric and native PAGE assay results. Similar results derived from treatment with DPI (NADPH oxidase inhibitor) and Tiron (O2- scavenger) denote a functional synchronization of SOD, PM H+-ATPase and NOX, as the latter two enzymes are substrate sources for SOD (H+ and O2-, respectively) and are involved in a feed-forward loop. After SOD inactivation, a decline in apoplastic H2O2 content was observed in each treatment group, emerging as a possible cause of the diminution of class III peroxidase (Prx; EC 1.11.1.7), which utilizes H2O2 as a substrate. In agreement with the pivotal role of Ca+2 in PM H+-ATPase and NOX activation, Ca+2 homeostasis antagonists, i.e., LaCl3 (Ca+2 channel inhibitor), EGTA (Ca+2 chelator) and LiCl (endosomal Ca+2 release blocker), inhibited both SOD and Prx. Finally, a drastic reduction in apoplastic OH (hydroxyl radical) concentrations (induced by each treatment, leading to Prx inhibition) was observed via fluorometric analysis. A consequential inhibition of root growth observed under each treatment denotes the importance of the orchestrated functioning of PM H+-ATPase, NOX, Cu-Zn SOD and Prx during root growth. A working model demonstrating postulated enzymatic synchronization with an intervening role of Ca+2 is proposed.
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Affiliation(s)
- Arkajo Majumdar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731235, West Bengal, India; Department of Botany, City College, 102/1 Raja Rammohan Sarani, Kolkata, 700009, West Bengal, India
| | - Rup Kumar Kar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731235, West Bengal, India.
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Sahu M, Kar RK. Possible interaction of ROS, antioxidants and ABA to survive osmotic stress upon acclimation in Vigna radiata L. Wilczek seedlings. Plant Physiol Biochem 2018; 132:415-423. [PMID: 30290333 DOI: 10.1016/j.plaphy.2018.09.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/14/2018] [Accepted: 09/27/2018] [Indexed: 05/26/2023]
Abstract
Acclimation is a process of adjustment to gradual environmental change that enables plants to survive further stress by triggering some tolerance mechanism possibly involving ABA, ROS and oxidative metabolism. Here we have studied acclimation responses in terms of the performances with regard to physiological (growth and relative water content) and biochemical (chlorophyll, carotenoids, protein, malondialdehyde, sugar content) attributes, ABA production and stomatal sensitivity to exogenous ABA, extracellular ROS production and activation of antioxidant system. Our study reveals that repeated exposure to short-term mild water stress simulated by polyethylene glycol (PEG-6000) induces acclimation in mung bean (Vigna radiata L. Wilczek) seedlings. Acclimation induced tolerance was associated with reduced leaf size and enhanced root growth, accumulation of soluble sugar as osmoprotectant, maintenance of water potential, lessening of membrane damage as indicated by lower MDA content. Acclimated mung bean seedlings have shown greater degree of tolerance through increased production of and enhanced sensitivity to ABA (as reflected by faster stomatal closure), enhanced production of extracellular O2.- and H2O2 and the elevated activities of antioxidative enzymes to control the oxidative burst. Taken together, the results convey that acclimated seedlings minimize osmotic stress-induced damage through a possible network of ABA, ROS and antioxidants.
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Affiliation(s)
- Moumita Sahu
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731 235, West Bengal, India
| | - Rup Kumar Kar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731 235, West Bengal, India.
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Torabian S, Farhangi-Abriz S, Rathjen J. Biochar and lignite affect H +-ATPase and H +-PPase activities in root tonoplast and nutrient contents of mung bean under salt stress. Plant Physiol Biochem 2018; 129:141-149. [PMID: 29879587 DOI: 10.1016/j.plaphy.2018.05.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 05/01/2023]
Abstract
This research was conducted to evaluate effects of biochar (50 and 100 g kg-1 soil) and lignite (50 and 100 g kg-1 soil) treatments on H+-ATPase and H+-PPase activity of root tonoplast, nutrient content, and performance of mung bean under salt stress. High saline conditions increased H+-ATPase and H+-PPase activities in root tonoplast, sodium (Na) content, reactive oxygen species (H2O2 and O2-) generation, relative electrolyte leakage (REL) and 2,2-Diphenyl-1-picrylhydrazyl (DPPH) activity in root and leaf, but decreased relative water content (RWC), chlorophyll content index, leaf area, potassium (K), calcium (Ca), magnesium (Mg), zinc (Zn) and iron (Fe) content of plant tissues, root and shoot dry weight of mung bean. Lignite and biochar treatments decreased the H+-ATPase and H+-PPase activities of root tonoplast under salt stress. Moreover, these treatments increased the cation exchange capacity of soil and nutrient values in plant tissues. Biochar and lignite diminished the generation of reactive oxygen species and DPPH activity in root and leaf cells, and these superior effects improved chlorophyll content index, leaf area and growth of mung bean under both conditions. In general, the results of this study demonstrated that biochar and lignite decreased the entry of Na ion into the cells, enriched plant cells with nutrients, and consequently improved mung bean performance under salt toxicity.
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Affiliation(s)
- Shahram Torabian
- School of Agriculture Food and Wine, The University of Adelaide, Waite Campus, Glen Osmond, South Australia, 5064, Australia.
| | - Salar Farhangi-Abriz
- Department of Plant Eco-Physiology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
| | - Judith Rathjen
- School of Agriculture Food and Wine, The University of Adelaide, Waite Campus, Glen Osmond, South Australia, 5064, Australia.
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11
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Okamoto-Nakazato A. Implications of the galactosidase activity of yieldin in the regulatory mechanism of yield threshold that is fundamental to cell wall extension. Physiol Plant 2018; 163:259-266. [PMID: 29286539 DOI: 10.1111/ppl.12687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 12/16/2017] [Accepted: 12/20/2017] [Indexed: 06/07/2023]
Abstract
To understand the action mechanism of yieldin (YLD) on the regulation of the yield threshold (Y), one of the critical parameters of cell wall extension, YLD was extracted from the cell walls of cowpea (Vigna unguiculata L.) hypocotyls and the hemagglutinin activity (HA) as well as the glycosidase activity of the protein was measured. Sedimentation assays using trypsinated rabbit erythrocytes showed that YLD possessed HA at pH 7. The digestion assays using 4-nitrophenyl (pNP) glycopyranosides as artificial substrates showed that YLD liberated galactose residues from pNP alpha-d-galactopyranoside mainly at pH 4.0, i.e. the pH level where Y was decreased at most. These results show that YLD is a bifunctional protein that switches between the HA and the galactosidase activities depending on the surrounding pH. Since D-galactose at concentration of 0.03 g l-1 perfectly inhibited the HA, YLD was suggested to associate with galactose residues. However, the galactose application ten times concentrated was necessary to inhibit both the galactosidase activity of YLD and the acid-induced shift of Y regulated by YLD. In addition, the specific inhibitor of alpha-d-galactosidase (deoxygalactonojirimycin) inhibited both the galactosidase activity of YLD and the shift of Y at the same concentration, but not the HA. On the basis of these results, it is suggested the galactosidase activity of YLD plays a central role in the mechanism of Y-regulation at acidic pH.
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Affiliation(s)
- Akane Okamoto-Nakazato
- Educational Laboratory of Fundamental Biology for Pharmacology, Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
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Laursen T, Stonebloom SH, Pidatala VR, Birdseye DS, Clausen MH, Mortimer JC, Scheller HV. Bifunctional glycosyltransferases catalyze both extension and termination of pectic galactan oligosaccharides. Plant J 2018; 94:340-351. [PMID: 29418030 DOI: 10.1111/tpj.13860] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/23/2018] [Accepted: 01/31/2018] [Indexed: 05/18/2023]
Abstract
Pectins are the most complex polysaccharides of the plant cell wall. Based on the number of methylations, acetylations and glycosidic linkages present in their structures, it is estimated that up to 67 transferase activities are involved in pectin biosynthesis. Pectic galactans constitute a major part of pectin in the form of side-chains of rhamnogalacturonan-I. In Arabidopsis, galactan synthase 1 (GALS1) catalyzes the addition of galactose units from UDP-Gal to growing β-1,4-galactan chains. However, the mechanisms for obtaining varying degrees of polymerization remain poorly understood. In this study, we show that AtGALS1 is bifunctional, catalyzing both the transfer of galactose from UDP-α-d-Gal and the transfer of an arabinopyranose from UDP-β-l-Arap to galactan chains. The two substrates share a similar structure, but UDP-α-d-Gal is the preferred substrate, with a 10-fold higher affinity. Transfer of Arap to galactan prevents further addition of galactose residues, resulting in a lower degree of polymerization. We show that this dual activity occurs both in vitro and in vivo. The herein described bifunctionality of AtGALS1 may suggest that plants can produce the incredible structural diversity of polysaccharides without a dedicated glycosyltransferase for each glycosidic linkage.
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Affiliation(s)
- Tomas Laursen
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
| | - Solomon H Stonebloom
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
| | - Venkataramana R Pidatala
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
| | - Devon S Birdseye
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
| | - Mads H Clausen
- Department of Chemistry, Center for Nanomedicine and Theranostics, Technical University of Denmark, DK-2800, Kongens Lyngby, Denmark
| | - Jenny C Mortimer
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
| | - Henrik Vibe Scheller
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94702, USA
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
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13
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Mahawar L, Kumar R, Shekhawat GS. Evaluation of heme oxygenase 1 (HO 1) in Cd and Ni induced cytotoxicity and crosstalk with ROS quenching enzymes in two to four leaf stage seedlings of Vigna radiata. Protoplasma 2018; 255:527-545. [PMID: 28924722 DOI: 10.1007/s00709-017-1166-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 09/04/2017] [Indexed: 05/08/2023]
Abstract
Research on heme oxygenase in plants has received consideration in recent years due to its several roles in development, defense, and metabolism during various environmental stresses. In the current investigation, the role of heme oxygenase (HO) 1 was evaluated in reducing heavy metal (Cd and Ni) uptake and alleviating Cd and Ni toxicity effects in the hydroponically grown seedlings of Vigna radiata var. PDM 54. Seedlings were subjected to Cd- and Ni-induced oxidative stress independently at different concentrations ranging from 10 to 100 μM. After 96 h (fourth day) of treatment, the stressed plants were harvested to study the cellular homeostasis and detoxification mechanism by examining the growth, stress parameters (LPX, H2O2 content), and non-enzymatic and enzymatic parameters (ascorbate peroxidase (APX), guaicol peroxidase (GPX), and catalase (CAT)) including HO 1. At 50 μM CdCl2 and 60 μM NiSO4, HO 1 activity was found to be highest in leaves which were 1.39 and 1.16-fold, respectively. The greatest HO 1 activity was reflected from the reduction of H2O2 content at these metal concentrations (50 μM CdCl2 and 60 μM NiSO4) which is correlated with the increasing activity of other antioxidant enzymes (CAT, APX). Thus, HO 1 works within a group that generates the defense machinery for the plant's survival by scavenging ROS which is confirmed by a time-dependent study. Hence, it is concluded that seedlings of V. radiata were more tolerant towards metal-induced oxidative stress in which HO 1 is localized in its residential area (plastids).
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Affiliation(s)
- Lovely Mahawar
- Department of Botany, Jai Narain Vyas University, Jodhpur, Rajasthan, 342001, India
| | - Rajesh Kumar
- Water Quality Management Group Defense Laboratory, Jodhpur, 342001, India
| | - Gyan Singh Shekhawat
- Department of Botany, Jai Narain Vyas University, Jodhpur, Rajasthan, 342001, India.
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Arhab Y, Rahier R, Noiriel A, Cherrier MV, Abousalham A. Expression and Purification of Recombinant Vigna unguiculata Phospholipase D in Pichia pastoris for Structural Studies. Methods Mol Biol 2018; 1835:191-201. [PMID: 30109653 DOI: 10.1007/978-1-4939-8672-9_10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The production of pure enzymes in high quantities is a proven strategy to study the catalytic mechanism as well as the solving of structure at the atomic scale for therapeutic or industrial purposes. Phospholipase D (PLD, EC 3.1.4.4) is found in a wide majority of living organisms and has been shown to be involved in signal transduction, vesicle trafficking, and membrane metabolism processes. Located at the membrane-cytoplasm interface, plant PLDs are soluble but also bear an evident hydrophobic aspect making challenging its expression and its purification in large quantity. So far there is no high-resolution three-dimensional structure for a eukaryotic PLD. The protocols herein describe the cloning of the eukaryotic recombinant PLDα of Vigna unguiculata (cowpea) into the yeast expression system Pichia pastoris and its two-step purification process. This allowed us to purify to homogeneity hundreds of micrograms of highly pure protein to conduct in fine structural studies.
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Affiliation(s)
- Yani Arhab
- Univ Lyon, Université Lyon 1, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, UMR 5246 CNRS, Métabolisme, Enzymes et Mécanismes Moléculaires (MEM²), Villeurbanne Cedex, 69622, France
| | - Renaud Rahier
- Univ Lyon, Université Lyon 1, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, UMR 5246 CNRS, Métabolisme, Enzymes et Mécanismes Moléculaires (MEM²), Villeurbanne Cedex, 69622, France
| | - Alexandre Noiriel
- Univ Lyon, Université Lyon 1, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, UMR 5246 CNRS, Métabolisme, Enzymes et Mécanismes Moléculaires (MEM²), Villeurbanne Cedex, 69622, France
| | - Mickael V Cherrier
- UMR 5086 Molecular Microbiology and Structural Biochemistry, Université de Lyon-CNRS, Institut de Biologie et Chimie des Protéines, Lyon Cedex 07, France
- Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Abdelkarim Abousalham
- Univ Lyon, Université Lyon 1, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, UMR 5246 CNRS, Métabolisme, Enzymes et Mécanismes Moléculaires (MEM²), Villeurbanne Cedex, 69622, France.
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15
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Hu D, Tang C, Li C, Kan T, Shi X, Feng L, Wu M. Stereoselective Hydrolysis of Epoxides by reVrEH3, a Novel Vigna radiata Epoxide Hydrolase with High Enantioselectivity or High and Complementary Regioselectivity. J Agric Food Chem 2017; 65:9861-9870. [PMID: 29058432 DOI: 10.1021/acs.jafc.7b03804] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To provide more options for the stereoselective hydrolysis of epoxides, an epoxide hydrolase (VrEH3) gene from Vigna radiata was cloned and expressed in Escherichia coli. Recombinant VrEH3 displayed the maximum activity at pH 7.0 and 45 °C and high stability at pH 4.5-7.5 and 55 °C. Notably, reVrEH3 exhibited high and complementary regioselectivity toward styrene oxides 1a-3a and high enantioselectivity (E = 48.7) toward o-cresyl glycidyl ether 9a. To elucidate these interesting phenomena, the interactions of the three-dimensional structure between VrEH3 and enantiomers of 1a and 9a were analyzed by molecular docking simulation. Using E. coli/vreh3 whole cells, gram-scale preparations of (R)-1b and (R)-9a were performed by enantioconvergent hydrolysis of 100 mM rac-1a and kinetic resolution of 200 mM rac-9a in the buffer-free water system at 25 °C. These afforded (R)-1b with >99% eep and 78.7% overall yield after recrystallization and (R)-9a with >99% ees, 38.7% overall yield, and 12.7 g/L/h space-time yield.
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Affiliation(s)
| | - Cunduo Tang
- Nanyang Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University , Henan 473061, China
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16
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Patel A, Dey N, Chaudhuri S, Pal A. Molecular and biochemical characterization of a Vigna mungo MAP kinase associated with Mungbean Yellow Mosaic India Virus infection and deciphering its role in restricting the virus multiplication. Plant Sci 2017; 262:127-140. [PMID: 28716408 DOI: 10.1016/j.plantsci.2017.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/13/2017] [Accepted: 06/14/2017] [Indexed: 06/07/2023]
Abstract
Yellow Mosaic Disease caused by the begomovirus Mungbean Yellow Mosaic India Virus (MYMIV) severely affects many economically important legumes. Recent investigations in Vigna mungo - MYMIV incompatible interaction identified a MAPK homolog in the defense signaling pathway. An important branch of immunity involves phosphorylation by evolutionary conserved Mitogen-activated protein kinases (MAPK) that transduce signals of pathogen invasion to downstream molecules leading to diverse immune responses. However, most of the knowledge of MAPKs is derived from model crops, and functions of these versatile kinases are little explored in legumes. Here we report characterization of a MAP kinase (VmMAPK1), which was induced upon MYMIV-inoculation in resistant V. mungo. Phylogenetic analysis revealed that VmMAPK1 is closely related to other plant-stress-responsive MAPKs. Both mRNA and protein of VmMAPK1 were accumulated upon MYMIV infection. The VmMAPK1 protein localized in the nucleus as well as cytoplasm and possessed phosphorylation activity in vitro. A detailed biochemical characterization of purified recombinant VmMAPK1 demonstrated an intramolecular mechanism of autophosphorylation and self-catalyzed phosphate incorporation on both threonine and tyrosine residues. The Vmax and Km values of recombinant VmMAPK1 for ATP were 6.292nmol/mg/min and 0.7978μM, respectively. Furthermore, the ability of VmMAPK1 to restrict MYMIV multiplication was validated by its ectopic expression in transgenic tobacco. Importantly, overexpression of VmMAPK1 resulted in the considerable upregulation of defense-responsive marker PR genes. Thus, the present data suggests the critical role of VmMAPK1 in suppressing MYMIV multiplication presumably through SA-mediated signaling pathway and inducing PR genes establishing the significant implications in understanding MAP kinase gene function during Vigna-MYMIV interaction; and hence paves the way for introgression of resistance in leguminous crops susceptible to MYMIV.
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Affiliation(s)
- Anju Patel
- Division of Plant Biology, Bose Institute, P 1/12 CIT Scheme VIIM, Kolkata 700054, India
| | - Nrisingha Dey
- Division of Gene Function and Regulation, Institute of Life Sciences, Bhubaneswar 751023, India
| | - Shubho Chaudhuri
- Division of Plant Biology, Bose Institute, P 1/12 CIT Scheme VIIM, Kolkata 700054, India
| | - Amita Pal
- Division of Plant Biology, Bose Institute, P 1/12 CIT Scheme VIIM, Kolkata 700054, India.
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Basha SA, Prasada Rao UJ. Purification and characterization of peroxidase from sprouted green gram (Vigna radiata) roots and removal of phenol and p-chlorophenol by immobilized peroxidase. J Sci Food Agric 2017; 97:3249-3260. [PMID: 27976372 DOI: 10.1002/jsfa.8173] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 11/26/2016] [Accepted: 12/05/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Peroxidase activity was increased during germination of green gram and such an increase may have benefits in many physiological processes. The present study aimed to investigate the optimum conditions for the extraction, purification and characterization of peroxidase from the germinated green gram roots and also its application for the removal of phenols in water. RESULTS Peroxidase activity was increased by 300-fold in 5-day germinated green gram. Because the root was rich in peroxidase activity, peroxidase from roots was isolated and purified to homogeneity. The purified peroxidase showed a single band on sodium dodecyl sulphate-polyacrylamide gel electrophoresis with a molecular weight of 50 kDa, an optimum pH of 5.5 and a pH stability ranging from 5 to 9. The enzyme had 50% residual activity at 70 °C. It catalyzed the oxidation of a variety of substrates. The Km value of the enzyme was 1.28 mmol L-1 for o-dianisidine and 0.045 mmol L-1 for H2 O2 . The enzyme lost 100% activity in the presence of dithiothreitol and cysteine. The addition of copper ion increased the enzyme activity by three-fold. Both soluble and immobilized peroxidases removed more phenol than p-chlorphenol, whereas horseradish peroxidase removed more p-chlorphenol. Thus, the green gram root peroxidase showed good pH and temperature stability, as well as the ability to remove phenolic compounds from effluent. CONCLUSION Peroxidase with good thermal and pH stability was purified from germinated green gram roots and has the ability to oxidize phenolic compounds from waste water. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Shaik Akbar Basha
- Department of Biochemistry, CSIR-Central Food Technological Research Institute, Mysuru, India
| | - Ummiti Js Prasada Rao
- Department of Biochemistry, CSIR-Central Food Technological Research Institute, Mysuru, India
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18
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Balestro GC, Higashi B, Lopes SMS, Gonçalves JE, Vieira LGE, de Oliveira AJB, Gonçalves RAC. Biochemical composition of symplastic sap from sugarcane genetically modified to overproduce proline. Plant Physiol Biochem 2017; 113:133-140. [PMID: 28213180 DOI: 10.1016/j.plaphy.2017.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 02/07/2017] [Accepted: 02/07/2017] [Indexed: 06/06/2023]
Abstract
Global interest in sugarcane has increased significantly in recent years because of its economic impact on sustainable energy production. The purpose of the present study was to evaluate changes in the concentrations of total sugars, amino acids, free proline, and total proteins by colorimetric analyses and nuclear magnetic resonance (NMR) to perform a metabolic profiling of a water-soluble fraction of symplastic sap in response to the constitutive expression of a mutant Δ1-pyrroline-5-carboxylate synthetase (P5CS) gene from Vigna aconitifolia. However, there was not a significant increase in the free proline content in the sap of transgenic plants compared to the non-transformed control plants. The most noticeable difference between the two genotypes was an almost two-fold increase in the accumulation of sucrose in the stem internodes of P5CS transgenic sugarcane plants. The results presented in this work showed that transgenic sugarcane plants with increased levels of free proline accumulates high soluble sugar content and, therefore, may represent a novel genotype for improving sugarcane cultivars.
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Affiliation(s)
- Graciele Carraro Balestro
- Department of Pharmacy, Graduate Program in Pharmaceutical Sciences, State University of Maringá, Avenida Colombo 5790, 87.020-900 Maringá, PR, Brazil
| | - Bruna Higashi
- Department of Pharmacy, Graduate Program in Pharmaceutical Sciences, State University of Maringá, Avenida Colombo 5790, 87.020-900 Maringá, PR, Brazil
| | - Sheila Mara Sanches Lopes
- Department of Pharmacy, Graduate Program in Pharmaceutical Sciences, State University of Maringá, Avenida Colombo 5790, 87.020-900 Maringá, PR, Brazil
| | - José Eduardo Gonçalves
- Program of Master in Health Promotion and Program of Master in Clean Technologies, University Center of Maringá, Avenida Guedner, 1610, 87050-900 Maringá, PR, Brazil
| | - Luiz Gonzaga Esteves Vieira
- Universidade do Oeste Paulista (UNOESTE), Rodovia Raposo Tavares, km 572, 19.067-175 Presidente Prudente, SP, Brazil
| | - Arildo José Braz de Oliveira
- Department of Pharmacy, Graduate Program in Pharmaceutical Sciences, State University of Maringá, Avenida Colombo 5790, 87.020-900 Maringá, PR, Brazil
| | - Regina Aparecida Correia Gonçalves
- Department of Pharmacy, Graduate Program in Pharmaceutical Sciences, State University of Maringá, Avenida Colombo 5790, 87.020-900 Maringá, PR, Brazil.
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Nahar K, Hasanuzzaman M, Alam MM, Rahman A, Mahmud JA, Suzuki T, Fujita M. Insights into spermine-induced combined high temperature and drought tolerance in mung bean: osmoregulation and roles of antioxidant and glyoxalase system. Protoplasma 2017; 254:445-460. [PMID: 27032937 DOI: 10.1007/s00709-016-0965-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 03/17/2016] [Indexed: 05/07/2023]
Abstract
High temperature and drought stress often occur simultaneously, and due to global climate change, this kind of phenomenon occurs more frequently and severely, which exerts devastating effects on plants. Polyamines (PAs) play crucial roles in conferring abiotic stress tolerance in plants. Present study investigated how exogenous pretreatment of spermine (Spm, 0.2 mM) enhances mung bean (Vigna radiata L. cv. BARI Mung-2) seedlings tolerance to high temperature (HT, 40 °C) and drought [induced by 5 % polyethyleneglycol (PEG)] stress individually and in combination. Spm pretreatment reduced reactive oxygen species (ROS) production including H2O2 and O2•-, lipoxygenase (LOX) activity, and membrane lipid peroxidation (indicated by malondialdehyde, MDA) under HT and/or drought stress. Histochemical staining of leaves with diaminobenzidine and nitro blue tetrazolium chloride also confirmed that Spm-pretreated seedlings accumulated less H2O2 and O2•- under HT and/or drought stress. Spermine pretreatment maintained the ascorbate (AsA) and glutathione (GSH) levels high, and upregulated the activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), dehydroascorbate reductase (DHAR), and glutathione reductase (GR) which were vital for imparting ROS-induced oxidative stress tolerance under HT and/or drought stress. The cytotoxic compound methylglyoxal (MG) was overproduced due to HT and/or drought, but exogenous Spm pretreatment reduced MG toxicity enhancing the glyoxalase system. Spermine pretreatment modulated endogenous PA levels. Osmoregulation and restoration of plant water status were other major contributions of Spm under HT and/or drought stress. Preventing photosynthetic pigments and improving seedling growth parameters, Spm further confirmed its influential roles in HT and/or drought tolerance.
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Affiliation(s)
- Kamrun Nahar
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Md Mahabub Alam
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
| | - Anisur Rahman
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Jubayer-Al Mahmud
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
- Department of Agroforestry and Environmental Science, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Toshisada Suzuki
- Biomass Chemistry Laboratory, Bioresource Science for Manufacturing, Department of Applied Bioresource Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan.
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20
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Lou HQ, Fan W, Xu JM, Gong YL, Jin JF, Chen WW, Liu LY, Hai MR, Yang JL, Zheng SJ. An Oxalyl-CoA Synthetase Is Involved in Oxalate Degradation and Aluminum Tolerance. Plant Physiol 2016; 172:1679-1690. [PMID: 27650448 PMCID: PMC5100784 DOI: 10.1104/pp.16.01106] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 09/14/2016] [Indexed: 05/22/2023]
Abstract
Acyl Activating Enzyme3 (AAE3) was identified to be involved in the catabolism of oxalate, which is critical for seed development and defense against fungal pathogens. However, the role of AAE3 protein in abiotic stress responses is unknown. Here, we investigated the role of rice bean (Vigna umbellata) VuAAE3 in Al tolerance. Recombinant VuAAE3 protein has specific activity against oxalate, with Km = 121 ± 8.2 µm and Vmax of 7.7 ± 0.88 µmol min-1 mg-1 protein, indicating it functions as an oxalyl-CoA synthetase. VuAAE3-GFP localization suggested that this enzyme is a soluble protein with no specific subcellular localization. Quantitative reverse transcription-PCR and VuAAE3 promoter-GUS reporter analysis showed that the expression induction of VuAAE3 is mainly confined to rice bean root tips. Accumulation of oxalate was induced rapidly by Al stress in rice bean root tips, and exogenous application of oxalate resulted in the inhibition of root elongation and VuAAE3 expression induction, suggesting that oxalate accumulation is involved in Al-induced root growth inhibition. Furthermore, overexpression of VuAAE3 in tobacco (Nicotiana tabacum) resulted in the increase of Al tolerance, which was associated with the decrease of oxalate accumulation. In addition, NtMATE and NtALS3 expression showed no difference between transgenic lines and wild-type plants. Taken together, our results suggest that VuAAE3-dependent turnover of oxalate plays a critical role in Al tolerance mechanisms.
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Affiliation(s)
- He Qiang Lou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Wei Fan
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Jia Meng Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Yu Long Gong
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Jian Feng Jin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Wei Wei Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Ling Yu Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Mei Rong Hai
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Jian Li Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.);
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.);
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
| | - Shao Jian Zheng
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (H.Q.L., J.M.X., Y.L.G., J.F.J., L.Y.L., J.L.Y., S.J.Z.)
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China (W.F.)
- Institute of Life Sciences, College of Environmental and Life Sciences, Hangzhou Normal University, Hangzhou 310036, China (W.W.C.); and
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China (M.R.H.)
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Nahar K, Hasanuzzaman M, Alam MM, Rahman A, Suzuki T, Fujita M. Polyamine and nitric oxide crosstalk: Antagonistic effects on cadmium toxicity in mung bean plants through upregulating the metal detoxification, antioxidant defense and methylglyoxal detoxification systems. Ecotoxicol Environ Saf 2016; 126:245-255. [PMID: 26773834 DOI: 10.1016/j.ecoenv.2015.12.026] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 05/02/2023]
Abstract
Cadmium (Cd) contamination is a serious agricultural and environmental hazard. The study investigates cross-protection roles of putrescine (Put, 0.2 mM) and nitric oxide (sodium nitroprusside; SNP, 1 mM) in conferring Cd (CdCl2, 1.5 mM) tolerance in mung bean (Vigna radiata L. cv. BARI Mung-2) seedlings. Cadmium stress increased root and shoot Cd content, reduced growth, destroyed chlorophyll (chl), modulated proline (Pro) and reduced leaf relative water content (RWC), increased oxidative damage [lipid peroxidation, H2O2 content, O2(∙-) generation rate, lipoxygenase (LOX) activity], methylglyoxal (MG) toxicity. Put and/or SNP reduced Cd uptake, increasd phytochelatin (PC) content, reduced oxidative damage enhancing non-enzymatic antioxidants (AsA and GSH) and activities of enzymes [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR), glutathione reductase (GR), glutathione S-transferase (GST), and glutathione peroxidase (GPX)]. Exogenous Put and/or SNP modulated endogenous polyamines, PAs (putrescine, Put; spermidine, Spd; spermine, Spm), and NO; improved glyoxalase system in detoxifying MG and improved physiology and growth where combined application showed better effects which designates possible crosstalk between NO and PAs to confer Cd-toxicity tolerance.
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Affiliation(s)
- Kamrun Nahar
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan; Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - Md Mahabub Alam
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
| | - Anisur Rahman
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan; Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Toshisada Suzuki
- Biomass Chemistry Laboratory, Bioresource Science for Manufacturing, Department of Applied Bioresource Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan.
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