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[PMID]: 29397510
[Au] Autor:Garole DJ; Choudhary BC; Paul D; Borse AU
[Ad] Address:School of Chemical Sciences, North Maharashtra University, Jalgaon, Maharashtra, 425001, India. drdipakgarole@gmail.com.
[Ti] Title:Sorption and recovery of platinum from simulated spent catalyst solution and refinery wastewater using chemically modified biomass as a novel sorbent.
[So] Source:Environ Sci Pollut Res Int;, 2018 Feb 03.
[Is] ISSN:1614-7499
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:In this study, Lagerstroemia speciosa biomass modified by polyethylenimine (PEI-LS) was developed as a potential biosorbent for sorption and recovery of platinum(II) from platinum bearing waste solutions. Batch experiments were conducted to study the effect of various parameters on the sorption and recovery of platinum(II) using PEI-LS. The equilibrium time for platinum(II) sorption process was found to be 6 h. Both the sorption kinetics and sorption isotherm data fits pseudo second-order kinetic model and Langmuir isotherm, respectively. The maximum sorption capacity of platinum(II) onto PEI-LS at pH 2 for the studied temperature range (25-45 °C) is in the range of 122-154 mg/g. Evaluation of thermodynamic parameters suggests that the platinum(II) sorption is spontaneous and endothermic in nature. The regeneration of PEI-LS can be achieved using acidic thiourea as an eluent for recovery of platinum from the biosorbent. Fourier transform infrared (FT-IR) analysis suggests many functional groups were involved in platinum(II) sorption onto PEI-LS. Both the scanning electron microscope/energy dispersive spectroscopy (SEM/EDS) and X-ray photoelectron spectroscopy (XPS) analysis suggest a successful modification of raw biomass with PEI. The XPS analysis further concludes that platinum(II) sorption is governed by ion-exchange and co-ordination reaction. Finally, the PEI-LS was shown to recover ≥ 90% of platinum from two simulated solutions: the acid-leached spent catalyst solution and refinery wastewater. The biosorbent developed in this study is a low-cost and eco-friendly media that can be effectively used for platinum recovery from industrial wastewater.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1802
[Cu] Class update date: 180204
[Lr] Last revision date:180204
[St] Status:Publisher
[do] DOI:10.1007/s11356-018-1351-5

  2 / 149 MEDLINE  
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[PMID]: 29229368
[Au] Autor:Agarwal VK; Amresh G; Chandra P
[Ad] Address:Department of Pharmaceutics, Invertis Institute of Pharmacy, Invertis University, NH 24 Lucknow Bareilly Highway, Bareilly, Uttar Pradesh, India.
[Ti] Title:Pharmacodynamic evaluation of self micro-emulsifying formulation of standardized extract of Lagerstroemia speciosa for antidiabetic activity.
[So] Source:J Ayurveda Integr Med;, 2017 Dec 08.
[Is] ISSN:0975-9476
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:BACKGROUND: Lagerstroemia speciosa (SEL) leaves are a popular folk medicine for diabetes treatment due to presence of corosolic acid. It has low water solubility resulting poor absorption after oral administration. Self micro-emulsified drug delivery system is the way by which we can improve the oral absorption of drug. OBJECTIVE: The objective of this study was to develop the self micro-emulsifying formulation of standardized extract of SEL leaves and evaluate its pharmacodynamic performance for antidiabetic activity. MATERIALS AND METHODS: The SME formulation was prepared by using sefsol-218 as oil, cremophor-EL as surfactant and transcutol-P as co-surfactant. The ratio of surfactant and co-surfactant was determined by pseudoternary phase diagram. SME formulations were characterized for dilution at different pH, self emulsification, optical clarity, globule size and thermodynamic stability. Pharmacodynamic evaluation of formulations was assessed in Wistar rats by using parameters viz. blood glucose level and serum lipid profile. RESULTS: SEL loaded SME formulation was successfully developed by using sefsol-218, cremophor-EL and transcutol-P with a droplet size 23.53 nm. Pharmacodynamic results showed a higher reduction in blood glucose by SME formulation than SEL without SMES respectively at 50 mg/kg dose while reduction produced at dose of 100 mg/kg was found significant and better on 15th day of study. The percentage reduction produced by SME formulation on serum lipid profile was also significant and was more prominent than SEL. CONCLUSION: This study confirms that the formulation elevates the pharmacodynamic performance of SEL approximately two fold.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1712
[Cu] Class update date: 171212
[Lr] Last revision date:171212
[St] Status:Publisher

  3 / 149 MEDLINE  
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[PMID]: 28537012
[Au] Autor:Cicero AFG; Fogacci F; Morbini M; Colletti A; Bove M; Veronesi M; Giovannini M; Borghi C
[Ad] Address:Department of Medicine and Surgery Sciences, University of Bologna, Bologna, Italy. arrigo.cicero@unibo.it.
[Ti] Title:Nutraceutical Effects on Glucose and Lipid Metabolism in Patients with Impaired Fasting Glucose: A Pilot, Double-Blind, Placebo-Controlled, Randomized Clinical Trial on a Combined Product.
[So] Source:High Blood Press Cardiovasc Prev;, 2017 May 23.
[Is] ISSN:1179-1985
[Cp] Country of publication:New Zealand
[La] Language:eng
[Ab] Abstract:INTRODUCTION: A number of natural compounds have individually demonstrated to improve glucose and lipid levels in humans. AIM: To  evaluate the short-term glucose and lipid-lowering activity in subjects with impaired fasting glucose. METHODS: To assess the effects of a combination of nutraceuticals based on Lagerstroemia speciosa, Berberis aristata, Curcuma longa, Alpha-lipoic acid, Chrome picolinate and Folic acid, we performed a double-blind, parallel group, placebo-controlled, randomized clinical trial in 40 adults affected by impaired fasting glucose (FPG = 100-125 mg/dL) in primary prevention of cardiovascular disease. After a period of 2 weeks of dietary habits correction only, patients continued the diet and began a period of 8 weeks of treatment with nutraceutical or placebo. Data related to lipid pattern, insulin resistance, liver function and hsCRP were obtained at the baseline and at the end of the study. RESULTS: No side effects were detected in both groups of subjects. After the nutraceutical treatment, and compared to the placebo-treated group, the enrolled patients experienced a significant improvement in TG (-34.7%), HDL-C (+13.7), FPI (-13.4%), and HOMA-Index (-25%) versus the baseline values. No significant changes were observed in the other investigated parameters in both groups (Body Mass Index, LDL-C, hsCRP). CONCLUSIONS: The tested combination of nutraceuticals showed clinical efficacy in the improvement of TG, HDL-C, FPI and HOMA-Index, with an optimal tolerability profile. Further confirmation is needed to verify these observations on the middle and long term with a larger number of subjects.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1705
[Cu] Class update date: 170919
[Lr] Last revision date:170919
[St] Status:Publisher
[do] DOI:10.1007/s40292-017-0206-3

  4 / 149 MEDLINE  
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[PMID]: 28516056
[Au] Autor:Hiendrawan S; Veriansyah B; Widjojokusumo E; Tjandrawinata RR
[Ad] Address:Section of Advanced Technology Development, Research Innovation and Invention, Dexa Laboratories of Biomolecular Sciences, Cikarang, Indonesia.
[Ti] Title:Simultaneous micronization and purification of bioactive fraction by supercritical antisolvent technology.
[So] Source:J Adv Pharm Technol Res;8(2):52-58, 2017 Apr-Jun.
[Is] ISSN:2231-4040
[Cp] Country of publication:India
[La] Language:eng
[Ab] Abstract:Simultaneous micronization and purification of DLBS3233 bioactive fraction, a combination of two Indonesian herbals Lagerstroemia speciosa and Cinnamomum burmannii has been successfully performed via supercritical anti-solvent (SAS) technology. The objective of the present study was to investigate the effectiveness of SAS technology to micronize and reduce coumarin content of DLBS3233. The effects of four SAS process parameters, i.e. pressure, temperature, concentration and solution flow rate on particle formation were investigated. In SAS process, DLBS3233 was dissolved in dimethylformamide (DMF) as the liquid solvent. The solution was then pumped through a nozzle into a chamber simultaneously with supercritical carbon dioxide (SC-CO2) which acts as the anti-solvent, resulting in DLBS3233 precipitation. Physicochemical properties of unprocessed DLBS3233 and SAS-processed DLBS3233 particles were analyzed using scanning electron microscopy (SEM) and high pressure liquid chromatography (HPLC). Total polyphenol content (TPC) was also analyzed. Particles with mean particle size ranging from 0.107±0.028 m to 0.298±0.138 m were obtained by varying the process parameters. SAS-processed DLBS3233 particles showed no coumarin content in all experiments studied in this work. Results of TPC analysis revealed no significant change in SAS-processed DLBS3233 particles compared to unprocessed DLBS3233. Nano-sized DLBS3233 particles with no coumarin content have been successfully produced using SAS process. This study demonstrates the ability of SAS for processing herbal medicine in single step process.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1705
[Cu] Class update date: 170816
[Lr] Last revision date:170816
[St] Status:PubMed-not-MEDLINE
[do] DOI:10.4103/japtr.JAPTR_164_16

  5 / 149 MEDLINE  
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[PMID]: 28477823
[Au] Autor:Srivastava S; Agrawal SB; Mondal MK
[Ad] Address:Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
[Ti] Title:Synthesis, characterization and application of Lagerstroemia speciosa embedded magnetic nanoparticle for Cr(VI) adsorption from aqueous solution.
[So] Source:J Environ Sci (China);55:283-293, 2017 May.
[Is] ISSN:1001-0742
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:Lagerstroemia speciosa bark (LB) embedded magnetic nanoparticles were prepared by co-precipitation of Fe and Fe salt solution with ammonia and LB for Cr(VI) removal from aqueous solution. The native LB, magnetic nanoparticle (MNP), L. speciosa embedded magnetic nanoparticle (MNPLB) and Cr(VI) adsorbed MNPLB particles were characterized by SEM-EDX, TEM, BET-surface area, FT-IR, XRD and TGA methods. TEM analysis confirmed nearly spherical shape of MNP with an average diameter of 8.76nm and the surface modification did not result in the phase change of MNP as established by XRD analysis, while led to the formation of secondary particles of MNPLB with diameter of 18.54nm. Characterization results revealed covalent binding between the hydroxyl group of MNP and carboxyl group of LB particles and further confirmed its physico-chemical nature favorable for Cr(VI) adsorption. The Cr(VI) adsorption on to MNPLB particle as an adsorbent was tested under different contact time, initial Cr(VI) concentration, adsorbent dose, initial pH, temperature and agitation speed. The results of the equilibrium and kinetics of adsorption were well described by Langmuir isotherm and pseudo-second-order model, respectively. The thermodynamic parameters suggest spontaneous and endothermic nature of Cr(VI) adsorption onto MNPLB. The maximum adsorption capacity for MNPLB was calculated to be 434.78mg/g and these particles even after Cr(VI) adsorption were collected effortlessly from the aqueous solution by a magnet. The desorption of Cr(VI)-adsorbed MNPLB was found to be more than 93.72% with spent MNPLB depicting eleven successive adsorption-desorption cycles.
[Mh] MeSH terms primary: Biodegradation, Environmental
Chromium/chemistry
Lagerstroemia/chemistry
Magnetite Nanoparticles/chemistry
Water Pollutants, Chemical/chemistry
[Mh] MeSH terms secundary: Adsorption
Magnetics
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Magnetite Nanoparticles); 0 (Water Pollutants, Chemical); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion)
[Em] Entry month:1706
[Cu] Class update date: 170605
[Lr] Last revision date:170605
[Js] Journal subset:IM
[Da] Date of entry for processing:170508
[St] Status:MEDLINE

  6 / 149 MEDLINE  
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[PMID]: 28477818
[Au] Autor:Choudhary BC; Paul D; Gupta T; Tetgure SR; Garole VJ; Borse AU; Garole DJ
[Ad] Address:School of Chemical Sciences, North Maharashtra University, Jalgaon 425001, Maharashtra, India; Centre for Environmental Science & Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India. Electronic address: bharatchoudhary30@gmail.com.
[Ti] Title:Photocatalytic reduction of organic pollutant under visible light by green route synthesized gold nanoparticles.
[So] Source:J Environ Sci (China);55:236-246, 2017 May.
[Is] ISSN:1001-0742
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:We report a rapid method of green chemistry approach for synthesis of gold nanoparticles (AuNPs) using Lagerstroemia speciosa leaf extract (LSE). L. speciosa plant extract is known for its effective treatment of diabetes and kidney related problems. The green synthesis of AuNPs was complete within 30min at 25°C. The same could also be achieved within 2min at a higher reaction temperature (80°C). Both UV-visible spectroscopy and transmission electron microscopy results suggest that the morphology and size distribution of AuNPs are dependent on the pH of gold solution, gold concentration, volume of LSE, and reaction time and temperature. Comparison between Fourier transform infrared spectroscopy (FT-IR) spectra of LSE and the synthesized AuNPs indicate an active role of polyphenolic functional groups (from gallotannins, lagerstroemin, and corosolic acid) in the green synthesis and capping of AuNPs. The green route synthesized AuNPs show strong photocatalytic activity in the reduction of dyes viz., methylene blue, methyl orange, bromophenol blue and bromocresol green, and 4-nitrophenol under visible light in the presence of NaBH . The non-toxic and cost effective LSE mediated AuNPs synthesis proposed in this study is extremely rapid compared to the other reported methods that require hours to days for complete synthesis of AuNPs using various plant extracts. Strong and stable photocatalytic behavior makes AuNPs attractive in environmental applications, particularly in the reduction of organic pollutants in wastewater.
[Mh] MeSH terms primary: Gold/chemistry
Green Chemistry Technology
Metal Nanoparticles/chemistry
Models, Chemical
Organic Chemicals/chemistry
Water Pollutants, Chemical/chemistry
[Mh] MeSH terms secundary: Light
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Organic Chemicals); 0 (Water Pollutants, Chemical); 7440-57-5 (Gold)
[Em] Entry month:1706
[Cu] Class update date: 170605
[Lr] Last revision date:170605
[Js] Journal subset:IM
[Da] Date of entry for processing:170508
[St] Status:MEDLINE

  7 / 149 MEDLINE  
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[PMID]: 28472721
[Au] Autor:Sai Saraswathi V; Saravanan D; Santhakumar K
[Ad] Address:Department of Chemistry, SAS, VIT University, Vellore 632014, India.
[Ti] Title:Isolation of quercetin from the methanolic extract of Lagerstroemia speciosa by HPLC technique, its cytotoxicity against MCF-7 cells and photocatalytic activity.
[So] Source:J Photochem Photobiol B;171:20-26, 2017 Jun.
[Is] ISSN:1873-2682
[Cp] Country of publication:Switzerland
[La] Language:eng
[Ab] Abstract:The flavonoids present in the leaves of Lagerstroemia speciosa were extracted, characterized by spectral methods and studied for its cytotoxicity activity against MCF-cell lines and photocatalytic activity against azo dye. Direct and sequential soxhlet extraction was performed and its concentrated crude extract was subjected to high performance liquid chromatography. The yield obtained by the isolated compound (MEI-quercetin) from leaves of L. speciosa was found to be 1.8g from the methanolic extract. The phytochemical analysis and the Rf value of the isolated flavonoid was found to be 3.59. The isolated compound was characterized by Infrared Spectroscopy, NMR and Mass. Based on the characterization, the structure was elucidated as quercetin - a flavonoid. The isolated compound showed the significant in vitro cytotoxicity activity against MCF-7 cell lines at 500µg/ml when compared to the crude extract. Among the various concentrations (25, 50, 100, 250, and 500µg/ml), at higher concentration the cell viability was pronounced and also compared with that of the control. It was first time to report that the isolated flavonoid showed photocatalytic against azo dye-methyl orange. The dye degradation was monitored by UV-Vis spectrophotometry. The isolated compound showed dye degradation of 91.66% with the crude extract 82.47% at 160min. Hence in the present findings, the photocatalytic degradation of MO dye under UV irradiation was investigated over isolated compound of L. speciosa. Hence we expect that this can be used to treat the waste water in near future based on the photocatalytic technique.
[Mh] MeSH terms primary: Lagerstroemia/chemistry
Plant Extracts/chemistry
[Mh] MeSH terms secundary: Azo Compounds/chemistry
Azo Compounds/metabolism
Azo Compounds/toxicity
Catalysis
Cell Survival/drug effects
Cell Survival/radiation effects
Chromatography, High Pressure Liquid
Humans
Lagerstroemia/metabolism
Light
MCF-7 Cells
Magnetic Resonance Spectroscopy
Mass Spectrometry
Methanol/chemistry
Photolysis/radiation effects
Plant Leaves/chemistry
Plant Leaves/metabolism
Quercetin/analysis
Quercetin/isolation & purification
Quercetin/toxicity
Spectrophotometry, Ultraviolet
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Azo Compounds); 0 (Plant Extracts); 6B4TC34456 (methyl orange); 9IKM0I5T1E (Quercetin); Y4S76JWI15 (Methanol)
[Em] Entry month:1709
[Cu] Class update date: 170920
[Lr] Last revision date:170920
[Js] Journal subset:IM
[Da] Date of entry for processing:170505
[St] Status:MEDLINE

  8 / 149 MEDLINE  
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[PMID]: 28444603
[Au] Autor:Singh H; Savita; Sharma R; Sinha S; Kumar M; Kumar P; Verma A; Sharma SK
[Ad] Address:Ecology, Climate Change and Forest Influence Division, Forest Research Institute, P.O. New Forest, Dehradun, Uttarakhand, 248006, India. hukumsingh97@yahoo.com.
[Ti] Title:Physiological functioning of Lagerstroemia speciosa L. under heavy roadside traffic: an approach to screen potential species for abatement of urban air pollution.
[So] Source:3 Biotech;7(1):61, 2017 May.
[Is] ISSN:2190-572X
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:The mitigation potential of avenue tree species needs a sound understanding, especially for landscape planning or planting tree species on roadside, especially in city limits where there is huge traffic due to more number of vehicles. A preliminary study was conducted to investigate the impact of heavy traffic movement and pollution thereof on physiological functioning of Lagerstroemia speciosa trees planted on roadside in terms of carbon absorption, mitigation potential and adaptive behavior. Trees on roadside exhibited reduced carbon assimilation (36.7 ± 2.4%) and transpiration rate (42.14 ± 2.9%), decreased stomatal conductance (66.85 ± 3.87%), increased stomatal resistance (212.2 ± 11.25%), more leaf thickness (40.54 ± 3.25) and water use efficiency (9.4 ± 0.87%), and changes in lead (179.31 ± 10.24%) and proline (15.61 ± 1.92%) concentration in leaf tissues when compared to less traffic area (FRI campus). The impacts were also witnessed in the form of enhanced vapour pressure deficit of air (63.18 ± 4.94%) and leaf (45.72 ± 3.25%), and air temperature (3.2 ± 0.16%) and leaf temperature (9.0 ± 0.82%) along roadside trees. It was inferred that heavy traffic movements interrupt the physiological functioning of trees due to alteration in the surrounding environment as compared to non-traffic areas. The present study provides baseline information to further explore and identify the potential avenue tree species having significant mitigation potential and adaptive efficiency to heavy traffic movements for improving urban environment.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1704
[Cu] Class update date: 170816
[Lr] Last revision date:170816
[St] Status:PubMed-not-MEDLINE
[do] DOI:10.1007/s13205-017-0690-0

  9 / 149 MEDLINE  
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[PMID]: 28319869
[Au] Autor:Sai Saraswathi V; Kamarudheen N; Bhaskara Rao KV; Santhakumar K
[Ad] Address:Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, India.
[Ti] Title:Biofilm inhibition formation of clinical strains of Pseudomonas aeruginosa mutans, photocatalytic activity of azo dye and GC-MS analysis of leaves of Lagerstroemia speciosa.
[So] Source:J Photochem Photobiol B;169:148-160, 2017 Apr.
[Is] ISSN:1873-2682
[Cp] Country of publication:Switzerland
[La] Language:eng
[Ab] Abstract:The investigation was conducted to analyse the bioactive compounds from the leaf extracts of L. speciosa by GC-MS. The extracts were screened for antibacterial and antibiofilm activities against potential clinical strains. The bioactive compounds from the leaves of L. speciosa were extracted by soxhlet continuous extraction method and their chemical composition was analysed by Gas Chromatography-Mass Spectroscopy (GC-MS). The antibacterial activity was evaluated against clinical strain like Staphylococcus aureus, Escherichia coli, P. aeruginosa and Salmonella typhi by well diffusion technique. We also screened for antibacterial property against common food borne pathogens namely Listeria monocytogenes and Bacillus cereus at varied concentration 250µml to 1000µml . Thereafter antibiofilm assay was carried out at from 250 to 1000µg/ml against P. aeruginosa (high biofilm forming pathogen) clinical strain by cover slip technique and the morphology of the pathogen was observed using Scanning Electron Microscopy-(SEM). It was observed that diverse class of secondary metabolites were found by GC-MS analysis for all the extracts upon the continuous extraction. It was found that only minimum inhibition was seen in alcoholic extract for antibacterial activity, whereas all other extracts showed negligible activity. P. aeruginosa biofilm inhibited to 93.0±2% and 91±2% at higher concentration (1000µg/ml) for methanolic and ethanolic extract respectively. Absence of extracellular matrix structure and the surface cracking of biofilm were viewed by SEM, which confirmed the antibiofilm activity. Hence this study reveals that L. speciosa showed significant antibiofilm activity against P. aeruginosa due to the phytoconstituents present in the leaf extracts which was well documented in the alcoholic extracts by GC-MS analysis. The methanolic and ethanolic extract showed good photocatalytic activity of 77.44% and 96.66% against azo dye degradation respectively. Further, isolating the novel phyto-compounds would yield better promising biological activities.
[Mh] MeSH terms primary: Azo Compounds/chemistry
Biofilms/drug effects
Lagerstroemia/chemistry
Photochemical Processes
Plant Extracts/pharmacology
Pseudomonas aeruginosa/physiology
[Mh] MeSH terms secundary: Anti-Bacterial Agents/isolation & purification
Anti-Bacterial Agents/pharmacology
Gas Chromatography-Mass Spectrometry
Plant Extracts/isolation & purification
Plant Extracts/metabolism
Plant Leaves/chemistry
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Anti-Bacterial Agents); 0 (Azo Compounds); 0 (Plant Extracts)
[Em] Entry month:1704
[Cu] Class update date: 170426
[Lr] Last revision date:170426
[Js] Journal subset:IM
[Da] Date of entry for processing:170321
[St] Status:MEDLINE

  10 / 149 MEDLINE  
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[PMID]: 28277741
[Au] Autor:Wang S; Wang P; Gao L; Yang R; Li L; Zhang E; Wang Q; Li Y; Yin Z
[Ad] Address:1 Southern Modern Forestry Collaborative Innovation Center, College of Biology and the Environment, Nanjing Forestry University , Nanjing, China .
[Ti] Title:Characterization and Complementation of a Chlorophyll-Less Dominant Mutant GL1 in Lagerstroemia indica.
[So] Source:DNA Cell Biol;36(5):354-366, 2017 May.
[Is] ISSN:1557-7430
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Crape myrtle (Lagerstroemia indica) is a woody ornamental plant popularly grown because of its long-lasting, midsummer blooms and beautiful colors. The GL1 dominant mutant is the first chlorophyll-less mutant identified in crape myrtle. It was obtained from a natural yellow leaf bud mutation. We previously revealed that leaf color of the GL1 mutant is affected by light intensity. However, the mechanism of the GL1 mutant on light response remained unclear. The acclimation response of mutant and wild-type (WT) plants was assessed in a time series after transferring from low light (LL) to high light (HL) by analyzing chlorophyll synthesis precursor content, photosynthetic performance, and gene expression. In LL conditions, coproporphyrinogen III (Coprogen III) content had the greatest amount of accumulation in the mutant compared with WT, increasing by 100%. This suggested that the yellow leaf phenotype of the GL1 dominant mutant might be caused by disruption of coproporphyrinogen III oxidase (CPO) biosynthesis. Furthermore, the candidate gene, oxygen-independent CPO (HEMN), might only affect expression of upstream genes involved in chlorophyll metabolism in the mutant. Moreover, two genes, photosystem II (PSII) 10 kDa protein (psbR) and chlorophyll a/b binding protein gene (CAB1), had decreased mRNA levels in the GL1 mutant within the first 96 h following LL/HL transfer compared with the WT. Hierarchical clustering revealed that these two genes shared a similar expression trend as the oxygen-dependent CPO (HEMF). These findings provide evidence that GL1 is highly coordinated with PSII stability and chloroplast biogenesis.
[Mh] MeSH terms primary: Chlorophyll/genetics
Lagerstroemia/genetics
Mutation
[Mh] MeSH terms secundary: Acclimatization/genetics
Gene Expression Regulation, Plant/radiation effects
Genes, Dominant
Genetic Complementation Test
Light
Photosynthesis/genetics
Plant Leaves/genetics
Plants, Genetically Modified
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:1406-65-1 (Chlorophyll)
[Em] Entry month:1709
[Cu] Class update date: 170908
[Lr] Last revision date:170908
[Js] Journal subset:IM
[Da] Date of entry for processing:170310
[St] Status:MEDLINE
[do] DOI:10.1089/dna.2016.3573


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