Chongpei Zheng¹, Liangliang Li², Zhencheng Han², Weijie Li^2,*, Xiaopeng Wen^1,*

Phyton-International Journal of Experimental Botany, Vol.92, No.8, pp. 2399-2412, 2023, DOI:10.32604/phyton.2023.029891

Abstract

To explore how manganese affects the antioxidant system and the expression levels of related genes of “Hong yang” seedlings, the leaves of its tissue cultured seedlings were taken as test materials, and single factor treatment was performed by changing the manganese chloride (MnCl₂^.4H₂O) solution concentration when spraying the leaves. The expression levels of Mn-SOD, POD64 and POD27 genes in leaves were quantitatively analyzed by real-time quantitative PCR (qRT-PCR) at different determination times. Meanwhile, the contents of malondialdehyde (MDA), hydrogen peroxide (H₂O₂), the activities of antioxidant enzymes, including catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD). The results showed… More >

Junshan Zhao^1,#, Yihan Shi^1,#, Ming Zhang¹, Liu Zhang¹, Xumei Cui¹, Xinghua Zhu², Jitong Su¹, Dandan Jing¹, Dingyu Yang^1,*

Journal of Renewable Materials, Vol.11, No.1, pp. 79-91, 2023, DOI:10.32604/jrm.2023.022030

Abstract In this paper, the non-polluting, non-toxic, and eco-friendly material-MnO₂ electrodes were deposited on three-dimensional porous nickel (Ni) foam by linear sweep voltammetry, and the entire electrodeposition process did not require sintering of the material, which was fast and convenient while avoiding unnecessary energy consumption and thus was environmentally friendly. Scanning electron microscopy (SEM) and transmission electron microscopy were used to examine the surface and microscopic characteristics of each sample (TEM). Chronoamperometry (CA), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) were then used to determine the electrochemical characteristics of the manufactured samples. The result suggests that the… More >

Ying Liu^1,3,*, Jingye Chen^1,3, Xiaohao Li^1,3, Shaoxia Yang¹, Hanqiao Hu^1,3, Yingbin Xue^2,3,*

Phyton-International Journal of Experimental Botany, Vol.91, No.5, pp. 975-987, 2022, DOI:10.32604/phyton.2022.019057

Abstract In order to investigate the effects of Manganese (Mn) toxicity stress on the growth and gene expression at the seedling stage of soybean, soybean seedlings were treated with normal Mn concentration (5 μmol/L MnSO₄) and excess Mn concentration (100 μmol/L MnSO₄) by the method of hydroponic culture in this study. When soybean was subjected to Mn toxicity stress, excessive Mn could affect seedling growth, root development, the number of Mn oxide spots in leaves, and the Mn accumulation content in different parts of soybean. With the increase of exogenous Mn concentration and the prolongation of culture time, the shoot and… More >

Xing Li^1,3, Yugo Osaka^2,*, Hongyu Huang¹, Takuya Tsujiguchi², Akio Kodama²

Journal of Renewable Materials, Vol.9, No.9, pp. 1541-1553, 2021, DOI:10.32604/jrm.2021.015514

Abstract Sulfur dioxide (SO₂) emissions from diesel exhaust pose a serious threat to the environment and human health. Thus, desulfurization technology and the performance of desulfurization materials must be improved. In this study, MnO₂ was modified with various alkali metal ions using the impregnation method to enhance its SO₂ capture performance. The composites were characterized intensively by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and Brunauer-Emmett-Teller theory. The SO₂ capture performance of these composites were measured via thermogravimetry, and the effect of doping with alkali metal ions on the SO₂ capture performance of MnO₂ was investigated. Results showed that… More >

Dazhuang Qi^1,2,4,#, Meixia Liang^1,2,4,#, Fudong Jiang³, Jianzhao Li^1,2,4, Xuqiang Qiao^1,2,4,*, Hongxia Zhang^1,2,4,*

Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 943-955, 2020, DOI:10.32604/phyton.2020.013801

Abstract Manganese (Mn) is one of the essential microelements in all organisms. However, high level of Mn is deleterious to plants. In this study, the effects of exogenous manganese application on mineral element, polyamine (PA) and antioxidant accumulation, as well as polyamine metabolic and antioxidant enzyme activities, were investigated in Malus robusta Rehd., a widely grown apple rootstock. High level of Mn treatments decreased endogenous Mg, Na, K and Ca contents, but increased Zn content, in a Mn-concentration-dependent manner. Polyamine metabolic assays revealed that, except the content of perchloric acid insoluble bound (PIS-bound) spermine, which increased significantly, the contents of putrescine… More >

Hade Mao^{1, 2}, Yuliang Liu^{1, 2, *}, Hongzhe Yan^{1, 2}, Cheng Qian³, Jing Xue⁴

CMC-Computers, Materials & Continua, Vol.65, No.1, pp. 511-527, 2020, DOI:10.32604/cmc.2020.09841

Abstract To troubleshoot two problems arising from the segmentation of manganese nodule images-uneven illumination and morphological defects caused by white sand coverage, we propose, with reference to features of manganese nodules, a method called “background gray value calculation”. As the result of the image procession with the aid this method, the two problems above are solved eventually, together with acquisition of a segmentable image of manganese nodules. As a result, its comparison with other segmentation methods justifies its feasibility and stability. Judging from simulation results, it is indicated that this method is applicable to repair the target shape in the image,… More >

VIRGINIA VILLALOBOS¹, ERNESTO BONILLA^2,4,*, ALAN CASTELLANO³, ERNESTO NOVO¹, RALPH CASPERSEN⁴, DEBORA GIRALDOTH¹, SHIRLEY MEDINA-LEENDERTZ⁴

BIOCELL, Vol.33, No.3, pp. 187-197, 2009, DOI:10.32604/biocell.2009.33.187

Abstract The effect of manganese toxicity on the ultrastructure of the olfactory bulb was evaluated. Male albino mice were injected intraperitoneally with MnCl₂ (5 mg/Kg/day) five days per week during nine weeks. The control group received NaCl (0.9%). The olfactory bulbs of five mice from each group were processed for transmission electron microscopy after 2, 4, 6 and 9 weeks of manganese treatment. On week 2, some disorganization of the myelin sheaths was observed. After 4 weeks, degenerated neurons with dilated cisternae of rough endoplasmic reticulum and swollen mitochondria appeared. A certain degree of gliosis with a predominance of astrocytes with… More >

Carmona MA¹, E Simonetti^2,3, ME Ravotti¹, MM Sc,iani⁴, AG Luque⁴, NA Formento⁵, FJ Sautua¹

Phyton-International Journal of Experimental Botany, Vol.86, pp. 265-269, 2017, DOI:10.32604/phyton.2017.86.265

Abstract Soybean root and stem rots caused by soil-borne pathogens are diseases commonly found in soybean fields, and one of the most important causes of crop losses. In the present study, the mycelial sensitivity of Fusarium virguliforme, F. tucumaniae, Sclerotinia sclerotiorum and Macrophomina phaseolina was evaluated on potato dextrose agar media (25 mL) supplemented with different concentrations of manganese phosphite (MnPhi) diluted in water (0, 25, 37.5, 50, 100, 200, 300, 400, 500, 800 and 1000 μg/mL). Mycelial growth sensitivity was analyzed using logarithmic linear regression analysis. The MnPhi concentration needed to inhibit 50% of the mycelial growth (IC₅₀) ranged from… More >