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Guo P, Qi YP, Yang LT, Ye X, Huang JH, Chen LS. Long-Term Boron-Excess-Induced Alterations of Gene Profiles in Roots of Two Citrus Species Differing in Boron-Tolerance Revealed by cDNA-AFLP. FRONTIERS IN PLANT SCIENCE 2016; 7:898. [PMID: 27446128 PMCID: PMC4919357 DOI: 10.3389/fpls.2016.00898] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 06/07/2016] [Indexed: 05/18/2023]
Abstract
Boron (B) toxicity is observed in some citrus orchards in China. However, limited data are available on the molecular mechanisms of citrus B-toxicity and B-tolerance. Using cDNA-AFLP, we identified 20 up- and 52 down-regulated genes, and 44 up- and 66 down-regulated genes from excess B-treated Citrus sinensis and Citrus grandis roots, respectively, thereby demonstrating that gene expression profiles were more affected in the latter. In addition, phosphorus and total soluble protein concentrations were lowered only in excess B-treated C. grandis roots. Apparently, C. sinensis had higher B-tolerance than C. grandis. Our results suggested that the following several aspects were responsible for the difference in the B-tolerance between the two citrus species including: (a) B-excess induced Root Hair Defective 3 expression in C. sinensis roots, and repressed villin4 expression in C. grandis roots; accordingly, root growth was less inhibited by B-excess in the former; (b) antioxidant systems were impaired in excess B-treated C. grandis roots, hence accelerating root senescence; (c) genes related to Ca(2+) signals were inhibited (induced) by B-excess in C. grandis (C. sinensis) roots. B-excess-responsive genes related to energy (i.e., alternative oxidase and cytochrome P450), lipid (i.e., Glycerol-3-phosphate acyltransferase 9 and citrus dioxygenase), and nucleic acid (i.e., HDA19, histone 4, and ribonucleotide reductase RNR1 like protein) metabolisms also possibly accounted for the difference in the B-tolerance between the two citrus species. These data increased our understanding of the mechanisms on citrus B-toxicity and B-tolerance at transcriptional level.
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Affiliation(s)
- Peng Guo
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Yi-Ping Qi
- Institute of Materia Medica, Fujian Academy of Medical SciencesFuzhou, China
| | - Lin-Tong Yang
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Xin Ye
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Jing-Hao Huang
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- Pomological Institute, Fujian Academy of Agricultural SciencesFuzhou, China
| | - Li-Song Chen
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry UniversityFuzhou, China
- The Higher Educational Key Laboratory of Fujian Province for Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry UniversityFuzhou, China
- *Correspondence: Li-Song Chen
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Asencio AD, Morte A, García-Carmona F, Pérez-Gilabert M. PARTIAL PURIFICATION AND CHARACTERIZATION OF A CALCIUM-DEPENDENT ALKALINE PHOSPHATASE FROM THE CYANOBACTERIUM ARTHROSPIRA PLATENSIS (1). JOURNAL OF PHYCOLOGY 2012; 48:347-354. [PMID: 27009724 DOI: 10.1111/j.1529-8817.2012.01119.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the present study, Triton X-114 (TX-114) is used to extract and partially purify alkaline phosphatase (ALP) from a membranous fraction of Arthrospira platensis Gomont containing cell wall, plasma membrane, thylakoids, and sheath. TX-114 has a double effect: solubilizing cell components to liberate the enzyme and, after phase partitioning, removing chl and other pigments present in the crude extract. The recovery of the enzyme in the aqueous phase suggests the overall hydrophilic character of this enzyme. ALP was kinetically characterized at pH 11.0 using p-nitrophenyl phosphate as substrate, giving a Km value of 1.7 mM. Orthovanadate was seen to be a competitive inhibitor of ALP, with a Ki of 0.8 mM. The enzyme was almost completely inactivated in the presence of 70 μM EDTA, although the addition of Ca(2+) reverted this inactivation; these results indicate that ALP from A. platensis is a calcium-dependent metalloenzyme. When the effect of Ca(2+) was investigated in detail, a value of 0.067 μM(-1) for the affinity constant was obtained. The enzyme was histochemically localized in the cytoplasm, cell wall, and sheath using the enzyme-labeled fluorescent substrate (ELF) method. It is assumed that the same enzyme is either soluble in the cytoplasm and in some way "trapped" in the cell wall or in the sheath. ALP localization within the sheath and the subsequent release of phosphorus (P) may benefit the neighboring cells surrounding this layer.
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Affiliation(s)
- Antonia D Asencio
- División Botánica, Departamento de Biología Aplicada, Facultad de Ciencias Experimentales, Universidad Miguel Hernández, Campus de Elche, Avenida de la Universidad s/n, 03202 Elche, SpainDepartamento de Biología Vegetal, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, SpainDepartamento de Bioquímica y Biología Molecular-A, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Asuncióín Morte
- División Botánica, Departamento de Biología Aplicada, Facultad de Ciencias Experimentales, Universidad Miguel Hernández, Campus de Elche, Avenida de la Universidad s/n, 03202 Elche, SpainDepartamento de Biología Vegetal, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, SpainDepartamento de Bioquímica y Biología Molecular-A, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Francisco García-Carmona
- División Botánica, Departamento de Biología Aplicada, Facultad de Ciencias Experimentales, Universidad Miguel Hernández, Campus de Elche, Avenida de la Universidad s/n, 03202 Elche, SpainDepartamento de Biología Vegetal, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, SpainDepartamento de Bioquímica y Biología Molecular-A, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Manuela Pérez-Gilabert
- División Botánica, Departamento de Biología Aplicada, Facultad de Ciencias Experimentales, Universidad Miguel Hernández, Campus de Elche, Avenida de la Universidad s/n, 03202 Elche, SpainDepartamento de Biología Vegetal, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, SpainDepartamento de Bioquímica y Biología Molecular-A, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
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Pérez-Gilabert M, Sánchez-Felipe I, García-Carmona F. Purification and partial characterization of lipoxygenase from desert truffle (Terfezia claveryi Chatin) ascocarps. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:3666-3671. [PMID: 15853417 DOI: 10.1021/jf048087l] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A lipoxygenase from Terfezia claveryi Chatin ascocarp, a mycorrhizal hypogeous fungus, is described for the first time. The higher proportion of PUFA in T. claveryi ascocarps makes lipid rancidity the main factor limiting its storage life. Thus, the studies on LOX from T. claveryi are important because this enzyme, among other roles, may be involved in an alteration of lipids leading to consumer rejection. The enzyme has been purified to apparent homogeneity by phase partitioning in the presence of Triton X-114, followed by two steps of cation-exchange chromatography. The purified T. claveryi LOX preparation consisted of a single major band with an apparent molecular mass of 66 kDa after sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The enzymic activity exhibited a strong specificity toward linoleic and linolenic acids as substrates, while only 32% activity was observed using gamma-linolenic acid. The pH optimum of this enzyme was pH 7.0. When the enzyme reacted with linoleic acid, it produced a single peak, which comigrated with standard 13-hydroperoxy-octadecadienoic acid; 13-hydroperoxy-octadecatrienoic acid was produced during the reaction with linolenic acid.
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Affiliation(s)
- Manuela Pérez-Gilabert
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, E-30071 Murcia, Spain
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