Academic Journal
A cotton ascorbate peroxidase is involved in hydrogen peroxide homeostasis during fibre cell development
| العنوان: | A cotton ascorbate peroxidase is involved in hydrogen peroxide homeostasis during fibre cell development |
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| المؤلفون: | Li, Hong-Bin, Qin, Yong-Mei, Pang, Yu, Song, Wen-Qiang, Mei, Wen-Qian, Zhu, Yu-Xian |
| المساهمون: | Qin, YM (reprint author), Peking Univ, Natl Lab Prot Engn & Plant Genet Engn, Coll Life Sci, Beijing 100871, Peoples R China., Peking Univ, Natl Lab Prot Engn & Plant Genet Engn, Coll Life Sci, Beijing 100871, Peoples R China., Peking Univ, Dept Biochem & Mol Biol, Coll Life Sci, Beijing 100871, Peoples R China. |
| المصدر: | SCI ; PubMed |
| بيانات النشر: | new phytologist |
| سنة النشر: | 2007 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | ascorbate peroxidase, ethylene, Gossypium hirsutum (cotton), reactive oxygen species (ROS), OXYGEN GENE NETWORK, EXCESS LIGHT STRESS, ELONGATION GROWTH, IN-VITRO, ARABIDOPSIS, EXPRESSION, SPINACH, LEAVES, PURIFICATION, ISOENZYMES |
| الوصف: | Reactive oxygen species (ROS) play important roles in multiple physiological processes such as cellular signalling and stress responses, whereas, the hydrogen peroxide (H2O2) scavenging enzyme ascorbate peroxidase (APX) participates in the regulation of intracellular ROS levels.Here, a cotton (Gossypium hirsutum) cytosolic APX1 (GhAPX1) was identified to be highly accumulated during cotton fibre elongation by proteomic analysis. GhAPX1 cDNA contained an open reading frame of 753-by encoding a protein of 250 amino acid residues. When GhAPX1 was expressed in Escherichia coli, the purified GhAPX1 was a dimer consisting of two identical subunits with a molecular mass of 28 kDa. GhAPX1 showed the highest substrate specificity for ascorbate. Quantitative real-time polymerase chain reaction (PCR) analyses showed that GhAPX1 was highly expressed in wild-type 5-d postanthesis fibres with much lower transcript levels in the fuzzless-lintless mutant ovules. Treating in vitro cultured wild-type cotton ovules with exogenous H2O2 or ethylene induced the expression of GhAPX1 and hence increased total APX activity proportionally, followed by extended fibre cell elongation. These data suggest that GhAPX1 expression is upregulated in response to an increase in cellular H202 and ethylene. GhAPX1 encodes a functional enzyme that is involved in hydrogen peroxide homeostasis during cotton fibre development. ; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000248451100009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Plant Sciences ; SCI(E) ; PubMed ; 54 ; ARTICLE ; 3 ; 462-471 ; 175 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 0028-646X |
| Relation: | NEW PHYTOLOGIST.2007,175,(3),462-471.; 673023; http://hdl.handle.net/20.500.11897/198021; WOS:000248451100009 |
| DOI: | 10.1111/j.1469-8137.2007.02120.x |
| الاتاحة: | https://hdl.handle.net/20.500.11897/198021 https://doi.org/10.1111/j.1469-8137.2007.02120.x |
| رقم الانضمام: | edsbas.3129C9D2 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 0028646X |
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| DOI: | 10.1111/j.1469-8137.2007.02120.x |