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Yang L, Wu Y, Zhang M, Zhang J, Stewart JM, Xing C, Wu J, Jin S. Transcriptome, cytological and biochemical analysis of cytoplasmic male sterility and maintainer line in CMS-D8 cotton. PLANT MOLECULAR BIOLOGY 2018; 97:537-551. [PMID: 30066309 DOI: 10.1007/s11103-018-0757-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/14/2018] [Indexed: 05/26/2023]
Abstract
Key message This research based on RNA-seq, biochemical, and cytological analyses sheds that ROS may serve as important signaling molecules of cytoplasmic male sterility in CMS-D8 cotton. To understand the mechanism of cytoplasmic male sterility in cotton (Gossypium hirsutum), transcriptomic, cytological, and biochemical analysis were performed between the cytoplasmic male sterility CMS-D8 line, Zhong41A, and its maintainer line Zhong41B. A total of 2335 differentially expressed genes (DEGs) were identified in the CMS line at three different stages of anther development. Bioinformatics analysis of these DEGs indicated their relationship to reactive oxygen species (ROS) homeostasis, including reduction-oxidation reactions and the metabolism of glutathione and ascorbate. At the same time, DEGs associated with tapetum development, especially the transition to secretory tapetum, were down-regulated in the CMS line. Biochemical analysis indicated that the ability of the CMS line to eliminate ROS was decreased, which led to the rapid release of H2O2. Cytological analysis revealed that the most crucial defect in the CMS line was the abnormal tapetum. All these results are consistent with the RNA sequencing data. On the basis of our findings, we propose that ROS act as signal molecules, which are released from mitochondria and transferred to the nucleus, triggering the formation of abnormal tapetum.
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Affiliation(s)
- Li Yang
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, People's Republic of China
| | - Yuanlong Wu
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, People's Republic of China
| | - Meng Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, People's Republic of China
| | - Jinfa Zhang
- Department of Plant and Environmental Sciences, New Mexico State University, Las Cruces, NM, 88003, USA
| | | | - Chaozhu Xing
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, People's Republic of China.
| | - Jianyong Wu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, People's Republic of China.
| | - Shuangxia Jin
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, People's Republic of China
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Rodriguez-Cabrera NA, Regalado C, Garcia-Almendarez BE. Cloning, heterologous expression and properties of a recombinant active turnip peroxidase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:7120-7126. [PMID: 21591783 DOI: 10.1021/jf2006722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Turnip (Brassica napus) roots peroxidase isoforms have been used in diagnostic kits and can also efficiently polymerize phenolic compounds from wastewaters. Heterologous expression of a turnip acidic peroxidase (BnPA) was investigated to increase availability of this widely used enzyme. The mature BnPA was ligated into the pET28a(+) vector and used to transform Escherichia coli Rosetta 2. Recombinant BnPA peroxidase was overexpressed and accumulated in inclusion bodies from which it was purified to homogeneity by immobilized metal affinity chromatography under denaturing conditions. Peroxidase activity was observed after a refolding process under oxidative conditions. The yield of pure recombinant BnPA was 29 mg L(-1) of culture with a specific activity of 981 ± 20 ABTS units mg(-1) at optimal conditions (pH 6, 45 °C). Recombinant BnPA showed similar kinetic properties compared to native turnip peroxidase, and its secondary structure evaluated by circular dichroism comprised 20% α-helix, 32% β-sheet and 48% random structure. Recombinant BnPA showed high yield and good kinetic properties which are key steps for future structure-function studies and biotechnological applications.
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