title: CpLEA5, the Late Embryogenesis Abundant Protein Gene from Chimonanthus praecox, Possesses Low Temperature and Osmotic Resistances in Prokaryote and Eukaryotes.
abstract: Plants synthesize and accumulate a series of stress-resistance proteins to protect normal physiological activities under adverse conditions. Chimonanthus praecox which blooms in freezing weather accumulates late embryogenesis abundant proteins (LEAs) in flowers, but C. praecox LEAs are little reported. Here, we report a group of five LEA genes of C. praecox (CpLEA5, KT727031). Prokaryotic-expressed CpLEA5 was employed in Escherichia coli to investigate bioactivities and membrane permeability at low-temperature. In comparison with the vacant strains, CpLEA5-containing strains survived in a 20% higher rate; and the degree of cell membrane damage in CpLEA5-containing strains was 55% of that of the vacant strains according to a conductivity test, revealing the low-temperature resistance of CpLEA5 in bacteria. CpLEA5 was also expressed in Pichia pastoris. Interestingly, besides low-temperature resistance, CpLEA5 conferred high resistance to salt and alkali in CpLEA5 overexpressing yeast. The CpLEA5 gene was transferred into Arabidopsis thaliana to also demonstrate CpLEA5 actions in plants. As expected, the transgenic lines were more resistant against low-temperature and drought while compared with the wild type. Taken together, CpLEA5-conferred resistances to several conditions in prokaryote and eukaryotes could have great value as a genetic technology to enhance osmotic stress and low-temperature tolerance.
authors.affiliation: College of Plant Sciences, Jilin University, Changchun 130062, China. liuyiling21th@126.com.
authors.forename: Yiling
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Plant Sciences, Jilin University, Changchun 130062, China. xialixia128@163.com.
authors.forename: Lixia
authors.initials: L
authors.lastname: Xie
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China. xlliang09@mails.jlu.edu.cn.
authors.forename: Xilong
authors.initials: X
authors.lastname: Liang
authors.affiliation: College of Plant Sciences, Jilin University, Changchun 130062, China. zhang_sh@jlu.edu.cn.
authors.forename: Shihong
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000220:Adaptation, Biological / Q000235:genetics*; D000595:Amino Acid Sequence; D002462:Cell Membrane / Q000378:metabolism; D002463:Cell Membrane Permeability; D003080:Cold Temperature; D055864:Droughts; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D008969:Molecular Sequence Data; D009997:Osmotic Pressure; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D030821:Plants, Genetically Modified; D016415:Sequence Alignment; D013312:Stress, Physiological / Q000235:genetics*; D064028:Tracheophyta / Q000235:genetics* / Q000378:metabolism*
chemical_list: D010940:Plant Proteins
keywords: Chimonanthus praecox; late embryogenesis abundant protein (LEA); low-temperature resistance