NDLI: Chrysanthemum WRKY gene CmWRKY17 negatively regulates salt stress tolerance in transgenic chrysanthemum and Arabidopsis plants.

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Chrysanthemum WRKY gene CmWRKY17 negatively regulates salt stress tolerance in transgenic chrysanthemum and Arabidopsis plants.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Li, Peiling Song, Aiping Gao, Chunyan Wang, Linxiao Wang, Yinjie Sun, Jing Jiang, Jiafu Chen, Fadi Chen, Sumei
Description	Country affiliation: China Author Affiliation: Li P ( College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.)
Abstract	KEY MESSAGE: CmWRKY17 was induced by salinity in chrysanthemum, and it might negatively regulate salt stress in transgenic plants as a transcriptional repressor. WRKY transcription factors play roles as positive or negative regulators in response to various stresses in plants. In this study, CmWRKY17 was isolated from chrysanthemum (Chrysanthemum morifolium). The gene encodes a 227-amino acid protein and belongs to the group II WRKY family, but has an atypical WRKY domain with the sequence WKKYGEK. Our data indicated that CmWRKY17 was localized to the nucleus in onion epidermal cells. CmWRKY17 showed no transcriptional activation in yeast; furthermore, luminescence assay clearly suggested that CmWRKY17 functions as a transcriptional repressor. DNA-binding assay showed that CmWRKY17 can bind to W-box. The expression of CmWRKY17 was induced by salinity in chrysanthemum, and a higher expression level was observed in the stem and leaf compared with that in the root, disk florets, and ray florets. Overexpression of CmWRKY17 in chrysanthemum and Arabidopsis increased the sensitivity to salinity stress. The activities of superoxide dismutase and peroxidase and proline content in the leaf were significantly lower in transgenic chrysanthemum than those in the wild type under salinity stress, whereas electrical conductivity was increased in transgenic plants. Expression of the stress-related genes AtRD29, AtDREB2B, AtSOS1, AtSOS2, AtSOS3, and AtNHX1 was reduced in the CmWRKY17 transgenic Arabidopsis compared with that in the wild-type Col-0. Collectively, these data suggest that CmWRKY17 may increase the salinity sensitivity in plants as a transcriptional repressor.
File Format	HTM / HTML
ISSN	07217714
Issue Number	8
Volume Number	34
e-ISSN	1432203X
Journal	Plant Cell Reports
Language	English
Publisher	Springer
Publisher Date	2015-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany Arabidopsis Genetics Chrysanthemum Plant Proteins Plants, Genetically Modified Salt-tolerance Transcription Factors Physiology Gene Expression Regulation, Plant Genes, Plant Analysis Subcellular Fractions Chemistry Two-hybrid System Techniques Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Plant Science Medicine Agronomy and Crop Science

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Chrysanthemum WRKY gene CmWRKY17 negatively regulates salt stress tolerance in transgenic chrysanthemum and Arabidopsis plants.

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