Chrysanthemum CmHSFA4 gene positively regulates salt stress tolerance in transgenic chrysanthemum. Issue 7 (22nd January 2018)

• Record Type: Journal Article
• Authors: Li, Fei; Zhang, Huanru; Zhao, Husheng; Gao, Tianwei; Song, Aiping; Jiang, Jiafu; Chen, Fadi; Chen, Sumei
• Is Part Of: Plant biotechnology journal. Volume 16:Issue 7(2018)
• Page Start: 1311
• Page End: 1321
• Publication Date: 2018-01-22
• Subjects: salinity -- CmHSFA4 -- chrysanthemum -- overexpression -- ionic -- ROS; Plant biotechnology -- Periodicals; Plant genetic engineering -- Periodicals; 630.272
• DOI: 10.1111/pbi.12871
• Languages: English
• ISSNs: 1467-7644

Abstract

Summary: Salinity‐induced Na + toxicity and oxidative stress hamper plant growth. Here, we showed that expression of the chrysanthemum CmHSFA4, a homologue of the heat‐shock factor AtHSFA4a, is inducible by salt and localizes to the nucleus. It is a transcription activator binding with HSE. Chrysanthemum overexpressing CmHSFA4 displayed enhanced salinity tolerance by limiting Na + accumulation while maintaining K + concentration, which is consistent with the up‐regulation of ion transporters CmSOS1 and CmHKT2 . Additionally, the transgenic plants reduced H2 O2 and O2 ∙− accumulation under salinity, which could be due to up‐regulation of ROS scavenger activities such as SOD, APX and CAT as well as CmHSP70, CmHSP90 . Together, these results suggest that CmHSFA4 conferred salinity tolerance in chrysanthemum as a consequence of Na + /K + ion and ROS homeostasis.