Details

Autor(en) / Beteiligte

• Xu, Yang
• Yu, Zipeng
• Zhang, Shizhong
• Wu, Changai
• Yang, Guodong
• Yan, Kang
• Zheng, Chengchao
• Huang, Jinguang

Titel

CYSTM3 negatively regulates salt stress tolerance in Arabidopsis

Ist Teil von

• Plant molecular biology, 2019-03, Vol.99 (4-5), p.395-406

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2019

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Key message CYSTM3, a small mitochondrial protein, acts as a negative regulator in salt stress response by preventing Na +  efflux and disturbing reactive oxygen species (ROS) homeostasis in Arabidopsis . Cysteine-rich transmembrane module (CYSTM) is a not well characterized small peptide family in plants. In this study, we identified a novel mitochondrion-localized CYSTM member CYSTM3 from Arabidopsis , which was ubiquitously expressed in different tissues and dramatically induced by salt stress. Transgenic plants overexpressing CYSTM3 (OE) displayed hypersensitivity to salt stress compared with wild type (WT) plants, whereas a knockout mutant cystm3 was more tolerant to high salinity than WT. Moreover, OE lines accumulated higher contents of Na + and ROS than WT and cystm3 upon exposure to high salinity. Further analysis revealed that CYSTM3 could deter root Na + efflux and inhibit the activities of a range of ROS scavenging enzymes in Arabidopsis . In addition, the transcripts of nuclear salt stress-responsive genes were over-activated in cystm3 than those in WT and OE lines. Taken together, Arabidopsis CYSTM3 acts as a negative regulator in salt stress tolerance.