Abstract:
KEY MESSAGE:A novel Zoysia japonica salt-induced glycine-rich RNA-binding protein gene was cloned in this study and its overexpression caused salt sensitivity in transgenic Arabidopsis. Glycine-rich RNA-binding proteins (GRPs) play crucial roles in diverse plant developmental processes. However, the mechanisms and functions of GRPs in salinity stress responses remain largely unknown. In this study, rapid amplification of cDNA end (RACE) PCR methods was adopted to isolate ZjGRP from Zosyia japonica, a salt-tolerant grass species. ZjGRP cDNA was 456 bp in length, corresponding to 151 amino acids. ZjGRP was localized in the nucleus and cytoplasm, and was found particularly abundantly in stomatal guard cells. Quantitative real-time PCR showed that ZjGRP was expressed in the roots, stems, and leaves of Zoysia japonica, with the greatest expression seen in the fast-growing leaves. Furthermore, expression of ZjGRP was strongly induced by treatment with NaCl, ABA, MeJA, and SA. Overexpression of ZjGRP in Arabidopsis reduced the rate of germination and retarded seedling growth. ZjGRP-overexpressing Arabidopsis thaliana exhibited weakened salinity tolerance, likely as a result of effects on ion transportation, osmosis, and antioxidation. This study indicates that ZjGRP plays an essential role in inducing salt sensitivity in transgenic plants.
journal_name
Plant Cell Repjournal_title
Plant cell reportsauthors
Teng K,Tan P,Xiao G,Han L,Chang Z,Chao Ydoi
10.1007/s00299-016-2068-xsubject
Has Abstractpub_date
2017-01-01 00:00:00pages
179-191issue
1eissn
0721-7714issn
1432-203Xpii
10.1007/s00299-016-2068-xjournal_volume
36pub_type
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