Expression of maize calcium‐dependent protein kinase (ZmCPK11) improves salt tolerance in transgenic Arabidopsis plants by regulating sodium and potassium homeostasis and stabilizing photosystem II

• DOI: 10.1111/ppl.12938
• Publication Date: 2019-02-04T09:00:05Z
• Authors: Lidia Borkiewicz; Lidia Polkowska‐K...; Jarosław Cieśla; Paweł Sowiński; Maciej Jończyk; Wojciech Rymaszewski; Katarzyna P. Szym...; Radosław Jaźwiec; Grażyna Muszyńska; Jadwiga Szczegiel...
• Keywords: Jasmonic acid

In plants, CALCIUM-DEPENDENT PROTEIN KINASES (CDPKs/CPKs) are involved in calcium signaling response to endogenous and environmental stimuli. Here, we report that ZmCPK11, one of maize CDPKs, participates salt stress tolerance. Salt induced expression upregulated the activity ZmCPK11 roots leaves. Activation upon was also observed leaves transgenic Arabidopsis plants expressing ZmCPK11. The showed a long-root phenotype under control conditions short-root NaCl, abscisic acid (ABA) or jasmonic (JA) treatment. Analysis ABA JA content indicated can mediate root growth by regulating levels these phytohormones. Moreover, 4-week-old were more tolerant salinity than wild-type plants. Their less chlorotic weaker symptoms senescence accompanied higher chlorophyll quantum efficiency photosystem II. Na+ /K+ transporters (HKT1, SOS1 NHX1) transcription factors (CBF1, CBF2, CBF3, ZAT6 ZAT10) with known links tolerance stress. Furthermore, accumulated salinity, K+ /Na+ ratio These results show improved ZmCPK11-transgenic could be due an upregulation genes maintenance intracellular homeostasis protection II against damage.