[an error occurred while processing this directive]

Hereditas(Beijing) ›› 2017, Vol. 39 ›› Issue (9): 837-846.doi: 10.16288/j.yczz.17-113

Previous Articles     Next Articles

Drought stress modulates diurnal oscillations of circadian clock and drought-responsive genes in Oryza sativa L.

Jia Li(),Yunhua Liu,Yu Zhang,Chen Chen,Xia Yu,Shunwu Yu()   

  1. Shanghai Agrobiological Gene Center, Shanghai 201106, China
  • Received:2017-03-29 Revised:2017-06-22 Online:2017-09-20 Published:2017-10-21
  • Supported by:
    the National Science and Technology Major Project of the Ministry of Science and Technology of China(2016ZX08001-003);the National Natural Science Foundation of China(31371229);the Natural Science Foundation of Shanghai(17ZR1425400)

RichHTML

10

PDF (PC)

1404

Abstract:

Endogenous circadian rhythms play a key role in regulating plant growth and development, and in allowing plants to respond and adapt to changing environments. To understand how drought regulates upland rice(Oryza sativa L.) IRAT109, we examined the expression levels of circadian clock and drought-responsive genes through real-time PCR. The results revealed that, first, drought reduced the relative expression level and amplitude of peak expression of several morning circadian clock components (such as OsPRRs, OsLHY and OsZTL1), increased the relative expression level and amplitude of some evening circadian clock components (such as OsTOC1, OsGI and OsELF3), but did not influence OsFKF1. Secondly, the relative expression level of most drought-responsive genes was generally increased, except for OsDST, a negative regulator. Lastly, expression rhythms of most drought-responsive genes were disturbed, but not that of OsCIPK12, OsCDPK7 and OsDREB1A. The results indicate that drought stress modulates the expression of circadian clock components and the interplay regulates diurnal oscillations of relative genes.

Key words: drought stress, Oryza sativa L., circadian clock genes, stress responsive genes