Academic Editor: Marcello Iriti
Background: Crown root is the main part of root system, which
performs an important role in rice growth and development, especially in
nutrition and water assimilation. Previously, we reported negative feedback
regulation loop between Oryza sativa DNA BINDING WITH ONE FINGER 11
(OsDOF11) and cytokinin by Oryza sativa CYTOKININ
OXIDASE/DEHYDROGENASE 4 (OsCKX4) in rice development.
Methods: Reverse transcription quantitative RT-PCR analyses was
used to analyze the related gene transcript level. Nitrogen and hormone were
measured by CHN-Nitrogen analyser and Liquid chromatography mass spectrometer,
respectively. Exogenous application of cytokinin and [