Abstract
Iron (Fe) is a plentiful element in the Earth’s crust, but it is not easily accessible to plants. Its deficiency, as well as toxicity, leads to low yield and poor grain quality in crops. Transcription factors (TFs) act as molecular switches to control responses to deficiency and toxicity of Fe. The bHLH TFs are master regulators of genes engaged in the Fe-deficiency response in rice while TFs belonging to the WRKY family probably modulate response to Fe toxicity. The present chapter elucidates the current understanding regarding the regulatory mechanism underlying Fe homeostasis in rice.
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