bHLH11 inhibits bHLH IVc proteins by recruiting the TOPLESS/TOPLESS-RELATED corepressors.

Iron (Fe) homeostasis is essential for plant growth and development. Many transcription factors (TFs) play pivotal roles in the maintenance of Fe homeostasis. bHLH11 is a negative TF that regulates Fe homeostasis.

Oryza sativa FER-LIKE FE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (OsFIT/OsbHLH156) interacts with OsIRO2 to regulate iron homeostasis.

Iron (Fe) is indispensable for the growth and development of plants. It is well known that FER-LIKE FE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT) is a key regulator of Fe uptake in Arabidopsis. Here, we identify the Oryza sativa FIT (also known as OsbHLH156) as the interacting partner of IRON-RELATED BHLH TRANSCRIPTION FACTOR 2 (OsIRO2) that is critical for regulating Fe uptake.

bHLH121 Functions as a Direct Link that Facilitates the Activation of FIT by bHLH IVc Transcription Factors for Maintaining Fe Homeostasis in Arabidopsis.

Iron (Fe) deficiency is prevalent in plants grown in neutral or alkaline soil. Plants have evolved sophisticated mechanisms that regulate Fe homeostasis, ensuring survival. In Arabidopsis, FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT) is a crucial regulator of Fe-deficiency response.

Oryza sativa POSITIVE REGULATOR OF IRON DEFICIENCY RESPONSE 2 (OsPRI2) and OsPRI3 are involved in the maintenance of Fe homeostasis.

Iron (Fe) is an essential micronutrient for plant growth development and plays a key role in regulating numerous cellular processes. In rice, OsHRZ1, an Fe-binding ubiquitin ligase, is a putative sensor of Fe homeostasis that negatively regulates iron acquisition. Despite its apparent importance, only a single basic-Helix-Loop-Helix (bHLH) transcription factor, OsPRI1, has been identified as a direct target of OsHRZ1.