The MYB transcription factor OsMYBxoc1 regulates resistance to Xoc by directly repressing transcription of the iron transport gene OsNRAMP5 in rice

• DOI: 10.1016/j.xplc.2024.100859
• Publication Date: 2024-03-05T03:09:18Z
• Authors: Haimiao Zhang; Baolong Sun; Wei Wu; Yang Li; Ziyi Yin; Chongchong Lu; Haipeng Zhao; Lingguang Kong; Xinhua Ding
• Keywords: MYB; Transcription

Bacterial leaf streak caused by Xanthomonas oryzae pv. oryzicola (Xoc) is a continuous threat to rice cultivation, leading substantial yield losses with socioeconomic implications. Iron ions are essential mineral nutrients for plant growth, but little information available on how they influence mechanisms of immunity against Xoc. Here, we investigated the role myeloblastosis-related (MYB) transcriptional repressor OsMYBxoc1 in modulation resistance through control iron ion transport. Overexpression significantly increased resistance, whereas RNA-interference lines and knockout mutants showed opposite result. Suppression expression dampened immune response induced pathogen-associated molecular patterns. We demonstrated that binds specifically OsNRAMP5 promoter represses transcription OsNRAMP5. OsNRAMP5, negative regulator bacterial streak, possesses metal transport activity, inhibition content rice. Activity ion-dependent H