<i>Arabidopsis</i> TBP-ASSOCIATED FACTOR 12 ortholog NOBIRO6 controls root elongation with unfolded protein response cofactor activity
June‐Sik Kim, Yuki Sakamoto, Fuminori Takahashi, Michitaro Shibata, Kaoru Urano, Sachihiro Matsunaga, Kazuko Yamaguchi‐Shinozaki, Kazuo Shinozaki
Abstract
Significance Living organisms continuously rebalance their growth and defense/tolerance machineries upon environmental perturbation and energy limitation, which appear as trade-offs. The unfolded protein response (UPR) is a supposed underlying machinery for those trade-offs, responding to a broad spectrum of stress categories and modulating the fundamental growth in both animal and plant systems. We here report the incorporation of general transcription factor NOBIRO6/TAF12b into the UPR-mediated plant root growth control. This indicates that the gene regulation by UPR itself is a key to elucidate the growth trade-offs. Given previously reported roles of NOBIRO6/TAF12b in the signaling of two phytohormones, cytokinin and ethylene, our report proposes how multichannel signals interactively shape plants to survive and thrive in the wild.