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ANAC044 modulates P reutilization in P deficient Arabidopsis thaliana root cell wall in an ethylene dependent manner
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  • Qi Wu,
  • ye Tao,
  • xiaolong Zhang,
  • Xiao Fang Zhu,
  • Ren Fang Shen
Qi Wu
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
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ye Tao
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
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xiaolong Zhang
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
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Xiao Fang Zhu
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
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Ren Fang Shen
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
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Abstract

Phosphorus (P) deficiency is a major problem in agriculture, thus identifying factors affecting plant’s ability to reutilize previously assimilated P is a prerequisite for improving the P homeostasis in crops grown with P deficient soil. Here, we report the involvement of a NAC (No apical meristem [NAM], Arabidopsis transcription activation factor [ATAF] and Cup-shaped cotyledon [CUC]) transcription factor in P deficiency resistance in Arabidopsis. Compared to the wild type (WT, Col-0) plants, the anac044 mutant displayed P deficiency resistant phenotype, together with the increasing root length, root and shoot biomass under P deficiency. ANAC044 was frequently expressed, including roots and shoots. Upon P deficient treatment even within 1 d, ANAC044 transcript accumulation was strongly up-regulated. Further analysis revealed that, under P-deficient condition, the cell wall, particularly the pectin of anac044, released more P than that of WT, accompanied by an increment of ethylene production, as a result, more soluble P was available in anac044 root and shoot. Thus, the study here uncovers the role of ANAC044 in maintenance of P homeostasis through ethylene signaling.

Peer review status:POSTED

06 Jul 2020Submitted to Plant, Cell & Environment
07 Jul 2020Assigned to Editor
07 Jul 2020Submission Checks Completed