PIF3 Is Involved in the Primary Root Growth Inhibition of Arabidopsis Induced by Nitric Oxide in the Light

• DOI: 10.1093/mp/sst142
• Publication Date: 2013-10-25T08:01:59Z
• Authors: Sulan Bai; Tao Yao; Miaomiao Li; Xiaomin Guo; Yaochuan Zhang; Shengwei Zhu; Yikun He
• Keywords: Phytochrome

PHYTOCHROME INTERACTING FACTOR3 (PIF3) is an important component in the phytochrome signaling pathway and mediates plant responses to various environmental conditions. We found that PIF3 involved inhibition of root growth Arabidopsis thaliana seedlings induced by nitric oxide (NO) light. Overexpression partially alleviated inhibitory effect NO on growth, whereas pif3-1 mutant displayed enhanced sensitivity terms growth. During signaling, photoreceptor PHYB degradation PIF3. phyB-9 had a similar phenotype PIF3ox responsiveness NO. Furthermore, treatment promoted accumulation PHYB, thus reduced content. Our results further show activity regulated DELLA protein RGL3[RGA (repressor ga1-3) LIKE 3]. Therefore, we speculate lies downstream RGL3, plays role