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  • Molecular mechanism for jasmonate-induction of anthocyanin accumulation . . .
    In this study, genetic, molecular, and physiological approaches were used to reveal the molecular basis of JA-regulated pigmentation in Arabidopsis It was found that the F-box protein COI1 was required for JA-specific induced expression of the ‘late’ anthocyanin biosynthetic genes DFR, LDOX, and UF3GT
  • WRKY33 negatively regulates anthocyanin biosynthesis and cooperates . . .
    Anthocyanin accumulation is acknowledged as a phenotypic indicator of phosphate (Pi) starvation However, negative regulators of this process and their molecular mechanisms remain largely unexplored In this study, we demonstrate that WRKY33 acts as a negative regulator of phosphorus-status-dependent anthocyanin biosynthesis
  • 【学术前沿】Plant Cell | 中科院版纳植物园胡彦如研究组 . . .
    分子机理研究表明，磷信号核心转录因子PHR1、PHL2和PHL3能与JA信号途径JAZ抑制子相互作用形成复合体。 表型分析发现，PHR1、PHL2和PHL3正调控JA诱导的花青素积累和根生长抑制。 与野生型植株相比，phr1相关双突变体或三突变体对JA敏感性下降（图1），而过表达PHR1、PHL2或PHL3的转基因植株则对JA超敏感。 相一致的是，PHR1通过结合启动子序列，直接激活某些JA响应基因的表达，而JAZ蛋白能拮抗PHR1的转录功能。 进一步研究表明，PHR1还能与JA途径核心转录因子MYC2、MYC3和MYC4互作形成蛋白复合体。 表型分析发现，当MYC2、MYC3和MYC4功能缺失时，低磷胁迫不能有效激活JA信号转导过程。
  • Plant Physiol. | 清华大学刘栋团队揭示PHR1家族四个成员在 . . .
    另外，清华大学刘栋教授团队还发现该家族中的另外三个成员PHL2，PHL3，和PHL4在植物对低磷胁迫的转录响应中也起着一定作用 （Sun et al , 2016，Wang et al , 2018） 。PHL2和PHL3之间能够直接互作，并且结合在编码根表面酸性磷酸酶的AtPAP10基因
  • PHR1 positively regulates phosphate starvation-induced . . . - PubMed
    Taken together, these results indicate that PHR1 positively regulates Pi starvation-induced anthocyanin accumulation in Arabidopsis, at least in part, by directly binding the P1BS motifs located on the promoters to upregulate the transcription of anthocyanin biosynthetic genes F3'H and LDOX
  • PHR1 positively regulates phosphate starvation-induced anthocyanin . . .
    PHOSPHATE STARVATION RESPONSE1 (PHR1), which encodes a key factor involved in Pi starvation signaling in Arabi-dopsis, signicantly attenuates anthocyanin accumulation under Pi-limiting conditions Moreover, the expression of several Pi deciency-upregulated genes that are involved in anthocyanin biosyntheses, such as avanone 3’-hydroxylaseF3'H (),
  • Molecular mechanism of phosphorous signaling inducing anthocyanin . . .
    Here, we provided evidence that the P signaling core protein PHOSPHATE STARVATION RESPONSE1 (PHR1) is physically associate with transcription factors (TFs) involved in anthocyanidin biosynthesis, including PRODUCTION OF ANTHOCYANIN PIGMENTS1 (PAP1 MYB75), MYB DOMAIN PROTEIN 113 (MYB113) and TRANSPARENT TESTA 8 (TT8)
  • Arabidopsis PHL2 and PHR1 Act Redundantly as the Key . . . - PubMed
    RNA-sequencing analyses indicated that the transcription of most Pi starvation-induced genes is impaired in the phl2 mutant, indicating that PHL2 is also a key component of the central regulatory system Finally, we showed that PHL2, and perhaps also PHL3, acts redundantly with PHR1 to regulate plant transcriptional response to Pi starvation
  • PHOSPHATE RESPONSE 1 family members act distinctly to regulate . . .
    Based on these results, we concluded that the PHR1 PHL1 module has a large effect on PSI inhibition of PR growth, on the activity of root-associated APases induced by Pi starvation, and on the maintenance of Pi homeostasis; in contrast, the effects of the PHL2 PHL3 module on these Pi responses were not substantial





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