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- W2061047860 endingPage "1141" @default.
- W2061047860 startingPage "1126" @default.
- W2061047860 abstract "Light and temperature, in coordination with the endogenous clock and the hormones gibberellin (GA) and brassinosteroids (BRs), modulate plant growth and development by affecting the expression of multiple cell wall- and auxin-related genes. PHYTOCHROME INTERACTING FACTORS (PIFs) play a central role in the activation of these genes, the activity of these factors being regulated by the circadian clock and phytochrome-mediated protein destabilization. GA signaling is also integrated at the level of PIFs; the DELLA repressors are found to bind these factors and impair their DNA-binding ability. The recent finding that PIFs are co-activated by BES1 and BZR1 highlights a further role of these regulators in BR signal integration, and reveals that PIFs act in a concerted manner with the BR-related BES1/BZR1 factors to activate auxin synthesis and transport at the gene expression level, and synergistically activate several genes with a role in cell expansion. Auxins feed back into this growth regulatory module by inducing GA biosynthesis and BES1/BZR1 gene expression, in addition to directly regulating several of these growth pathway gene targets. An exciting challenge in the future will be to understand how this growth program is dynamically regulated in time and space to orchestrate differential organ expansion and to provide plants with adaptation flexibility. Contents Summary 1126 I. Introduction 1126 II. Light and phytochrome signaling 1127 III. Phytochrome regulation of PIF activity 1128 IV. Developmental processes regulated by PIFs 1128 V. PIFs and hormonal control of light signaling 1129 VI. Role of PIFs in diurnal control of cell elongation 1132 VII. Response to vegetational shade 1135 VIII. PIF control of responses to elevated temperatures 1136 IX. Concluding remarks and future perspectives 1136 Acknowledgements 1137 References 1137" @default.
- W2061047860 created "2016-06-24" @default.
- W2061047860 creator A5004331951 @default.
- W2061047860 creator A5050849672 @default.
- W2061047860 date "2014-02-26" @default.
- W2061047860 modified "2023-10-18" @default.
- W2061047860 title "<scp>PIF</scp> s get <scp>BR</scp> right: <scp>PHYTOCHROME INTERACTING FACTOR</scp> s as integrators of light and hormonal signals" @default.
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