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Neighbor detection at the leaf tip adaptively regulates upward leaf movement through spatial auxin dynamics
- Source :
- Proceedings of the National Academy of Sciences of the United States of America, 114(28), 7450-7455, Proceedings of the National Academy of Sciences of the United States of America 114 (2017) 28, Proceedings of the National Academy of Sciences of the United States of America, 114(28). National Academy of Sciences
- Publication Year :
- 2017
-
Abstract
- Vegetation stands have a heterogeneous distribution of light quality, including the red/far-red light ratio (R/FR) that informs plants about proximity of neighbors. Adequate responses to changes in R/FR are important for competitive success. How the detection and response to R/FR are spatially linked and how this spatial coordination between detection and response affects plant performance remains unresolved. We show in Arabidopsis thaliana and Brassica nigra that localized FR enrichment at the lamina tip induces upward leaf movement (hyponasty) from the petiole base. Using a combination of organ-level transcriptome analysis, molecular reporters, and physiology, we show that PIF-dependent spatial auxin dynamics are key to this remote response to localized FR enrichment. Using computational 3D modeling, we show that remote signaling of R/FR for hyponasty has an adaptive advantage over local signaling in the petiole, because it optimizes the timing of leaf movement in response to neighbors and prevents hyponasty caused by self-shading.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Shade avoidance
Genotype
Light
Arabidopsis
Biology
Genes, Plant
01 natural sciences
Petiole (botany)
03 medical and health sciences
Imaging, Three-Dimensional
Gene Expression Regulation, Plant
Auxin
Botany
Arabidopsis thaliana
Computer Simulation
chemistry.chemical_classification
Multidisciplinary
Indoleacetic Acids
Phytochrome
Arabidopsis Proteins
Dynamics (mechanics)
fungi
food and beverages
Biological Sciences
15. Life on land
biology.organism_classification
PE&RC
Leaf movement
Hypocotyl
Functional-structural plant model
Plant Leaves
030104 developmental biology
chemistry
Seedlings
Mutation
Biophysics
Centre for Crop Systems Analysis
Transcriptome
Crop and Weed Ecology
Signal Transduction
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America, 114(28), 7450-7455, Proceedings of the National Academy of Sciences of the United States of America 114 (2017) 28, Proceedings of the National Academy of Sciences of the United States of America, 114(28). National Academy of Sciences
- Accession number :
- edsair.doi.dedup.....0515c61514dc1a3bb52c4a66b7734011