Canopy shade causes a rapid and transient arrest in leaf development through auxin-induced cytokinin oxidase activity
| Autor: | Massimiliano Sassi, Monica Carabelli, Marco Possenti, Andrea Ciolfi, Giovanna Sessa, Ida Ruberti, Giorgio Morelli |
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| Rok vydání: | 2007 |
| Předmět: |
Canopy
genetics/metabolism plant Biology Hypocotyl Research Communication Gene Expression Regulation Plant Genes Reporter Auxin Arabidopsis Botany reporter Genetics developmental Primordium photobiology genes arabidopsis gene expression regulation genetically modified genetics genetics/growth /&/ development/metabolism/radiation effects glucuronidase growth /&/ development/metabolism/radiation effects indoleacetic acids metabolism oxidoreductases plant leaves plants signal transduction chemistry.chemical_classification fungi Gene Expression Regulation Developmental food and beverages Plants Genetically Modified biology.organism_classification light quality changes chemistry Photobiology shade avoidance response Elongation Signal transduction leaf development auxin signaling Developmental Biology |
| Zdroj: | Genes & development 21 (2007): 1863–1868. doi:10.1101/gad.432607 info:cnr-pdr/source/autori:M Carabelli (1); M Possenti (2); G Sessa (1); A Ciolfi (1); M Sassi (1); G Morelli (2); I Ruberti (1)./titolo:Canopy shade causes a rapid and transient arrest in leaf development through auxin-induced cytokinin oxidase activity./doi:10.1101%2Fgad.432607/rivista:Genes & development/anno:2007/pagina_da:1863/pagina_a:1868/intervallo_pagine:1863–1868/volume:21 |
| ISSN: | 1549-5477 0890-9369 |
| DOI: | 10.1101/gad.432607 |
| Popis: | A plant grown under canopies perceives the reduction in the ratio of red (R) to far-red (FR) light as a warning of competition, and enhances elongation growth in an attempt to overgrow its neighbors. Here, we report that the same low R/FR signal that induces hypocotyl elongation also triggers a rapid arrest of leaf primordium growth, ensuring that plant resources are redirected into extension growth. The growth arrest induced by low R/FR depends on auxin-induced cytokinin breakdown in incipient vein cells of developing primordia, thus demonstrating the existence of a previously unrecognized regulatory circuit underlying plant response to canopy shade. |
| Databáze: | OpenAIRE |
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