Arabidopsis HD-Zip II proteins regulate the exit from proliferation during leaf development in canopy shade
| Autor: | Monica Carabelli, Marco Possenti, Giovanna Sessa, Ida Ruberti, Giorgio Morelli, Valentino Ruzza |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Canopy Cell division Light Physiology Arabidopsis Plant Science 01 natural sciences Hypocotyl HD-Zip II transcription factors 03 medical and health sciences Shade avoidance Botany Arabidopsis thaliana shade avoidance response Animals Primordium Growth and Developmen Transcription factor health care economics and organizations Cell Proliferation Homeodomain Proteins biology Arabidopsis Proteins fungi food and beverages social sciences 15. Life on land biology.organism_classification Research Papers humanities light quality changes Plant Leaves HFR1/SICS1 030104 developmental biology leaf development 010606 plant biology & botany Transcription Factors |
| Zdroj: | Journal of Experimental Botany Journal of experimental botany (Online) 69 (2018): 5419–5431. doi:10.1093/jxb/ery331 info:cnr-pdr/source/autori:Carabelli M.; Possenti M.; Sessa G.; Ruzza V.; Morelli G.; Ruberti I./titolo:Arabidopsis HD-Zip II proteins regulate the exit from proliferation during leaf development in canopy shade/doi:10.1093%2Fjxb%2Fery331/rivista:Journal of experimental botany (Online)/anno:2018/pagina_da:5419/pagina_a:5431/intervallo_pagine:5419–5431/volume:69 |
| ISSN: | 1460-2431 |
| DOI: | 10.1093/jxb/ery331 |
| Popis: | Prolonged shade determines early exit from proliferation in the Arabidopsis leaf through the concerted action of ATHB2 and ATHB4 HD-Zip II proteins. The shade avoidance response is mainly evident as increased plant elongation at the expense of leaf and root expansion. Despite the advances in understanding the mechanisms underlying shade-induced hypocotyl elongation, little is known about the responses to simulated shade in organs other than the hypocotyl. In Arabidopsis, there is evidence that shade rapidly and transiently reduces the frequency of cell division in young first and second leaf primordia through a non-cell-autonomous mechanism. However, the effects of canopy shade on leaf development are likely to be complex and need to be further investigated. Using combined methods of genetics, cell biology, and molecular biology, we uncovered an effect of prolonged canopy shade on leaf development. We show that persistent shade determines early exit from proliferation in the first and second leaves of Arabidopsis. Furthermore, we demonstrate that the early exit from proliferation in the first and second leaves under simulated shade depends at least in part on the action of the Homeodomain-leucine zipper II (HD-Zip II) transcription factors ARABIDOPSIS THALIANA HOMEOBOX2 (ATHB2) and ATHB4. Finally, we provide evidence that the ATHB2 and ATHB4 proteins work in concert. Together the data contribute new insights on the mechanisms controlling leaf development under canopy shade. |
| Databáze: | OpenAIRE |
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