Arabidopsis RSS1 Mediates Cross-Talk Between Glucose and Light Signaling During Hypocotyl Elongation Growth
| Autor: | Aditi Gupta, Dhriti Singh, Manjul Singh, Ashverya Laxmi, Jitendra P. Khurana |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Light Mutant Arabidopsis lcsh:Medicine 01 natural sciences Article Hypocotyl 03 medical and health sciences Gene Expression Regulation Plant Botany Basic Helix-Loop-Helix Transcription Factors lcsh:Science Regulation of gene expression Multidisciplinary Auxin homeostasis biology Arabidopsis Proteins Chemistry lcsh:R fungi Nuclear Proteins Xyloglucan endotransglucosylase biology.organism_classification Cell biology DNA-Binding Proteins Glucose 030104 developmental biology Homeobox lcsh:Q Elongation Signal Transduction 010606 plant biology & botany |
| Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-18 (2017) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-017-16239-y |
| Popis: | Plants possess exuberant plasticity that facilitates its ability to adapt and survive under challenging environmental conditions. The developmental plasticity largely depends upon cellular elongation which is governed by a complex network of environmental and phytohormonal signals. Here, we report role of glucose (Glc) and Glc-regulated factors in controlling elongation growth and shade response in Arabidopsis. Glc controls shade induced hypocotyl elongation in a dose dependent manner. We have identified a Glc repressed factor REGULATED BY SUGAR AND SHADE1 (RSS1) encoding for an atypical basic helix-loop-helix (bHLH) protein of unknown biological function that is required for normal Glc actions. Phenotype analysis of mutant and overexpression lines suggested RSS1 to be a negative regulator of elongation growth. RSS1 affects overall auxin homeostasis. RSS1 interacts with the elongation growth-promoting proteins HOMOLOG OF BEE2 INTERACTING WITH IBH 1 (HBI1) and BR ENHANCED EXPRESSION2 (BEE2) and negatively affects the transcription of their downstream targets such as YUCs, INDOLE-3-ACETIC ACID INDUCIBLE (IAAs), LONG HYPOCOTYL IN FAR-RED1 (HFR1), HOMEOBOX PROTEIN 2 (ATHB2), XYLOGLUCAN ENDOTRANSGLUCOSYLASE/HYDROLASES (XTHs) and EXPANSINS. We propose, Glc signals might maintain optimal hypocotyl elongation under multiple signals such as light, shade and phytohormones through the central growth regulatory bHLH/HLH module. |
| Databáze: | OpenAIRE |
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