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CmTCP20 Plays a Key Role in Nitrate and Auxin Signaling-Regulated Lateral Root Development in Chrysanthemum
- Source :
- Plantcell physiology. 60(7)
- Publication Year :
- 2018
-
Abstract
- Lateral root (LR) formation and development play a vital role in plant development by permitting the establishment of branched root systems. It is well known that nutrient availability controls LR development. Moreover, LR development is fine-tuned by a myriad of hormonal signals. Many transcription factors (TFs) participate in LR development. Here, we discuss the TFs involved in the nitrate and auxin signaling pathways and how these function in the regulation of LR formation and development in chrysanthemum. AtTCP20 is a plant-specific TF, which can modulate LR development in response to nitrate. The roles of CmTCP20 in LR development were identified by overexpression in chrysanthemum and heterologous expression in Arabidopsis. Overexpression of CmTCP20 significantly increased the number and average length of LRs compared with the wild type in chrysanthemum and Arabidopsis. We also found that CmTCP20 positively influenced auxin accumulation in the LRs at least partly by improving auxin biosynthesis, transport and response, thereby promoting LR development. Moreover, we found that CmTCP20 interacts with an auxin response factor, CmARF8, which also can be induced by nitrate and combined to proximal sites in the upstream promoter region of CmCYCB1;1 to positively regulate the cell cycle. The CmTCP20-CmARF8 heterodimer links nitrate and auxin signaling and converts cell-cycle signals to regulate LR initiation and growth.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Physiology
Chrysanthemum
Arabidopsis
Plant Science
01 natural sciences
Plant Roots
03 medical and health sciences
Plant Growth Regulators
Auxin
Transcription factor
Plant Proteins
chemistry.chemical_classification
Nitrates
biology
Indoleacetic Acids
fungi
Lateral root
Wild type
food and beverages
Promoter
Cell Biology
General Medicine
biology.organism_classification
Plants, Genetically Modified
Cell biology
030104 developmental biology
chemistry
Heterologous expression
Function (biology)
010606 plant biology & botany
Signal Transduction
Transcription Factors
Subjects
Details
- ISSN :
- 14719053
- Volume :
- 60
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Plantcell physiology
- Accession number :
- edsair.doi.dedup.....6e34e32c0e7dc901875f5c010648dd27