scholarly journals Auxin signaling modulates LATERAL ROOT PRIMORDIUM 1 ( LRP 1 ) expression during lateral root development in Arabidopsis

2019 ◽  
Vol 101 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Sharmila Singh ◽  
Sandeep Yadav ◽  
Alka Singh ◽  
Mahima Mahima ◽  
Archita Singh ◽  
...  
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Auxin Signaling ◽  
Lateral Root Development ◽  
Lateral Root Primordium ◽  
Root Primordium

Lateral root development in a woody plant, Quercus suber L. (cork oak)

2000 ◽  
Vol 78 (9) ◽  
pp. 1125-1135
Author(s):  
Dolors Verdaguer ◽  
Pedro J Casero ◽  
Marisa Molinas
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Root Meristem ◽  
Lateral Roots ◽  
Quercus Suber ◽  
Cork Oak ◽  
Vascular Connection ◽  
Lateral Root Development ◽  
Lateral Root Primordium ◽  
Root Primordium

The distribution and the ontogenesis of lateral roots have been investigated in the Mediterranean woody species Quercus suber L. (cork oak). Lateral roots arose in protoxylem-based ranks and a tendency to clumping was observed. Three stages are distinguished in lateral root primordium development. Lateral root primordia are derived mainly from pericycle cells. The endodermis contributed to the initial lateral root development, forming an endodermal cover that sloughs off with lateral root emergence. The unemerged lateral roots show an incipient layered root meristem; this meristem can be classified as a closed type meristem. Primary vascular connection takes place with the xylem strand opposite the lateral root primordium and the two adjacent phloem strands. Primary vascular connector elements are derived from pericyclic derivative cells. Vascular parenchyma cells contribute mainly in the development of the cambium and the subsequent secondary xylem and phloem connector elements. The secondary vascular elements of the lateral root and parent root differentiate in continuity. Vascular connection is discussed in relation to the root vascular plexus described in monocotyledonous and in some herbaceous dicotyledonous plants. An endodermis with suberized lamellae is continuous between the lateral and parent root in emerged lateral roots.Key words: lateral root, development pattern, apical lateral root meristem, root vascular connection, Quercus suber L.

scholarly journals Noncanonical auxin signaling regulates cell division pattern during lateral root development

2019 ◽  
Vol 116 (42) ◽  
pp. 21285-21290 ◽  
Author(s):  
Rongfeng Huang ◽  
Rui Zheng ◽  
Jun He ◽  
Zimin Zhou ◽  
Jiacheng Wang ◽  
...  
Keyword(s):  
Cell Division ◽  
Root Development ◽  
Lateral Root ◽  
Control Cell ◽  
Mapk Signaling ◽  
Mitogen Activated Protein Kinase ◽  
Auxin Signaling ◽  
Lateral Root Development ◽  
Division Pattern ◽  
Mitogen Activated Protein

In both plants and animals, multiple cellular processes must be orchestrated to ensure proper organogenesis. The cell division patterns control the shape of growing organs, yet how they are precisely determined and coordinated is poorly understood. In plants, the distribution of the phytohormone auxin is tightly linked to organogenesis, including lateral root (LR) development. Nevertheless, how auxin regulates cell division pattern during lateral root development remains elusive. Here, we report that auxin activates Mitogen-Activated Protein Kinase (MAPK) signaling via transmembrane kinases (TMKs) to control cell division pattern during lateral root development. Both TMK1/4 and MKK4/5-MPK3/6 pathways are required to properly orient cell divisions, which ultimately determine lateral root development in response to auxin. We show that TMKs directly and specifically interact with and phosphorylate MKK4/5, which is required for auxin to activate MKK4/5-MPK3/6 signaling. Our data suggest that TMK-mediated noncanonical auxin signaling is required to regulate cell division pattern and connect auxin signaling to MAPK signaling, which are both essential for plant development.

scholarly journals PRH1 mediates ARF7-LBD dependent auxin signaling to regulate lateral root development in Arabidopsis thaliana

2019 ◽  
Author(s):  
Feng Zhang ◽  
Wenqing Tao ◽  
Ruiqi Sun ◽  
Junxia Wang ◽  
Cuiling Li ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factors ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Roots ◽  
Auxin Signaling ◽  
Auxin Response ◽  
Cell Identity ◽  
Lateral Root Development ◽  
Lateral Organ

AbstractThe development of lateral roots in Arabidopsis thaliana is strongly dependent on signaling directed by the AUXIN RESPONSE FACTOR7 (ARF7), which in turn activates LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, 18, 29 and 33). Here, the product of PRH1, a PR-1 homolog annotated previously as encoding a pathogen-responsive protein, was identified as a target of ARF7-mediated auxin signaling and also as participating in the development of lateral roots. PRH1 was shown to be strongly induced by auxin treatment, and plants lacking a functional copy of PRH1 formed fewer lateral roots. The transcription of PRH1 was controlled by the binding of both ARF7 and LBDs to its promoter region. An interaction was detected between PRH1 and GATA23, a protein which regulates cell identity in lateral root founder cells.Author SummaryIn Arabidopsis thaliana AUXIN RESPONSE FACTOR7 (ARF7)-mediated auxin signaling plays a key role in lateral roots (LRs) development. The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, 18, 29 and 33) act downstream of ARF7-mediated auxin signaling to control LRs formation. Here, the PR-1 homolog PRH1 was identified as a novel target of both ARF7 and LBDs (especially the LBD29) during auxin induced LRs formation, as both ARF7 and LBDs were able to bind to the PRH1 promoter. More interestingly, PRH1 has a physical interaction with GATA23, which has been also reported to be up-regulated by auxin and influences LR formation through its regulation of LR founder cell identity. Whether the interaction between GATA23 and PRH1 affects the stability and/or the activity of either (or both) of these proteins remains an issue to be explored. This study provides improves new insights about how auxin regulates lateral root development.

scholarly journals PRH1 mediates ARF7-LBD dependent auxin signaling to regulate lateral root development in Arabidopsis thaliana

PLoS Genetics ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. e1008044 ◽  
Author(s):  
Feng Zhang ◽  
Wenqing Tao ◽  
Ruiqi Sun ◽  
Junxia Wang ◽  
Cuiling Li ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Development ◽  
Lateral Root ◽  
Auxin Signaling ◽  
Lateral Root Development
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