Plant steroid hormones

1983 ◽  
Vol 11 (5) ◽  
pp. 543-548 ◽  
Author(s):  
JAN M. C. GEUNS
Keyword(s):  
Steroid Hormones ◽  
Adventitious Root ◽  
Lateral Root ◽  
Rna Synthesis ◽  
Root Formation ◽  
Test System ◽  
Adventitious Root Formation ◽  
Receptor Protein ◽  
Lateral Root Formation ◽  
Structural Requirements

After a brief survey of the literature on the recently discovered brassinolide, some of our results with corticosteroids are given. A number of structural requirements of corticosteroids were deduced in a bioassay involving elongation growth and lateral root formation. To explain the activity of glucocorticoids, the involvement of a receptor protein is suggested as well as an enhanced RNA synthesis. However, the structural requirements found are not applicable to experiments on adventitious root formation, implying a different mode of action of corticosteroids in this test system.

Lateral root formation and nutrients: nitrogen in the spotlight

2021 ◽  
Author(s):  
Pierre-Mathieu Pélissier ◽  
Hans Motte ◽  
Tom Beeckman
Keyword(s):  
Signaling Pathways ◽  
Root System ◽  
Root Development ◽  
Lateral Root ◽  
Molecular Mechanisms ◽  
Root Formation ◽  
Lateral Roots ◽  
Nutrient Use Efficiency ◽  
Lateral Root Formation ◽  
Lateral Root Development

Abstract Lateral roots are important to forage for nutrients due to their ability to increase the uptake area of a root system. Hence, it comes as no surprise that lateral root formation is affected by nutrients or nutrient starvation, and as such contributes to the root system plasticity. Understanding the molecular mechanisms regulating root adaptation dynamics towards nutrient availability is useful to optimize plant nutrient use efficiency. There is at present a profound, though still evolving, knowledge on lateral root pathways. Here, we aimed to review the intersection with nutrient signaling pathways to give an update on the regulation of lateral root development by nutrients, with a particular focus on nitrogen. Remarkably, it is for most nutrients not clear how lateral root formation is controlled. Only for nitrogen, one of the most dominant nutrients in the control of lateral root formation, the crosstalk with multiple key signals determining lateral root development is clearly shown. In this update, we first present a general overview of the current knowledge of how nutrients affect lateral root formation, followed by a deeper discussion on how nitrogen signaling pathways act on different lateral root-mediating mechanisms for which multiple recent studies yield insights.

Tissue culture of Arabidopsis thaliana explants reveals a stimulatory effect of alkamides on adventitious root formation and nitric oxide accumulation

Plant Science ◽  
2008 ◽  
Vol 174 (2) ◽  
pp. 165-173 ◽  
Author(s):  
Juan Carlos Campos-Cuevas ◽  
Ramón Pelagio-Flores ◽  
Javier Raya-González ◽  
Alfonso Méndez-Bravo ◽  
Randy Ortiz-Castro ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Tissue Culture ◽  
Arabidopsis Thaliana ◽  
Adventitious Root ◽  
Root Formation ◽  
Adventitious Root Formation
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