scholarly journals Saturated humidity accelerates lateral root development in rice (Oryza sativa L.) seedlings by increasing phloem-based auxin transport

2007 ◽  
Vol 58 (7) ◽  
pp. 1695-1704 ◽  
Author(s):  
Tory Chhun ◽  
Yuichi Uno ◽  
Shin Taketa ◽  
Tetsushi Azuma ◽  
Masahiko Ichii ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Root Development ◽  
Lateral Root ◽  
Auxin Transport ◽  
Oryza Sativa L ◽  
Lateral Root Development

Lateral root development of two Arabidopsis auxin transport mutants, aux1-7 and eir1-1, in response to nitrate supplies

Plant Science ◽  
2007 ◽  
Vol 173 (4) ◽  
pp. 417-425 ◽  
Author(s):  
Juan Bao ◽  
Fanjun Chen ◽  
Riliang Gu ◽  
Guoying Wang ◽  
Fusuo Zhang ◽  
...  
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Auxin Transport ◽  
Lateral Root Development ◽  
Transport Mutants

scholarly journals B1L regulates lateral root development by exocytic vesicular trafficking-mediated polar auxin transport

2021 ◽  
Author(s):  
Yang Gang ◽  
Chen Bi-xia ◽  
Chen Tao ◽  
Chen Jia-hui ◽  
Sun Rui ◽  
...  
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Auxin Transport ◽  
Polar Auxin Transport ◽  
Vesicular Trafficking ◽  
Root Initiation ◽  
Root Primordia ◽  
Lateral Root Primordia ◽  
Lateral Root Development ◽  
Lateral Root Initiation

Auxin and auxin-mediated signaling pathways involved in the regulation of lateral root development are well documented. Although exocytic vesicle trafficking plays an important role in PIN-auxin-efflux carrier recycling, and polar auxin transport during lateral root formation, however, the mechanistic details of these processes are not well understood. Here, we demonstrate an essential regulatory mechanism of B1L that interacts with the exocyst to regulate PIN-mediated polar auxin transport and lateral root initiation. B1L is highly expressed in Arabidopsis roots, and genetic and cellular analyses have revealed that B1L is mainly involved in lateral root primordia initiation. Furthermore, DR5::GUS expression analyses revealed that auxin levels were higher in lateral root primordia of the b1l mutant than in the wild-type. Exogenous auxin treatment confirmed that the lateral root phenotype correlated closely with auxin levels. Additionally, auxin transport-inhibitory treatment indicated that B1L regulates auxin efflux. Consistently, b1l mutants exhibited higher levels of auxin efflux carriers PIN1-GFP and PIN3-GFP in lateral root primordia. Moreover, B1L interacts with the exocyst and functions in recycling PIN2-GFP. Finally, the b1l-1/exo70b1-1 double-mutant exhibited a significant increase in the number of lateral roots compared to the wildtype, b1l-1, and exo70b1-1. Collectively, this study improves our understanding of the highly sophisticated processes involved in exocytic vesicular trafficking-mediated polar auxin transport and lateral root initiation in plants.

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.

Isolation and characterization of a short lateral root mutant in rice (Oryza sativa L.)

Plant Science ◽  
2003 ◽  
Vol 165 (4) ◽  
pp. 895-903 ◽  
Author(s):  
Bakul Rani Debi ◽  
Junko Mushika ◽  
Shin Taketa ◽  
Akio Miyao ◽  
Hirohiko Hirochika ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Lateral Root ◽  
Oryza Sativa L ◽  
Isolation And Characterization
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