Signaling-Dependent Cytoskeletal Dynamics and Plant Cell Growth

2016 ◽  
pp. 139-155
Author(s):  
Stefano Del Duca ◽  
Giampiero Cai
Keyword(s):  
Cell Growth ◽  
Plant Cell ◽  
Cytoskeletal Dynamics ◽  
Plant Cell Growth

The microtubule-associated protein WDL4 modulates auxin distribution to promote apical hook opening in Arabidopsis

2021 ◽  
Author(s):  
Jia Deng ◽  
Xiangfeng Wang ◽  
Ziqiang Liu ◽  
Tonglin Mao
Keyword(s):  
Cell Growth ◽  
Plant Cell ◽  
Positive Role ◽  
Apical Hook ◽  
Auxin Distribution ◽  
Differential Cell ◽  
Dicotyledonous Plants ◽  
Underlying Mechanisms ◽  
Temporal Expression Pattern ◽  
Plant Cell Growth

AbstractThe unique apical hook in dicotyledonous plants protects the shoot apical meristem and cotyledons when seedlings emerge through the soil. Its formation involves differential cell growth under the coordinated control of plant hormones, especially ethylene and auxin. Microtubules are essential players in plant cell growth that are regulated by multiple microtubule-associated proteins (MAPs). However, the role and underlying mechanisms of MAP-microtubule modules in differential cell growth are poorly understood. In this study, we found that the previously uncharacterized Arabidopsis MAP WAVE-DAMPENED2-LIKE4 (WDL4) protein plays a positive role in apical hook opening. WDL4 exhibits a temporal expression pattern during hook development in dark-grown seedlings that is directly regulated by ethylene signaling. WDL4 mutants showed a delayed hook opening phenotype while overexpression of WDL4 resulted in enhanced hook opening. In particular, wdl4-1 mutants exhibited stronger auxin accumulation in the concave side of the apical hook. Furthermore, the regulation of the auxin maxima and trafficking of the auxin efflux carriers PIN-FORMED1 (PIN1) and PIN7 in the hook region is critical for WDL4-mediated hook opening. Together, our study demonstrates that WDL4 positively regulates apical hook opening by modulating auxin distribution, thus unraveling a mechanism for MAP-mediated differential plant cell growth.

Reactive oxygen species produced by NADPH oxidase regulate plant cell growth

Nature ◽  
2003 ◽  
Vol 422 (6930) ◽  
pp. 442-446 ◽  
Author(s):  
Julia Foreman ◽  
Vadim Demidchik ◽  
John H. F. Bothwell ◽  
Panagiota Mylona ◽  
Henk Miedema ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Growth ◽  
Nadph Oxidase ◽  
Plant Cell ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Plant Cell Growth

scholarly journals Erratum to: Plant cell growth and differentiation may involve GAP regulation of Rac activity (FEBS 22204)

FEBS Letters ◽  
1999 ◽  
Vol 458 (1) ◽  
pp. 82-82
Author(s):  
Søren Borg ◽  
Lone Pødenphant ◽  
Trine Juul Jensen ◽  
Carsten Poulsen
Keyword(s):  
Cell Growth ◽  
Plant Cell ◽  
Cell Growth And Differentiation ◽  
Plant Cell Growth

scholarly journals Finding a Niche

2010 ◽  
Vol 21 (22) ◽  
pp. 3762-3763
Author(s):  
Magdalena Bezanilla
Keyword(s):  
Cell Growth ◽  
Plant Cell ◽  
Cell Biology ◽  
Molecular Mechanisms ◽  
Career Trajectory ◽  
Cell Biologist ◽  
New Directions ◽  
Biology I ◽  
A Cell ◽  
Plant Cell Growth

Although I always knew I wanted to be a scientist, I didn't know I would become a cell biologist. Events in life that you would never have predicted can greatly impact your career trajectory. I have learned to let those events take me in new directions. Following a desire to investigate an understudied area of cell biology, I have found a niche. In this area, my lab is poised to contribute significantly toward understanding the fundamental molecular mechanisms underlying polarized plant cell growth.

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