scholarly journals Root-Gel Interactions and the Root Waving Behavior of Arabidopsis

2004 ◽  
Vol 135 (3) ◽  
pp. 1822-1837 ◽  
Author(s):  
Matthew V. Thompson ◽  
N. Michele Holbrook
Keyword(s):  
Root Waving

scholarly journals How grow-and-switch gravitropism generates root coiling and root waving growth responses in Medicago truncatula

2015 ◽  
Vol 112 (42) ◽  
pp. 12938-12943 ◽  
Author(s):  
Tzer Han Tan ◽  
Jesse L. Silverberg ◽  
Daniela S. Floss ◽  
Maria J. Harrison ◽  
Christopher L. Henley ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Growth Medium ◽  
Plant Root ◽  
Experimental Studies ◽  
Optimal Strategies ◽  
Growth Responses ◽  
Inclined Plane ◽  
Rigid Barrier ◽  
Primary Roots ◽  
Root Waving

Experimental studies show that plant root morphologies can vary widely from straight gravity-aligned primary roots to fractal-like root architectures. However, the opaqueness of soil makes it difficult to observe how environmental factors modulate these patterns. Here, we combine a transparent hydrogel growth medium with a custom built 3D laser scanner to directly image the morphology of Medicago truncatula primary roots. In our experiments, root growth is obstructed by an inclined plane in the growth medium. As the tilt of this rigid barrier is varied, we find Medicago transitions between randomly directed root coiling, sinusoidal root waving, and normal gravity-aligned morphologies. Although these root phenotypes appear morphologically distinct, our analysis demonstrates the divisions are less well defined, and instead, can be viewed as a 2D biased random walk that seeks the path of steepest decent along the inclined plane. Features of this growth response are remarkably similar to the widely known run-and-tumble chemotactic behavior of Escherichia coli bacteria, where biased random walks are used as optimal strategies for nutrient uptake.

Circumnutation and gravitropism cause root waving inArabidopsis thaliana

1995 ◽  
Vol 46 (1) ◽  
pp. 143-150 ◽  
Author(s):  
Carl Simmons ◽  
Dieter Söll ◽  
Fernando Migliaccio
Keyword(s):  
Root Waving

scholarly journals Torsions-Driven Root Helical Growth, Waving And Skewing In Arabidopsis

2021 ◽  
Author(s):  
Ke Zhou
Keyword(s):  
Cell Wall ◽  
Cellulose Microfibrils ◽  
Cross Linking ◽  
Cortical Microtubules ◽  
Root Cells ◽  
Left Handedness ◽  
Helical Growth ◽  
Root Waving ◽  
Working Together ◽  
Interesting Behavior

AbstractHelical growth broadly exists in immobile plants to support their limited movement, and Arabidopsis seedling root exhibiting natural left-handedness helical growth is considered as a simplified model for investigating this interesting behavior. Efforts have been made for understanding the mechanism of root helical growth and consequent root waving and skewing on tilted and impenetrable surface, and several models have been established. Here, previous reports are reviewed and a straightforward torsions-driven mechanism has been emphasized, and additional experiments have been performed to fill up the gaps of this theory in our study.This study implies that, torsions originating from handedness of both cortical microtubules and cellulose microfibrils play central role in root handed helical growth. Different from torsions directly provided by handed assembled cortical microtubules, torsions originating from right-handed assembled cellulose microfibrils are relaxed by their cross-linking with pectin within cell wall, but only exhibited when their cross-linking is interrupted due to damaged cell wall integrity. To topologically relax these torsions, supercoils of cortical microtubules and/or cellulose microfibrils exhibiting as oblique alignments are formed in root cells, which alter the orientation of root cell files and generate handed helical roots. Working together with gravitropic response, relaxation of torsions originating from helical roots drives roots to elongate with handedness, which therefore produces waved and skewed roots on tilted and impenetrable surface.

scholarly journals Root waving and skewing - unexpectedly in micro-g

2012 ◽  
Vol 12 (1) ◽  
pp. 231 ◽  
Author(s):  
Stanley J Roux
Keyword(s):  
Root Waving

Loss of CLE40, a protein functionally equivalent to the stem cell restricting signal CLV3, enhances root waving in Arabidopsis

2003 ◽  
Vol 213 (8) ◽  
pp. 371-381 ◽  
Author(s):  
Martin Hobe ◽  
Ralf M�ller ◽  
Margit Gr�newald ◽  
Ulrike Brand ◽  
R�diger Simon
Keyword(s):  
Stem Cell ◽  
Root Waving

scholarly journals NITRIC OXIDE-ASSOCIATED PROTEIN1 (AtNOA1) is essential for salicylic acid-induced root waving inArabidopsis thaliana

2015 ◽  
Vol 207 (1) ◽  
pp. 211-224 ◽  
Author(s):  
Xiang Zhao ◽  
Jin Wang ◽  
Jing Yuan ◽  
Xi-li Wang ◽  
Qing-ping Zhao ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salicylic Acid ◽  
Root Waving

scholarly journals Loss-of-Function Mutations of ROOT HAIR DEFECTIVE3 Suppress Root Waving, Skewing, and Epidermal Cell File Rotation in Arabidopsis

2005 ◽  
Vol 138 (2) ◽  
pp. 701-714 ◽  
Author(s):  
Christen Y.L. Yuen ◽  
John C. Sedbrook ◽  
Robyn M. Perrin ◽  
Kathleen L. Carroll ◽  
Patrick H. Masson
Keyword(s):  
Epidermal Cell ◽  
Root Hair ◽  
Loss Of Function ◽  
Root Waving

scholarly journals The WAG1 and WAG2 protein kinases negatively regulate root waving in Arabidopsis

2006 ◽  
Vol 45 (5) ◽  
pp. 752-764 ◽  
Author(s):  
Aaron A. Santner ◽  
John C. Watson
Keyword(s):  
Protein Kinases ◽  
Root Waving
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