Studies on the behavior of organelles and their nucleoids in the root apical meristem of Arabidopsis thaliana (L.) Col.

Planta ◽  
1993 ◽  
Vol 189 (3) ◽  
pp. 443-452 ◽  
Author(s):  
Makoto Fujie ◽  
Haruko Kuroiwa ◽  
Shigeyuki Kawano ◽  
Tsuneyoshi Kuroiwa
Keyword(s):  
Arabidopsis Thaliana ◽  
Apical Meristem ◽  
Root Apical Meristem

scholarly journals Sound Waves Promote Arabidopsis thaliana Root Growth by Regulating Root Phytohormone Content

2021 ◽  
Vol 22 (11) ◽  
pp. 5739
Author(s):  
Joo Yeol Kim ◽  
Hyo-Jun Lee ◽  
Jin A Kim ◽  
Mi-Jeong Jeong
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Division ◽  
Root Growth ◽  
Apical Meristem ◽  
Cell Number ◽  
Root Apical Meristem ◽  
Control Group ◽  
Auxin Signaling ◽  
Ethylene Signaling ◽  
Sound Waves

Sound waves affect plants at the biochemical, physical, and genetic levels. However, the mechanisms by which plants respond to sound waves are largely unknown. Therefore, the aim of this study was to examine the effect of sound waves on Arabidopsis thaliana growth. The results of the study showed that Arabidopsis seeds exposed to sound waves (100 and 100 + 9k Hz) for 15 h per day for 3 day had significantly longer root growth than that in the control group. The root length and cell number in the root apical meristem were significantly affected by sound waves. Furthermore, genes involved in cell division were upregulated in seedlings exposed to sound waves. Root development was affected by the concentration and activity of some phytohormones, including cytokinin and auxin. Analysis of the expression levels of genes regulating cytokinin and auxin biosynthesis and signaling showed that cytokinin and ethylene signaling genes were downregulated, while auxin signaling and biosynthesis genes were upregulated in Arabidopsis exposed to sound waves. Additionally, the cytokinin and auxin concentrations of the roots of Arabidopsis plants increased and decreased, respectively, after exposure to sound waves. Our findings suggest that sound waves are potential agricultural tools for improving crop growth performance.

Stem cell ageing of the root apical meristem of Arabidopsis thaliana

2020 ◽  
Vol 190 ◽  
pp. 111313
Author(s):  
Annika Wein ◽  
Anne-Laure Le Gac ◽  
Thomas Laux
Keyword(s):  
Arabidopsis Thaliana ◽  
Stem Cell ◽  
Apical Meristem ◽  
Root Apical Meristem

scholarly journals Characterizing Microtubule Organization in the Arabidopsis Thaliana Root Apical Meristem via Correlative Microscopy

2015 ◽  
Vol 21 (S3) ◽  
pp. 875-876
Author(s):  
Katherine Celler ◽  
Chris Ambrose ◽  
Yuan Ruan ◽  
Bradford Ross ◽  
Geoffrey Wasteneys
Keyword(s):  
Arabidopsis Thaliana ◽  
Apical Meristem ◽  
Root Apical Meristem ◽  
Correlative Microscopy ◽  
Microtubule Organization

scholarly journals Coumarin Interferes with Polar Auxin Transport Altering Microtubule Cortical Array Organization in Arabidopsis thaliana (L.) Heynh. Root Apical Meristem

2021 ◽  
Vol 22 (14) ◽  
pp. 7305
Author(s):  
Leonardo Bruno ◽  
Emanuela Talarico ◽  
Luz Cabeiras-Freijanes ◽  
Maria Letizia Madeo ◽  
Antonella Muto ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Lateral Root ◽  
Apical Meristem ◽  
Root Formation ◽  
Auxin Transport ◽  
Primary Root ◽  
Polar Auxin Transport ◽  
Root Apical Meristem ◽  
Lateral Root Formation ◽  
Cortical Array

Coumarin is a phytotoxic natural compound able to affect plant growth and development. Previous studies have demonstrated that this molecule at low concentrations (100 µM) can reduce primary root growth and stimulate lateral root formation, suggesting an auxin-like activity. In the present study, we evaluated coumarin’s effects (used at lateral root-stimulating concentrations) on the root apical meristem and polar auxin transport to identify its potential mode of action through a confocal microscopy approach. To achieve this goal, we used several Arabidopsis thaliana GFP transgenic lines (for polar auxin transport evaluation), immunolabeling techniques (for imaging cortical microtubules), and GC-MS analysis (for auxin quantification). The results highlighted that coumarin induced cyclin B accumulation, which altered the microtubule cortical array organization and, consequently, the root apical meristem architecture. Such alterations reduced the basipetal transport of auxin to the apical root apical meristem, inducing its accumulation in the maturation zone and stimulating lateral root formation.

Critical level of radiation damage of root apical meristem and mechanisms for its recovery in Pisum sativum L.

2011 ◽  
Vol 45 (1) ◽  
pp. 18-26 ◽  
Author(s):  
E. A. Kravets ◽  
A. N. Mikheev ◽  
L. G. Ovsyannikova ◽  
D. M. Grodzinsky
Keyword(s):  
Pisum Sativum ◽  
Radiation Damage ◽  
Apical Meristem ◽  
Critical Level ◽  
Root Apical Meristem ◽  
Pisum Sativum L
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