Cell division patterns of the protoderm and root cap in the ?closed? root apical meristem ofArabidopsis thaliana

PROTOPLASMA ◽  
2001 ◽  
Vol 218 (3-4) ◽  
pp. 203-213 ◽  
Author(s):  
C. L. Wenzel ◽  
T. L. Rost
Keyword(s):  
Cell Division ◽  
Apical Meristem ◽  
Root Cap ◽  
Root Apical Meristem ◽  
Ofarabidopsis Thaliana

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.

scholarly journals A Negative Feedback Loop Controlling bHLH Complexes Is Involved in Vascular Cell Division and Differentiation in the Root Apical Meristem

2015 ◽  
Vol 25 (23) ◽  
pp. 3144-3150 ◽  
Author(s):  
Hirofumi Katayama ◽  
Kuninori Iwamoto ◽  
Yuka Kariya ◽  
Tomohiro Asakawa ◽  
Toshiyuki Kan ◽  
...  
Keyword(s):  
Cell Division ◽  
Negative Feedback ◽  
Feedback Loop ◽  
Apical Meristem ◽  
Root Apical Meristem ◽  
Negative Feedback Loop ◽  
Vascular Cell

scholarly journals Activation of embryo during rape (Brassica napus L.) seed germination II. Transversal organisation of radicle apical meristem

2014 ◽  
Vol 49 (4) ◽  
pp. 387-395 ◽  
Author(s):  
Mieczysław Kuraś
Keyword(s):  
Brassica Napus ◽  
Seed Germination ◽  
Cross Sections ◽  
Apical Meristem ◽  
Mature Embryo ◽  
Root Cap ◽  
Root Apical Meristem ◽  
Quiescent Centre ◽  
Brassica Napus L ◽  
Cell Patterns

Series of microtome cross sections of the root apical meristem were investigated in the mature embryo and young seedling of rape. The cell patterns are described in 3 layers of promeristem. Radial sectors of the root cap and protoderm, formed by common dermatocalyptrogen initials, and radial sectors of the cortex, produced by periblem initials were identified on all cross sections of the root. Between these sectors 4 segmentation boundaries of proembryo quadrants were distinguished, running across the whole root proper. The boundaries between the 4 sectors of connecting cells arising from the upper hypophysis derivative and the boundaries between the 4 sectors of the columella originating from the lower hypophysis derivative do not follow the same course and are not identical with the boundaries of the proembryo quadrants. Therefore during the whole embryogenesis, the central connecting cells, considered generally as cortex initials (iec), take no part in the development of the cortex but they form the quiescent centre of the radicle. Neither do the columella initial cells participate in the development of the lateral parts of the root cap.

scholarly journals Cytokinin Induces Cell Division in the Quiescent Center of the Arabidopsis Root Apical Meristem

2013 ◽  
Vol 23 (20) ◽  
pp. 1979-1989 ◽  
Author(s):  
Wenjing Zhang ◽  
Ranjan Swarup ◽  
Malcolm Bennett ◽  
G. Eric Schaller ◽  
Joseph J. Kieber
Keyword(s):  
Cell Division ◽  
Apical Meristem ◽  
Root Apical Meristem ◽  
Quiescent Center ◽  
Arabidopsis Root

scholarly journals Organization of the root apical meristem in Linum usitatissimum L. grown at 25°C and 7°C

2015 ◽  
Vol 40 (2) ◽  
pp. 389-394 ◽  
Author(s):  
A. Kadej ◽  
H. Stobiecka ◽  
F. Kadej
Keyword(s):  
Linum Usitatissimum ◽  
Apical Meristem ◽  
Root Cap ◽  
Periclinal Division ◽  
Root Apical Meristem ◽  
Linum Usitatissimum L ◽  
Cell Arrangement ◽  
Intensive Growth

In the first days of intensive growth of the Linum usitatissimum root, the central part of the apical meristem exhibits usually a 4-tier organization. When growth ceases reorganization of the cell arrangement occurs. It starts by periclinal division of the subprotodermal initials, whose derivatives are forming the secondary columella in the central part of the root cap.

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