scholarly journals ERECTA-family genes coordinate stem cell functions between the epidermal and internal layers of the shoot apical meristem

Development ◽  
2017 ◽  
Vol 145 (1) ◽  
pp. dev156380 ◽  
Author(s):  
Yuka Kimura ◽  
Masao Tasaka ◽  
Keiko U. Torii ◽  
Naoyuki Uchida
Keyword(s):  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Internal Layers ◽  
Cell Functions

scholarly journals Dose-Dependent AGO1-Mediated Inhibition of the miRNA165/166 Pathway Modulates Stem Cell Maintenance in Arabidopsis Shoot Apical Meristem

2020 ◽  
Vol 1 (1) ◽  
pp. 100002
Author(s):  
Fei Du ◽  
Wen Gong ◽  
Sonia Boscá ◽  
Matthew Tucker ◽  
Hervé Vaucheret ◽  
...  
Keyword(s):  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Stem Cell Maintenance ◽  
Dose Dependent ◽  
Cell Maintenance

scholarly journals Model of structuring the stem cell niche in shoot apical meristem of Arabidopsis thaliana

2013 ◽  
Vol 452 (1) ◽  
pp. 316-319 ◽  
Author(s):  
S. V. Nikolaev ◽  
U. S. Zubairova ◽  
A. V. Penenko ◽  
E. D. Mjolsness ◽  
B. E. Shapiro ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Stem Cell Niche ◽  
Apical Meristem ◽  
Cell Niche

Flower meristem maintenance by TILLERS ABSENT 1 is essential for ovule development in rice

Development ◽  
2021 ◽  
Vol 148 (24) ◽  
Author(s):  
Wakana Tanaka ◽  
Suzuha Ohmori ◽  
Naoto Kawakami ◽  
Hiro-Yuki Hirano
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Flower Development ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Stem Cell Marker ◽  
Ovule Development ◽  
Flower Meristem ◽  
Ovule Formation ◽  
Meristem Maintenance

ABSTRACT Plant development depends on the activity of pluripotent stem cells in meristems, such as the shoot apical meristem and the flower meristem. In Arabidopsis thaliana, WUSCHEL (WUS) is essential for stem cell homeostasis in meristems and integument differentiation in ovule development. In rice (Oryza sativa), the WUS ortholog TILLERS ABSENT 1 (TAB1) promotes stem cell fate in axillary meristem development, but its function is unrelated to shoot apical meristem maintenance in vegetative development. In this study, we examined the role of TAB1 in flower development. The ovule, which originates directly from the flower meristem, failed to differentiate in tab1 mutants, suggesting that TAB1 is required for ovule formation. Expression of a stem cell marker was completely absent in the flower meristem at the ovule initiation stage, indicating that TAB1 is essential for stem cell maintenance in the ‘final’ flower meristem. The ovule defect in tab1 was partially rescued by floral organ number 2 mutation, which causes overproliferation of stem cells. Collectively, it is likely that TAB1 promotes ovule formation by maintaining stem cells at a later stage of flower development.

scholarly journals Ready, aim, shoot: stem cell regulation of the shoot apical meristem

2016 ◽  
Vol 29 ◽  
pp. 163-168 ◽  
Author(s):  
Cara L Soyars ◽  
Sean R James ◽  
Zachary L Nimchuk
Keyword(s):  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Cell Regulation ◽  
Stem Cell Regulation

scholarly journals ERECTA family signaling constrains CLAVATA3 and WUSCHEL to the center of the shoot apical meristem

2020 ◽  
Author(s):  
Liang Zhang ◽  
Daniel DeGennaro ◽  
Guangzhong Lin ◽  
Jijie Chai ◽  
Elena D. Shpak
Keyword(s):  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Feedback Loop ◽  
Apical Meristem ◽  
Rapid Decrease ◽  
Plant Organs ◽  
Correct Function ◽  
Summary Statement ◽  
Cell Positioning ◽  
Radial Axis

AbstractThe shoot apical meristem (SAM) is a reservoir of stem cells that gives rise to all post-embryonic aboveground plant organs. The size of the SAM remains stable over time due to a precise balance of stem cell replenishment versus cell incorporation into organ primordia. The WUSCHEL (WUS)/CLAVATA (CLV) negative feedback loop is central to SAM size regulation. Its correct function depends on accurate spatial expression of WUS and CLV3. A signaling pathway, consisting of ERECTA family (ERf) receptors and EPIDERMAL PATTERNING FACTOR LIKE (EPFL) ligands, restricts SAM width and promotes leaf initiation. While ERf receptors are expressed throughout the SAM, EPFL ligands are expressed in its periphery. Our genetic analysis demonstrated that ERfs and CLV3 synergistically regulate the size of the SAM, and wus is epistatic to erfs. Furthermore, activation of ERf signaling with exogenous EPFLs resulted in a rapid decrease of CLV3 and WUS expression. ERf-EPFL signaling inhibits expression of WUS and CLV3 in the periphery of the SAM, confining them to the center. These findings establish the molecular mechanism for stem cell positioning along the radial axis.Summary statementERf signaling restricts the width of the shoot apical meristem, a structure which generates aboveground plant organs, by inhibiting expression of two principal regulators, CLV3 and WUS, at its periphery.

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