scholarly journals The origins of the quiescent centre concept

2015 ◽  
Vol 206 (2) ◽  
pp. 493-496 ◽  
Author(s):  
Joseph G. Dubrovsky ◽  
Peter W. Barlow
Keyword(s):  
Quiescent Centre

The role of the quiescent centre in the recovery of Vicia faba roots from radiation

1962 ◽  
Vol 2 (3-4) ◽  
pp. 189-194 ◽  
Author(s):  
E.J. Hall ◽  
L.G. Lajtha ◽  
F.A.L. Clowes
Keyword(s):  
Vicia Faba ◽  
Quiescent Centre

Primary vascular patterns in root meristems of Pontederia cordata and their relevance to studies of root development

1980 ◽  
Vol 58 (12) ◽  
pp. 1351-1369 ◽  
Author(s):  
W. A. Charlton
Keyword(s):  
Apical Meristem ◽  
Vascular System ◽  
Root Apex ◽  
Root Apical Meristem ◽  
Vascular Pattern ◽  
Quiescent Centre ◽  
Vascular Differentiation ◽  
Pontederia Cordata ◽  
Distribution Of Components ◽  
Root Apices

There are several files of metaxylem cells in root apices of Pontederia cordata L., each considered to consist of a series of prospective vessels with their ends in contact. Two longitudinally adjacent vessels may be in the same file of cells produced by the root apex or in adjacent files. As the root grows, successive prospective vessels are added to the apical ends of most of the files but not all files are continued. Addition of prospective vessels appears to take place within the "quiescent centre" of the root apical meristem. Where files are not continued there is no immediate readjustment of remaining files. The longitudinal and transverse distribution of components of the vascular system (including protophloem and protoxylem) is discussed in relation to the means by which the pattern of development may be controlled. Rates of production of vessels and the final lengths of the vessels are estimated. The observations and deductions are discussed in relation to other studies of root growth, vascular differentiation, and vascular pattern formation and maintenance.

Experimental control of the activity of the quiescent centre in excised root tips of Zea mays

Planta ◽  
1973 ◽  
Vol 112 (2) ◽  
pp. 91-100 ◽  
Author(s):  
Peter L. Webster ◽  
Haviva D. Langenauer
Keyword(s):  
Zea Mays ◽  
Quiescent Centre ◽  
Root Tips ◽  
Experimental Control

An analysis of the mitotic cell cycle in the root meristem of Zea mays

1973 ◽  
Vol 183 (1073) ◽  
pp. 385-398 ◽  
Keyword(s):  
Cell Cycle ◽  
Zea Mays ◽  
Root Meristem ◽  
Mitotic Cell ◽  
Mitotic Cell Cycle ◽  
Pulse Labelling ◽  
Quiescent Centre ◽  
Proliferating Cells ◽  
Average Delay ◽  
The Mean

A pulse labelling experiment was used to study the mitotic cell cycle of proliferating cells throughout the root meristem of Zea mays . Seventeen different regions were identified within the area of proliferative activity, extending from the initial cells of the cap columella up to the stele, cortex and epidermis 1000 μm from the cap-quiescent centre junction, and the data were analysed for each region separately. The analyses were made in terms of a mathematical model for cell proliferation and yield statistically efficient estimates of the cell-cycle parameters. The validity of the model is discussed in some detail. It appears that the main difference between the regions studied is in the mean duration of G 1 , that is, the average delay a newborn cell experiences before it begins to synthesize DNA. The mean durations of S and G 2 , the DNA-synthetic and post-DNA-synthetic phases of the mitotic cycle, are relatively constant. The one exception to this pattern is the quiescent centre; this region includes a relatively high proportion of slowly dividing and non-proliferating cells.

Nutrition and the quiescent centre of root meristems

Planta ◽  
1970 ◽  
Vol 90 (4) ◽  
pp. 340-348 ◽  
Author(s):  
F. A. L. Clowes
Keyword(s):  
Quiescent Centre ◽  
Root Meristems

scholarly journals The quiescent centre and root apical meristem: organization and function

2021 ◽  
Author(s):  
Joseph G Dubrovsky ◽  
Kris Vissenberg
Keyword(s):  
Root Growth ◽  
Apical Meristem ◽  
100Th Anniversary ◽  
Root Apical Meristem ◽  
Quiescent Centre ◽  
Special Issue ◽  
Future Directions ◽  
Cell Production ◽  
And Function

Abstract This special issue is dedicated to the 100th anniversary of the birth of Frederick Albert Lionel Clowes, who discovered the quiescent centre (QC) of the root apical meristem (RAM). His discovery was a foundation for contemporary studies of the QC and RAM function, maintenance, and organization. RAM function is fundamental for cell production and root growth. This special issue bundles reviews on the main tendencies, hypotheses, and future directions, and identifies unknowns in the field.

Organelle DNA Synthesis in the Quiescent centre ofArabidopsis thaliana(Col.)

1993 ◽  
Vol 44 (4) ◽  
pp. 689-693 ◽  
Author(s):  
MAKOTO FUJIE ◽  
HARUKO KUROIWA ◽  
TAKESHI SUZUKI ◽  
SHIGEYUKI KAWANO ◽  
TSUNEYOSHI KUROIWA
Keyword(s):  
Dna Synthesis ◽  
Quiescent Centre ◽  
Organelle Dna ◽  
Ofarabidopsis Thaliana
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