scholarly journals Ultrastructure of cells in an initiating lateral root primordium of Raphanus sativus

2015 ◽  
Vol 41 (2) ◽  
pp. 197-204
Author(s):  
F. Kadej ◽  
B. Rodkiewicz
Keyword(s):  
Raphanus Sativus ◽  
Lateral Root ◽  
Basal Layer ◽  
Central Vacuole ◽  
Lateral Root Primordia ◽  
Cell Layers ◽  
Large Central Vacuole ◽  
Lateral Root Primordium ◽  
Pericycle Cells ◽  
Root Primordium

Lateral root primordia in <i>Raphanus sativus</i> had developed 10 hours after main root decapitation. The primordia consisted of three cell layers — basal layer continuous with the pericycle. The primordia were initiated by activated groups of pericycle cells. Inactive pericycle cells with a thin layer of parietal cytoplasme large central vacuole and well developed leucoplasts with starch grains were trans-formed into meristematic cells. During transformation the amount of cytoplasm and number of cytoplasmic organelles greatly increased, the central vacuole disappeared, and an ER system continuous in many places with the nuclear envelope evolved. The lamellar structure of plastids underwent almost complete reduction; the dictyosomes became active. The newly formed meristem differed apparently from the apical root meristem only in the lack or scarcity of lipid bodies and starch.

scholarly journals The Auxin-Regulated AP2/EREBP Gene PUCHI Is Required for Morphogenesis in the Early Lateral Root Primordium of Arabidopsis

2007 ◽  
Vol 19 (7) ◽  
pp. 2156-2168 ◽  
Author(s):  
Atsuko Hirota ◽  
Takehide Kato ◽  
Hidehiro Fukaki ◽  
Mitsuhiro Aida ◽  
Masao Tasaka
Keyword(s):  
Lateral Root ◽  
Lateral Root Primordium ◽  
Root Primordium

Formation of lateral root meristems is a two-stage process

Development ◽  
1995 ◽  
Vol 121 (10) ◽  
pp. 3303-3310 ◽  
Author(s):  
M.J. Laskowski ◽  
M.E. Williams ◽  
H.C. Nusbaum ◽  
I.M. Sussex
Keyword(s):  
Lateral Root ◽  
Lateral Roots ◽  
Initial Period ◽  
Subsequent Stage ◽  
Root Initiation ◽  
Root Meristems ◽  
Lateral Root Initiation ◽  
Cell Layers ◽  
Stage Process ◽  
Pericycle Cells

In both radish and Arabidopsis, lateral root initiation involves a series of rapid divisions in pericycle cells located on the xylem radius of the root. In Arabidopsis, the number of pericycle cells that divide to form a primordium was estimated to be about 11. To determine the stage at which primordia are able to function as root meristems, primordia of different stages were excised and cultured without added hormones. Under these conditions, primordia that consist of 2 cell layers fail to develop while primordia that consist of at least 3–5 cell layers develop as lateral roots. We hypothesize that meristem formation is a two-step process involving an initial period during which a population of rapidly dividing, approximately isodiametric cells that constitutes the primordium is formed, and a subsequent stage during which meristem organization takes place within the primordium.

scholarly journals Control of Arabidopsis lateral root primordium boundaries by MYB36

2016 ◽  
Vol 213 (1) ◽  
pp. 105-112 ◽  
Author(s):  
María Fernández-Marcos ◽  
Bénédicte Desvoyes ◽  
Concepción Manzano ◽  
Louisa M. Liberman ◽  
Philip N. Benfey ◽  
...  
Keyword(s):  
Lateral Root ◽  
Lateral Root Primordium ◽  
Root Primordium

Lateral root initiation in Marsilea quadrifolia. I. Origin and histogenesis of lateral roots

1991 ◽  
Vol 69 (1) ◽  
pp. 123-135 ◽  
Author(s):  
Bai-Ling Lin ◽  
V. Raghavan
Keyword(s):  
Lateral Root ◽  
Single Cells ◽  
Lateral Roots ◽  
Central Axis ◽  
Root Initiation ◽  
Vascular Connection ◽  
Lateral Root Initiation ◽  
Marsilea Quadrifolia ◽  
Lateral Root Primordium ◽  
Root Primordium

In Marsilea quadrifolia, lateral roots arise from modified single cells of the endodermis located opposite the protoxylem poles within the meristematic region of the parent root. The initial cell divides in four specific planes to establish a fivecelled lateral root primordium, with a tetrahedral apical cell in the centre and the oldest merophytes and the root cap along the sides. The cells of the merophyte divide in a precise pattern to give rise to the cells of the cortex, endodermis, pericycle, and vascular tissues of the emerging lateral root. Although the construction of the parent root is more complicated than that of lateral roots, patterns of cell division and tissue formation are similar in both types of roots, with the various tissues being arranged in similar positions in relation to the central axis. Vascular connection between the lateral root primordium and the parent root is derived from the pericycle cells lying between the former and the protoxylem members of the latter. It is proposed that the central axis of the root is not only a geometric centre, but also a physiological centre which determines the fate of the different cell types. Key words: lateral root initiation, Marsilea quadrifolia, root histogenesis.

scholarly journals Editorial: Root Branching: From Lateral Root Primordium Initiation and Morphogenesis to Function

2019 ◽  
Vol 10 ◽  
Author(s):  
Joseph G. Dubrovsky ◽  
Hidehiro Fukaki ◽  
Laurent Laplaze ◽  
Marta Laskowski
Keyword(s):  
Lateral Root ◽  
Root Branching ◽  
Lateral Root Primordium ◽  
Root Primordium

scholarly journals Histological characterization of the lateral root primordium development in rice

2014 ◽  
Vol 55 (1) ◽  
Author(s):  
Jun Ni ◽  
Yan-Xia Shen ◽  
Yan-Yan Zhang ◽  
Yu Liu
Keyword(s):  
Lateral Root ◽  
Lateral Root Primordium ◽  
Root Primordium

scholarly journals Unique features of the grapevine VvK5.1 channel support novel functions for outward K+ channels in plants

2019 ◽  
Vol 70 (21) ◽  
pp. 6181-6193 ◽  
Author(s):  
Jérémy Villette ◽  
Teresa Cuéllar ◽  
Sabine D Zimmermann ◽  
Jean-Luc Verdeil ◽  
Isabelle Gaillard
Keyword(s):  
Lateral Root ◽  
K Channels ◽  
Lateral Root Primordium ◽  
Root Primordium ◽  
Channel Type

The unexpected location of VvK5.1 expression detected in the lateral root primordium, berry phloem and pistil provides new insights into the roles that this outward channel type can play in plants.

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