scholarly journals Various scenarios of the cell pattern formation in Arabidopsis lateral root

2014 ◽  
Vol 83 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Jolanta Białek ◽  
Izabela Potocka ◽  
Joanna M. Szymanowska-Pułka
Keyword(s):  
Cell Wall ◽  
Pattern Formation ◽  
Stress Distribution ◽  
Lateral Root ◽  
Morphological Features ◽  
Local Change ◽  
Cell Pattern ◽  
Cell Divisions ◽  
Early Stages ◽  
In Cells

During lateral root (LR) development a coordinate sequence of cell divisions, accompanied by a change of the organ form takes place. Both the order of anatomical events and morphological features may vary for individual primordia. At early stages of LR primordia development oblique division walls are inserted in cells that are symmetrically located on both sides of the axis of the developing LR primordium, and thereby allow for the protrusion of the LR. We hypothesize that both oblique cell wall insertion and continuous changes in primordium form could be a consequence of a local change in stress distribution in the region of the LR initiation.

Reproduction

2017 ◽  
Author(s):  
Derek Burton ◽  
Margaret Burton
Keyword(s):  
Reproductive Behaviour ◽  
Life Cycles ◽  
Freshwater Species ◽  
Adult Fish ◽  
Reproductive Patterns ◽  
Cell Divisions ◽  
Early Stages ◽  
External Cues ◽  
Neural Factors

Interspecific fish reproductive patterns, outputs and life cycles display the greatest variability within the vertebrates. Early stages of oogenesis can be repeated in adult fish, contrasting with mammals; the pre-set sequence of cell divisions in gametogenesis is otherwise similar and is described in detail. Most fish deposit much yolk (vitellogenesis) in developing eggs. Migrations, beach-spawning and mouth-brooding are some of the interesting variations. Fertilization is predominantly external but is internal in some groups such as chondrichthyans. The omission of annual reproduction is well established in some freshwater species and the idea that this may also be the case for marine teleosts is gaining acceptance. This should be taken into account for intensively fished species. The possible roles of external cues, hormones, pheromones and neural factors acting as ‘switches’ and coordinators in gametogenesis and reproductive behaviour are discussed.

MORPHOLOGICAL FEATURES OF THE TRIGEMINAL GANGLION IN ACUTE ASEPTIC INFLAMMATION AT THE EARLY STAGES OF THE EXPERIMENT

2021 ◽  
Vol 17 (76) ◽  
pp. 207
Author(s):  
О. D. Daniliv ◽  
Ye. V. Stetsuk ◽  
N. V. Boruta ◽  
G. V. Lukiantseva ◽  
V. I. Shepitko
Keyword(s):  
Trigeminal Ganglion ◽  
Morphological Features ◽  
Aseptic Inflammation ◽  
Early Stages

scholarly journals A non-canonical function for Centromere-associated protein-E (CENP-E) controls centrosome integrity and orientation of cell division

2020 ◽  
Author(s):  
Mikito Owa ◽  
Brian Dynlacht
Keyword(s):  
Cell Division ◽  
Mitotic Arrest ◽  
Canonical Function ◽  
Kinesin Motor ◽  
Cell Divisions ◽  
Pericentriolar Material ◽  
Conventional Methods ◽  
In Cells

SummaryCentromere-associated protein-E (CENP-E) is a kinesin motor localizing at kinetochores. Although its mitotic functions have been well studied, it has been challenging to investigate direct consequences of CENP-E removal using conventional methods because CENP-E depletion results in mitotic arrest. In this study, we harnessed an auxin-inducible degron system to achieve acute degradation of CENP-E. We revealed a kinetochore-independent role for CENP-E that removes pericentriolar material 1 (PCM1) from centrosomes in G2 phase. After acute loss of CENP-E, centrosomal Polo-like kinase 1 (Plk1) is sequestered by accumulated PCM1, resulting in aberrant phosphorylation and destabilization of centrosomes, which triggers loss of astral microtubules and oblique cell divisions. Furthermore, we also observed centrosome and cell division defects in cells from a microcephaly patient with mutations in CENPE. Orientation of cell division is deregulated in some microcephalic patients, and our unanticipated findings provide a unifying principle that explains how microcephaly can result from centrosomal defects.

Relationship betweenin vitrogas production and neutral detergent fibre disappearance in three tropical grasses

1996 ◽  
Vol 1996 ◽  
pp. 219-219
Author(s):  
M. Herrero ◽  
N.S. Jessop
Keyword(s):  
Cell Wall ◽  
Gas Production ◽  
Adequate Description ◽  
Tropical Grasses ◽  
Neutral Detergent Fibre ◽  
Early Stages ◽  
Production Techniques ◽  
Gas Volume

In vitrogas production techniques have been used to nutritionally characterise feedstuffs for ruminants. Consideration of both the soluble and insoluble fractions has recently been shown to be essential for adequate description of cell wall disappearance (Jessop and Herrero, 1996). This study investigates how gas production measurements can be used to predict neutral detergent fibre (NDF) disappearance by correcting for the gas volume produced in the early stages of fermentation from neutral detergent solubles (NDS). The study was carried out using three tropical grasses.

scholarly journals Cell Death in Cells Overlying Lateral Root Primordia Facilitates Organ Growth in Arabidopsis

2020 ◽  
Vol 30 (3) ◽  
pp. 455-464.e7 ◽  
Author(s):  
Sacha Escamez ◽  
Domenique André ◽  
Bernadette Sztojka ◽  
Benjamin Bollhöner ◽  
Hardy Hall ◽  
...  
Keyword(s):  
Cell Death ◽  
Lateral Root ◽  
Root Primordia ◽  
Lateral Root Primordia ◽  
Organ Growth ◽  
In Cells
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