scholarly journals Culturally shared and unique meanings and expressions of maternal control across four cultures.

2020 ◽  
Author(s):  
Hyun Su Cho ◽  
Charissa S. L. Cheah ◽  
Kathy T. T. Vu ◽  
Bilge Selçuk ◽  
H. Melis Yavuz ◽  
...  
Keyword(s):  
Maternal Control

scholarly journals Maternal Control of PIN1 Is Required for Female Gametophyte Development in Arabidopsis

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e66148 ◽  
Author(s):  
Luca Ceccato ◽  
Simona Masiero ◽  
Dola Sinha Roy ◽  
Stefano Bencivenga ◽  
Irma Roig-Villanova ◽  
...  
Keyword(s):  
Female Gametophyte ◽  
Maternal Control ◽  
Gametophyte Development ◽  
Female Gametophyte Development

scholarly journals Homology-Dependent Maternal Inhibition of Developmental Excision of Internal Eliminated Sequences inParamecium tetraurelia

1998 ◽  
Vol 18 (12) ◽  
pp. 7075-7085 ◽  
Author(s):  
Sandra Duharcourt ◽  
Anne-Marie Keller ◽  
Eric Meyer
Keyword(s):  
Inhibition Efficiency ◽  
Germ Line ◽  
Single Copy ◽  
Sequence Specificity ◽  
Direct Repeats ◽  
Maternal Control ◽  
Sequence Element ◽  
Conserved Sequence ◽  
Internal Eliminated Sequences ◽  
Sexual Generation

ABSTRACT Thousands of single-copy internal eliminated sequences (IESs) are excised from the germ line genome of ciliates during development of the polygenomic somatic macronucleus, following sexual events.Paramecium IESs are short, noncoding elements that frequently interrupt coding sequences. No absolutely conserved sequence element, other than flanking 5′-TA-3′ direct repeats, has been identified among sequenced IESs; the mechanisms of their specific recognition and precise elimination are unknown. Previous work has revealed the existence of an epigenetic control of excision. It was shown that the presence of one IES in the vegetative macronucleus results in a specific inhibition of the excision of the same element during the development of a new macronucleus, in the following sexual generation. We have assessed the generality and sequence specificity of this transnuclear maternal control by studying the effects of macronuclear transformation with 13 different IESs. We show that at least five of them can be maintained in the new macronuclear genome; sequence specificity is complete both between genes and between different IESs in the same gene. In all cases, the degree of excision inhibition correlates with the copy number of the maternal IES, but each IES shows a characteristic inhibition efficiency. Short internal IES-like segments were found to be excised from two of the IESs when excision between normal boundaries was inhibited. Available data suggest that the sequence specificity of these maternal effects is mediated by pairing interactions between homologous nucleic acids.

Maternal control of a zygotic patterning gene in Caenorhabditis elegans

Development ◽  
1997 ◽  
Vol 124 (19) ◽  
pp. 3865-3869 ◽  
Author(s):  
J. Ahringer
Keyword(s):  
Gene Expression ◽  
Gene Control ◽  
Maternal Control ◽  
C Elegans ◽  
Cell Position ◽  
Maternal Effect Genes ◽  
Zygotic Gene ◽  
Patterning Genes ◽  
Necessary And Sufficient ◽  
Maternal Gene

The transition from maternal to zygotic gene control is a key process in embryogenesis. Although many maternal effect genes have been studied in the C. elegans embryo, how their activities lead to the positional expression of zygotic patterning genes has not yet been established. Evidence is presented showing that expression of the zygotic patterning gene vab-7 does not depend on cell position or cell contacts, but rather on the production of a C blastomere. Furthermore, pal-1, a caudal homologue with maternal product necessary for the proper development of the C blastomere, is both necessary and sufficient for vab-7 expression. This provides a link between maternal gene activity and zygotic patterning gene expression in C. elegans. The results suggest that zygotic patterning genes might be generally controlled at the level of blastomere fate and not by position.

Unequal cleavage in leech embryos: zygotic transcription is required for correct spindle orientation in subset of early blastomeres

Development ◽  
1996 ◽  
Vol 122 (2) ◽  
pp. 599-606
Author(s):  
S.T. Bissen ◽  
C.M. Smith
Keyword(s):  
Cell Division ◽  
Early Period ◽  
Spindle Orientation ◽  
Mitotic Spindles ◽  
Maternal Control ◽  
Transcription Analysis ◽  
Cell Divisions ◽  
Zygotic Transcription ◽  
Different Types ◽  
Alpha Amanitin

Leech embryos undergo invariant sequences of equal and unequal cell divisions to give rise to identifiable progeny cells. While many of the early cleavages are under maternal control, the divisions of a subset of early blastomeres (the large cells of the D' lineage) are perturbed after the inhibition of zygotic transcription. Analysis of the different types of cells produced in embryos injected with the transcriptional inhibitor, alpha-amanitin, revealed that the symmetry of cell division is perturbed in these large D'-derived cells during this early period of development. These cells, which would normally undergo a series of equal and unequal cleavages, always undergo equal cleavages after the inhibition of zygotic transcription. It appears that zygotically transcribed gene product(s) are required in the large cells of the D' lineage to orient the mitotic spindles properly for these unequal cell cleavages.

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