Variegation in Selaginella martensii f. albovariegata. I. Expression and inheritance

1982 ◽  
Vol 60 (11) ◽  
pp. 2375-2383 ◽  
Author(s):  
James A. Tanno ◽  
Terry R. Webster
Keyword(s):  
Cell Division ◽  
Chloroplast Dna ◽  
Maternal Inheritance ◽  
Leaf Growth ◽  
Green Growth ◽  
Wild Type ◽  
Reciprocal Crosses ◽  
Leaf Variegation ◽  
White Tissue ◽  
Stable Leaf

Selaginella martensii f. albovariegata is a variegated sport which produces distinctly white tissue in an irregular fashion. Typical specimens possess not only variegated branches but some branches exhibiting uniformly green growth and others showing completely white growth. Variegated and green branches often change in character as they grow, while white branches are stable. Leaf variegation patterns are highly variable and strongly influenced by the cell division patterns of early leaf growth. Reciprocal crosses between wild-type S. martensii and f. albovariegata show maternal inheritance of variegation, suggesting cytoplasmic control. Further crosses, involving progeny of selected reciprocal crosses, also indicate a lack of direct nuclear influence on variegation. The details of character expression and inheritance can be accounted for on the basis of a random sorting of normal and defective cytoplasmic factors at cell division. Recent characterizations of chloroplast DNA for several species of green plants suggest that the DNA molecules within the plastid may represent the sorting factor.

scholarly journals Cytokinin promotes jasmonic acid accumulation in the control of maize leaf growth

2019 ◽  
Author(s):  
Aimee N. Uyehara ◽  
Angel R. Del Valle-Echevarria ◽  
Charles T. Hunter ◽  
Hilde Nelissen ◽  
Kirin Demuynck ◽  
...  
Keyword(s):  
Growth Rate ◽  
Cell Division ◽  
Jasmonic Acid ◽  
Leaf Growth ◽  
Leaf Size ◽  
Wild Type ◽  
Cytokinin Signaling ◽  
Transcript Accumulation ◽  
Maize Leaf ◽  
Pathway Gene

AbstractGrowth of plant organs results from the combined activity of cell division and cell expansion. The coordination of these two processes depends on the interplay between multiple hormones that determine final organ size. Using the semidominant Hairy Sheath Frayed1 (Hsf1) maize mutant, that hypersignals the perception of cytokinin (CK), we show that CK can reduce leaf size and growth rate by decreasing cell division. Linked to CK hypersignaling, the Hsf1 mutant has increased jasmonic acid (JA) content, a hormone that can inhibit cell division. Treatment of wild type seedlings with exogenous JA reduces maize leaf size and growth rate, while JA deficient maize mutants have increased leaf size and growth rate. Expression analysis revealed increased transcript accumulation of several JA pathway genes in the Hsf1 leaf growth zone. A transient treatment of growing wild type maize shoots with exogenous CK also induced JA pathway gene expression, although this effect was blocked by co-treatment with cycloheximide. Together our results suggest that CK can promote JA accumulation possibly through increased expression of specific JA pathway genes.One sentence summaryCytokinin-signaling upregulates the jasmonate biosynthesis pathway, resulting in jasmonate accumulation and influences on maize leaf growth.

scholarly journals Methylation of chloroplast DNA does not affect viability and maternal inheritance in tobacco and may provide a strategy towards transgene containment

2008 ◽  
Vol 27 (8) ◽  
pp. 1377-1384 ◽  
Author(s):  
Benjamin Jaffé ◽  
Katalin Kovács ◽  
Calin Andras ◽  
Zsuzsanna Bódi ◽  
Zheng Liu ◽  
...  
Keyword(s):  
Chloroplast Dna ◽  
Maternal Inheritance ◽  
Transgene Containment

Paternal inheritance of chloroplast DNA and maternal inheritance of mitochondrial DNA in loblolly pine

1989 ◽  
Vol 77 (2) ◽  
pp. 212-216 ◽  
Author(s):  
D. B. Neale ◽  
R. R. Sederoff
Keyword(s):  
Mitochondrial Dna ◽  
Chloroplast Dna ◽  
Loblolly Pine ◽  
Maternal Inheritance ◽  
Paternal Inheritance

scholarly journals STUDIES ON THE CREEPER FOWL. XV. MATERNAL INHERITANCE IN SURVIVAL OF EMBRYOS FROM RECIPROCAL CROSSES INVOLVING THE CREEPER FACTOR

Genetics ◽  
1943 ◽  
Vol 28 (3) ◽  
pp. 218-226
Author(s):  
Walter Landauer ◽  
C I Bliss
Keyword(s):  
Maternal Inheritance ◽  
Reciprocal Crosses

scholarly journals Expression of the wild-type p53 antioncogene induces guanine nucleotide-dependent stem cell division kinetics.

1995 ◽  
Vol 92 (1) ◽  
pp. 136-140 ◽  
Author(s):  
J. L. Sherley ◽  
P. B. Stadler ◽  
D. R. Johnson
Keyword(s):  
Stem Cell ◽  
Cell Division ◽  
Guanine Nucleotide ◽  
Wild Type ◽  
Stem Cell Division ◽  
Wild Type P53

scholarly journals A Chromatin-associated Kinesin-related Protein Required for Normal Mitotic Chromosome Segregation in Drosophila

1997 ◽  
Vol 139 (6) ◽  
pp. 1361-1371 ◽  
Author(s):  
Isabel Molina ◽  
Sigrid Baars ◽  
Julie A. Brill ◽  
Karen G. Hales ◽  
Margaret T. Fuller ◽  
...  
Keyword(s):  
Cell Division ◽  
Gene Product ◽  
Chromosome Segregation ◽  
Mitotic Chromosome ◽  
Related Protein ◽  
Wild Type ◽  
Type Function ◽  
Microtubule Motor ◽  
Mitotic Figures ◽  
Bipolar Spindles

The tiovivo (tio) gene of Drosophila encodes a kinesin-related protein, KLP38B, that colocalizes with condensed chromatin during cell division. Wild-type function of the tio gene product KLP38B is required for normal chromosome segregation during mitosis. Mitotic cells in tio larval brains displayed circular mitotic figures, increased ploidy, and abnormal anaphase figures. KLP38B mRNA is maternally provided and expressed in cells about to undergo division. We propose that KLP38B, perhaps redundantly with other chromosome-associated microtubule motor proteins, contributes to interactions between chromosome arms and microtubules important for establishing bipolar attachment of chromosomes and assembly of stable bipolar spindles.

scholarly journals Mechanisms of maternal inheritance. II. RNA synthesis involved in preferential destruction of chloroplast DNA of male origin.

1983 ◽  
Vol 59 (6) ◽  
pp. 182-185 ◽  
Author(s):  
Tsuneyoshi KUROIWA ◽  
Shigeyuki KAWANO ◽  
Chubun SATO
Keyword(s):  
Chloroplast Dna ◽  
Rna Synthesis ◽  
Maternal Inheritance

Dosage dependence of maternal contribution to somatic cell division in Drosophila melanogaster

Development ◽  
1991 ◽  
Vol 113 (4) ◽  
pp. 1357-1364 ◽  
Author(s):  
M. Carmena ◽  
C. Gonzalez ◽  
J. Casal ◽  
P. Ripoll
Keyword(s):  
Drosophila Melanogaster ◽  
Cell Division ◽  
Somatic Cell ◽  
Early Development ◽  
Normal Cell ◽  
Chromosome Behaviour ◽  
Wild Type ◽  
Maternal Contribution ◽  
Different Doses ◽  
Chromosome Nondisjunction

Most mitotic mutants in Drosophila do not lead to lethality in early development despite the highly abnormal chromosome behaviour that they elicit. This has been explained as being the effect of maternally provided wild-type products. We have tested this hypothesis by studying cuticular clones derived from cells in which there has been loss of a marked Y chromosome due to chromosome nondisjunction in individuals homozygous for the mutation abnormal spindle who are progeny of heterozygous mothers. We have found that the size and frequency of these clones are higher than in control flies. Furthermore, by analysing flies whose female parents have different doses of the asp+ gene, we have found that there is a correlation between the amount of maternally contributed asp+ product and the frequency and size of cuticular clones. We have also estimated the time in development when the first mitotic mistakes take place, i.e. the time when maternal products are no longer sufficient to carry out normal cell division.

scholarly journals Analysis of MinC Reveals Two Independent Domains Involved in Interaction with MinD and FtsZ

2000 ◽  
Vol 182 (14) ◽  
pp. 3965-3971 ◽  
Author(s):  
Zonglin Hu ◽  
Joe Lutkenhaus
Keyword(s):  
Escherichia Coli ◽  
Cell Division ◽  
Functional Domains ◽  
Wild Type ◽  
Terminal Domain ◽  
Ring Assembly ◽  
Z Ring ◽  
Ftsz Assembly

ABSTRACT In Escherichia coli FtsZ assembles into a Z ring at midcell while assembly at polar sites is prevented by themin system. MinC, a component of this system, is an inhibitor of FtsZ assembly that is positioned within the cell by interaction with MinDE. In this study we found that MinC consists of two functional domains connected by a short linker. When fused to MalE the N-terminal domain is able to inhibit cell division and prevent FtsZ assembly in vitro. The C-terminal domain interacts with MinD, and expression in wild-type cells as a MalE fusion disrupts minfunction, resulting in a minicell phenotype. We also find that MinC is an oligomer, probably a dimer. Although the C-terminal domain is clearly sufficient for oligomerization, the N-terminal domain also promotes oligomerization. These results demonstrate that MinC consists of two independently functioning domains: an N-terminal domain capable of inhibiting FtsZ assembly and a C-terminal domain responsible for localization of MinC through interaction with MinD. The fusion of these two independent domains is required to achieve topological regulation of Z ring assembly.

Leaf area development of ABA-deficient and wild-type peas at two levels of nitrogen supply

2003 ◽  
Vol 30 (7) ◽  
pp. 777 ◽  
Author(s):  
Ian C. Dodd
Keyword(s):  
Growth Response ◽  
Leaf Growth ◽  
Nitrogen Supply ◽  
Genotypic Differences ◽  
Wild Type ◽  
Ethylene Evolution ◽  
Relative Water ◽  
Ca 50 ◽  
Area Development ◽  
Water Contents

The ABA-deficient wilty pea (Pisum sativum L.) and its wild-type (WT) were grown at two levels of nitrogen supply (0.5 and 5.0 mM) for 5–6 weeks from sowing, to determine whether leaf ABA status altered the leaf growth response to N deprivation. Plants were grown at high relative humidity to prevent wilting of the wilty peas. Irrespective of N supply, expanding wilty leaflets had ca 50% less ABA than WT leaflets but similar ethylene evolution rates. Fully expanded wilty leaflets had lower relative water contents (RWC) and were 10–60% smaller in area (according to the node of measurement) than WT leaflets. However, there were no genotypic differences in plant relative leaf expansion rate (RLER). Growth of both genotypes at 0.5 mM N increased the RWC of fully expanded leaflets, but did not alter ethylene evolution or ABA concentration of expanding leaflets. Plants grown at 0.5 mM N showed a 20–30% reduction in RLER, which was similar in magnitude in both wilty and WT peas. Thus,�leaf ABA status did not alter the leaf growth response to N deprivation.

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