Predator-Induced Defenses in Ciliated Protozoa

2021 ◽  
pp. 142-159
Author(s):  
HANS-WERNER KUHLMANN ◽  
JÜRGEN KUSCH ◽  
KLAUS HECKMANN
Keyword(s):  
Induced Defenses ◽  
Ciliated Protozoa

Five new species of Trichostomatida (ciliated protozoa) from the colon of wild African rhinoceroses

1994 ◽  
Vol 28 (3) ◽  
pp. 187-196 ◽  
Author(s):  
F. M. C. Gilchrist ◽  
W. van Hoven ◽  
M. O. Stenson
Keyword(s):  
New Species ◽  
Ciliated Protozoa

Alien versus predators: effective induced defenses of an invasive frog in response to native predators

2016 ◽  
Vol 301 (3) ◽  
pp. 227-234 ◽  
Author(s):  
E. Pujol-Buxó ◽  
C. García-Guerrero ◽  
G. A. Llorente
Keyword(s):  
Induced Defenses

scholarly journals A Developmentally Regulated Gene, ASI2, Is Required for Endocycling in the Macronuclear Anlagen of Tetrahymena

2010 ◽  
Vol 9 (9) ◽  
pp. 1343-1353 ◽  
Author(s):  
Lihui Yin ◽  
Susan T. Gater ◽  
Kathleen M. Karrer
Keyword(s):  
Signal Transduction ◽  
Mitotic Cycle ◽  
Tetrahymena Thermophila ◽  
Germ Line ◽  
Ciliated Protozoa ◽  
Dna Rearrangement ◽  
Developmentally Regulated ◽  
Content Type ◽  
Molecular Events ◽  
Multicellular Organisms

ABSTRACT Ciliated protozoa contain two types of nuclei, germ line micronuclei (Mic) and transcriptionally active macronuclei (Mac). During sexual reproduction, the parental Mac degenerates and a new Mac develops from a mitotic product of the zygotic Mic. Macronuclear development involves extensive endoreplication of the genome. The present study shows that endoreplication of macronuclear DNA in Tetrahymena is an example of endocyling, a variant of the mitotic cycle with alternating S and G phases in the absence of cell division. Thus, endocycling is conserved from ciliates to multicellular organisms. The gene ASI2 in Tetrahymena thermophila encodes a putative signal transduction receptor. ASI2 is nonessential for vegetative growth, but it is upregulated during development of the new Mac. Cells that lack ASI2 in the developing Mac anlagen are arrested in endoreplication of the DNA and die. This study shows that ASI2 is also transcribed in the parental Mac early in conjugation and that transcription of ASI2 in the parental Mac supports endoreplication of the DNA during early stages of development of the Mac anlagen. Other molecular events in Mac anlage development, including developmentally regulated DNA rearrangement, occur normally in matings between ASI2 knockouts, suggesting that ASI2 specifically regulates endocycling in Tetrahymena.

Proposed Genetic Nomenclature Rules for Tetrahymena thermophila, Paramecium primaurelia and Paramecium tetraurelia

Genetics ◽  
1998 ◽  
Vol 149 (1) ◽  
pp. 459-462 ◽  
Author(s):  
◽  
Sally Lyman Allen ◽  
Marsha I Altschuler ◽  
Peter J Bruns ◽  
Jean Cohen ◽  
...  
Keyword(s):  
Tetrahymena Thermophila ◽  
Ciliated Protozoa ◽  
Paramecium Tetraurelia ◽  
Short Introduction ◽  
Genetic Nomenclature

Abstract The genetics of the ciliated protozoa Tetrahymena thermophila and certain species of Paramecium (P. primaurelia and P. tetraurelia) have reached a level of maturity such that rules for genetic nomenclature for micronuclear and macronuclear genetics need to be clarified for workers in the field as well as for other geneticists. After a short introduction, the rules follow.

scholarly journals Plant genotype and induced defenses affect the productivity of an insect-killing obligate viral pathogen

2017 ◽  
Vol 148 ◽  
pp. 34-42 ◽  
Author(s):  
Ikkei Shikano ◽  
Elizabeth M. McCarthy ◽  
Bret D. Elderd ◽  
Kelli Hoover
Keyword(s):  
Induced Defenses ◽  
Plant Genotype ◽  
Viral Pathogen
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