Role of accelerated developmental pathway and limited nurturing capacity on soldier developmental instability in subterranean termite incipient colonies

2017 ◽  
Vol 64 (4) ◽  
pp. 477-483 ◽  
Author(s):  
T. Chouvenc ◽  
M. Basille ◽  
N.-Y. Su
Keyword(s):  
Developmental Instability ◽  
Subterranean Termite ◽  
Developmental Pathway ◽  
Incipient Colonies

scholarly journals Deletion of the Schizophyllum commune Aα Locus: The Roles of Aα Y and Z Mating-Type Genes

Genetics ◽  
1996 ◽  
Vol 144 (4) ◽  
pp. 1437-1444
Author(s):  
C Ian Robertson ◽  
Kirk A Bartholomew ◽  
Charles P Novotny ◽  
Robert C Ullrich
Keyword(s):  
Mating Type ◽  
Sexual Development ◽  
Schizophyllum Commune ◽  
Mating Types ◽  
Developmental Pathway ◽  
Mating Type Gene ◽  
Mating Type Genes ◽  
Regulatory Loci ◽  
Type Gene

The Aα locus is one of four master regulatory loci that determine mating type and regulate sexual development in Schizophyllum commune. We have made a plasmid containing a URA1 gene disruption of the Aα Y1 gene. Y1 is the sole Aα gene in Aα1 strains. We used the plasmid construction to produce an Aα null (i.e., AαΔ) strain by replacing the genomic Y1 gene with URA1 in an Aα1 strain. To characterize the role of the Aα genes in the regulation of sexual development, we transformed various Aα Y and Z alleles into AαΔ strains and examined the acquired mating types and mating abilities of the transformants. These experiments demonstrate that the Aα Y gene is not essential for fungal viability and growth, that a solitary Z Aα mating-type gene does not itself activate development, that Aβ proteins are sufficient to activate the A developmental pathway in the absence of Aα proteins and confirm that Y and Z genes are the sole determinants of Aα mating type. The data from these experiments support and refine our model of the regulation of A-pathway events by Y and Z proteins.

scholarly journals Bulb Mites Rhizoglyphus echinopus (Fumouze and Robin) Associated with Subterranean Termite (Isoptera) in Brazil

2016 ◽  
Vol 9 (1) ◽  
pp. 65-68 ◽  
Author(s):  
Ademar Ferreira Silva ◽  
Zeneida Teixeira Pinto ◽  
Rebecca Leal Caetano ◽  
César Carriço ◽  
Tayra Pereira Sato ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Ornamental Plants ◽  
Mite Species ◽  
Subterranean Termite ◽  
Relationship Of

Abstract. Four bulb mites deutonymphs (hypopus) from Rhizoglyphus echinopus (Fumouze & Robin) (Acari: Acaridae) were found attached to the head of a subterranean termite belonging to Coptotermes genus in Rio de Janeiro, Brazil. These mite species are commonly associated with ornamental plants and trees with bulbs, corms and tubers. All four hypopus were found attached to the surface of termite’s head. Results from this study provided an insight on the phoretic relationship of mites and termites, indicating the role of the latter in the dispersion of the first.Ácaros do Bulbo Rhizoglyphus echinopus (Fumouze and Robin) Associados com Cupim Subterrâneo (Isoptera) no BrasilResumo. Quatro deutoninfas de ácaros do bulbo (hipopus) da espécie Rhizoglyphus echinopus (Fumouze & Robin) (Acari: Acaridae) foram encontradas fixadas na cabeça do cupim subterraneo pertencente ao gênero Coptotermes no Rio de Janeiro, Brasil. Estas espécies de ácaros estão comumente associadas a plantas ornamentais e plantas com bulbos e turbéculos. As quatros hipopus foram encontradas fixadas na superfície da cabeça do cupim. Os resultados desse estudo fornecem uma visão sobre a relação forética de ácaros e cupins, indicando o papel deste último na dispersão do primeiro.

Role of Propagule Size in the Success of Incipient Colonies of the Invasive Argentine Ant

2000 ◽  
Vol 14 (2) ◽  
pp. 559-563 ◽  
Author(s):  
Jason J. Hee ◽  
David A. Holway ◽  
Andrew V. Suarez ◽  
Ted J. Case
Keyword(s):  
Argentine Ant ◽  
Propagule Size ◽  
Incipient Colonies

scholarly journals The Dual-Specificity Protein Phosphatase Yvh1p Acts Upstream of the Protein Kinase Mck1p in Promoting Spore Development in Saccharomyces cerevisiae

1999 ◽  
Vol 181 (17) ◽  
pp. 5219-5224 ◽  
Author(s):  
Alexander E. Beeser ◽  
Terrance G. Cooper
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Protein Phosphatase ◽  
Vegetative Growth ◽  
Nitrogen Starvation ◽  
Developmental Pathway ◽  
Dual Specificity ◽  
Dual Specificity Protein Phosphatase ◽  
Specificity Protein ◽  
Spore Maturation

ABSTRACT Diploid Saccharomyces cerevisiae cells induce YVH1 expression and enter the developmental pathway, leading to sporulation when starved for nitrogen. We show that yvh1 disruption causes a defect in spore maturation; overexpression of MCK1or IME1 suppresses this yvh1 phenotype. Whilemck1 mutations are epistatic to those in yvh1relative to spore maturation, overexpression of MCK1 does not suppress the yvh1 slow-vegetative-growth phenotype. We conclude that (i) Yvh1p functions earlier than Mck1p and Ime1p in the signal transduction cascade that regulates sporulation and is triggered by nitrogen starvation and (ii) the role of Yvh1p in gametogenesis can be genetically distinguished from its role in vegetative growth.

scholarly journals Landscape Factors Associated with Subterranean Termite (Isoptera: Rhinotermitidae) Treatments and Colony Structure in Residential Subdivisions

Sociobiology ◽  
2018 ◽  
Vol 65 (1) ◽  
pp. 67
Author(s):  
Paul Steven Botch ◽  
Richard M. Houseman
Keyword(s):  
Agricultural Landscapes ◽  
Subterranean Termite ◽  
Forest Patches ◽  
Significant Difference ◽  
Forested Landscapes ◽  
Undisturbed Forest ◽  
Landscape Factors ◽  
Bait Stations ◽  
Gis Software

Subterranean termites (Isoptera: Reticulitermes) are common structural pests, but it is not well known how landscape factors are associated with urban colonization. This study examined patterns of subterranean termite colonization in 13 mid-Missouri residential subdivisions. Ten- and 20-year-old homes built on historically agricultural and forested landscapes were inspected for treatment by termiticide application or bait stations. Contemporary and historical aerial imagery were analyzed using GIS software, and patterns of colonization were compared among subdivisions. The genetic structure of termite colonies collected in undeveloped landscapes and residential subdivisions was compared using microsatellite DNA. Twenty-year-old subdivisions had significantly higher treatment proportions than 10-year-old subdivisions. At year 10, historically forested subdivisions had a higher treatment proportion than historically agricultural subdivisions. By year 20, there was no significant difference in treatment proportion between historical landscape types, indicating that subdivisions built on agricultural landscapes eventually catch up to subdivisions built on forest landscapes. Although there was not strong statistical support, treated homes in historically agricultural subdivisions tended to be close to forest patches, but there was less of an association in historically forested subdivisions. Colonies in undeveloped landscapes were more inbred compared to colonies in residential subdivisions, indicating that colonies sampled in subdivisions had fewer secondary reproductive and were potentially younger than those sampled in undeveloped landscapes. This study provides some correlative support for the role of dispersing alates as urban colonizers, because treatments were often located at relatively long distances from undisturbed forest patches in historically agricultural subdivisions.

Identifying loci required for follicular patterning using directed mosaics

Development ◽  
1998 ◽  
Vol 125 (12) ◽  
pp. 2263-2271 ◽  
Author(s):  
J.B. Duffy ◽  
D.A. Harrison ◽  
N. Perrimon
Keyword(s):  
Cell Migration ◽  
Cell Shape ◽  
Egf Receptor ◽  
Essential Genes ◽  
Follicular Epithelium ◽  
Loss Of Function ◽  
Developmental Pathway ◽  
Adult Tissues ◽  
Phenotypic Screen

We have developed a ‘directed mosaic’ system in Drosophila by using the GAL4 system to control the expression of the yeast recombinase, FLP, in a spatial and temporal fashion. By directing FLP expression, we show that it is possible to efficiently and specifically target loss-of-function studies for vital loci to the developmental pathway of interest. A simple F1 adult phenotypic screen demonstrated that most adult tissues can be analyzed with this approach. Using GAL4 lines expressed during oogenesis, we have refined the system to examine the roles of vital loci in the development of the follicular epithelium. We have identified essential genes involved in egg chamber organization, cell migration and cell shape. Further, we have used this technique to gain insights into the role of the Drosophila EGF receptor pathway in establishing the egg axes. Finally, using different UAS-FLP, GAL4 and existing FRT lines, we have built stocks that permit the analysis of approximately 95% of the genome in follicular mosaics.

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