scholarly journals Prothoracicotropic Hormone Regulates Developmental Timing and Body Size in Drosophila

2007 ◽  
Vol 13 (6) ◽  
pp. 857-871 ◽  
Author(s):  
Zofeyah McBrayer ◽  
Hajime Ono ◽  
MaryJane Shimell ◽  
Jean-Philippe Parvy ◽  
Robert B. Beckstead ◽  
...  
Keyword(s):  
Body Size ◽  
Developmental Timing ◽  
Prothoracicotropic Hormone

Severe developmental timing defects in the prothoracicotropic hormone (PTTH)-deficient silkworm, Bombyx mori

2017 ◽  
Vol 87 ◽  
pp. 14-25 ◽  
Author(s):  
Miwa Uchibori-Asano ◽  
Takumi Kayukawa ◽  
Hideki Sezutsu ◽  
Tetsuro Shinoda ◽  
Takaaki Daimon
Keyword(s):  
Bombyx Mori ◽  
Developmental Timing ◽  
Prothoracicotropic Hormone ◽  
Silkworm Bombyx Mori ◽  
Timing Defects

scholarly journals A large close relative of C. elegans is slow-developing but not long-lived

2018 ◽  
Author(s):  
Gavin C. Woodruff ◽  
Erik Johnson ◽  
Patrick C. Phillips
Keyword(s):  
Life History ◽  
Body Size ◽  
Reproductive Mode ◽  
Developmental Timing ◽  
Close Relative ◽  
Female Reproduction ◽  
Evolutionary Patterns ◽  
Adult Lifespan ◽  
C Elegans ◽  
Geographic Origins

AbstractBackgroundVariation in body size is thought to be a major driver of a wide variety of ecological and evolutionary patterns, including changes in development, reproduction, and longevity. Caenorhabditis inopinata is a recently-discovered fig-associated nematode that is unusually large relative to other members of the genus, including the closely related model system C. elegans. Here we test whether the dramatic increase in body size has led to correlated changes in key life history and developmental parameters within this species.ResultsUsing four developmental milestones, C. inopinata was found to have a slower rate of development than C. elegans across a range of temperatures. Despite this, C. inopinata did not reveal any differences in adult lifespan from C. elegans after accounting for differences in developmental timing and reproductive mode. C. inopinata fecundity was generally lower than that of C. elegans, but fitness improved under continuous-mating, consistent with sperm-limitation under gonochoristic (male/female) reproduction. C. inopinata also revealed greater fecundity and viability at higher temperatures.ConclusionConsistent with observations in other ectotherms, slower growth in C. inopinata indicates a potential trade-off between body size and developmental timing, whereas its unchanged lifespan suggests that longevity is largely uncoupled from its increase in body size. Additionally, temperature-dependent patterns of fitness in C. inopinata are consistent with its geographic origins in subtropical Okinawa. Overall, these results underscore the extent to which changes in ecological context and body size can shape life history traits.

scholarly journals Prothoracicotropic hormone modulates environmental adaptive plasticity through the control of developmental timing

Development ◽  
2018 ◽  
Vol 145 (6) ◽  
pp. dev159699 ◽  
Author(s):  
MaryJane Shimell ◽  
Xueyang Pan ◽  
Francisco A. Martin ◽  
Arpan C. Ghosh ◽  
Pierre Leopold ◽  
...  
Keyword(s):  
Adaptive Plasticity ◽  
Developmental Timing ◽  
Prothoracicotropic Hormone
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