scholarly journals DISENTANGLING THE ROLE OF PHENOTYPIC PLASTICITY AND GENETIC DIVERGENCE IN CONTEMPORARY ECOTYPE FORMATION DURING A BIOLOGICAL INVASION

Evolution ◽  
2014 ◽  
Vol 68 (9) ◽  
pp. 2619-2632 ◽  
Author(s):  
Kay Lucek ◽  
Arjun Sivasundar ◽  
Ole Seehausen

Author(s):  
H. Frederik Nijhout ◽  
Emily Laub

Many behaviors of insects are stimulated, modified, or modulated by hormones. The principal hormones involved are the same as the ones that control moulting, metamorphosis, and other aspects of development, principally ecdysone and juvenile hormone. In addition, a small handful of neurosecretory hormones are involved in the control of specific behaviors. Because behavior is a plastic trait, this chapter begins by outlining the biology and hormonal control of phenotypic plasticity in insects, and how the hormonal control of behavior fits in with other aspects of the control of phenotypic plasticity. The rest of the chapter is organized around the diversity of behaviors that are known to be controlled by or affected by hormones. These include eclosion and moulting behavior, the synthesis and release of pheromones, migration, parental care, dominance, reproductive behavior, and social behavior.





Mycorrhiza ◽  
2008 ◽  
Vol 18 (6-7) ◽  
pp. 317-329 ◽  
Author(s):  
Mariela Echeverria ◽  
Agustina Azul Scambato ◽  
Analía Inés Sannazzaro ◽  
Santiago Maiale ◽  
Oscar Adolfo Ruiz ◽  
...  




2020 ◽  
Vol 6 (21) ◽  
pp. eaba3388 ◽  
Author(s):  
Wei-Chin Ho ◽  
Diyan Li ◽  
Qing Zhu ◽  
Jianzhi Zhang

Phenotypic plasticity refers to environment-induced phenotypic changes without mutation and is present in all organisms. The role of phenotypic plasticity in organismal adaptations to novel environments has attracted much attention, but its role in readaptations to ancestral environments is understudied. To address this question, we use the reciprocal transplant approach to investigate the multitissue transcriptomes of chickens adapted to the Tibetan Plateau and adjacent lowland. While many genetic transcriptomic changes had occurred in the forward adaptation to the highland, plastic changes largely transform the transcriptomes to the preferred state when Tibetan chickens are brought back to the lowland. The same trend holds for egg hatchability, a key component of the chicken fitness. These findings, along with highly similar patterns in comparable experiments of guppies and Escherichia coli, demonstrate that organisms generally “remember” their ancestral environments via phenotypic plasticity and reveal a mechanism by which past experience affects future evolution.



2017 ◽  
Vol 284 (1853) ◽  
pp. 20170236 ◽  
Author(s):  
Ricardo J. Pereira ◽  
Matthew C. Sasaki ◽  
Ronald S. Burton

Understanding how populations adapt to heterogeneous thermal regimes is essential for comprehending how latitudinal gradients in species diversification are formed, and how taxa will respond to ongoing climate change. Adaptation can occur by innate genetic factors, by phenotypic plasticity, or by a combination of both mechanisms. Yet, the relative contribution of such mechanisms to large-scale latitudinal gradients of thermal tolerance across conspecific populations remains unclear. We examine thermal performance in 11 populations of the intertidal copepod Tigriopus californicus , ranging from Baja California Sur (Mexico) to British Columbia (Canada). Common garden experiments show that survivorship to acute heat-stress differs between populations (by up to 3.8°C in LD 50 values), reflecting a strong genetic thermal adaptation. Using a split-brood experiment with two rearing temperatures, we also show that developmental phenotypic plasticity is beneficial to thermal tolerance (by up to 1.3°C), and that this effect differs across populations. Although genetic divergence in heat tolerance strongly correlates with latitude and temperature, differences in the plastic response do not. In the context of climate warming, our results confirm the general prediction that low-latitude populations are most susceptible to local extinction because genetic adaptation has placed physiological limits closer to current environmental maxima, but our results also contradict the prediction that phenotypic plasticity is constrained at lower latitudes.



2006 ◽  
Vol 9 (8) ◽  
pp. 981-993 ◽  
Author(s):  
Christina L. Richards ◽  
Oliver Bossdorf ◽  
Norris Z. Muth ◽  
Jessica Gurevitch ◽  
Massimo Pigliucci


2009 ◽  
Vol 23 (4) ◽  
pp. 325-332 ◽  
Author(s):  
T. C. NGUYEN ◽  
L. MORERA ◽  
D. LLANES ◽  
P. LEGER


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