Expresión diurna y estacional del gen hsp70 en un pez críptico arrecifal, el gobio azul rayado Lythrypnus dalli (Gilbert 1890)

Authors

  • Priscila Conde-Guerrero
  • Tania Zenteno-Savín Centro de Investigaciones Biológicas del Noroeste, S.C. https://orcid.org/0000-0002-4080-9467
  • Crisalejandra Rivera-Pérez
  • Fausto Valenzuela-Quiñonez
  • Juan Antonio De Anda-Montañez

DOI:

https://doi.org/10.18633/biotecnia.v23i2.1410

Keywords:

circadian rhythm, cryptic reef fish, heat shock protein 70, Lythrypnus dalli, temperature

Abstract

Physiological responses of marine organisms are influenced by environmental variations, particularly in dynamic habitats. These variations could be at a diel or seasonal scale and require acclimation responses that, at a molecular level, are facilitated by gene expression regulation. Circadian rhythms allow organisms to adjust to recurring environmental changes and to synchronize physiological processes. Increased Hsp70 gene expression allows organisms to protect themselves against heat and other stressors, conferring them a periodically changing thermotolerance. This study aimed at analyzing whether the variability of exogenous factors (temperature, dissolved oxygen, salinity) in diurnal or seasonal scales affects hsp70 expression in cryptic reef fishes in their natural environment. The study model was Lythrypnus dalli, an endemic cryptic reef fish inhabiting shallow waters throughout the Gulf of California. Physical parameters varied seasonally; temperature increased 6°C during the warm season, salinity and dissolved oxygen remained constant. Minimal changes in temperature (±1 °C) occurred diurnally. Expression levels of hsp70 increased significantly during the warm season (p < 0.05), perhaps related to seasonal thermal changes. No differences in hsp70 were observed during the diurnal cycle (p > 0.05). L. dalli has apparently developed phenotypic plasticity to face environmental variability at diurnal and seasonal scales.

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Published

2021-06-16

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Conde-Guerrero, P., Zenteno-Savín, T., Rivera-Pérez, C., Valenzuela-Quiñonez, F., & De Anda-Montañez, J. A. (2021). Expresión diurna y estacional del gen hsp70 en un pez críptico arrecifal, el gobio azul rayado Lythrypnus dalli (Gilbert 1890). Biotecnia, 23(2). https://doi.org/10.18633/biotecnia.v23i2.1410

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