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Related Experiment Videos

Boron stimulates embryonic trout growth

C D Eckhert1

  • 1Department of Environmental Health Sciences, University of California, Los Angeles, CA 90095-1772, USA.

The Journal of Nutrition
|December 30, 1998
PubMed
Summary

Boron significantly stimulates embryonic rainbow trout growth in a dose-dependent manner. This essential element is vital for vertebrate development, showing no adverse teratogenic or microbicidal effects in the studied concentrations.

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Area of Science:

  • Environmental Science
  • Aquatic Toxicology
  • Developmental Biology

Background:

  • Boron is an essential micronutrient for nitrogen fixation in cyanobacteria and cell wall formation in vascular plants.
  • Its role in vertebrate development, however, is less understood.
  • This study investigates the impact of boron on embryonic rainbow trout growth.

Purpose of the Study:

  • To determine the effects of varying boron concentrations on the growth and development of embryonic rainbow trout (Oncorhynchus mykiss).
  • To assess potential teratogenic or microbicidal effects of boron exposure.
  • To evaluate boron's essentiality for vertebrate development.

Main Methods:

  • Fertilized rainbow trout ova were incubated in ultrapure water supplemented with boric acid at concentrations ranging from 2.2 to 936 micromol/L across two spawning seasons (1995 and 1997).
  • Boron concentrations were verified using curcumin procedure and inductively coupled plasma-mass spectrometry.
  • Embryo growth, teratogenicity, and survival were evaluated at key developmental stages: eye, hatch, and 2-week posthatch.

Main Results:

  • Boron exposure significantly stimulated rainbow trout growth in a dose-dependent manner in both studies (P < 0.001).
  • Increased boron body concentration was observed with higher exposure levels (P < 0.05).
  • No teratogenic or microbicidal effects were observed at any tested boron concentration.

Conclusions:

  • Boron is essential for embryonic rainbow trout development, promoting growth without causing developmental abnormalities.
  • These findings support the hypothesis that boron is a vital element for vertebrate development.
  • The study highlights the importance of boron in aquatic ecosystems and its potential role in fish physiology.

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