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Related Concept Videos

Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Mutations01:39

Mutations

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Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
Cross-reactivity00:42

Cross-reactivity

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UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...

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Related Experiment Video

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The Lambda Select cII Mutation Detection System
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ABA says NO to UV-B: a universal response?

Vanesa Tossi1, Raul Cassia, Santina Bruzzone

  • 1Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina.

Trends in Plant Science
|June 16, 2012
PubMed
Summary

Abscisic acid (ABA) is found in animals, not just plants. ABA, nitric oxide (NO), and Ca(2+) signaling in plants and animals suggest a conserved UV-B stress response mechanism across diverse species.

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Area of Science:

  • Plant and animal biology
  • Environmental stress response
  • Evolutionary biology

Background:

  • Abscisic acid (ABA) signaling is well-studied in plants but less understood in animals.
  • Recent findings reveal ABA production in various animal species, including mammals.
  • Environmental stressors like ultraviolet (UV)-B radiation impact diverse organisms.

Purpose of the Study:

  • To propose a conserved signaling mechanism activated by UV-B radiation in both plant and animal cells.
  • To re-evaluate ABA signaling pathways in light of its presence in animals.
  • To explore the evolutionary implications of shared stress response components.

Main Methods:

  • Literature review and synthesis of existing research on ABA, nitric oxide (NO), and Ca(2+) signaling.
  • Comparative analysis of signaling pathways in plants and animals under UV-B stress.
  • Theoretical proposal based on current evidence.

Main Results:

  • Abscisic acid (ABA) is produced by a wide range of lower animals and higher mammals.
  • Common signaling components, including ABA, NO, and Ca(2+), are induced in plant and animal cells by high doses of UV-B.
  • This induction suggests a conserved response to UV-B stress.

Conclusions:

  • The evolution of a general UV-B activated mechanism appears conserved in divergent multicellular organisms.
  • Shared signaling components indicate a common evolutionary adaptation to environmental challenges.
  • ABA signaling may play a broader role in animal physiology than previously recognized.