Chemicals and Drugs

Phytochrome B

A plant photo regulatory protein that exists in two forms that are reversibly interconvertible by LIGHT. In response to light it moves to the CELL NUCLEUS and regulates transcription of target genes. Phytochrome B plays an important role in shade avoidance and mediates plant de-etiolation in red light.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A plant photo regulatory protein that exists in two forms that are reversibly interconvertible by LIGHT. In response to light it moves to the CELL NUCLEUS and regulates transcription of target genes. Phytochrome B plays an important role in shade avoidance and mediates plant de-etiolation in red light.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • PhyB Phytochrome
  • Phytochrome B Protein
  • Phytochrome, PhyB

MeSH Record

Aspects Covered

30 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2006(1991)

MeSH Hierarchy

Tree Numbers

  1. D12.776w.765w.675w.500
  2. D23.767w.712w.500

AMA Style

References

  1. National Library of Medicine. Phytochrome B. Medical Subject Headings (MeSH). 2026. Unique ID D051939. http://id.nlm.nih.gov/mesh/2026/D051939
  2. Phytochrome B. In: Wikidata. https://www.wikidata.org/wiki/Q58516550