Anatomy

Hypocotyl

The region of the stem beneath the stalks of the seed leaves (cotyledons) and directly above the young root of the embryo plant. It grows rapidly in seedlings showing epigeal germination and lifts the cotyledons above the soil surface. In this region (the transition zone) the arrangement of vascular bundles in the root changes to that of the stem. (From Concise Dictionary of Biology, 1990)

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The region of the stem beneath the stalks of the seed leaves (cotyledons) and directly above the young root of the embryo plant. It grows rapidly in seedlings showing epigeal germination and lifts the cotyledons above the soil surface. In this region (the transition zone) the arrangement of vascular bundles in the root changes to that of the stem. (From Concise Dictionary of Biology, 1990)

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

1 entry terms
  • Hypocotyls

MeSH Record

Aspects Covered

20 allowable subheadings

Indexed with the subheadings adverse effects, anatomy & histology, chemistry, classification, cytology, drug effects, embryology, enzymology, genetics, growth & development, immunology, metabolism, microbiology, parasitology, physiology, poisoning, radiation effects, toxicity, ultrastructure, virology.

MeSH Record

Indexing Annotation

coordinate with specific plant

MeSH Record

History Note

95

MeSH Record

Previous Indexing

  • Plants (1966-1994)

MeSH Hierarchy

Tree Numbers

  1. A18.024.875w.750w
  2. A18.024.937w.249w
  3. A18.550w.500w

AMA Style

References

  1. National Library of Medicine. Hypocotyl. Medical Subject Headings (MeSH). 2026. Unique ID D018546. http://id.nlm.nih.gov/mesh/2026/D018546
  2. Hypocotyl. In: Wikipedia. https://en.wikipedia.org/wiki/Hypocotyl
  3. Hypocotyl. In: Wikidata. https://www.wikidata.org/wiki/Q1426202