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· An explanation grounded in the cited sources

Leaf

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A leaf is an organ of a vascular plant. Its structure can be explored from the whole leaf to tissue, cell and chloroplast.

[1] [2]
Evidence for this statement

Source-based explanation

Example: Arabidopsis thaliana basal leaf; photographed 14 April 2021
Example: Arabidopsis thaliana basal leaf; photographed 14 April 2021Teaching material · Stefan.lefnaer · CC-BY-SA-4.0 · Original and attribution

Palisade mesophyll is one of the tissues of a leaf. Plant Ontology relates this tissue to the leaf through a part-of relation. This defines a structure rather than measuring a particular plant.

[1] [2]
Evidence for this statement

Source-based explanation

The photograph shows a basal leaf of Arabidopsis thaliana. Other materials use different specimens: moving between images is not a continuous zoom into one individual.

[1] [2]
Evidence for this statement

Source-based explanation

Connected concepts

Spruce needles

Needles provide an accessible starting point for exploring a spruce. Picea abies typically has four-sided needles about 1–2.5 cm long.

[3]
Evidence for this statement

Source-based explanation

Palisade mesophyll cell

A palisade mesophyll cell is a particular plant cell type. In Plant Ontology it belongs to palisade tissue, which is part of a leaf.

[1] [4]
Evidence for this statement

Source-based explanation

Continue with an organism

The photographs and molecular record come from separate source materials.

Norway spruce →Arabidopsis thaliana →

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Sources and versions

An explanation grounded in the cited sources

  1. Plant Ontology · 2026-01-09

    2026-09-04 · CC-BY-4.0

    Provenance and original
    Source version
    2026-01-09 / f5e2a95d88fe08af22f49e522cc78481d990a0b0
  2. Arabidopsis thaliana basal leaf; photographed 14 April 2021

    Retrieval date unknown · CC BY-SA 4.0

    Provenance and original
    Original SHA-256
    4c0da1e60a566728712e6443d8dfa11d4f4cd0084a0ef454d1262a3cdf05fa39
    Processing
    Resized and encoded as WebP; original 5 mm scale retained.
  3. Caudullo, Tinner & de Rigo · Picea abies in Europe · p.114

    2026-09-06 · Reuse permission unverified

    Provenance and original
    Source version
    2016
  4. Arabidopsis thaliana Col-4, leaf 6, 19 days after initiation; Figure 2a, mature palisade mesophyll

    Retrieval date unknown · CC BY 2.0

    Provenance and original
    Original SHA-256
    5510c5c1dba4162b182eed9ae054d2e97c25cc529740a5125ffcb1fd1c001b3c
    Processing
    Mature palisade panel extracted from Figure 2a; encoded as WebP. The shared scale bar is outside this panel and remains available in the full source figure.
Inspect structured data
Content version
817942d8cceebffa841b0523d1af84bea630b3860691696cb8d50a9b4592051b
Source version
knowledge-20260909.1
Updated
2026-09-09