Abstract
The structure of the stomatal apparatus of the leaf of Lycopodium japonicum Thumb was studied using epidermal macerations, sections and scanning electron microscopy. The stomatal apparatus of L. japonicum consists of two large guard cells and pore, and is anomocytic. Based on light microscopy, the impression from epidermal macerations that there were two small guard cells surrounded by two, large, similarly shaped, subsidiary cells (paracytic) derives from a pronounced elliptical cuticular ledge on the surface of the guard cells surrounding a thickened circumporal area. A similar appearance is characteristic of cuticle preparations of the Devonian lycophyte Drepanophycus spinaeformis Göppert. We therefore conclude, as did W.H. Lang over 70 years ago, that the stomata of the early lycophyte were also anomocytic, as were those of a second species of Drepanophycus, D. qujingensis Li & Edwards.
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Claims 5
Claim · model-written summary
L. japonicum stomata have two large guard cells and a pore and are anomocytic.
- Taxon
- L. japonicum
_-_DPLA_-_0cdbef1f4e530c0cfd9e0c49081c1d31.jpg?width=60)
Lycopodium japonicume0 - Organ / stage
- stomatal apparatuse0
- Outcome
- two large guard cells and pore, and is anomocytice0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_DPLA_-_0cdbef1f4e530c0cfd9e0c49081c1d31.jpg?width=500)
Verbatim
e0“The stomatal apparatus of L. japonicum consists of two large guard cells and pore, and is anomocytic”
Claim · model-written summary
The paracytic appearance in macerations arises from an elliptical cuticular ledge on the guard cells.
- Taxon
- Lycopodium japonicumLycopodium japonicume1
- Organ / stage
- guard cellse0
- Outcome
- impression from epidermal macerationse0
- Qualifier
- pronounced elliptical cuticular ledgee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the impression from epidermal macerations that there were two small guard cells surrounded by two, large, similarly shaped, subsidiary cells (paracytic) derives from a pronounced elliptical cuticular ledge on the surface of the guard cells surrounding a thickened circumporal area”
e1“Lycopodium japonicum Thumb”
Claim · model-written summary
Drepanophycus spinaeformis cuticles show a similar stomatal appearance.
Not reportedDirection
Verbatim
e0“A similar appearance is characteristic of cuticle preparations of the Devonian lycophyte Drepanophycus spinaeformis Göppert”
Claim · model-written summary
The authors conclude that early Drepanophycus stomata were anomocytic.
Not reportedDirection
Verbatim
e0“the stomata of the early lycophyte were also anomocytic”
e1“Drepanophycus spinaeformis Göppert”
Claim · model-written summary
D. qujingensis stomata were also anomocytic.
Not reportedDirection
Verbatim
e0“those of a second species of Drepanophycus, D. qujingensis Li & Edwards”
e1“the stomata of the early lycophyte were also anomocytic”