Abstract
A passive system that may be useful for measuring changes of the redox potential of in vivo, extracellular plant tissue has been developed within the past few years. The technique involves the placement of a small (250 μm diam) noble metal probe into the anatomical region of interest and subsequent monitoring of the time variation in the measured electrode potential of this probe. The result of this measuring technique has been termed an electrophytogram. The observed voltage fluctuations may be empirically correlated with several observable plant growth phenomena. However, elucidation of the physiological basis for electrophytograms must involve the proper anatomical interpretation of the position of the probe relative to the plant tissue. This paper reports the results of freeze‐fracture electron microscopic examination of the probe/tissue interface after wound healing has occurred. Electron micrographs clearly show cell wall material, appressed directly against the probe. These results indicate that the electrophytogram system provides a method for monitoring the electrochemical status of the cell wall space. Insertion of the probe into mature, fully elongated tissue appears to cause little physical damage to non‐xylem tissue organization beyond the adjacent cell layers and virtually no damage to the xylem region.
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Claims 4
Claim · model-written summary
Electron micrographs show cell wall material appressed directly against the probe after wound healing
- Taxon
- cotton
Gossypium hirsutumt0 - Outcome
- cell wall materiale1
- Qualifier
- appressed directly against the probee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON TISSUE”
e1“Electron micrographs clearly show cell wall material, appressed directly against the probe”
Claim · model-written summary
The electrophytogram system provides a method for monitoring the electrochemical status of the cell wall space
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- electrochemical status of the cell wall spacee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: method provision; no comparator or value stated
Verbatim
t0“COTTON TISSUE”
e2“the electrophytogram system provides a method for monitoring the electrochemical status of the cell wall space”
Claim · model-written summary
Insertion of the probe into mature, fully elongated cotton tissue causes little physical damage beyond the adjacent cell layers
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- mature, fully elongated tissuee3
- Treatment
- Insertion of the probe into mature, fully elongated tissuee3
- Outcome
- physical damagee3
- Qualifier
- beyond the adjacent cell layerse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON TISSUE”
e3“Insertion of the probe into mature, fully elongated tissue appears to cause little physical damage”
e5“beyond the adjacent cell layers and virtually no damage to the xylem region”
Claim · model-written summary
Insertion of the probe into mature, fully elongated cotton tissue causes virtually no damage to the xylem region
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- xylem regione5
- Outcome
- damage to the xylem regione5
- Qualifier
- virtually noe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON TISSUE”
e5“beyond the adjacent cell layers and virtually no damage to the xylem region”