Abstract
The time course of (36)Cl(-) uptake from 5 mm KCl by 1.5-mm leaf segments of Triticum aestivum L. seedlings has been determined over 24 hours both in the light and in the dark. A light-enhanced uptake of Cl(-) develops after a few hours. Using whole laminae which have been water-injected by vacuum infiltration, a light-enhanced uptake is apparent from zero time. Uptake values achieved in the light by the two types of tissue are similar but in the dark there is a restricted uptake by the whole infiltrated laminae. It is considered that the slower uptake by whole laminae relative to chopped tissue in the dark is due to cuticular resistance to solute penetration, whereas in the light the impediment is overcome by stomatal opening. A light-enhanced uptake unrelated to stomatal opening is discernible in both tissues. Its energetic basis has not been defined but may be related to substrate exhaustion. The absorption mechanism is not impaired by vacuum infiltration.
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Claims 9
Claim · model-written summary
A light-enhanced uptake of chloride developed after a few hours in wheat leaf segments.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- lighte1
- Outcome
- uptake of Cl(-)e1
- Direction
- enhancede1
- Qualifier
- after a few hourse1
- Comparator
- darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both in the light and in the dark”
e1“A light-enhanced uptake of Cl(-) develops after a few hours”
t0“Wheat”
Claim · model-written summary
In whole water-infiltrated laminae, light-enhanced chloride uptake was apparent from zero time.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- whole laminaee1
- Treatment
- lighte1
- Outcome
- uptakee1
- Direction
- enhancede1
- Qualifier
- apparent from zero timee1
- Comparator
- darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both in the light and in the dark”
e1“Using whole laminae which have been water-injected by vacuum infiltration, a light-enhanced uptake is apparent from zero time”
t0“Wheat”
Claim · model-written summary
Chloride uptake values achieved in the light were similar in the two tissue types.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- two types of tissuee0
- Outcome
- Uptake values achieved in the lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake values achieved in the light by the two types of tissue are similar but in the dark there is a restricted uptake by the whole infiltrated laminae”
t0“Wheat”
Claim · model-written summary
In the dark, chloride uptake by whole infiltrated laminae was restricted.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- whole infiltrated laminaee0
- Outcome
- restricted uptakee0
- Setting
- in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake values achieved in the light by the two types of tissue are similar but in the dark there is a restricted uptake by the whole infiltrated laminae”
t0“Wheat”
Claim · model-written summary
The authors consider that the slower dark uptake by whole laminae relative to chopped tissue is due to cuticular resistance to solute penetration.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- slower uptake by whole laminae relative to chopped tissue in the darke0
- Qualifier
- cuticular resistance to solute penetratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the slower uptake by whole laminae relative to chopped tissue in the dark is due to cuticular resistance to solute penetration”
t0“Wheat”
Claim · model-written summary
The authors consider that in the light the impediment to uptake is overcome by stomatal opening.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- impedimente0
- Qualifier
- stomatal openinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the light the impediment is overcome by stomatal opening”
t0“Wheat”
Claim · model-written summary
A light-enhanced chloride uptake unrelated to stomatal opening was discernible in both tissues.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- both tissuese0
- Outcome
- light-enhanced uptake unrelated to stomatal openinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A light-enhanced uptake unrelated to stomatal opening is discernible in both tissues”
t0“Wheat”
Claim · model-written summary
The energetic basis of the light-enhanced uptake has not been defined but may be related to substrate exhaustion.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- energetic basise0
- Qualifier
- substrate exhaustione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its energetic basis has not been defined but may be related to substrate exhaustion”
t0“Wheat”
Claim · model-written summary
The chloride absorption mechanism was not impaired by vacuum infiltration.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- vacuum infiltratione0
- Outcome
- absorption mechanisme0
- Direction
- not impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absorption mechanism is not impaired by vacuum infiltration”
t0“Wheat”
The same questions in other papers
light · nutrient: content · Triticum aestivum (wheat)Positive and negative results
9 papers in the same direction as this paper · 6 in the opposite direction
- positive
- negative
- negative
12 papers more in this group
See all 16 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.