Abstract
Abstract Etiolated 6‐day‐old wheat ( Triticum aestivum L. cv. Chris) seedlings were subjected to osmotic stress by an application of polyethylene glycol 12 h prior to the exposure to a continuous 72‐h light period. The water potential of the primary leaf of stressed seedlings was between –9 and –14 bars throughout the light period. Stress impaired seedling growth, leaf unfolding, and the increase in leaf area. The imposed osmotic stress reduced total chlorophyll accumulation, particularly after 9 h light, suggesting that this is the approximate time period for the depletion of the protochlorophyll(ide) pool and the pool of an essential protochlorophyll(ide) precursor. The chlorophyll a/b ratio of extracts from stressed and non‐stressed plants was the same during the 72‐h greening period. Water deficit stress impaired carotenoid accumulation sooner than the impairment of chlorophyll production suggesting either a smaller carotenoid pool size of precursors or that the metabolic pathway of carotenoid synthesis was more sensitive to stress. Shifts from the usual plastid pigment absorbance maxima were not observed in these studies.
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Claims 7
Claim · model-written summary
Stressed seedling primary leaves had water potential between –9 and –14 bars.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- primary leafe0
- Outcome
- water potentiale0
- Value
- –9 and –14 barse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water potential of the primary leaf of stressed seedlings was between –9 and –14 bars throughout the light period”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Stress impaired wheat seedling growth and leaf unfolding.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Stresse0
- Outcome
- seedling growth, leaf unfoldinge0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stress impaired seedling growth, leaf unfolding, and the increase in leaf area”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Stress impaired the increase in wheat leaf area.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Stresse0
- Outcome
- increase in leaf areae0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stress impaired seedling growth, leaf unfolding, and the increase in leaf area”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Osmotic stress reduced total chlorophyll accumulation, especially after 9 hours of light.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- imposed osmotic stresse0
- Outcome
- total chlorophyll accumulatione0
- Direction
- reducede0
- Qualifier
- after 9 h lighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The imposed osmotic stress reduced total chlorophyll accumulation, particularly after 9 h light”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Chlorophyll a/b ratios were the same in stressed and non‐stressed plants.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- stressede0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- the samee0
- Comparator
- non‐stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chlorophyll a/b ratio of extracts from stressed and non‐stressed plants was the same during the 72‐h greening period”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Water deficit impaired carotenoid accumulation sooner than chlorophyll production.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Water deficit stresse0
- Outcome
- carotenoid accumulatione0
- Direction
- impairede0
- Qualifier
- soonere0
- Comparator
- chlorophyll productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit stress impaired carotenoid accumulation sooner than the impairment of chlorophyll production”
t0“Wheat Seedling Growth and Plastid Pigment Development”
Claim · model-written summary
Plastid pigment absorbance maxima showed no shifts.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Shifts from the usual plastid pigment absorbance maximae0
- Direction
- not observede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shifts from the usual plastid pigment absorbance maxima were not observed in these studies”
t0“Wheat Seedling Growth and Plastid Pigment Development”
The same questions in other papers
drought · physiology: pigments · Triticum aestivum (wheat)Positive and negative results
114 papers in the same direction as this paper · 16 in the opposite direction
- negative
- negative
- negative
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See all 131 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.