Abstract
The whole-plant daily carbon balance (the 24-h sum of photosynthetic input of substrate carbon per plant and loss of carbon through respiration) is the CO2 exchange measure that relates most closely to crop production rates. Water stress reduces the photosynthetic input, reducing both leaf area and photosynthetic rate per unit leaf area. Respiratory losses are reduced more or less proportionately. A less-than-proportional loss was observed during osmotic adjustment in sorghum (Sorghum bicolor (L) Moench): the metabolic cost of storing photosynthate and using it for osmotic adjustment was less than the cost of converting it to new biomass. A slightly increased metabolic cost is often found under salt stress but, in sorghum plants that were salinized and then water stressed, the adverse effects of salt were mitigated by decreased water loss rates and enhanced osmotic adjustment during water stress. More tests involving combined salt and water stress are needed.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
During sorghum osmotic adjustment, storing photosynthate cost less metabolically than conversion to new biomass.
- Outcome
- metabolic cost of storing photosynthate and using it for osmotic adjustmente0
- Direction
- less thane0
- Comparator
- cost of converting it to new biomasse0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A less-than-proportional loss was observed during osmotic adjustment in sorghum (Sorghum bicolor (L) Moench): the metabolic cost of storing photosynthate and using it for osmotic adjustment was less than the cost of converting it to new biomass.”
Claim · model-written summary
Sorghum exposed to salt and then water stress had reduced water loss rates.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in sorghum plants that were salinized and then water stressed, the adverse effects of salt were mitigated by decreased water loss rates and enhanced osmotic adjustment during water stress.”
Claim · model-written summary
Sorghum exposed to salt and then water stress had enhanced osmotic adjustment.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in sorghum plants that were salinized and then water stressed, the adverse effects of salt were mitigated by decreased water loss rates and enhanced osmotic adjustment during water stress.”
Claim · model-written summary
The authors call for more tests of combined salt and water stress.
Verbatim
e0“More tests involving combined salt and water stress are needed.”
t0“Whole-Plant”
The same questions in other papers
drought · physiology: water · SorghumResults differ
8 papers in the same direction as this paper · 16 in the opposite direction
- negative
- negative
- no effect
21 papers more in this group
See all 25 papers →salinity · physiology: water · SorghumPositive and negative results
4 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
5 papers more in this group
See all 9 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.