Abstract
Abstract Crop salt tolerance is not absolute but depends on environmental factors such as relative humidity (RH), as well as management of irrigation and fertility. The objective of this study was to evaluate the influence of atmospheric relative humidity on plant growth and how it interacts with salinity to influence salt tolerance and water relations of barley ( Hordeum vulgaris L. ‘CM‐67’), wheat ( Triticum aestivum L. ‘Siete Cerros’), and sweet corn ( Zea mays L. ‘Bonanza’). The studies were conducted in sunlit climate chambers with temperatures cycled daily between 10 and 27 C for barley and wheat and between 17 and 32 C for corn and with average daytime RH controlled near 45% for the low and near 90% for the high RH treatments. The root medium of each crop was maintained at four different osmotic potentials ( s Ψ o ), the range depending on the crop's salt tolerance. With a nonsaline root medium, increasing the RH from 45 to 90%, increased the wheat yield by 24%, had no influence on corn yield, and reduced barley yield by 16%. High RH increased the salt tolerance of barley and corn but did not affect the tolerance of wheat. For all three crops at all s Ψ o levels, water‐use efficiency (yield per unit of water consumed) was higher at 90% than at 45% RH. Linear relationships were found between leaf total water ( L Ψ t ) and osmotic ( L Ψ o ) potentials and s Ψ o for barley and wheat. Leaf pressure potential ( L Ψ p ) was reduced by low RH and salinity. The relationship between crop yield and L Ψ t was linear. The difference between full yield and almost no yield was 2.0 megaPascals for both barley and wheat. RH must be considered when evaluating the salt tolerance of barley and corn but not for wheat.
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Claims 14
Claim · model-written summary
In a nonsaline medium, raising RH from 45 to 90% increased wheat yield by 24%.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- increasing the RH from 45 to 90%e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 24%e0
- Setting
- nonsaline root mediume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With a nonsaline root medium, increasing the RH from 45 to 90%, increased the wheat yield by 24%”
Claim · model-written summary
In a nonsaline medium, raising RH from 45 to 90% had no influence on corn yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- increasing the RH from 45 to 90%e0
- Outcome
- yielde0
- Direction
- had no influencee0
- Setting
- nonsaline root mediume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With a nonsaline root medium, increasing the RH from 45 to 90%, increased the wheat yield by 24%, had no influence on corn yield”
Claim · model-written summary
In a nonsaline medium, raising RH from 45 to 90% reduced barley yield by 16%.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- increasing the RH from 45 to 90%e0
- Outcome
- yielde0
- Direction
- reducede0
- Value
- 16%e0
- Setting
- nonsaline root mediume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“With a nonsaline root medium, increasing the RH from 45 to 90%, increased the wheat yield by 24%, had no influence on corn yield, and reduced barley yield by 16%”
Claim · model-written summary
High RH increased the salt tolerance of barley.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- High RHe0
- Outcome
- salt tolerancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High RH increased the salt tolerance of barley and corn but did not affect the tolerance of wheat”
Claim · model-written summary
High RH increased the salt tolerance of corn.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- High RHe0
- Outcome
- salt tolerancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High RH increased the salt tolerance of barley and corn but did not affect the tolerance of wheat”
Claim · model-written summary
High RH did not affect the salt tolerance of wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- High RHe0
- Outcome
- tolerancee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High RH increased the salt tolerance of barley and corn but did not affect the tolerance of wheat”
Claim · model-written summary
For all three crops at all osmotic potential levels, water-use efficiency was higher at 90% than at 45% RH.
Verbatim
e0“For all three crops at all s Ψ o levels, water‐use efficiency (yield per unit of water consumed) was higher at 90% than at 45% RH”
Claim · model-written summary
Barley leaf total water and osmotic potentials were linearly related to root medium osmotic potential.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- s Ψ oe0
- Outcome
- leaf total water ( L Ψ t ) and osmotic ( L Ψ o ) potentialse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Linear relationships were found between leaf total water ( L Ψ t ) and osmotic ( L Ψ o ) potentials and s Ψ o for barley and wheat”
Claim · model-written summary
Wheat leaf total water and osmotic potentials were linearly related to root medium osmotic potential.
- Taxon
- wheatTriticum aestivume0
- Treatment
- s Ψ oe0
- Outcome
- leaf total water ( L Ψ t ) and osmotic ( L Ψ o ) potentialse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Linear relationships were found between leaf total water ( L Ψ t ) and osmotic ( L Ψ o ) potentials and s Ψ o for barley and wheat”
Claim · model-written summary
Leaf pressure potential was reduced by low RH and salinity.
Not reportedTaxonComparator
Verbatim
e0“Leaf pressure potential ( L Ψ p ) was reduced by low RH and salinity”
Claim · model-written summary
The relationship between crop yield and leaf total water potential was linear.
Not reportedTaxon
Verbatim
e0“The relationship between crop yield and L Ψ t was linear”
Claim · model-written summary
The difference between full yield and almost no yield was 2.0 megaPascals for barley.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- difference between full yield and almost no yielde0
- Value
- 2.0 megaPascalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference between full yield and almost no yield was 2.0 megaPascals for both barley and wheat”
Claim · model-written summary
The difference between full yield and almost no yield was 2.0 megaPascals for wheat.
- Taxon
- wheatTriticum aestivume0
- Outcome
- difference between full yield and almost no yielde0
- Value
- 2.0 megaPascalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference between full yield and almost no yield was 2.0 megaPascals for both barley and wheat”
Claim · model-written summary
The authors recommend considering RH when evaluating salt tolerance of barley and corn but not wheat.
- Taxon
- barley and cornHordeum vulgareZea mays subsp. mayse0
- Outcome
- salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RH must be considered when evaluating the salt tolerance of barley and corn but not for wheat”
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See all 11 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.