Abstract
Tall wheatgrass [Elytrigia pontica (Podp.) Holub Syn: Agropyron elongatum (Host) Beauv. ’Jose’] and basin wildrye [Leymus cinereus (Scribn. & Merr.) A. Love Syn: Elymus cinereus Scribn. and Merr. ’Magnar’] may have potential for increasing forage production once established on saline rangelands. The shoot and root elongation, osmotic adjustment, leaf water stress, and turgor at growth cessation of these grasses in response to drought and salinity were compared in a growth chamber experiment. Seedlings were grown in columns of soil initially saturated with solutions with an electrical conductivity of 1.0, 10, and 20 dS∙m −1 and allowed to grow until desiccated. The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities corresponds with the higher survival of tall wheatgrass than basin wildrye on a saline soil and on a nonsaline soil in central Nevada. As leaf water potential decreased, both species had similar or higher turgor maintenance in saline than nonsaline soil. But salinity decreased growth of both species, even when no water stress was apparent, and plant and soil water potentials in the saline and nonsaline columns were similar. This suggests that salt toxicity or nutritional imbalances due to accumulated ions, rather than water stress, depressed growth. Plant materials for revegetating saline, arid rangelands should be screened not only for seedling vigor and ability to tolerate or avoid water stress but also for tolerance to salinity.Key words: Drought, osmotic adjustment, turgor, ion toxicity, salt tolerance
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Claims 9
Claim · model-written summary
Tall wheatgrass showed greater shoot elongation and root penetration than basin wildrye at all soil salinities.
- Taxon
- tall wheatgrass
Thinopyrum elongatume1 - Treatment
- soil salinitiese1
- Outcome
- shoot elongation and root penetratione1
- Direction
- greatere1
- Comparator
- basin wildryee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities”
Claim · model-written summary
Tall wheatgrass had higher survival than basin wildrye on saline and nonsaline soil in central Nevada.
- Taxon
- tall wheatgrassThinopyrum elongatume2
- Outcome
- survivale2
- Direction
- highere2
- Qualifier
- on a saline soil and on a nonsaline soile2
- Comparator
- basin wildryee2
- Setting
- central Nevadae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the higher survival of tall wheatgrass than basin wildrye on a saline soil and on a nonsaline soil in central Nevada”
Claim · model-written summary
Tall wheatgrass turgor maintenance was similar or higher in saline than nonsaline soil as leaf water potential decreased.
- Taxon
- tall wheatgrassThinopyrum elongatume1
- Treatment
- salinee3
- Outcome
- turgor maintenancee3
- Direction
- similar or highere3
- Qualifier
- As leaf water potential decreasede3
- Comparator
- nonsaline soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities”
e3“As leaf water potential decreased, both species had similar or higher turgor maintenance in saline than nonsaline soil”
Claim · model-written summary
Basin wildrye turgor maintenance was similar or higher in saline than nonsaline soil as leaf water potential decreased.
Verbatim
e1“The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities”
e3“As leaf water potential decreased, both species had similar or higher turgor maintenance in saline than nonsaline soil”
Claim · model-written summary
Salinity decreased growth of tall wheatgrass even when no water stress was apparent.
- Taxon
- tall wheatgrassThinopyrum elongatume1
- Treatment
- salinitye4
- Outcome
- growthe4
- Direction
- decreasede4
- Qualifier
- even when no water stress was apparente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities”
e4“But salinity decreased growth of both species, even when no water stress was apparent”
Claim · model-written summary
Salinity decreased growth of basin wildrye even when no water stress was apparent.
- Taxon
- basin wildryee1
- Treatment
- salinitye4
- Outcome
- growthe4
- Direction
- decreasede4
- Qualifier
- even when no water stress was apparente4
Not reportedComparator
Verbatim
e1“The greater shoot elongation and root penetration of tall wheatgrass than basin wildrye at all soil salinities”
e4“But salinity decreased growth of both species, even when no water stress was apparent”
Claim · model-written summary
Plant and soil water potentials were similar in saline and nonsaline columns.
Not reportedTaxon
Verbatim
e5“plant and soil water potentials in the saline and nonsaline columns were similar”
Claim · model-written summary
Salt toxicity or nutritional imbalance from accumulated ions, rather than water stress, depressed growth.
Not reportedTaxon
Verbatim
e6“This suggests that salt toxicity or nutritional imbalances due to accumulated ions, rather than water stress, depressed growth”
Claim · model-written summary
Plant materials for revegetating saline rangelands should be screened for salinity tolerance.
- Outcome
- tolerance to salinitye7
Not reportedTaxon
Verbatim
e7“Plant materials for revegetating saline, arid rangelands should be screened not only for seedling vigor and ability to tolerate or avoid water stress but also for tolerance to salinity”
The same questions in other papers
salinity · growth · Thinopyrum elongatum (tall wheatgrass)Positive and negative results
2 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
6 papers more in this group
See all 10 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.