Hilaria rigida 54 claims

species · family Poaceae · green plant · NCBI Taxonomy ↗

Also written in claims: P. rigida · Pleuraphis rigida — NCBI synonyms: Pleuraphis rigida

9 spellings

Questions studied on this organism1 question3 papers

Hilaria rigidaMatt Lavin · CC BY-SA 2.0 · Wikimedia Commons ↗

54 claims

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Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Hilaria rigida showed the highest ground cover and growth uniformity.

Taxon: Hilaria rigidaHilaria rigidae0
Outcome: ground surface coverage and uniformity in growthe0
Direction: higheste0

Verbatim

e0
“Lippia nodiflora , Hilaria rigida , and Bouteloua gracilis exhibited the highest ground surface coverage and uniformity in growth.”
✓ located verbatim in the source · abstract, characters 1205–1335

Title

Versatile Native Grasses and a Turf-Alternative Groundcover for the Arid Southwest United States1

Worku Burayu; Kai Umeda Journal of Environmental Horticulture 2021. doi:10.24266/0738-2898-39.4.160

Other claims from this paper (10)

Observation Eragrostis tef had 86% laboratory germination.
Observation Eragrostis intermedia had 85% laboratory germination.
Observation Ten species averaged 81% emergence at Scottsdale within eight weeks.
Observation Nine species showed 58% emergence at Sun City West.
Observation Sporobolus cryptandrus exceeded 76 cm in height.
Observation Lippia nodiflora grew to about 5 cm in height.
Observation Five named species remained green year-round under twice-yearly mowing.
Observation Lippia nodiflora showed the highest ground cover and growth uniformity.
Observation Bouteloua gracilis showed the highest ground cover and growth uniformity.
Recommendation Tested kurapia and native grasses showed potential for low-input desert landscaping.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.

Taxon: Hilaria rigidaHilaria rigidae0
Outcome: seasonal stomatal activitye0
Qualifier: Availability of soil watere0
Setting: Colorado desert section of the Sonoran deserte0

Not reportedDirection

Verbatim

e0
“Availability of soil water was the major influence on seasonal stomatal activity of Hilaria rigida (Thurb.) Benth. ex Scribn. over a 2-yr study period in the Colorado desert section of the Sonoran desert”
✓ located verbatim in the source · abstract, characters 0–203

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Major stomatal opening occurred for 4.6 months in cool winter and spring.

Taxon: Hilaria rigidaHilaria rigidae1
Outcome: Major stomatal openinge0
Value: 4.6 moe0
Qualifier: relatively cool winter-springe0

Verbatim

e0
“Major stomatal opening (water vapor conductance >2 mm/s) occurred for 4.6 mo in the relatively cool winter-spring”
✓ located verbatim in the source · abstract, characters 205–318

e1
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Major stomatal opening occurred for 1.7 months in late summer and early fall.

Taxon: Hilaria rigidaHilaria rigidae2
Outcome: Major stomatal openinge1
Value: 1.7 moe0
Qualifier: late summer-early falle0

Verbatim

e0
“for 1.7 mo in the late summer-early fall”
✓ located verbatim in the source · abstract, characters 369–409

e1
“Major stomatal opening (water vapor conductance >2 mm/s)”
✓ located verbatim in the source · abstract, characters 205–261

e2
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The temperature optimum for CO2 uptake was generally above daytime temperatures.

Taxon: Hilaria rigidaHilaria rigidae1
Outcome: temperature optimum for CO2 uptakee0
Direction: abovee0
Qualifier: particularly in the wintere0
Comparator: daytime temperaturese0

Verbatim

e0
“The temperature optimum for CO2 uptake was generally above daytime temperatures, particularly in the winter”
✓ located verbatim in the source · abstract, characters 457–564

e1
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.

Taxon: Hilaria rigidaHilaria rigidae1
Treatment: daytime growth temperature was raised from 16? to 490Ce0
Outcome: temperature optimum for CO2 uptakee0
Direction: shifted from 290 to 430Ce0
Value: 290 to 430Ce0
Comparator: 16?e0
Setting: laboratory experimentse0

Verbatim

e0
“When the daytime growth temperature was raised from 16? to 490C in laboratory experiments, the temperature optimum for CO2 uptake shifted from 290 to 430C”
✓ located verbatim in the source · abstract, characters 566–720

e1
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

H. rigida had Kranz anatomy.

Taxon: H. rigidaHilaria rigidae0
Outcome: Kranz anatomye0

Verbatim

e0
“H. rigida displayed other typical C4 characteristics including Kranz anatomy”
✓ located verbatim in the source · abstract, characters 782–858

e1
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

H. rigida had a low CO2 compensation point of 12 dlI1.

Taxon: H. rigidaHilaria rigidae1
Outcome: CO2 compensation pointe0
Direction: lowe0
Value: 12 dlI1e0

Verbatim

e0
“a low CO2 compensation point (12 dlI1)”
✓ located verbatim in the source · abstract, characters 860–898

e1
“H. rigida displayed other typical C4 characteristics”
✓ located verbatim in the source · abstract, characters 782–834

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultmeasured

Claim · model-written summary

H. rigida CO2 uptake did not saturate in full sunlight.

Taxon: H. rigidaHilaria rigidae1
Outcome: lack of light saturation of CO2 uptakee0
Qualifier: at full sunlighte0

Verbatim

e0
“a lack of light saturation of CO2 uptake at full sunlight”
✓ located verbatim in the source · abstract, characters 904–961

e1
“H. rigida displayed other typical C4 characteristics”
✓ located verbatim in the source · abstract, characters 782–834

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.
Observation The grass had high water use efficiency accompanying high carbon uptake.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Under optimal field conditions, CO2 uptake reached 67 /Imol * m-2 s-I, above other reported species.

Taxon: Hilaria rigidaHilaria rigidae1
Outcome: CO2 uptake ratee0
Direction: highere0
Value: 67 /Imol * m-2 s-Ie0
Comparator: any other speciese0
Setting: field conditionse0

Verbatim

e0
“Under optimal field conditions, the CO2 uptake rate can be 67 /Imol * m-2 s-I (106 mg CO2 dm-2 * h-1), higher than has been reported for any other species”
✓ located verbatim in the source · abstract, characters 963–1117

e1
“Hilaria rigida (Thurb.) Benth. ex Scribn.”
✓ located verbatim in the source · abstract, characters 84–125

Title

WATER VAPOR CONDUCTANCE AND C02 UPTAKE FOR LEAVES OF A C4 DESERT GRASS

Park S. Nobel 2016

Other claims from this paper (9)

Association Soil water availability was the main influence on seasonal stomatal activity of Hilaria rigida.
Observation Major stomatal opening occurred for 4.6 months in cool winter and spring.
Observation Major stomatal opening occurred for 1.7 months in late summer and early fall.
Observation The temperature optimum for CO2 uptake was generally above daytime temperatures.
Intervention effect Raising growth temperature shifted the CO2 uptake optimum from 290 to 430C.
Observation H. rigida had Kranz anatomy.
Observation H. rigida had a low CO2 compensation point of 12 dlI1.
Observation H. rigida CO2 uptake did not saturate in full sunlight.
Observation The grass had high water use efficiency accompanying high carbon uptake.