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Complex relationship between growth and circumnutations inHelianthus annuusstem 3

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Under light, the magnitude of circumnutation subsequently decreased.

Taxon: Helianthus annuusHelianthus annuuse0
Treatment: under lighte1
Outcome: magnitudee1
Direction: decreasee1

Not reportedComparator

Verbatim

e0
“three-week old Helianthus annuus in the 16:8 h light:dark photoperiod”
✓ located verbatim in the source · abstract, characters 45–114

e1
“Additionally, under light, there occurred a subsequent decrease in the magnitude, disturbance of circumnutation trajectory and, in some cases, changes in the direction of rotation”
✓ located verbatim in the source · abstract, characters 1053–1232

Title

Complex relationship between growth and circumnutations inHelianthus annuusstem

Maria Stolarz; Elzbieta Krol; Halina Dziubinska; et al. Plant Signaling & Behavior 2008. doi:10.4161/psb.3.6.5714

Other claims from this paper (12)

Intervention effect Circumnutation of sunflower stems was weak in the light stage compared with the dark stage, where it reached a high level.
Intervention effect In the light stage, growth rate reached the same high level as in the dark stage.
Intervention effect In the light stage, stem circumnutation was downregulated more strongly than growth.
Intervention effect Switching off the light increased growth and circumnutation rate.
Intervention effect Switching the light on caused an immediate transient decrease in growth rate.
Intervention effect Switching the light on resulted in stem contraction.
Intervention effect Switching the light on was accompanied by an almost complete pause of circumnutation.
Intervention effect Under light, circumnutation trajectory was disturbed.
Intervention effect Under light, the direction of rotation changed in some cases.
Mechanism Stem contraction and disturbance of circumnutation imply turgor changes in the sunflower stem.
Association Disturbances of growth rate are accompanied by changes in circumnutation parameters.
Association There is no simple quantitative relation between growth rate and circumnutation rate.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Under light, circumnutation trajectory was disturbed.

Taxon: Helianthus annuusHelianthus annuuse0
Treatment: under lighte1
Outcome: disturbance of circumnutation trajectorye1

Not reportedComparatorDirection

Verbatim

e0
“three-week old Helianthus annuus in the 16:8 h light:dark photoperiod”
✓ located verbatim in the source · abstract, characters 45–114

e1
“Additionally, under light, there occurred a subsequent decrease in the magnitude, disturbance of circumnutation trajectory and, in some cases, changes in the direction of rotation”
✓ located verbatim in the source · abstract, characters 1053–1232

Title

Complex relationship between growth and circumnutations inHelianthus annuusstem

Maria Stolarz; Elzbieta Krol; Halina Dziubinska; et al. Plant Signaling & Behavior 2008. doi:10.4161/psb.3.6.5714

Other claims from this paper (12)

Intervention effect Circumnutation of sunflower stems was weak in the light stage compared with the dark stage, where it reached a high level.
Intervention effect In the light stage, growth rate reached the same high level as in the dark stage.
Intervention effect In the light stage, stem circumnutation was downregulated more strongly than growth.
Intervention effect Switching off the light increased growth and circumnutation rate.
Intervention effect Switching the light on caused an immediate transient decrease in growth rate.
Intervention effect Switching the light on resulted in stem contraction.
Intervention effect Switching the light on was accompanied by an almost complete pause of circumnutation.
Intervention effect Under light, the magnitude of circumnutation subsequently decreased.
Intervention effect Under light, the direction of rotation changed in some cases.
Mechanism Stem contraction and disturbance of circumnutation imply turgor changes in the sunflower stem.
Association Disturbances of growth rate are accompanied by changes in circumnutation parameters.
Association There is no simple quantitative relation between growth rate and circumnutation rate.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Under light, the direction of rotation changed in some cases.

Taxon: Helianthus annuusHelianthus annuuse0
Treatment: under lighte1
Outcome: changes in the direction of rotatione1
Qualifier: in some casese1

Not reportedComparatorDirection

Verbatim

e0
“three-week old Helianthus annuus in the 16:8 h light:dark photoperiod”
✓ located verbatim in the source · abstract, characters 45–114

e1
“Additionally, under light, there occurred a subsequent decrease in the magnitude, disturbance of circumnutation trajectory and, in some cases, changes in the direction of rotation”
✓ located verbatim in the source · abstract, characters 1053–1232

Title

Complex relationship between growth and circumnutations inHelianthus annuusstem

Maria Stolarz; Elzbieta Krol; Halina Dziubinska; et al. Plant Signaling & Behavior 2008. doi:10.4161/psb.3.6.5714

Other claims from this paper (12)

Intervention effect Circumnutation of sunflower stems was weak in the light stage compared with the dark stage, where it reached a high level.
Intervention effect In the light stage, growth rate reached the same high level as in the dark stage.
Intervention effect In the light stage, stem circumnutation was downregulated more strongly than growth.
Intervention effect Switching off the light increased growth and circumnutation rate.
Intervention effect Switching the light on caused an immediate transient decrease in growth rate.
Intervention effect Switching the light on resulted in stem contraction.
Intervention effect Switching the light on was accompanied by an almost complete pause of circumnutation.
Intervention effect Under light, the magnitude of circumnutation subsequently decreased.
Intervention effect Under light, circumnutation trajectory was disturbed.
Mechanism Stem contraction and disturbance of circumnutation imply turgor changes in the sunflower stem.
Association Disturbances of growth rate are accompanied by changes in circumnutation parameters.
Association There is no simple quantitative relation between growth rate and circumnutation rate.

Action potentials and variation potentials in sunflower: An analysis of their relationships and distinguishing characteristics 2

Show all 2 →

Observationobservedoriginal resultmeasured

Claim · model-written summary

Action potentials appeared to propagate without decrement in velocity or magnitude.

Taxon: sunflowerHelianthus annuust0
Outcome: velocity or magnitudee0
Direction: without decremente0

Verbatim

e0
“The AP appears to propagate without decrement in velocity or magnitude, whereas the VP parameters decrease significantly with distance.”
✓ located verbatim in the source · abstract, characters 566–701

t0
“sunflower”
✓ located verbatim in the source · title, characters 46–55

Title

Action potentials and variation potentials in sunflower: An analysis of their relationships and distinguishing characteristics

Bratislav Stanković; Daniel L. Witters; Tadeusz Zawadzki; et al. Physiologia Plantarum 1998. doi:10.1034/j.1399-3054.1998.1030107.x

Other claims from this paper (12)

Observationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Variation potential parameters decreased significantly with distance.

Taxon: sunflowerHelianthus annuust0
Outcome: VP parameterse0
Direction: decreasee0

Verbatim

e0
“The AP appears to propagate without decrement in velocity or magnitude, whereas the VP parameters decrease significantly with distance.”
✓ located verbatim in the source · abstract, characters 566–701

t0
“sunflower”
✓ located verbatim in the source · title, characters 46–55

Title

Action potentials and variation potentials in sunflower: An analysis of their relationships and distinguishing characteristics

Bratislav Stanković; Daniel L. Witters; Tadeusz Zawadzki; et al. Physiologia Plantarum 1998. doi:10.1034/j.1399-3054.1998.1030107.x

Other claims from this paper (12)

Dynamic changes in root hydraulic properties in response to nitrate availability 2

Show all 2 →

Associationobservedoriginal resultmeasured

Claim · model-written summary

The magnitude of the nitrate effect on root hydraulic resistance depended on nitrate concentration.

Taxon: Helianthus annuusHelianthus annuuse0
Treatment: nitrate concentratione1
Outcome: magnitude of the effecte1
Direction: dependente1

Verbatim

e0
“Sunflower (Helianthus annuus cv. Holiday) plants grown hydroponically with limited nitrate availability”
✓ located verbatim in the source · abstract, characters 202–305

e1
“The response was rapid, with a 20% decrease in hydraulic resistance occurring within the first hour after the addition of 5 mM nitrate and the magnitude of the effect was dependent on nitrate concentration”
✓ located verbatim in the source · abstract, characters 632–837

Title

Dynamic changes in root hydraulic properties in response to nitrate availability

V. Gloser; M. A. Zwieniecki; C. M. Orians; et al. Journal of Experimental Botany 2007. doi:10.1093/jxb/erm118

Other claims from this paper (6)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding 5 mM nitrate decreased root hydraulic resistance by 20% within the first hour.

Taxon: Helianthus annuusHelianthus annuuse0
Treatment: addition of 5 mM nitratee1
Outcome: hydraulic resistancee1
Direction: decreasee1
Value: 20%e1
Qualifier: within the first houre1

Not reportedComparator

Verbatim

e0
“Sunflower (Helianthus annuus cv. Holiday) plants grown hydroponically with limited nitrate availability”
✓ located verbatim in the source · abstract, characters 202–305

e1
“The response was rapid, with a 20% decrease in hydraulic resistance occurring within the first hour after the addition of 5 mM nitrate and the magnitude of the effect was dependent on nitrate concentration”
✓ located verbatim in the source · abstract, characters 632–837

Title

Dynamic changes in root hydraulic properties in response to nitrate availability

V. Gloser; M. A. Zwieniecki; C. M. Orians; et al. Journal of Experimental Botany 2007. doi:10.1093/jxb/erm118

Other claims from this paper (6)

The Relative Magnitude of the Partial Resistances to Transpirational Water Movement in Sunflower (Helianthus annuusL.) 2

Show all 2 →

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

A rapid reduction of relative humidity to 60% induced a transient decrease in water potential (Ψ) of approximately 4.5 × 10^5 Pa in sunflower.

Taxon: sunflowerHelianthus annuuse1
Treatment: rapid reduction of relative humidity from 100% to 60 or 40%e7
Outcome: Ψe7
Direction: decreasese7
Value: approximately 4.5e7

Not reportedComparator

Verbatim

e1
“using hydroponic sunflower plants”
✓ located verbatim in the source · abstract, characters 108–141

e7
“Abrupt increases in evaporative demand, obtained by rapid reduction of relative humidity from 100% to 60 or 40%, induced transient decreases in Ψ of approximately 4.5 and 2.5 × 105 Pa, respectively, which were accompanied by simultaneous large increases in stomatal resistance”
✓ located verbatim in the source · abstract, characters 931–1207

Title

The Relative Magnitude of the Partial Resistances to Transpirational Water Movement in Sunflower (Helianthus annuusL.)

C. R. BLACK Journal of Experimental Botany 1979. doi:10.1093/jxb/30.2.245

Other claims from this paper (12)

Intervention effect Cooling the root system to 10 °C or below decreased leaf water potential by up to 7 × 10^5 Pa in hydroponic sunflower.
Intervention effect Leaf water potential completely recovered after root cooling to 10 °C or below once freezing was avoided.
Intervention effect Cooling stem or petiolar segments did not affect leaf water status unless freezing occurred.
Intervention effect Freezing during stem or petiolar cooling caused severe irreversible water stress above the cooled zone.
Intervention effect Leaves below the cooled zone were unaffected by stem or petiolar cooling.
Intervention effect A rapid reduction of relative humidity to 40% induced a transient decrease in water potential (Ψ) of 2.5 × 10^5 Pa in sunflower.
Intervention effect The rapid humidity reduction was accompanied by large simultaneous increases in stomatal resistance in sunflower.
Intervention effect No simultaneous transient effects were observed in the stem xylem during the rapid humidity reduction.
Observation Petiolar resistance was low in sunflower petioles, about 0.04 Pa s cm−4.
Observation Immature and senescent sunflower petioles had petiolar resistance up to 10 times larger than other petioles.
Mechanism The petiolar resistance trend is attributed to the developmental stage and condition of the xylem.
Mechanism The factor causing the transient foliar stress is located within the lamina, not in the stem xylem.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

A rapid reduction of relative humidity to 40% induced a transient decrease in water potential (Ψ) of 2.5 × 10^5 Pa in sunflower.

Taxon: sunflowerHelianthus annuuse1
Treatment: rapid reduction of relative humidity from 100% to 60 or 40%e7
Outcome: Ψe7
Direction: decreasese7
Value: 2.5 × 105 Pae7

Not reportedComparator

Verbatim

e1
“using hydroponic sunflower plants”
✓ located verbatim in the source · abstract, characters 108–141

e7
“Abrupt increases in evaporative demand, obtained by rapid reduction of relative humidity from 100% to 60 or 40%, induced transient decreases in Ψ of approximately 4.5 and 2.5 × 105 Pa, respectively, which were accompanied by simultaneous large increases in stomatal resistance”
✓ located verbatim in the source · abstract, characters 931–1207

Title

The Relative Magnitude of the Partial Resistances to Transpirational Water Movement in Sunflower (Helianthus annuusL.)

C. R. BLACK Journal of Experimental Botany 1979. doi:10.1093/jxb/30.2.245

Other claims from this paper (12)

“magnitude of decrease”

Claim types

Direction of the findings

Over time

Claim type

Research area

Polarity

Statistics

Complex relationship between growth and circumnutations inHelianthus annuusstem 3

Action potentials and variation potentials in sunflower: An analysis of their relationships and distinguishing characteristics 2

Dynamic changes in root hydraulic properties in response to nitrate availability 2

The Relative Magnitude of the Partial Resistances to Transpirational Water Movement in Sunflower (Helianthus annuusL.) 2