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“chlorophyll content (SPAD)”

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Method / resourceauthor interpretationoriginal resultmeasured

Claim · model-written summary

The SPAD-502 meter could rapidly determine crop leaf chlorophyll content.

Taxon: crope0
Outcome: Chlorophyll contente0
Comparator: SPAD-502 chlorophyll metere0

Not reportedValue

Verbatim

e0
“Chlorophyll content of crop leaves would be determined quickly using SPAD-502 chlorophyll meter.”
✓ located verbatim in the source · abstract, characters 221–317

Title

Relationship between Chlorophyll Meter Readings(SPAD Readings) and Chlorophyll Content of Crop Leaves

Ai Tian Hubei Nongxueyuan xuebao 2000

Other claims from this paper (1)

Association SPAD readings correlated well with leaf chlorophyll content in rice, cotton, corn, sorghum and soybean.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Tolerant lines maintained higher chlorophyll content, SPAD value and chlorophyll stability index under drought.

Taxon: maizeZea mayst0
Outcome: chlorophyll content, SPAD value, chlorophyll stability indexe0
Direction: highere0

Verbatim

e0
“Tolerant inbred lines maintained higher chlorophyll content, SPAD value, chlorophyll stability index”
✓ located verbatim in the source · abstract, characters 516–616

t0
“maize”
✓ located verbatim in the source · title, characters 34–39

Title

Physiological characterization of maize inbred lines under moisture deficit condition

Bibhu P. Singh; D. Lenka; Devraj Lenka; et al. Journal of Pharmacognosy and Phytochemistry 2020

Other claims from this paper (6)

Observation Nine named inbred lines showed higher drought tolerance.
Observation Tolerant lines maintained higher cell membrane stability and relative water content under drought.
Observation Tolerant lines maintained comparatively higher grain yield under drought.
Observation Tolerant lines had lower leaf senescence and rolling.
Observation CML-161 and CML-300 were most sensitive to moisture deficit.
Observation CML-161 and CML-300 had the lowest grain yields under moisture deficit.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Laboratory chlorophyll content, SPAD values and atLEAF values were strongly correlated.

Outcome: laboratory leaf chlorophyll (Chl) contente0
Comparator: SPAD values, and atLEAF valuese0

Not reportedTaxonDirection

Verbatim

e0
“strong correlations among laboratory leaf chlorophyll (Chl) content, SPAD values, and atLEAF values”
✓ located verbatim in the source · abstract, characters 671–770

Title

Comparing SPAD and atLEAF values for chlorophyll assessment in crop species

Juanjuan Zhu; Nicolas Tremblay; Yinli Liang Canadian Journal of Soil Science 2012. doi:10.4141/cjss2011-100

Other claims from this paper (2)

Method / resource SPAD and atLEAF performed equivalently across environments and crop species.
Recommendation The authors conclude atLEAF can serve as a less expensive SPAD-502 alternative.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

At 84 days, control chlorophyll content reached 41.62 SPAD value.

Taxon: Centella asiaticaCentella asiaticat0
Outcome: chlorophyll contente0
Value: 41.62 SPAD valuee0

Verbatim

e0
“chlorophyll content (41.62 SPAD value)”
✓ located verbatim in the source · abstract, characters 1000–1038

t0
“Centella asiatica (L.)”
✓ located verbatim in the source · title, characters 80–102

Title

Elevated salt stress level affected the productivity and chlorophyll content of Centella asiatica (L.)

Esita Karmaker; Mahbub Robbani; Md. Mainul Islam; et al. Archives of Agriculture and Environmental Science 2024. doi:10.26832/24566632.2024.0902017

Other claims from this paper (11)

Observation At 84 days, control plants had the highest leaf number, 258.5.
Observation At 84 days, control plants had the highest runner number, 126.75.
Observation At 84 days, control petiole length reached 9.38 cm.
Observation At 84 days, control fresh leaf weight reached 23.92 g.
Observation At 84 days, control dry leaf weight reached 7.97 g.
Observation At 84 days, control fresh shoot weight reached 1.84 g.
Observation At 84 days, control dry shoot weight reached 0.61 g.
Observation Root fresh weight peaked at 150 mM salt, at 1.95 g.
Observation Root dry weight peaked at 150 mM salt, at 0.65 g.
Association Increasing salinity gradually reduced growth parameters.
Intervention effect Salt stress significantly reduced Centella growth and yield.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Mean chlorophyll content was 26.12 SPAD.

Taxon: Cypripedium japonicumCypripedium japonicumt0
Outcome: Chlorophyll contente0
Value: 26.12 SPADe0

Verbatim

t0
“Cypripedium japonicum”
✓ located verbatim in the source · title, characters 57–78

e0
“Chlorophyll content showed average 26.12 SPAD.”
✓ located verbatim in the source · abstract, characters 1714–1760

Title

Habitats Environmental and Population Characteristics of Cypripedium japonicum Thunb., a Rare Species in Korea

Jung-Hun Pi; Ji-Young Jung; Jeong-Geun Park; et al. Korean Journal of Ecology and Environment 2015. doi:10.11614/ksl.2015.48.4.253

Other claims from this paper (16)

Observation The species occurred at elevation 450 to 990 m and slope 5 to 30°.
Observation Habitat slope direction was 0 to 110°.
Observation Habitat mean temperature was 18.94℃.
Association Temperature differences among sites increased with latitude difference, highest at GY.
Observation Mean relative humidity was 77.38% with little site difference.
Observation Average canopy openness was 18.17%.
Observation Canopy openness was highest at HC, 22.1%.
Observation Canopy openness was lowest at MJ, 16.1%.
Observation Average transmitted light was 9.1 mol·m-2·d-1.
Observation Transmitted light was highest at CC, 10.6 mol·m-2·d-1.
Observation Transmitted light was lowest at GY, 6.87 mol·m-2·d-1.
Observation Chlorophyll was highest at MJ, 30.64 SPAD value.
Observation Chlorophyll was lowest at HC, 23.69 SPAD value.
Observation Mean leaf area was 253.35 cm2.
Observation Leaf area was highest at CC, 281.51 cm2.
Observation Leaf area was lowest at HC, 238.23 cm2.

Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

SPAD readings reflected chlorophyll content and total nitrogen content.

Taxon: maizeZea mayse0
Outcome: chlorophyll content,the total nitrogen contente0
Comparator: SPAD readingse0

Verbatim

e0
“the SPAD readings were also suggested to well reflect the chlorophyll content,the total nitrogen content and the maize yield.”
✓ located verbatim in the source · abstract, characters 565–690

Title

Study on the Relationship of SPAD Readings to Nitrogen Content and to Yield in Spring Maize

Jiang Bai-wen Yumi kexue 2011

Other claims from this paper (7)

Method / resource Lobus leaf SPAD readings were sensitive to nitrogen at the 12, 10 and 8 leaf stages.
Method / resource Ear leaf SPAD readings were sensitive at tasseling, filling and dough stages.
Method / resource SPAD readings reflected maize yield.
Method / resource The ten-leaf stage was best for SPAD evaluation of nutritional status and top dressing time.
Method / resource The twelve-leaf stage was best for early yield prediction using SPAD readings.
Method / resource SPAD measurement was convenient and did not damage leaf growth.
Recommendation The authors recommend SPAD readings as an index of maize yield.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Wheat chlorophyll content ranged from 40.26 SPAD in control to 55.57 SPAD under fertilization.

Taxon: WHEATTriticum aestivumt0
Treatment: P150K150N200e0
Outcome: Chlorophyll contente0
Value: 55.57 ± 0.55 (SPAD units)e0
Qualifier: 40.26 ± 1.36 (SPAD units)e0
Comparator: control variant (P0K0N0)e0

Not reportedDirection

Verbatim

e0
“Chlorophyll content ranged from 40.26 ± 1.36 (SPAD units) from control variant (P0K0N0) and 55.57 ± 0.55 (SPAD units) at P150K150N200 variant”
✓ located verbatim in the source · abstract, characters 1290–1431

t0
“WHEAT”
✓ located verbatim in the source · title, characters 65–70

Title

SPECTRAL IMAGING IN THE EVALUATION OF THE CHLOROPHYLL CONTENT IN WHEAT

F. Sala; Marius Boldea; I. Gergen Research Journal of Agricultural Science 2013

Other claims from this paper (3)

Association Chlorophyll content and BHSB color channel were very significantly negatively correlated.
Method / resource Cluster analysis placed experimental variants according to fertilization level.
Association Variant placement was correlated with chlorophyll and HSB and HSL values.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Heat reduced chlorophyll content, CSI and SPAD in all clones.

Taxon: sugarcanet0
Treatment: heat stresse0
Outcome: chlorophyll content, chlorophyll stability index (CSI), SPAD valuee0
Direction: decreasede0

Not reportedComparator

Verbatim

e0
“heat stress decreased chlorophyll content, chlorophyll stability index (CSI), SPAD value”
✓ located verbatim in the source · abstract, characters 205–293

t0
“sugarcane”
✓ located verbatim in the source · title, characters 51–60

Title

Adaptive physiological and biochemical response of sugarcane genotypes to high-temperature stress

S. Kohila; R. Gomathi Indian Journal of Plant Physiology 2018. doi:10.1007/s40502-018-0363-y

Other claims from this paper (12)

Intervention effect Heat reduced PSII efficiency and gas exchange in all clones.
Intervention effect Heat reduced relative water content in all clones.
Intervention effect Heat reduced nitrate reductase and sucrose-metabolizing enzyme activities.
Intervention effect Heat increased proline, total phenolics and soluble sugar content.
Intervention effect Heat increased antioxidant enzyme activities.
Intervention effect Heat increased lipid peroxidation and membrane injury.
Intervention effect Heat increased soluble sugar content.
Method / resource Physiological heat-tolerance indexes separated genotypes into three clusters.
Observation Co 99004 had higher chlorophyll content, CSI and antioxidant enzyme activities than sensitive varieties.
Observation Co 99004 had higher NR activity, RWC and total phenols.
Observation Co 99004 had higher sucrose-metabolizing enzymes, soluble sugar content and leaf gas exchange.
Observation Co 99004 had less lipid peroxidation and membrane injury.

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Nitrogen content and SPAD chlorophyll content were significantly but weakly related.

Taxon: riceOryza sativat0
Compound: Ne0
Outcome: chlorophyll content (SPAD) valuese0

Not reportedDirection

Verbatim

e0
“There was a significant but not very good relationship between N content and chlorophyll content (SPAD) values.”
✓ located verbatim in the source · abstract, characters 1127–1238

t0
“rice”
✓ located verbatim in the source · title, characters 75–79

Title

Effects of preflood nitrogen rate and midseason nitrogen timing on flooded rice

R. CARRERES; J. SENDRA; R. BALLESTEROS; et al. The Journal of Agricultural Science 2000. doi:10.1017/s0021859699007868

Other claims from this paper (10)

Intervention effect Grain yield increased with preflood nitrogen up to 100 kg N/ha.
Observation The main yield component response was panicle number per ground area.
Association Yield components and grain yield depended on timing of extra nitrogen.
Intervention effect Split nitrogen applications did not improve agronomic efficiency.
Intervention effect Split nitrogen applications reduced days to maturity and lodging.
Intervention effect Split nitrogen applications increased harvest index.
Intervention effect Split nitrogen at 150 kg/ha total with the second dose at panicle initiation increased grain yield.
Method / resource The SPAD regression equation differed significantly by growth stage.
Method / resource SPAD may indicate the need for nitrogen topdressing at mid-tillering but not panicle initiation.
Association SPAD was poorly related to yield increase from nitrogen topdressing.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A treatment had the highest SPAD value and chlorophyll content.

Treatment: A treatmente0
Outcome: SPAD value and chlorophyll contente0
Direction: higheste0

Not reportedTaxonComparator

Verbatim

e0
“A treatment had the highest SPAD value and chlorophyll content”
✓ located verbatim in the source · abstract, characters 110–172

Title

Effects of Biological Seed Dressing Agent on Seedling Growth of Super Hybrid Rice

Ning Hui-min 2011

Other claims from this paper (4)

Intervention effect B treatment best strengthened rice seedling root activity.
Intervention effect C treatment greatly increased leaf area and proline content.
Intervention effect D treatment significantly promoted rice seedling root dry weight.
Observation B treatment had the highest mean membership index for comprehensive seedling quality, at 0.88.

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“chlorophyll content (SPAD)”

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