Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The decrease in photosynthesis in mature leaves showed a trend similar to the decrease in leaf potassium content across the three lettuce types.

Taxon: Lactuca sativaLactuca sativae0
Organ / stage: mature leavese1
Compound: potassiume1
Outcome: The decrease in photosynthesis in mature leavese1
Direction: similar trende1

Verbatim

e0
“three lettuce (Lactuca sativa) types”
✓ located verbatim in the source · abstract, characters 173–209

e1
“The decrease in photosynthesis in mature leaves exhibited a similar trend to the decreased potassium content in the leaves within the three lettuce types, but the factor related to the reduction of photosynthesis was different”
✓ located verbatim in the source · abstract, characters 1526–1752

Title

Plant Growth and Photosynthesis Response to Low Potassium Conditions in Three Lettuce (Lactuca sativa) Types

Geng Zhang; Masahumi Johkan; Masaaki Hohjo; et al. The Horticulture Journal 2016. doi:10.2503/hortj.okd-008

Other claims from this paper (11)

Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

The authors suggest glasshouse conditions might decrease the photosynthesis rate because of both lower PPFD and reflectance.

Treatment: glasshouse conditionse1
Outcome: photosynthesis ratee1
Qualifier: due to both PPFD decrease and reflectancee1

Not reportedTaxon

Verbatim

e1
“glasshouse conditions might decrease the photosynthesis rate due to both PPFD decrease and reflectance”
✓ located verbatim in the source · abstract, characters 1405–1507

Title

Characterization of the Spectrum of Solar Irradiance under Different Crop Protection Coverings in Mediterranean Conditions and Effect on the Interception of Photosynthetically Active Radiation

Gonzalo GURREA-YSASI; Vicente BLANCA-GIMÉNEZ; Inmaculada C. FITA; et al. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 2018. doi:10.15835/nbha47111439

Other claims from this paper (5)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Photosynthesis did not decrease through 87 moles per cubic meter NaCl under optimal assay conditions.

Taxon: cowpeaVigna unguiculatae0
Treatment: NaCl concentrations up to 87 moles per cubic metere1
Outcome: photosynthesise1
Direction: No decreasee1

Not reportedComparator

Verbatim

e0
“leaves of cowpea (Vigna unquiculata [L.] Walp.)”
✓ located verbatim in the source · abstract, characters 21–68

e1
“No decrease in photosynthesis was obtained for NaCl concentrations up to 87 moles per cubic meter in the plant growing media”
✓ located verbatim in the source · abstract, characters 500–624

Title

Salinity Effects on Photosynthesis in Isolated Mesophyll Cells of Cowpea Leaves

Z. Plaut; C. M. Grieve; E. Federman PLANT PHYSIOLOGY 1989. doi:10.1104/pp.91.2.493

Other claims from this paper (10)

Association CO2 fixation was maximal when isolation and assay osmotic potentials approached leaf osmotic potential.
Intervention effect Hypotonic and hypertonic media reduced photosynthesis regardless of growth salinity.
Intervention effect At 130 moles per cubic meter NaCl, photosynthesis fell only 30% under optimal assay conditions.
Observation Photosynthetic inhibition was reversible when saline stress was relieved.
Intervention effect At 173 moles per cubic meter NaCl, photosynthesis was severely and irreversibly inhibited.
Mechanism The severe photosynthetic inhibition was attributed to leaf chloride and sodium accumulation.
Observation Sorbitol uptake by intact cells was insignificant.
Association Sorbitol uptake was not associated with cell volume changes.
Observation Cells from low salinity grown plants had a light response curve similar to controls.
Intervention effect Cells grown at 173 moles per cubic meter NaCl reached light saturation at lower radiant flux density than lower salinity cells.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Leaf water potential apparently primarily controls changes in clear-day photosynthesis, especially the midday decrease.

Taxon: conifersPinopsidae1
Outcome: pattern of photosynthesise0
Qualifier: changes in leaf water potentiale0

Verbatim

e0
“Changes in the pattern of photosynthesis on clear days, especially the midday decrease, are apparently primarily controlled by changes in leaf water potential.”
✓ located verbatim in the source · abstract, characters 105–264

e1
“six different conifers”
✓ located verbatim in the source · abstract, characters 22–44

Title

Patterns of Photosynthesis under Natural Environmental Conditions

John D. Hodges Ecology 1967. doi:10.2307/1933105

Other claims from this paper (9)

Associationobservedoriginal resultmeasured

Claim · model-written summary

The photosynthesis increase was comparable in size to the decrease in dark respiration.

Outcome: dark respiratione0
Direction: decreasee0
Comparator: increasee0

Not reportedTaxon

Verbatim

e0
“The increase was of the same order of magnitude as the decrease noted in dark respiration (Rs).”
✓ located verbatim in the source · abstract, characters 261–356

Title

The decline and recovery of photosynthesis of ponderosa pine seedlings subjected to low, but above freezing temperatures

R. P. Pharis; H. Hellmers; E. Schuurmans Canadian Journal of Botany 1972. doi:10.1139/b72-250

Other claims from this paper (12)

Intervention effect At 11 °C, apparent photosynthesis exceeded that at 23 °C for up to 17 days.
Intervention effect At 3 °C apparent photosynthesis was little affected for the first three days.
Intervention effect At 3 °C apparent photosynthesis declined to about 70% of pretreatment by day 10.
Intervention effect Accounting for dark respiration at 3 °C, actual photosynthesis declined to about 50% by day 10.
Observation Photosynthesis then declined slowly over time.
Observation Rapid recovery after transfer back to 23 °C occurred only after at most one day at low temperature.
Observation After 17 days at 11 °C, apparent photosynthesis returned to pretreatment rates by day 7.
Observation After at least four days at 3 °C, apparent photosynthesis recovery reached 80% by day 7.
Observation After at least four days at 3 °C, apparent photosynthesis recovery reached 90% by day 23.
Observation Dark respiration initially increased after transfer from 3 to 23 °C.
Association Dark respiration later decreased at 23 °C as apparent photosynthesis increased.
Mechanism The authors attribute initial chilling injury to respiratory rather than photosynthetic apparatus.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The afternoon decrease in net photosynthesis was associated with depressed ΦPS2 under high PPFD.

Taxon: grapevineVitist0
Outcome: PNe0
Direction: decreasee0
Comparator: ΦPS2e0

Verbatim

e0
“decrease in PN after midday under saturating PPFD was also associated with the observed depression of ΦPS2 at high PPFD”
✓ located verbatim in the source · abstract, characters 709–828

t0
“grapevine”
✓ located verbatim in the source · title, characters 71–80

Title

Stomatal and non-stomatal limitations to photosynthesis in field-grown grapevine cultivars

D. J. Yu; S. J. Kim; H. J. Lee Biologia Plantarum 2009. doi:10.1007/s10535-009-0019-x

Other claims from this paper (7)

Observation Net photosynthetic rate increased in the morning.
Observation Net photosynthesis saturated at PPFD 1200 to 1500 between 10:00 and 12:00.
Observation Net photosynthesis decreased after midday.
Observation Maximum net photosynthesis in Campbell Early was 13.7 µmol m-2 s-1.
Observation Maximum net photosynthesis in Kyoho was 12.5 µmol m-2 s-1.
Association Stomatal conductance and transpiration changed in parallel with net photosynthesis.
Mechanism The authors suggest afternoon vapour pressure deficit may contribute to declining gs and PN.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Cadmium-associated growth inhibition accompanied a significant decrease in net photosynthesis.

Taxon: B. schmidtiiBetula schmidtiie0
Treatment: Cd treatmente1
Outcome: net photosynthesis measured as $CO_2$ assimilatione0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“the growth inhibition of B. schmidtii seedlings was accompanied by a significant decrease in net photosynthesis measured as $CO_2$ assimilation”
✓ located verbatim in the source · abstract, characters 1108–1251

e1
“Cd treatment levels of three families”
✓ located verbatim in the source · abstract, characters 798–835

Title

Differences in Growth and Photosynthesis among Three Half-sib Families of Betula schmidtii in Response to Cd Treatment

;;;; The Korean Journal of Ecology 2004. doi:10.5141/jefb.2004.27.3.147

Other claims from this paper (4)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The initial decrease in soybean net photosynthesis was mainly attributed to stomatal limitation.

Taxon: soybeanGlycine maxt0
Outcome: decrease of Pne0
Qualifier: stomata limitatione0

Verbatim

t0
“soybean”
✓ located verbatim in the source · title, characters 65–72

e0
“the decrease of Pn was mainly restricted by stomata limitation”
✓ located verbatim in the source · abstract, characters 1012–1074

Title

Effects of sink-limiting treatments on leaf carbon metabolism in soybean

Guo-Wei ZHANG; Kai LI; Si-Jia LI; et al. ACTA AGRONOMICA SINICA 2022. doi:10.3724/sp.j.1006.2022.14024

Other claims from this paper (15)

Intervention effect Sink limitation delayed soybean leaf senescence and abscission and produced stay-green leaves.
Intervention effect Sink limitation inhibited soybean net photosynthetic rate shortly after treatment.
Intervention effect Sink limitation did not affect initial soybean carboxylation rate shortly after treatment.
Intervention effect The inhibitory effect of sink limitation on soybean photosynthesis weakened with time and became promotive.
Observation Stay-green soybean leaves retained higher initial carboxylation rate at late growth stages.
Observation Stay-green soybean leaves retained higher SPS, SuSy and SAI activities at late growth stages.
Observation Stay-green soybean leaves retained higher photosynthetic pigment and soluble sugar content at late growth stages.
Observation Stay-green soybean leaves retained higher starch, sucrose and fructose content at late growth stages.
Intervention effect Sink limitation shifted soybean photosynthetic products toward vegetative organs.
Intervention effect Sink limitation stimulated soybean stems and leaves to act as new sinks.
Intervention effect Removing all pods and injuring seeds delayed soybean leaf senescence and abscission more than removing half the pods.
Intervention effect Removing all pods and injuring seeds reduced soybean photosynthetic performance and carbon metabolism more than removing half the pods.
Association Greater sink limitation produced more severe soybean green retention.
Intervention effect Sink limitation significantly affected soybean carbon metabolism.
Intervention effect Sink limitation maintained higher photosynthetic and key carbon metabolism enzyme activities in soybean at late growth stages.

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The decrease in cassava sucrose content was related to leaf senescence and inhibition of photosynthesis.

Taxon: cassavaManihot esculentat0
Organ / stage: leafe2
Outcome: sucrose contente2
Direction: decreasee2
Qualifier: related to leaf senescence and inhibition of photosynthesise2

Verbatim

t0
“cassava petiole abscission zones”
✓ located verbatim in the source · title, characters 56–88

e2
“The decrease in sucrose content was related to leaf senescence and inhibition of photosynthesis”
✓ located verbatim in the source · abstract, characters 507–602

Title

Expression of sucrose metabolism and transport genes in cassava petiole abscission zones in response to water stress

W. B. Liao; Y. Y. Li; C. Lu; et al. Biologia Plantarum 2016. doi:10.1007/s10535-016-0658-7

Other claims from this paper (10)

Intervention effect Under early water stress, sucrose was transported from leaves to roots in cassava.
Intervention effect In later stages of water stress, a reverse sucrose flow was detected in cassava.
Observation Microarray analysis identified seven sucrose synthase genes in cassava abscission zones under water stress.
Observation Microarray analysis identified nine sucrose transporter genes in cassava abscission zones under water stress.
Observation Microarray analysis identified eight invertase genes in cassava abscission zones under water stress.
Intervention effect Two sucrose synthase genes were significantly upregulated under stress in cassava.
Intervention effect Two invertase genes were significantly upregulated under stress in cassava.
Intervention effect One sucrose transporter gene was downregulated under water stress in cassava.
Association Sucrose synthase and invertase gene expression was negatively correlated with sucrose content under water stress.
Association Sucrose transporter gene expression was positively correlated with sucrose content in cassava.

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Metabolic decrease related to photosynthesis and energy supply is associated with amidosulfuron-induced male sterility in rapeseed.

Taxon: Rapeseedt0
Treatment: amidosulfurone7
Outcome: metabolic decrease related to photosynthesis and energy supplye7
Direction: decreasee7
Qualifier: associated with male sterilitye7

Verbatim

t0
“in Rapeseed”
✓ located verbatim in the source · title, characters 142–153

e7
“The results suggested that metabolic decrease related to photosynthesis and energy supply are associated with male sterility induced by amidosulfuron”
✓ located verbatim in the source · abstract, characters 1812–1961

Title

Acetolactate Synthase-Inhibiting Gametocide Amidosulfuron Causes Chloroplast Destruction, Tissue Autophagy, and Elevation of Ethylene Release in Rapeseed

Xi-Qiong Liu; Cheng-Yu Yu; Jun-Gang Dong; et al. Frontiers in Plant Science 2017. doi:10.3389/fpls.2017.01625

Other claims from this paper (17)

Intervention effect Amidosulfuron at a gametocidal dose caused a short retardation of raceme elongation in rapeseed early after exposure.
Intervention effect Amidosulfuron caused slight chlorosis on rapeseed leaves in the first days after exposure.
Intervention effect Amidosulfuron reduced the photosynthetic rate and leaf chlorophyll content of rapeseed.
Intervention effect Amidosulfuron reduced soluble sugar and pyruvate contents in rapeseed plants.
Intervention effect Amidosulfuron altered the contents of several free amino acids in rapeseed plants, direction not stated.
Intervention effect Amidosulfuron deformed chloroplasts in leaf and anther epidermis and tapetal plastids of rapeseed.
Intervention effect Amidosulfuron caused autophagic vacuoles in tapetal cells and uni-nucleate microspores, which degenerated quickly.
Intervention effect Amidosulfuron treatment yielded 142 up-regulated differential expression transcripts in young flower buds.
Intervention effect Amidosulfuron treatment yielded 201 down-regulated differential expression transcripts in young flower buds.
Intervention effect Amidosulfuron down-regulated the expression of PAIR1, SDS and PPD2 genes in rapeseed flower buds.
Intervention effect Amidosulfuron down-regulated the expression of HFM1, CSTF77 and A6 genes in rapeseed flower buds.
Intervention effect Amidosulfuron down-regulated the expression of ALA6, UGE1 and FLA20 genes in rapeseed flower buds.
Intervention effect Amidosulfuron down-regulated the expression of A9, bHLH91 and a putative cell wall protein in rapeseed flower buds.
Intervention effect Amidosulfuron up-regulated the autophagy-related protein ATG8A in rapeseed flower buds.
Intervention effect Amidosulfuron up-regulated the ethylene-responsive transcription factor RAP2-11-like in rapeseed flower buds.
Intervention effect Amidosulfuron elevated the ethylene release rate of rapeseed.
Mechanism The gene expression changes indicate functional abnormalities in cell cycle, cell wall formation, chloroplast structure and tissue autophagy of amidosulfuron-treated rapeseed.

“decrease of the photosynthesis”

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