Claim · model-written summary
Net photosynthesis of Conocephalum conicum is positive even at very low irradiances.
- Taxon
- Conocephalum conicum
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Conocephalum conicumt0 - Outcome
- net photosynthesis is positivee4
- Qualifier
- even at very low irradiancese4
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
t0“Liverwort Conocephalum conicum”
e4“so net photosynthesis is positive even at very low irradiances”
Title
Photosynthetic Electron Transport in the Liverwort Conocephalum conicum (Marchantiales)
Raymond J. Ritchie Journal of Botanical Research 2025. doi:10.30564/jbr.v6i3.9222
Other claims from this paper (18)
- Observation Chlorophyll a content of Conocephalum conicum was about 241 mg Chl a m-2.
- Observation The Chl b/a ratio of Conocephalum conicum was about 0.216.
- Observation At mid-morning the maximal yield Ymax of Conocephalum conicum was about 0.629.
- Observation The irradiance at the half point for yield of Conocephalum conicum was about 231 μmol photon m-2 s-1.
- Observation The optimum irradiance Eopt of Conocephalum conicum was about 910 μmol photon m-2 s-1.
- Observation The maximum electron transport rate ETRmax of Conocephalum conicum was about 266 μmol e- g-1 Chl a s-1.
- Observation The photosynthetic efficiency Alpha of Conocephalum conicum was about 0.794 e- photon-1 g-1 Chl a.
- Observation Photoinhibition was significant in Conocephalum conicum at high irradiances.
- Observation Eopt and ETRmax of Conocephalum conicum were substantially lower in the afternoon.
- Observation Under full sunlight, daily gross photosynthesis Pg of Conocephalum conicum was about 39.6 gC g-1 Chl a d-1.
- Observation In the shaded greenhouse, daily gross photosynthesis Pg of Conocephalum conicum was about 29.6 gC g-1 Chl a d-1.
- Observation Daily gross photosynthesis Pg of Conocephalum conicum on a projected surface area basis was about 7.14 gC m-2 d-1.
- Observation The respiration rate of Conocephalum conicum was relatively low, about 2.23 μmol O2 g-1 Chl a s-1.
- Observation Greenhouse-grown Conocephalum conicum showed optimum photosynthesis rates in midmorning and midday, decreasing in the afternoon.
- Observation Conocephalum conicum grown under LED lights had a very low optimum irradiance Eopt, about 90 μmol photon m-2 s-1.
- Observation Conocephalum conicum grown under LED lights had a maximum electron transport rate ETRmax of about 40 μmol g-1 Chl a s-1.
- Observation Greenhouse-grown Conocephalum conicum had photosynthetic maxima of about 1/3 to 1/2 of full sunlight.
- Observation Conocephalum conicum can use HCO3- as a carbon source, according to pH experiments.