Claim · model-written summary
Developing leaves showed declining chlorophyll content and ratio and photosystem 2 efficiency, with rising non-photochemical quenching.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacume1 - Organ / stage
- developing leavese0
- Outcome
- chlorophyll (Chl) a+b content and Chl a/b ratioe0
- Direction
- decreasinge0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Symptoms of senescence in developing leaves were: decreasing chlorophyll (Chl) a+b content and Chl a/b ratio, decreasing both maximum (FV/FM) and actual (ΦPS2) photochemical efficiency of photosystem 2, and increasing non-photochemical quenching.”
e1“Nicotiana tabacum L. plants at three irradiances”
Title
B. Radochová; I. Tichá Photosynthetica 2008. doi:10.1007/s11099-008-0081-1
Other claims from this paper (4)
- Intervention effect Senescence symptoms appeared early under high irradiance and later under middle irradiance.
- Association Net photosynthetic oxygen evolution did not consistently decrease with chlorophyll content.
- Observation Net photosynthetic oxygen evolution rose during leaf expansion, peaked before full expansion and then tended to decline.
- Intervention effect Excess irradiance impaired photosynthetic performance and chlorophyll content and changed their ontogenetic course, without starting senescence early.