Claim · model-written summary
The heat-induced K-step was less pronounced in apple leaves than in peel after exposure to 42 °C or higher
- Taxon
- apple
Malus domesticae0 - Organ / stage
- leavese1
- Treatment
- exposed to 42 °C or higher temperaturee1
- Outcome
- Heat-induced K-stepe1
- Direction
- less pronouncede1
- Comparator
- peele1
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple (Malus domestica Borkh. cv. Cortland) leaves and peel”
e1“Heat-induced K-step became less pronounced in leaves than in peel when exposed to 42 °C or higher temperature”
Title
L. S. Chen; L. Cheng Photosynthetica 2009. doi:10.1007/s11099-009-0017-4
Other claims from this paper (14)
- Intervention effect The positive L-step was more pronounced in apple peel than in leaves after exposure to 44 °C
- Observation Apple leaves had negative L- and K-steps relative to the peel
- Intervention effect The heat-stress decrease of the oxygen-evolving complex was higher in apple peel than in leaves
- Intervention effect The OJIP transient of apple peel treated at 46 °C could not reach the maximum fluorescence (Fm)
- Observation Relative variable fluorescence at 30 ms (VI) showed a big decrease, especially in apple leaves
- Intervention effect At 44 °C, apple leaves had less decreased Fv/Fm, KP and Fm than peel
- Intervention effect At 44 °C, apple leaves had less decreased PIabs than peel
- Intervention effect At 44 °C, apple leaves had less increased F0 and KN than peel
- Intervention effect At 44 °C, apple leaves had more increased reduction of PS1 end acceptors per cross section and per reaction center than peel
- Intervention effect At 44 °C, apple leaves had more increased electron-transport quantum yield (φR0) than peel
- Intervention effect At 44 °C, apple leaves had more increased total PI (PIabs,total) than peel
- Observation PS2 is more thermally labile than PS1 in apple
- Mechanism Heat-stress reduction of PS2 activity in apple primarily results from inactivation of the oxygen-evolving complex
- Intervention effect PS2 was more tolerant to high temperature in apple leaves than in peel