Influence of Aluminum Treatment on the Photosynthetic Fluorescence Dynamics Characteristics During the Flowering Stage of Camellia oleifera
Taking 8-year-old'Xianglin 210'Camellia oleifera as the test material,the effects of aluminum stress on chlorophyll content and photosynthetic fluorescence parameters of Camellia oleifera during flowering were studied by spraying different concentrations of aluminum solution on the leaves,in order to explore the effects of different concentrations of aluminum treatment on Photosynthetic fluorescence dynamic characteristics of Camellia oleifera during flowering.The results showed that the application of aluminum solutions at different concentrations had a non-significant effect on chlorophyll content,but it did modulate the capacity to absorb photosynthetically active radiation(PAR).The treatment group with 0.05 mol·L-1 aluminum exhibited a markedly higher PAR at 12:10 compared to the control,while the 0.10 mol·L 1 aluminum treatment maintained elevated PAR across several time points,suggesting that an optimal concentration of aluminum could augment PAR absorption and consequently enhance photosynthetic efficiency.The diurnal changes in non-photochemical quenching(NPQt)indicated that the group treated with 0.15 mol·L-1aluminum had the highest NPQt values at multiple time points,which implied that aluminum treatment was capable of bolstering the photoprotective mechanism,thereby improved the plant's adaptability to intense light conditions.The effective quantum yield of photosystem Ⅱ(Φ2)was found to be highest in the group treated with 0.15 mol·L-1 aluminum,further substantiating the role of aluminum in augmenting the light energy utilization efficiency of oil tea.Collectively,these results indicated that C.oleifera could adapt to aluminum stress by adjusting photosynthetic fluorescence parameters,which helps to safeguard the plant from adverse impacts on the photosynthetic apparatus.
Camellia oleiferaaluminum stressphotosynthetic fluorescence parametersnon-photochemical quenchingquantum yield of photosystem Ⅱ
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维普
