Effects of summer pruning on the growth and photosynthetic characteristics of pepper (Capsicum annuum L.)
Ying Peng
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, Chinahttps://orcid.org/0000-0003-0937-5047
Hui Tong
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, Chinahttps://orcid.org/0009-0003-2048-0080
Wuping Yin
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, Chinahttps://orcid.org/0009-0007-4172-4602
Ye Yuan
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Institute of Agricultural Environment and Ecology, Changsha 410125, Chinahttps://orcid.org/0000-0002-1942-9152
Zuhua Yuan
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, Chinahttps://orcid.org/0009-0007-2106-6403
Abstrakt
The objective of the study is to investigate the mechanism by which summer pruning enhances the growth of pepper plants, as indicated by growth and fruit appearance indicators, photosynthetic rate and gas exchange parameters, rapid light response and induction kinetics curves and the related chlorophyll fluorescence parameters. The results indicated that the leaf growth rate, the individual pepper fruit weight, and the fruit longitudinal and cross diameters of the pruned group were significantly higher than those of the control. The stomatal conductance (Gs), intercellular CO2 concentration (Ci) and transpiration rate (Tr) of the pruned group were significantly higher than those of the control. The initial slope of the rapid light response curve, which represents light energy utilisation efficiency (α), the maximum electron transfer rate (Jmax) and saturated light intensity (PARsat) were all higher in the summer pruning group than in the control group. The F0 of the pruned group decreased by 16.83%, Fv/F0 increased by 23.69%, PIabs increased by 58.33%, and DIo/RC decreased by 22.09% compared to the control group. In summary, summer pruning significantly improves the leaf growth rate and fruit appearance quality of pepper, effectively promotes the photosynthesis of functional leaves, and reduces the degree of stress under adverse environmental conditions.
Słowa kluczowe:
chlorophyll fluorescence induction kinetics curves, chlorophyll fluorescence parameters, fruit appearance, gas exchange parameters, rapid light-response curvesBibliografia
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Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, China https://orcid.org/0000-0003-0937-5047
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, China https://orcid.org/0009-0003-2048-0080
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, China https://orcid.org/0009-0007-4172-4602
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Institute of Agricultural Environment and Ecology, Changsha 410125, China https://orcid.org/0000-0002-1942-9152
Hunan Academy of Agricultural Science, Changsha 410125, China; Hunan Vegetable Research Institute, Changsha 410125, China https://orcid.org/0009-0007-2106-6403
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