Abstract
As a common tree species in northern China, Populus × euramericana “Neva” has an important practical value for the study of continuous cropping obstacles in poplar cultivation. Plant allelopathy is the main reason for continuous cropping obstacles, which are caused by allelochemicals, such as para-hydroxybenzoic acid (p-HB). The objective of this study was to investigate the effects of p-HB on the photosynthesis of poplar. Photosynthetic parameters of Populus × euramericana “Neva” poplar were determined in a pot culture experiment where five p-HB concentrations were used (0, 1, 2, 4, and 6 mmol L−1). Each seedling was treated with 4 L of p-HB solution every seven days, ten times in total. p-HB inhibited the photosynthesis of poplar significantly, as shown by a clear decline in the net photosynthetic rate. Our results indicated nonstomatal limitation responsible for the photosynthesis reduction.
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Abbreviations
- AQY:
-
apparent quantum yield
- C a :
-
air CO2 concentration
- C i :
-
intercellular CO2 concentration
- Chl:
-
chlorophyll
- E :
-
transpiration rate
- F0 :
-
minimal fluorescence yield of the dark-adapted state
- F0' :
-
minimal fluorescence yield of the light-adapted state
- Fm :
-
maximal fluorescence yield of the dark-adapted state
- Fm':
-
maximal fluorescence yield of the light-adapted state
- Fs :
-
steadystate fluorescence yield
- Fv :
-
variable fluorescence
- Fv/Fm :
-
maximal quantum yield of PSII photochemistry
- g s :
-
stomatal conductance
- LCP:
-
light-compensation point
- Ls :
-
stomatal limitation
- LSP:
-
light-saturation point
- NPQ:
-
nonphotochemical quenching
- p-HB:
-
para-hydroxybenzoic acid
- P N :
-
net photosynthetic rate
- P Nmax :
-
light-saturated net photosynthetic rate
- qP :
-
photochemical quenching coefficient
- R D :
-
respiration rate
- WUE:
-
water-use efficiency
- ФPSII :
-
effective quantum yield of PSII photochemistry.
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Liang, G.T., Zhang, S.Y., Guo, J. et al. The effects of para-hydroxybenzoic acid treatment on photosynthetic parameters of Populus × euramericana “Neva”. Photosynthetica 56, 505–511 (2018). https://doi.org/10.1007/s11099-017-0713-4
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DOI: https://doi.org/10.1007/s11099-017-0713-4