Abstract
To determine the effects of phosphorus nutrition on chilling tolerance of photosynthetic apparatus, tomato (Lycopersicon esculentum Mill. cv. Kenfengxin 2002) plants were raised under different P contents and subjected to 7 d of chilling at 9/7 °C. After chilling (2 h or 7 d) plant growth, P content in tissue, gas exchange and chlorophyll fluorescence were measured. Decreasing P concentration [P] in the nutrient solution markedly reduced plant growth and the chilled plants exhibiting higher optimum [P] than the unchilled plants. Decreasing [P] significantly decreased light saturated net photosynthetic rate (PNsat), maximum carboxylation velocity of Rubisco (Vcmax), maximum potential rate of electron transport contributed to Rubisco regeneration (Jmax), quantum efficiency of photosystem (PS) 2 (ΠPS2) and O2 sensitivity of PNsat (PSO2) and this trend was especially apparent in chilled plants.
Abbreviations
- ci :
-
intercellular CO2 concentration
- Fv/Fm :
-
maximum photochemical efficiency of PS 2
- Fv′/Fm′:
-
efficiency of excitation capture by open PS 2 centers
- gs :
-
stomatal conductance
- Jmax :
-
maximum potential rate of electron transport contributed to Rubisco regeneration
- [P]:
-
phosphorus concentration
- PNsat :
-
light saturated net photosynthetic rate
- PSO2 :
-
O2 sensitivity of photosynthesis
- qp :
-
photochemical quenching coefficient
- S/R:
-
shoot to root ratio
- TPDM:
-
total plant dry mass
- Vcmax :
-
maximum carboxylation velocity of Rubisco
- ΠPS2 :
-
quantum efficiency of PS 2
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Zhou, Y.H., Wu, J.X., Zhu, L.J. et al. Effects of phosphorus and chilling under low irradiance on photosynthesis and growth of tomato plants. Biol Plant 53, 378–382 (2009). https://doi.org/10.1007/s10535-009-0071-6
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DOI: https://doi.org/10.1007/s10535-009-0071-6