Abstract
This study aimed to investigate the effects of waterlogging on the growth and photosynthetic characteristics of paired near-isogenic lines of waterlogging-tolerant (Zz-R) and waterlogging-sensitive (Zz-S) waxy corn inbred line seedlings. All plants were grown until the fifth leaves were fully expanded. Subsequently the plants in the pots were submerged in water for 4 d. During the waterlogging period, morphological and photosynthetic parameters related to waterlogging tolerance were examined. After 4 d, a significant decrease was observed in shoot and root fresh mass, net photosynthetic rate, stomatal conductance, transpiration, water-use efficiency, light-saturation point, maximal photosynthetic rate, apparent quantum yield, maximal quantum yield of PSII, and effective quantum yield of PSII photochemistry in waterlogged plants of both genotypes. The Zz-R genotype showed lesser reduction in all mentioned indices when compared to the Zz-S genotype. The inhibition of photosynthesis under waterlogging occurred due to the reduction in stomatal conductance, fluorescence parameters, and chlorophyll content. Thus, our study revealed that the Zz-R genotype can be a source of genetic diversity for important traits such as morphological and photosynthetic parameters.
Abbreviations
- AQY:
-
apparent quantum yield
- Chl:
-
chlorophyll
- CK:
-
control
- E :
-
transpiration
- Fv/Fm :
-
maximal quantum yield of PSII
- g s :
-
stomatal conductance
- Ls :
-
light-saturation point
- Lc :
-
light-compensation point
- P max :
-
maximal photosynthetic rate
- P N :
-
net photosynthetic rate
- RD:
-
dark respiration rate
- RFM:
-
root fresh mass
- SFM:
-
shoot fresh mass
- W4:
-
waterlogging for 4 d
- WUE:
-
water-use efficiency
- ФPSII :
-
effective quantum yield of PSII photochemistry
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Acknowledgements: This study was supported by the Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province (Grant No. 2014057) and Maize Breeding and Related Technology Research Innovation Team of Liaoning Province (Grant No. 2014201003).
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Zhu, M., Li, F.H. & Shi, Z.S. Morphological and photosynthetic response of waxy corn inbred line to waterlogging. Photosynthetica 54, 636–640 (2016). https://doi.org/10.1007/s11099-016-0203-0
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DOI: https://doi.org/10.1007/s11099-016-0203-0