Abstract
Background and aims
Cotyledons are important nutrient sources for seedling establishment in seed plants, however, the acorns are often consumed by rodents and/or insects. This study aimed to examine the compensation or enhancement effect of soil nutrient for cotyledon damage on seedlings of Quercus acutissima under different light conditions.
Methods
We simulated three levels of predation (no damage; mild damage, excised 1/3 of cotyledons from the distal end and severe damage, excised 2/3 of cotyledons from the distal end), two soil nutrient contents (high and low nutrient) and two light intensities (high and low light) in a greenhouse experiment. Seedling survival rate, height, stem basal diameter, specific leaf area, chlorophyll concentration, leaf gas exchange, leaf nitrogen and phosphorus concentration, leaf number, total and partitioned dry biomass were determined.
Results
Cotyledon damage had detrimental effects on height, stem basal diameter, dry weight, leaf number and net photosynthetic rate of the seedlings under high light condition. When soil nutrient was supplemented, the impact of cotyledon damage on the growth of seedlings was alleviated, which indicated the compensation or enhancement effect of soil nutrient on cotyledon damage. However, the compensation or enhancement effect was light-dependent, and was reduced under low light conditions.
Conclusions
Soil nutrients could partially replace the role of cotyledons in the growth and development of Q. acutissima seedlings, but shading reduced the compensation or enhancement effect of soil nutrients. Therefore, cotyledons are especially vital for seedling regeneration in nutrient-poor soil environment, particularly in low light intensity conditions.
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Abbreviations
- A :
-
Net photosynthetic rate
- E :
-
Transpiration rate
- SLA:
-
Specific leaf area
- ND:
-
No cotyledon damage
- MD:
-
Mild cotyledon damage
- SD:
-
Severe cotyledon damage
- HN:
-
High nutrient
- LN:
-
Low nutrient
- HL:
-
High light
- LL:
-
Low light
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Acknowledgements
The authors thank the editor and reviewers for their constructive comments and advice on our manuscript. The study was funded by the Natural Science Foundation of Shandong Province, China (No. ZR2020MC035), the Basic Work of the Ministry of Science and Technology, China (No. 2015FY210200), the Shandong Province “Double-Hundred Talent Plan” Project (No. WSG2018023), and the Research Foundation of Qingdao Forest Ecosystem (No. 11200005071603).
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All authors contributed assistance to this study and the manuscript preparation. M.Z., R.W., and N.D. designed the original framework. M.Z. performed the experiments with the help of H.C., L.Q., X.S., Q.L., X.L., and N.W. H.C. and M.Z. wrote the manuscript with the help of N.D. and J.Z. H.C. revised the manuscript with the help of J.Z., W.Z., W.G., R.W., F.Z., and N.D.
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Chen, H., Zhao, M., Qi, L. et al. Shading reduced the compensation and enhancement effects of soil nutrition on the growth of cotyledon-damaged Quercus acutissima seedlings. Plant Soil 482, 665–678 (2023). https://doi.org/10.1007/s11104-022-05719-4
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DOI: https://doi.org/10.1007/s11104-022-05719-4