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Proteomic changes may lead to yield alteration in maize under carbon dioxide enriched condition

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Abstract

In the present study, the effect of elevated CO2 on growth, physiology, yield and proteome was studied on two maize (Zea mays L.) varieties grown under Free-air CO2 enrichment. Growth in high CO2 (530 ppm) did not affect either photosynthesis or pigment contents in both varieties. Reduced MDA content, antioxidant and antioxidative enzymes levels were observed in both varieties in response to high CO2. PEHM-5 accumulated more biomass than SMH-3031 under eCO2. PEHM-5 also had more seed starch and total soluble sugar than SMH-3031. However, SMH-3031 had increased number of seed per cob than PEHM-5. Interestingly, thousand seed weight was significantly increased in PEHM-5 only, while it was decreased in SMH-3031 under eCO2. We observed increased seed size in PEHM-5, while the size of the SMH-3031 seeds remained unaltered. Leaf proteomics revealed more abundance of proteins related to Calvin cycle, protein synthesis assembly and degradation, defense and redox homeostasis in PEHM-5 that contributed to better growth and yield in elevated CO2. While in SMH-3031 leaf, proteins related to Calvin cycle, defense and redox homeostasis were less abundant in elevated CO2 resulting in average growth and yield. The results showed a differential response of two maize varieties to eCO2.

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Acknowledgements

Authors are grateful to Director, CSIR-NBRI, Lucknow, India for providing all necessary facilities. Funding for this work was provided by the Council of Scientific & Industrial Research (CSIR), New Delhi, India (Project Nos. PSC 112, BSC 109). We thank editor and two anonymous reviewers for their valuable comments and suggestions that helped us to improve the manuscript.

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VP, NP and VKM designed the experiment. Yield and physiological analysis were performed by VKM, SKG, BM and MS. VKM and BM did the enzymatic and biochemical analysis. VK, SKG, MS and FD did proteomic work. VKM and VP analyzed the data. VKM wrote and VP reviewed the manuscript. All the authors approved the paper.

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Correspondence to Vivek Pandey.

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Maurya, V.K., Gupta, S.K., Sharma, M. et al. Proteomic changes may lead to yield alteration in maize under carbon dioxide enriched condition. 3 Biotech 10, 203 (2020). https://doi.org/10.1007/s13205-020-02189-2

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  • DOI: https://doi.org/10.1007/s13205-020-02189-2

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