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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Transcriptomic profiling revealed genes involved in response to cold stress in maize

Meng Li A C , Na Sui https://orcid.org/0000-0003-0411-0162 B , Lin Lin E , Zhen Yang D F and Yuanhu Zhang A F
+ Author Affiliations
- Author Affiliations

A State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, China.

B Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China.

C Shandong Academy of Agricultural Sciences, Jinan, Shandong, China.

D Shandong Provincial Key Laboratory of Microbial Engineering, School of Biologic Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China.

E Water Research Institute of Shandong Province, No. 125 Lishan Road, Jinan City, Shandong Province, China.

F Corresponding authors. Email: gina35@126.com; yhzhang9@163.com

Functional Plant Biology 46(9) 830-844 https://doi.org/10.1071/FP19065
Submitted: 6 March 2019  Accepted: 6 May 2019   Published: 20 June 2019

Abstract

Maize is an important food crop. Chilling stress can decrease maize production by affecting seed germination and seedling growth, especially in early spring. We analysed chlorophyll fluorescence, membrane lipids, secondary metabolites and the transcriptome of two maize inbred lines (chilling-tolerant M54 and chilling-sensitive 753F) after 0, 4 and 24 h cold stress. M54 showed better ability to protect PSII and accumulate secondary metabolites. From RNA sequencing data, we determined that the majority of cold-affected genes were involved in photosynthesis, secondary metabolism, and signal transduction. Genes important for maintaining photosystem structure and for regulating electron transport were less affected by cold stress in M54 than in 753F. Expression of genes related to secondary metabolism and unsaturated fatty acid synthesis were upregulated more strongly in M54 than in 753F and M54 accumulated more unsaturated fatty acids and secondary metabolites. As a result, M54 achieved relatively high cold tolerance by protecting the photosystems and maintaining the stability of cell membranes.

Additional keywords: cold stress, lipids, maize, membrane, photosynthesis, transcriptomic profiling.


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