Transcriptome Profiles of Leaves and Roots of Goldenrain Tree ( Koelreuteria paniculata Laxm.) in Response to Cadmium Stress

Qihao He, Tao Zhou, Jikang Sun, Ping Wang, Chunping Yang, Lei Bai and Zhiming Liu
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Qihao He: College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Tao Zhou: College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
Jikang Sun: College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
Ping Wang: College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Chunping Yang: Guangdong Provincial Key Laboratory of Petrochemcial Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
Lei Bai: College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
Zhiming Liu: Department of Biology, Eastern New Mexico University, Portales, NM 88130, USA

IJERPH, 2021, vol. 18, issue 22, 1-14

Abstract: Cadmium (Cd) pollution is a widespread environmental problem. In this study, we explored the transcriptome and biochemical responses of goldenrain tree ( Koelreuteria paniculata Laxm.) leaves and roots to Cd stress. Leaf and root growth decreased substantially under Cd stress (50 mg/L CdCl 2 ), but leaf and root antioxidant mechanisms were significantly activated. In RNA-seq analysis, roots treated with 25 mg/L CdCl 2 featured enriched GO terms in cellular components related to intracellular ribonucleoprotein complex, ribonucleoprotein complex, and macromolecular complex. In leaves under Cd stress, most differentially expressed genes were enriched in the cellular component terms intrinsic component of membrane and membrane part. Weighted gene co-expression network analysis and analysis of module–trait relations revealed candidate genes associated with superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities and malondialdehyde (MDA). Ten transcription factors responded to Cd stress expression, including those in C2H2, MYB, WRKY, and bZIP families. Transcriptomic analysis of goldenrain tree revealed that Cd stress rapidly induced the intracellular ribonucleoprotein complex in the roots and the intrinsic component of membrane in the leaves. The results also indicate directions for further analyses of molecular mechanisms of Cd tolerance and accumulation in goldenrain tree.

Keywords: goldenrain tree; Cd stress; transcription factors; weighted gene co-expression network analysis; transcriptome (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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