Gene co-expression networks unravel the molecular responses of freshwater hydrophytes to combined stress of salinity and cadmium

被引：1

作者：

Wang S.-Q. ^{[1
]}

Zhou X.-L. ^{[1
]}

Jin Y.-S. ^{[1
]}

Jeppesen E. ^{[2
,3
,4
,5
,6
]}

Yang L. ^{[1
]}

Shen S.-K. ^{[1
]}

机构：

[1] Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan Universit

[2] Department of Ecoscience, Aarhus University, Aarhus C

[3] Sino-Danish Centre for Education and Research, Beijing

[4] Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara

[5] Institute of Marine Sciences, Middle East Technical University, Mersin

[6] Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming

来源：

Chemosphere | 2023年 / 340卷

基金：

中国国家自然科学基金;

关键词：

Aquatic plant; Global change; Pistia stratiotes; Salinization; Toxicity;

D O I：

10.1016/j.chemosphere.2023.139933

中图分类号：

学科分类号：

摘要：

Salinization in freshwater lakes is becoming a serious global environmental problem, especially in lakes of plateaus such as south-western plateau of China. However, limited information is available about the molecular response of freshwater hydrophytes to salinity under multiple stress. In the present study, a weighted gene co-expression network (WGCNA) was used to identify the modules of co-expressed genes in the physiological and biochemical indicators of Pistia stratiotes to determine its molecular response to salinity (NaCl) alone and when combined with cadmium (Cd). The physiological and biochemical indicators showed that P. stratiotes improved its salt tolerance by enhancing photosynthetic abilities, reducing oxidative stress, and inducing osmoprotectant generation. Morever, addition of NaCl reduced the Cd accumulation in P. stratiotes. Transcriptome and WGCNA analysis revealed that the pathways of alpha-linolenic acid metabolism, ribosomal, flavonoid biosynthesis, and phenylpropanoid biosynthesis were significantly enriched in both treatments. Genes associated with photosynthesis-antenna proteins, nitrogen metabolism, and the acid cycle pathways were only expressed under salinity stress alone, while the proteasome pathway was only significantly enriched in the combined salinity and Cd treatment. Our findings provide novel insights into the effects of salinization on aquatic plants in freshwater ecosystems and the management of aquatic ecosystems under global change. © 2023 Elsevier Ltd

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