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Physiological and transcriptomic analyses of yellow horn (Xanthoceras sorbifolia) provide important insights into salt and saline-alkali stress tolerance.
- Source :
-
PloS one [PLoS One] 2020 Dec 22; Vol. 15 (12), pp. e0244365. Date of Electronic Publication: 2020 Dec 22 (Print Publication: 2020). - Publication Year :
- 2020
-
Abstract
- Yellow horn (Xanthoceras sorbifolia) is an oil-rich woody plant cultivated for bio-energy production in China. Soil saline-alkalization is a prominent agricultural-related environmental problem limiting plant growth and productivity. In this study, we performed comparative physiological and transcriptomic analyses to examine the mechanisms of X. sorbifolia seedling responding to salt and alkaline-salt stress. With the exception of chlorophyll content, physiological experiments revealed significant increases in all assessed indices in response to salt and saline-alkali treatments. Notably, compared with salt stress, we observed more pronounced changes in electrolyte leakage (EL) and malondialdehyde (MDA) levels in response to saline-alkali stress, which may contribute to the greater toxicity of saline-alkali soils. In total, 3,087 and 2,715 genes were differentially expressed in response to salt and saline-alkali treatments, respectively, among which carbon metabolism, biosynthesis of amino acids, starch and sucrose metabolism, and reactive oxygen species signaling networks were extensively enriched, and transcription factor families of bHLH, C2H2, bZIP, NAC, and ERF were transcriptionally activated. Moreover, relative to salt stress, saline-alkali stress activated more significant upregulation of genes related to H+ transport, indicating that regulation of intracellular pH may play an important role in coping with saline-alkali stress. These findings provide new insights for investigating the physiological changes and molecular mechanisms underlying the responses of X. sorbifolia to salt and saline-alkali stress.<br />Competing Interests: The authors have declared that no competing interests exist.
- Subjects :
- China
Chlorophyll metabolism
Gene Expression Regulation, Plant
High-Throughput Nucleotide Sequencing
Plant Proteins genetics
Salt Tolerance
Sapindaceae genetics
Sapindaceae metabolism
Sequence Analysis, RNA
Stress, Physiological
Electrolytes metabolism
Gene Expression Profiling methods
Gene Regulatory Networks
Malondialdehyde metabolism
Sapindaceae growth & development
Subjects
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 15
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 33351842
- Full Text :
- https://doi.org/10.1371/journal.pone.0244365