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Chen J, Li X, Ye X, Guo P, Hu Z, Qi G, Cui F, Liu S. An S-ribonuclease binding protein EBS1 and brassinolide signaling are specifically required for Arabidopsis tolerance to bicarbonate. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1449-1459. [PMID: 33165537 DOI: 10.1093/jxb/eraa524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/03/2020] [Indexed: 06/11/2023]
Abstract
Bicarbonate (NaHCO3) present in soils is usually considered to be a mixed stress for plants, with salts and high pH. NaHCO3-specific signaling in plants has rarely been reported. In this study, transcriptome analyses were conducted in order to identify NaHCO3-specific signaling in Arabidopsis. Weighted correlation network analysis was performed to isolate NaHCO3-specific modules in comparison with acetate treatment. The genes in the NaHCO3-root-specific module, which exhibited opposite expression to that in sodium acetate treatments, were further examined with their corresponding knock-out mutants. The gene Exclusively Bicarbonate Sensitive 1 (EBS1) encoding an S-ribonuclease binding protein, was identified to be specifically involved in plant tolerance to NaHCO3, but not to the other two alkaline salts, acetate and phosphate. We also identified the genes that are commonly regulated by bicarbonate, acetate and phosphate. Multiple brassinosteroid-associated gene ontology terms were enriched in these genes. Genetic assays showed that brassinosteroid signaling positively regulated plant tolerance to NaHCO3 stress, but negatively regulated tolerance to acetate and phosphate. Overall, our data identified bicarbonate-specific genes, and confirmed that alkaline stress is mainly dependent on the specificities of the weak acid ions, rather than high pH.
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Affiliation(s)
- Jipeng Chen
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
| | - Xiaoxiao Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
| | - Xiaoxue Ye
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin, China
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore
| | - Peng Guo
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
| | - Zhubing Hu
- State Key Laboratory of Cotton Biology, Department of Biology, Institute of Plant Stress Biology, Henan University, Kaifeng, China
| | - Guoning Qi
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
| | - Fuqiang Cui
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
| | - Shenkui Liu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
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Lundberg P, Harmsen E, Ho C, Vogel HJ. Nuclear magnetic resonance studies of cellular metabolism. Anal Biochem 1990; 191:193-222. [PMID: 2085167 DOI: 10.1016/0003-2697(90)90210-z] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- P Lundberg
- Department of Biological Sciences, University of Calgary, Alberta, Canada
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Rodriguez MM, Heyser JW. Growth inhibition by exogenous proline and its metabolism in saltgrass (Distichlis spicata) suspension cultures. PLANT CELL REPORTS 1988; 7:305-308. [PMID: 24241870 DOI: 10.1007/bf00269924] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/1987] [Revised: 05/05/1988] [Indexed: 06/02/2023]
Abstract
The growth of Distichlis spicata suspension cultures in LS medium without NaCl was inhibited 54% by 2 mM proline. In medium containing 260 mM NaCl, 10 mM proline inhibited growth by only 22%. The uptake and metabolism of 10 mM L-[1-(13)C] proline was followed by (13)C NMR and ninhydrin analyses of suspensions cultured in the presence of 0 or 260 mM NaCl. Uptake of 85 to 92% of the exogenous proline occurred within 72 h in all media. In 10 mM proline and no NaCl, cellular proline reached a maximm of 51.5 μmoles/g FW compared to 1.9 μmoles/g FW in suspensions not grown on proline. In medium containing 260 mM NaCl and proline, cellular proline reached 59-65 μmoles/g FW compared to 30-40 μmoles/g FW in controls grown without proline. The (13)C-label in the proline-C1 was either retained in proline or disappeared, presumably released as carbon dioxide, by catabolism through the TCA cycle. Since no metabolite of (13)C-proline was detected by NMR, proline was considered to be the molecule which inhibited the suspension culture growth.
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Affiliation(s)
- M M Rodriguez
- Genetics Group (LS-3), Mail Stop M886, Life Science Division, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA
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