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Huang WT, Zheng ZC, Hua D, Chen XF, Zhang J, Chen HH, Ye X, Guo JX, Yang LT, Chen LS. Adaptive responses of carbon and nitrogen metabolisms to nitrogen-deficiency in Citrus sinensis seedlings. BMC PLANT BIOLOGY 2022; 22:370. [PMID: 35879653 PMCID: PMC9316421 DOI: 10.1186/s12870-022-03759-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND In China, nitrogen (N)-deficiency often occurs in Citrus orchards, which is one of the main causes of yield loss and fruit quality decline. Little information is known about the adaptive responses of Citrus carbon (C) and N metabolisms to N-deficiency. Seedlings of 'Xuegan' (Citrus sinensis (L.) Osbeck) were supplied with nutrient solution at an N concentration of 0 (N-deficiency), 5, 10, 15 or 20 mM for 10 weeks. Thereafter, we examined the effects of N supply on the levels of C and N in roots, stems and leaves, and the levels of organic acids, nonstructural carbohydrates, NH4+-N, NO3--N, total soluble proteins, free amino acids (FAAs) and derivatives (FAADs), and the activities of key enzymes related to N assimilation and organic acid metabolism in roots and leaves. RESULTS N-deficiency elevated sucrose export from leaves to roots, C and N distributions in roots and C/N ratio in roots, stems and leaves, thus enhancing root dry weight/shoot dry weight ratio and N use efficiency. N-deficient leaves displayed decreased accumulation of starch and total nonstructural carbohydrates (TNC) and increased sucrose/starch ratio as well as a partitioning trend of assimilated C toward to sucrose, but N-deficient roots displayed elevated accumulation of starch and TNC and reduced sucrose/starch ratio as well as a partitioning trend of assimilated C toward to starch. N-deficiency reduced the concentrations of most FAADs and the ratios of total FAADs (TFAADs)/N in leaves and roots. N-deficiency reduced the demand for C skeleton precursors for amino acid biosynthesis, thus lowering TFAADs/C ratio in leaves and roots. N-deficiency increased (decreased) the relative amounts of C-rich (N-rich) FAADs, thus increasing the molar ratio of C/N in TFAADs in leaves and roots. CONCLUSIONS Our findings corroborated our hypothesis that C and N metabolisms displayed adaptive responses to N-deficiency in C. sinensis seedlings, and that some differences existed between roots and leaves in N-deficiency-induced alterations of and C and N metabolisms.
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Affiliation(s)
- Wei-Tao Huang
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Zhi-Chao Zheng
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Dan Hua
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Xu-Feng Chen
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Jiang Zhang
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Huan-Huan Chen
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Xin Ye
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Jiu-Xin Guo
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Lin-Tong Yang
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
| | - Li-Song Chen
- Department of Resources and Environment, College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002 China
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Guo H, Pu X, Jia H, Zhou Y, Ye G, Yang Y, Na T, Wang J. Transcriptome analysis reveals multiple effects of nitrogen accumulation and metabolism in the roots, shoots, and leaves of potato (Solanum tuberosum L.). BMC PLANT BIOLOGY 2022; 22:282. [PMID: 35676629 PMCID: PMC9178895 DOI: 10.1186/s12870-022-03652-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Nitrogen (N) is a major element and fundamental constituent of grain yield. N fertilizer plays an essential role in the roots, shoots, and leaves of crop plants. Here, we obtained two N-sensitive potato cultivars. RESULTS The plants were cultivated in the pots using N-deficient and N-sufficient conditions. Crop height, leaf chlorophyll content, dry matter, and N-accumulation significantly decreased under N-deficient conditions. Furthermore, we performed a comprehensive analysis of the phenotype and transcriptome, GO terms, and KEGG pathways. We used WGCNA of co-expressed genes, and 116 differentially expressed hub genes involved in photosynthesis, nitrogen metabolism, and secondary metabolites to generate 23 modules. Among those modules, six NRT gene families, four pigment genes, two auxin-related genes, and two energy-related genes were selected for qRT-PCR validation. CONCLUSIONS Overall, our study demonstrates the co-expressed genes and potential pathways associated with N transport and accumulation in potato cultivars' roots, shoots, and leaves under N-deficient conditions. Therefore, this study provides new ideas to conduct further research on improving nitrogen use efficiency in potatoes.
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Affiliation(s)
- Heng Guo
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Xiuqin Pu
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Hao Jia
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Yun Zhou
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Guangji Ye
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Yongzhi Yang
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Tiancang Na
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
| | - Jian Wang
- Qinghai University/Qinghai Academy of Agriculture and Forestry Sciences/Northwest potato Engineering Research Center of Ministry of Education/Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining, 810016 Qinghai China
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