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Yang X, Bai Z, He Y, Wang N, Sun L, Li Y, Yin Z, Wang X, Zhang B, Han M, Lu X, Chen X, Wang D, Wang J, Wang S, Guo L, Chen C, Feng K, Ye W. Genome-wide characterization of DNA methyltransferase family genes implies GhDMT6 improving tolerance of salt and drought on cotton. BMC PLANT BIOLOGY 2024; 24:312. [PMID: 38649800 PMCID: PMC11036760 DOI: 10.1186/s12870-024-04985-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND DNA methylation is an important epigenetic mode of genomic DNA modification and plays a vital role in maintaining epigenetic content and regulating gene expression. Cytosine-5 DNA methyltransferase (C5-MTase) are the key enzymes in the process of DNA methylation. However, there is no systematic analysis of the C5-MTase in cotton so far, and the function of DNMT2 genes has not been studied. METHODS In this study, the whole genome of cotton C5-MTase coding genes was identified and analyzed using a bioinformatics method based on information from the cotton genome, and the function of GhDMT6 was further validated by VIGS experiments and subcellular localization analysis. RESULTS 33 C5-MTases were identified from three cotton genomes, and were divided into four subfamilies by systematic evolutionary analysis. After the protein domain alignment of C5-MTases in cotton, 6 highly conserved motifs were found in the C-terminus of 33 proteins involved in methylation modification, which indicated that C5-MTases had a basic catalytic methylation function. These proteins were divided into four classes based on the N-terminal difference, of which DNMT2 lacks the N-terminal regulatory domain. The expression of C5-MTases in different parts of cotton was different under different stress treatments, which indicated the functional diversity of cotton C5-MTase gene family. Among the C5-MTases, the GhDMT6 had a obvious up-regulated expression. After silencing GhDMT6 with VIGS, the phenotype of cotton seedlings under different stress treatments showed a significant difference. Compared with cotton seedlings that did not silence GhDMT6, cotton seedlings silencing GhDMT6 showed significant stress resistance. CONCLUSION The results show that C5-MTases plays an important role in cotton stress response, which is beneficial to further explore the function of DNMT2 subfamily genes.
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Affiliation(s)
- Xiaomin Yang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
- Cash Crop Research Institute of Jiangxi Province, Jiujiang, Jiangxi, 332105, China
| | - Zhigang Bai
- Cash Crop Research Institute of Jiangxi Province, Jiujiang, Jiangxi, 332105, China
| | - Yunxin He
- Hunan Institute of Cotton Science, Changde, Hunan, 415101, China
| | - Ning Wang
- Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu, 730070, China
| | - Liangqing Sun
- Cash Crop Research Institute of Jiangxi Province, Jiujiang, Jiangxi, 332105, China
| | - Yongqi Li
- Cash Crop Research Institute of Jiangxi Province, Jiujiang, Jiangxi, 332105, China
| | - Zujun Yin
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Xiaoge Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Binglei Zhang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Mingge Han
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Xuke Lu
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Xiugui Chen
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Delong Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Junjuan Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Shuai Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Lixue Guo
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Chao Chen
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China
| | - Keyun Feng
- Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu, 730070, China.
| | - Wuwei Ye
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Anyang, Henan, 455000, China.
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Zhao J, Wang W, Zhou H, Wang R, Zhang P, Wang H, Pan X, Xu J. Manganese Toxicity Inhibited Root Growth by Disrupting Auxin Biosynthesis and Transport in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2017; 8:272. [PMID: 28316607 PMCID: PMC5334637 DOI: 10.3389/fpls.2017.00272] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/14/2017] [Indexed: 05/05/2023]
Abstract
Mn toxicity inhibits both primary root (PR) growth and lateral root development. However, the mechanism underlying Mn-mediated root growth inhibition remains to be further elucidated. Here, we investigated the role of auxin in Mn-mediated inhibition of PR growth in Arabidopsis using physiological and genetic approaches. Mn toxicity inhibits PR elongation by reducing meristematic cell division potential. Mn toxicity also reduced auxin levels in root tips by reducing IAA biosynthesis and down-regulating the expression of auxin efflux carriers PIN4 and PIN7. Loss of function pin4 and pin7 mutants showed less inhibition of root growth than col-0 seedlings. These results indicated that this inhibitory effect of Mn toxicity on PR growth was mediated by affecting auxin biosynthesis and the expression of auxin efflux transporters PIN4 and PIN7.
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Affiliation(s)
- Jingjing Zhao
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, KunmingChina
| | - Wenying Wang
- College of Life Science and Geography, Qinghai Normal UniversityXining, China
| | - Huakun Zhou
- Northwest Institute of Plateau Biology, Chinese Academy of SciencesXining, China
| | - Ruling Wang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, KunmingChina
| | - Ping Zhang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, KunmingChina
| | - Huichun Wang
- College of Life Science and Geography, Qinghai Normal UniversityXining, China
| | - Xiangliang Pan
- College of Environment, Zhejiang University of TechnologyHangzhou, China
- *Correspondence: Jin Xu, Xiangliang Pan,
| | - Jin Xu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, KunmingChina
- *Correspondence: Jin Xu, Xiangliang Pan,
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Liu Y, Sun L, Zhang P, Wan J, Wang R, Xu J. Lanthanum Inhibits Primary Root Growth by Repressing Auxin Carrier Abundances in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2017; 8:1661. [PMID: 28993788 PMCID: PMC5622300 DOI: 10.3389/fpls.2017.01661] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/11/2017] [Indexed: 05/05/2023]
Abstract
Lanthanum (La) is one of rare earth elements that was used as a crop growth stimulants; however, high concentration of La markedly inhibited plant growth. Our previous study indicated that, although La induced the expression of auxin biosynthesis-related genes, it markedly repressed primary root (PR) elongation by reducing auxin accumulation in PR tips. In this study, we exhibited that La reduces the abundances of auxin carriers. Treatment with La markedly inhibited the auxins IAA-, 2,4-D-, and NAA-induced elevation of DR5:GUS activity in the roots, suggesting that La inhibited auxin transport through both the influx and efflux transporters. Supplementation with auxin transport inhibitor naphthylphthalamic acid in La-treated seedlings did not further reduce PR growth compared with that of the La treatment alone, further confirmed that auxin transport is involved in La-induced inhibition of PR growth. Analysis of the protein abundances using the transgenic AUX1-YFP and PIN1/2/4/7-GFP marker lines indicated that La treatment reduced the abundances of all these auxin carriers in the PR tips. La also increased the stabilization of Aux/IAA protein AXR3. Taken together, these results indicated that La treatment inhibits PIN-mediated auxin transport and subsequently impairs auxin distribution and PR growth via reducing auxin carrier abundances.
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Affiliation(s)
- Yangyang Liu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
| | - Liangliang Sun
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
| | - Ping Zhang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
- University of Chinese Academy of SciencesBeijing, China
| | - Jinpeng Wan
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
- University of Chinese Academy of SciencesBeijing, China
| | - Ruling Wang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
| | - Jin Xu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesMengla, China
- *Correspondence: Jin Xu,
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