Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips
Aluminum (Al) toxicity is the primary factor limiting agricultural productivity in acid soils. The cell wall is mainly composed of saccharides and the first barrier for aluminum (Al) to enter plant root cells, but it is unknown whether and how root saccharide components are involved in regulating th...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/3/629 |
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| author | Qing-Bin Sun Chun-Qin Yin Han Zheng Xiao-Ying Dong Ren-Fang Shen Xue-Qiang Zhao |
| author_facet | Qing-Bin Sun Chun-Qin Yin Han Zheng Xiao-Ying Dong Ren-Fang Shen Xue-Qiang Zhao |
| author_sort | Qing-Bin Sun |
| collection | DOAJ |
| description | Aluminum (Al) toxicity is the primary factor limiting agricultural productivity in acid soils. The cell wall is mainly composed of saccharides and the first barrier for aluminum (Al) to enter plant root cells, but it is unknown whether and how root saccharide components are involved in regulating the Al tolerance of <i>Lespedeza</i> that is well adapted to acid soils. Here, we used Al-tolerant <i>Lespedeza bicolor</i> and Al-sensitive <i>Lespedeza cuneata</i> to examine the association of root saccharide components with <i>Lespedeza</i> Al tolerance through analyzing the saccharide changes of roots exposed to Al toxicity. Al-sensitive <i>Lespedeza</i> accumulated more Al and pectin but less hemicellulose in the root cell walls than Al-tolerant <i>Lespedeza</i>. Al treatment decreased the amounts of total sugar secreted from and within the roots of only Al-tolerant <i>Lespedeza</i>. Al treatment decreased the content of root monosaccharides including glucose and mannose in both <i>Lespedeza</i> species, but increased the xylose contents in only Al-sensitive <i>Lespedeza</i>. Taken together, less cell wall pectin rather than hemicellulose is responsible for less root Al accumulation, and Al-decreased root saccharide contents may enhance root organic-acid secretion to chelate toxic Al, both of which contribute to <i>Lespedeza</i> Al tolerance. |
| first_indexed | 2024-03-11T07:03:45Z |
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| id | doaj.art-abe9e41a5c454804b3d81488e684eedd |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-11T07:03:45Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-abe9e41a5c454804b3d81488e684eedd2023-11-17T09:03:52ZengMDPI AGAgronomy2073-43952023-02-0113362910.3390/agronomy13030629Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root TipsQing-Bin Sun0Chun-Qin Yin1Han Zheng2Xiao-Ying Dong3Ren-Fang Shen4Xue-Qiang Zhao5School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaSchool of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaHubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University, Huangshi 435003, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaAluminum (Al) toxicity is the primary factor limiting agricultural productivity in acid soils. The cell wall is mainly composed of saccharides and the first barrier for aluminum (Al) to enter plant root cells, but it is unknown whether and how root saccharide components are involved in regulating the Al tolerance of <i>Lespedeza</i> that is well adapted to acid soils. Here, we used Al-tolerant <i>Lespedeza bicolor</i> and Al-sensitive <i>Lespedeza cuneata</i> to examine the association of root saccharide components with <i>Lespedeza</i> Al tolerance through analyzing the saccharide changes of roots exposed to Al toxicity. Al-sensitive <i>Lespedeza</i> accumulated more Al and pectin but less hemicellulose in the root cell walls than Al-tolerant <i>Lespedeza</i>. Al treatment decreased the amounts of total sugar secreted from and within the roots of only Al-tolerant <i>Lespedeza</i>. Al treatment decreased the content of root monosaccharides including glucose and mannose in both <i>Lespedeza</i> species, but increased the xylose contents in only Al-sensitive <i>Lespedeza</i>. Taken together, less cell wall pectin rather than hemicellulose is responsible for less root Al accumulation, and Al-decreased root saccharide contents may enhance root organic-acid secretion to chelate toxic Al, both of which contribute to <i>Lespedeza</i> Al tolerance.https://www.mdpi.com/2073-4395/13/3/629Al toleranceapoplastcell wallhemicellulose<i>Lespedeza</i>monosaccharide |
| spellingShingle | Qing-Bin Sun Chun-Qin Yin Han Zheng Xiao-Ying Dong Ren-Fang Shen Xue-Qiang Zhao Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips Agronomy Al tolerance apoplast cell wall hemicellulose <i>Lespedeza</i> monosaccharide |
| title | Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips |
| title_full | Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips |
| title_fullStr | Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips |
| title_full_unstemmed | Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips |
| title_short | Higher Aluminum Tolerance of <i>Lespedeza bicolor</i> Relative to <i>Lespedeza cuneata</i> Is Associated with Saccharide Components of Root Tips |
| title_sort | higher aluminum tolerance of i lespedeza bicolor i relative to i lespedeza cuneata i is associated with saccharide components of root tips |
| topic | Al tolerance apoplast cell wall hemicellulose <i>Lespedeza</i> monosaccharide |
| url | https://www.mdpi.com/2073-4395/13/3/629 |
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