Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress
The alleviative effects of silicon (Si) on cadmium (Cd) toxicity were investigated in cucumber (Cucumis sativus L.) and tomato (Solanum lycopersicum L.) grown hydroponically. The growth of both plant species was inhibited by 100 μM Cd, but Si application counteracted the adverse effects on growth. S...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-06-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00453/full |
| _version_ | 1818952301862191104 |
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| author | Jiawen eWu Jia eGuo Yanhong eHu Haijun eGong |
| author_facet | Jiawen eWu Jia eGuo Yanhong eHu Haijun eGong |
| author_sort | Jiawen eWu |
| collection | DOAJ |
| description | The alleviative effects of silicon (Si) on cadmium (Cd) toxicity were investigated in cucumber (Cucumis sativus L.) and tomato (Solanum lycopersicum L.) grown hydroponically. The growth of both plant species was inhibited by 100 μM Cd, but Si application counteracted the adverse effects on growth. Si application significantly decreased the Cd concentrations in shoots of both species and roots of cucumber. The root-to-shoot transport of Cd was depressed by added Si in tomato whereas it was increased by added Si in cucumber. The total content of organic acids decreased in tomato leaves but increased in cucumber roots and leaves under Cd stress. Si application also increased the cell wall polysaccharide levels in the roots of both species under Cd toxicity. Si-mediated changes in levels of organic acids and cell wall polysaccharides might contribute to the differences in Cd transport in the two species. In addition, Si application also mitigated Cd-induced oxidative damage in both species. The results indicate that there were different mechanisms for Si-mediated decrease in shoot Cd accumulation: in tomato, Si supply decreased root-to-shoot Cd transport; whereas in cucumber, Si supply reduced the Cd uptake by roots. It is suggested that Si-mediated Cd tolerance is associated with different physiological responses in tomato and cucumber plants. |
| first_indexed | 2024-12-20T09:48:13Z |
| format | Article |
| id | doaj.art-fb521ab9db5c4456ae7f243770e7e07a |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-20T09:48:13Z |
| publishDate | 2015-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-fb521ab9db5c4456ae7f243770e7e07a2022-12-21T19:44:42ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2015-06-01610.3389/fpls.2015.00453141391Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stressJiawen eWu0Jia eGuo1Yanhong eHu2Haijun eGong3Northwest A&F UniversityNorthwest A&F UniversityNorthwest A&F UniversityNorthwest A&F UniversityThe alleviative effects of silicon (Si) on cadmium (Cd) toxicity were investigated in cucumber (Cucumis sativus L.) and tomato (Solanum lycopersicum L.) grown hydroponically. The growth of both plant species was inhibited by 100 μM Cd, but Si application counteracted the adverse effects on growth. Si application significantly decreased the Cd concentrations in shoots of both species and roots of cucumber. The root-to-shoot transport of Cd was depressed by added Si in tomato whereas it was increased by added Si in cucumber. The total content of organic acids decreased in tomato leaves but increased in cucumber roots and leaves under Cd stress. Si application also increased the cell wall polysaccharide levels in the roots of both species under Cd toxicity. Si-mediated changes in levels of organic acids and cell wall polysaccharides might contribute to the differences in Cd transport in the two species. In addition, Si application also mitigated Cd-induced oxidative damage in both species. The results indicate that there were different mechanisms for Si-mediated decrease in shoot Cd accumulation: in tomato, Si supply decreased root-to-shoot Cd transport; whereas in cucumber, Si supply reduced the Cd uptake by roots. It is suggested that Si-mediated Cd tolerance is associated with different physiological responses in tomato and cucumber plants.http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00453/fullCadmiumSiliconorganic acidAntioxidant DefenseCell wall polysaccharideCd transport |
| spellingShingle | Jiawen eWu Jia eGuo Yanhong eHu Haijun eGong Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress Frontiers in Plant Science Cadmium Silicon organic acid Antioxidant Defense Cell wall polysaccharide Cd transport |
| title | Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress |
| title_full | Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress |
| title_fullStr | Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress |
| title_full_unstemmed | Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress |
| title_short | Distinct physiological responses of tomato and cucumber plants in silicon-mediated alleviation of cadmium stress |
| title_sort | distinct physiological responses of tomato and cucumber plants in silicon mediated alleviation of cadmium stress |
| topic | Cadmium Silicon organic acid Antioxidant Defense Cell wall polysaccharide Cd transport |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00453/full |
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