Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i>
Oilseed rape (<i>Brassica napus</i>) is a Cadmium (Cd) hyperaccumulator. However, high-level Cd at the early seedling stage seriously arrests the growth of rape, which limits its applications. <i>Brassica juncea</i> had higher Cd accumulation capacity, but its biomass was low...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/9/7/904 |
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| author | Zhong-Wei Zhang Yi-Ying Dong Ling-Yang Feng Zong-Lin Deng Qiang Xu Qi Tao Chang-Quan Wang Yang-Er Chen Ming Yuan Shu Yuan |
| author_facet | Zhong-Wei Zhang Yi-Ying Dong Ling-Yang Feng Zong-Lin Deng Qiang Xu Qi Tao Chang-Quan Wang Yang-Er Chen Ming Yuan Shu Yuan |
| author_sort | Zhong-Wei Zhang |
| collection | DOAJ |
| description | Oilseed rape (<i>Brassica napus</i>) is a Cadmium (Cd) hyperaccumulator. However, high-level Cd at the early seedling stage seriously arrests the growth of rape, which limits its applications. <i>Brassica juncea</i> had higher Cd accumulation capacity, but its biomass was lower, also limiting its applications. Previous studies have confirmed that Selenium (Se) can alleviate Cd toxicity. However, the regulatory mechanism of Se in different valence states of Cd accumulation was unclear. In this study, we investigated the ameliorating effects of three Se valence states, Na<sub>2</sub>SeO<sub>4</sub> [Se(VI)], Na<sub>2</sub>SeO<sub>3</sub> [Se(IV)] and Se-Met [Se(II)], to Cd toxicity by physiological and biochemical approaches in hydroponically-cultured <i>Brassica juncea</i> and <i>Brassica napus</i> seedlings. Although Se treatments slightly inhibited seedling Cd concentration, it tripled or quadrupled the Cd accumulation level per plant, because dry weight increased about four times more with Se and Cd application than with Cd treatment alone. Among the different valence states of Se, Se(II) had the most marked effect on reducing Cd toxicity as evidenced by decreased growth inhibition and Cd content. The application of Se(II) was effective in reducing Cd-induced reactive oxygen species accumulation, and promoted the antioxidant enzyme activity and photosynthesis of both <i>Brassica</i> species. In addition, Se(II) treatment increased the concentrations of Cd in the cell wall and soluble fractions, but the Cd concentration in the organelle part was reduced. |
| first_indexed | 2024-03-10T18:25:00Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T18:25:00Z |
| publishDate | 2020-07-01 |
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| record_format | Article |
| series | Plants |
| spelling | doaj.art-b912be5dc48a4a3d80deb1607ad051632023-11-20T07:08:18ZengMDPI AGPlants2223-77472020-07-019790410.3390/plants9070904Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i>Zhong-Wei Zhang0Yi-Ying Dong1Ling-Yang Feng2Zong-Lin Deng3Qiang Xu4Qi Tao5Chang-Quan Wang6Yang-Er Chen7Ming Yuan8Shu Yuan9College of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Agronomy, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Life Science, Sichuan Agricultural University, Ya’an 625014, ChinaCollege of Life Science, Sichuan Agricultural University, Ya’an 625014, ChinaCollege of Life Science, Sichuan Agricultural University, Chengdu 611130, ChinaOilseed rape (<i>Brassica napus</i>) is a Cadmium (Cd) hyperaccumulator. However, high-level Cd at the early seedling stage seriously arrests the growth of rape, which limits its applications. <i>Brassica juncea</i> had higher Cd accumulation capacity, but its biomass was lower, also limiting its applications. Previous studies have confirmed that Selenium (Se) can alleviate Cd toxicity. However, the regulatory mechanism of Se in different valence states of Cd accumulation was unclear. In this study, we investigated the ameliorating effects of three Se valence states, Na<sub>2</sub>SeO<sub>4</sub> [Se(VI)], Na<sub>2</sub>SeO<sub>3</sub> [Se(IV)] and Se-Met [Se(II)], to Cd toxicity by physiological and biochemical approaches in hydroponically-cultured <i>Brassica juncea</i> and <i>Brassica napus</i> seedlings. Although Se treatments slightly inhibited seedling Cd concentration, it tripled or quadrupled the Cd accumulation level per plant, because dry weight increased about four times more with Se and Cd application than with Cd treatment alone. Among the different valence states of Se, Se(II) had the most marked effect on reducing Cd toxicity as evidenced by decreased growth inhibition and Cd content. The application of Se(II) was effective in reducing Cd-induced reactive oxygen species accumulation, and promoted the antioxidant enzyme activity and photosynthesis of both <i>Brassica</i> species. In addition, Se(II) treatment increased the concentrations of Cd in the cell wall and soluble fractions, but the Cd concentration in the organelle part was reduced.https://www.mdpi.com/2223-7747/9/7/904Seleniumchlorophyll fluorescenceCadmiumsubcellular distributionaccumulation capacity |
| spellingShingle | Zhong-Wei Zhang Yi-Ying Dong Ling-Yang Feng Zong-Lin Deng Qiang Xu Qi Tao Chang-Quan Wang Yang-Er Chen Ming Yuan Shu Yuan Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> Plants Selenium chlorophyll fluorescence Cadmium subcellular distribution accumulation capacity |
| title | Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> |
| title_full | Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> |
| title_fullStr | Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> |
| title_full_unstemmed | Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> |
| title_short | Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species—<i>Brassica napus</i> and <i>B. juncea</i> |
| title_sort | selenium enhances cadmium accumulation capability in two mustard family species i brassica napus i and i b juncea i |
| topic | Selenium chlorophyll fluorescence Cadmium subcellular distribution accumulation capacity |
| url | https://www.mdpi.com/2223-7747/9/7/904 |
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