Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant
<i>Bletilla striata</i> is an endangered medicinal plant the habitats of which are polluted by cadmium (Cd). Nutrient management is a potential way to mitigate Cd toxicity, providing reference for <i>B. striata</i> artificial cultivation. Pot experiments were undertaken to ex...
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MDPI AG
2021-06-01
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| Series: | Agriculture |
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| author | Jiyuan Yang Hui Sun Jihong Qin Xiaoqin Wang Wenqing Chen |
| author_facet | Jiyuan Yang Hui Sun Jihong Qin Xiaoqin Wang Wenqing Chen |
| author_sort | Jiyuan Yang |
| collection | DOAJ |
| description | <i>Bletilla striata</i> is an endangered medicinal plant the habitats of which are polluted by cadmium (Cd). Nutrient management is a potential way to mitigate Cd toxicity, providing reference for <i>B. striata</i> artificial cultivation. Pot experiments were undertaken to examine the effect of five levels of Cd concentration (control: 0.28 mg/kg; I: 0.37 mg/kg; II: 1.00 mg/kg; III: 7.39 mg/kg; IV: 54.6 mg/kg) on the temporal dynamics of nutrient allocation in <i>B. striata</i> components. The results showed that the content and accumulation of Cd increased significantly in all tissues of <i>Bletilla striata</i> as Cd concentration was increasing, and most accumulated in the roots and slightly transferred to the aboveground parts, while tubers were less likely to accumulate Cd. Excessive cadmium accumulation under long-term exposure reduced the biomass of all tissues of <i>B. striata</i>, and the yield was not significantly affected when cultivated in soil with a concentration of Cd ≤ 1 mg/kg. Potassium (K) was quickly transferred from the root to other tissues in response to the Cd stress. The absorption of zinc (Zn) increased at first and then decreased with increased Cd concentration. According to Pearson correlation analysis, a mechanism is suggested that Cd accumulation affects the absorption of nutrients but is positively and significantly correlated with translocation factor of K and Zn in the tuber. This may imply that <i>B. striata</i> tends to promote the absorption of nutrient elements to adapt to the Cd enrichment in tubers and to compensate for the interrupted mineral nutrition metabolism. |
| first_indexed | 2024-03-10T10:02:00Z |
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| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-10T10:02:00Z |
| publishDate | 2021-06-01 |
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| series | Agriculture |
| spelling | doaj.art-cc3d9a416384427095a2f14df2d0925b2023-11-22T01:54:32ZengMDPI AGAgriculture2077-04722021-06-0111759410.3390/agriculture11070594Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine PlantJiyuan Yang0Hui Sun1Jihong Qin2Xiaoqin Wang3Wenqing Chen4Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaDepartment of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaDepartment of Environmental Engineering, School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, ChinaDepartment of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaDepartment of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China<i>Bletilla striata</i> is an endangered medicinal plant the habitats of which are polluted by cadmium (Cd). Nutrient management is a potential way to mitigate Cd toxicity, providing reference for <i>B. striata</i> artificial cultivation. Pot experiments were undertaken to examine the effect of five levels of Cd concentration (control: 0.28 mg/kg; I: 0.37 mg/kg; II: 1.00 mg/kg; III: 7.39 mg/kg; IV: 54.6 mg/kg) on the temporal dynamics of nutrient allocation in <i>B. striata</i> components. The results showed that the content and accumulation of Cd increased significantly in all tissues of <i>Bletilla striata</i> as Cd concentration was increasing, and most accumulated in the roots and slightly transferred to the aboveground parts, while tubers were less likely to accumulate Cd. Excessive cadmium accumulation under long-term exposure reduced the biomass of all tissues of <i>B. striata</i>, and the yield was not significantly affected when cultivated in soil with a concentration of Cd ≤ 1 mg/kg. Potassium (K) was quickly transferred from the root to other tissues in response to the Cd stress. The absorption of zinc (Zn) increased at first and then decreased with increased Cd concentration. According to Pearson correlation analysis, a mechanism is suggested that Cd accumulation affects the absorption of nutrients but is positively and significantly correlated with translocation factor of K and Zn in the tuber. This may imply that <i>B. striata</i> tends to promote the absorption of nutrient elements to adapt to the Cd enrichment in tubers and to compensate for the interrupted mineral nutrition metabolism.https://www.mdpi.com/2077-0472/11/7/594heavy metalscadmiumphytotoxicitynutritional allocationtraditional chinese medicine<i>Bletilla striata</i> |
| spellingShingle | Jiyuan Yang Hui Sun Jihong Qin Xiaoqin Wang Wenqing Chen Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant Agriculture heavy metals cadmium phytotoxicity nutritional allocation traditional chinese medicine <i>Bletilla striata</i> |
| title | Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant |
| title_full | Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant |
| title_fullStr | Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant |
| title_full_unstemmed | Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant |
| title_short | Impacts of Cd on Temporal Dynamics of Nutrient Distribution Pattern of <i>Bletilla striata</i>, a Traditional Chinese Medicine Plant |
| title_sort | impacts of cd on temporal dynamics of nutrient distribution pattern of i bletilla striata i a traditional chinese medicine plant |
| topic | heavy metals cadmium phytotoxicity nutritional allocation traditional chinese medicine <i>Bletilla striata</i> |
| url | https://www.mdpi.com/2077-0472/11/7/594 |
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